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Spring 對事務管理的支援

Spring AOP @AspectJ進階
@AspectJ可以使用切點函式定義切點,我們還可以使用邏輯運算子對切點進行復核運算得到複合的切點,為了在切面中重用切點,我們還可以對切點進行命名,以便在其他的地方引用定義過的切點。當一個連線點匹配多個切點時,需要考慮織入順序的問題,此外一個重要的問題是如何再增強中訪問連線點上下文的資訊。

Waiter介面:
package com.yyq.aspectJAdvanced;
public interface Waiter {
void greetTo(String name);
void serveTo(String name);
}
NaiveWaiter實現類:

複製程式碼
package com.yyq.aspectJAdvanced;
public class NaiveWaiter implements Waiter {
@Override
public void greetTo(String name) {
System.out.println("NaiveWaiter:greet to " + name + “…”);
}
@Override
public void serveTo(String name) {
System.out.println("NaiveWaiter:serving to " + name + “…”);
}
public void smile(String clientName,int times){
System.out.println("NaiveWaiter:smile to "+clientName+ times+“times…”);
}
}
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NaughtyWaiter實現類:

複製程式碼
package com.yyq.aspectJAdvanced;
public class NaughtyWaiter implements Waiter {
public void greetTo(String clientName) {
System.out.println("NaughtyWaiter:greet to " + clientName + “…”);
}
public void serveTo(String clientName) {
System.out.println("NaughtyWaiter:serving " + clientName + “…”);
}
public void joke(String clientName, int times) {
System.out.println("NaughtyWaiter:play " + times + " jokes to " + clientName + “…”);
}
}
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Seller介面:

package com.yyq.aspectJAdvanced;
public interface Seller {
int sell(String goods, String clientName);
}
SmallSeller實現類:

複製程式碼
package com.yyq.aspectJAdvanced;
public class SmartSeller implements Seller {
public int sell(String goods,String clientName) {
System.out.println(“SmartSeller: sell “+goods +” to “+clientName+”…”);
return 100;
}

public void checkBill(int billId){
    if(billId == 1) throw new IllegalArgumentException("iae Exception");
    else throw new RuntimeException("re Exception");
}

}
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beans.xml配置檔案:

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<?xml version="1.0" encoding="UTF-8" ?>


<aop:aspectj-autoproxy proxy-target-class=“true”/>


複製程式碼 1、切點符合運算 使用切點符合運算子,我們將擁有強大而靈活的切點表達能力。 TestAspect:切點符合運算定義切面 複製程式碼 package com.yyq.aspectJAdvanced; import org.aspectj.lang.annotation.After; import org.aspectj.lang.annotation.AfterReturning; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before;

@Aspect
public class TestAspect {
//與非運算
@Before("!target(com.yyq.aspectJAdvanced.NaiveWaiter) && execution(* serveTo(…))")
public void notServeInNaiveWaiter(){
System.out.println("–notServeInNaiveWaiter() executed!–");
}
//與運算
@After(“within(com.yyq.aspectJAdvanced.) && execution( greetTo(…))”)
public void greetToFun(){
System.out.println("–greetToFun() executed!–");
}
//或運算
@AfterReturning(“target(com.yyq.aspectJAdvanced.Waiter) || target(com.yyq.aspectJAdvanced.Seller)”)
public void waiterOrSeller(){
System.out.println("–waiterOrSeller() executed!–");
}
}
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測試方法:

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@Test
public void pointAspectJTest() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter naiveWaiter = (Waiter) ctx.getBean(“naiveWaiter”);
Waiter naughtyWaiter = (Waiter) ctx.getBean(“naughtyWaiter”);
naiveWaiter.greetTo(“John”);
naiveWaiter.serveTo(“John”);
naughtyWaiter.greetTo(“Tom”);
naughtyWaiter.serveTo(“Tom”);
}
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輸出結果:
NaiveWaiter:greet to John…
–greetToFun() executed!–
–waiterOrSeller() executed!–
NaiveWaiter:serving to John…
–waiterOrSeller() executed!–
NaughtyWaiter:greet to Tom…
–greetToFun() executed!–
–waiterOrSeller() executed!–
–notServeInNaiveWaiter() executed!–
NaughtyWaiter:serving Tom…
–waiterOrSeller() executed!–

2、命名切點
切點直接宣告在增強方法處被稱為匿名切點,匿名切點只能在宣告處使用。如果希望在其他地方重用一個切點,我們可以通過@Pointcut註解以及切面類方法對切點進行命名。
TestNamePointcut:命名切點類
複製程式碼
package com.yyq.aspectJAdvanced;
import org.aspectj.lang.annotation.Pointcut;
public class TestNamePointcut {
//通過註解方法inPackage()對該切點進行命名,方法可視域修飾符為private,表明該命名切點只能在本切面類中使用
@Pointcut(“within(com.yyq.aspectJAdvaned.)")
private void inPackage(){}
@Pointcut("execution(
greetTo(…))”)
protected void greetTo(){}
@Pointcut(“inPackage() and greetTo()”)
public void inPkgGreetTo(){}
}
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TestAspect2:切面實現類

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package com.yyq.aspectJAdvanced;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
@Aspect
public class TestAspect2 {
@Before(“TestNamePointcut.inPkgGreetTo()”)
public void pkgGreetTo(){
System.out.println("–pkgGreetTo() executed!–");
}
@Before(“target(com.yyq.aspectJAdvanced.NaiveWaiter) || TestNamePointcut.inPkgGreetTo()”)
public void pkgGreetToNotnaiveWaiter(){
System.out.println("–pkgGreetToNotnaiveWaiter() executed!–");
}
}
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測試方法:

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@Test
public void pointAspectJTest2() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
NaiveWaiter naiveWaiter = (NaiveWaiter) ctx.getBean(“naiveWaiter”);
naiveWaiter.smile(“Andy”, 2);
}
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輸出結果:
–pkgGreetToNotnaiveWaiter() executed!–
NaiveWaiter:smile to Andy2times…

3、增強織入的順序
一個連線點可以同時匹配多個切點,切點對應的增強在連線點上的織入順序的安排主要有以下3種情況:
1)如果增強在同一個切面類中宣告,則依照增強在切面類中定義的順序進行織入;
2)如何增強位於不同的切面類中,且這些切面類都實現了org.springframework.core.Order介面,則由介面方法的順序號決定(順序號小的先織入);
3)如果增強位於不同的切面類中,且這些切面類沒有實現org.springframework.core.Order介面,織入的順序是不確定的。

4、訪問連線點資訊
AspectJ使用org.aspectj.lang.JoinPoint介面表示目標類連線點物件,如果是環繞增強時,使用org.aspectj.lang.ProceedingJoinPoint表示連線點物件,該類是JoinPoint的子介面,任何一個增強方法都可以通過將第一個入參宣告為JoinPoint訪問到連線點上下文的資訊。
TestAspect3:切面實現類
複製程式碼
@Aspect
public class TestAspect3 {
@Around(“execution(* greetTo(…)) && target(com.yyq.aspectJAdvanced.NaiveWaiter)”)
public void joinPointAccess(ProceedingJoinPoint pjp) throws Throwable {
System.out.println("—joinPointAccess—");
System.out.println(“args[0]:” + pjp.getArgs()[0]);
System.out.println(“signature:” + pjp.getTarget().getClass());
pjp.proceed();
System.out.println("—joinPointAccess—");
}
}
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測試方法:

複製程式碼
@Test
public void pointAspectJTest3() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter naiveWaiter = (Waiter) ctx.getBean(“naiveWaiter”);
naiveWaiter.greetTo(“Andy”);
}
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輸出結果:
—joinPointAccess—
args[0]:Andy
signature:class com.yyq.aspectJAdvanced.NaiveWaiter
NaiveWaiter:greet to Andy…
—joinPointAccess—

5、繫結連線點方法入參
args()用於繫結連線點方法的入參;@annotation()用於繫結連線點方法的註解物件;而@args()用於繫結連線點方法入參的註解。
TestAspect4:切面實現類
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@Aspect
public class TestAspect4 {
@Before(“target(com.yyq.aspectJAdvanced.NaiveWaiter) && args(name,num,…)”)
public void bindJoinPointParams(int num, String name) {
System.out.println("—bindJoinPointParams—");
System.out.println(“name:” + name);
System.out.println(“num:” + num);
System.out.println("—bindJoinPointParams—");
}
}
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測試方法:

複製程式碼
@Test
public void pointAspectJTest4() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
NaiveWaiter naiveWaiter = (NaiveWaiter) ctx.getBean(“naiveWaiter”);
naiveWaiter.smile(“Andy”, 3);
}
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輸出結果:
—bindJoinPointParams—
name:Andy
num:3
—bindJoinPointParams—
NaiveWaiter:smile to Andy 3 times…

6、繫結代理物件
使用this()或target()可繫結被代理物件例項,在通過類例項名繫結物件時,還依然具有原來連線點匹配的功能,只不過類名是通過增強方法中同名入參的型別間接決定罷了。
TestAspect5:切面實現類
複製程式碼
@Aspect
public class TestAspect5 {
@Before(“this(waiter)”)
public void bindProxyObj(Waiter waiter){
System.out.println("—bindProxyObj—");
System.out.println(waiter.getClass().getName());
System.out.println("—bindProxyObj—");
}
}
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測試方法:

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@Test
public void pointAspectJTest5() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter waiter = (Waiter) ctx.getBean(“naiveWaiter”);
waiter.greetTo(“Yang”);
}
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輸出結果:
—bindProxyObj—
com.yyq.aspectJAdvanced.NaiveWaiter E n h a n c e r B y C G L I B EnhancerByCGLIB fefafe52
—bindProxyObj—
NaiveWaiter:greet to Yang…

7、繫結類註解物件
@within()和@target()函式可以將目標類的註解物件繫結到增強方法中,我們通過@within()演示註解繫結的操作。
TestAspect6:切面測試類
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@Aspect
public class TestAspect6 {
@Before("@within(m)")
public void bindTypeAnnoObject(Monitorable m) {
System.out.println("—bindTypeAnnoObject—");
System.out.println(m.getClass().getName());
System.out.println("—bindTypeAnnoObject—");
}
}
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測試方法:

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@Test
public void pointAspectJTest6() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter waiter = (Waiter) ctx.getBean(“naiveWaiter2”);
((NaiveWaiter2)waiter).greetTo(“Yang”);
}
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輸出結果:
—bindTypeAnnoObject—
$Proxy4
—bindTypeAnnoObject—
NaiveWaiter:greet to Yang…

8、繫結返回值
在後置增強中,我們可以通過returning繫結連線點方法的返回值。
TestAspect7:切面實現類
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@Aspect
public class TestAspect7 {
@AfterReturning(value = “target(com.yyq.aspectJAdvanced.SmartSeller)”, returning = “retVal”)
public void bindReturnValue(int retVal) {
System.out.println("—bindReturnValue—");
System.out.println(“returnValue:” + retVal);
System.out.println("—bindReturnValue—");
}
}
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測試方法:

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@Test
public void pointAspectJTest7() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
SmartSeller seller = (SmartSeller) ctx.getBean(“seller”);
seller.sell(“Beer”, “John”);
}
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輸出結果:
SmartSeller: sell Beer to John…
—bindReturnValue—
returnValue:100
—bindReturnValue—

9、繫結丟擲的異常
和通過切點函式繫結連線點資訊不同,連線點丟擲的異常必須使用AfterThrowing註解的throwing成員進行繫結。
TestAspect8:切面實現類
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@Aspect
public class TestAspect8 {
@AfterThrowing(value = “target(com.yyq.aspectJAdvanced.SmartSeller)”, throwing = “iae”)
public void bindException(IllegalArgumentException iae) {
System.out.println("—bindException—");
System.out.println(“exception:” + iae.getMessage());
System.out.println("—bindException—");
}
}
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測試方法:

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@Test
public void pointAspectJTest8() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
SmartSeller seller = (SmartSeller) ctx.getBean(“seller”);
seller.checkBill(1);
}
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輸出結果:
—bindException—
exception:iae Exception
—bindException—

java.lang.IllegalArgumentException: iae Exception

上面文章轉載為[https://www.cnblogs.com/yangyquin/p/5582911.html]Spring AOP @AspectJ進階
@AspectJ可以使用切點函式定義切點,我們還可以使用邏輯運算子對切點進行復核運算得到複合的切點,為了在切面中重用切點,我們還可以對切點進行命名,以便在其他的地方引用定義過的切點。當一個連線點匹配多個切點時,需要考慮織入順序的問題,此外一個重要的問題是如何再增強中訪問連線點上下文的資訊。

Waiter介面:
package com.yyq.aspectJAdvanced;
public interface Waiter {
void greetTo(String name);
void serveTo(String name);
}
NaiveWaiter實現類:

複製程式碼
package com.yyq.aspectJAdvanced;
public class NaiveWaiter implements Waiter {
@Override
public void greetTo(String name) {
System.out.println("NaiveWaiter:greet to " + name + “…”);
}
@Override
public void serveTo(String name) {
System.out.println("NaiveWaiter:serving to " + name + “…”);
}
public void smile(String clientName,int times){
System.out.println("NaiveWaiter:smile to "+clientName+ times+“times…”);
}
}
複製程式碼
NaughtyWaiter實現類:

複製程式碼
package com.yyq.aspectJAdvanced;
public class NaughtyWaiter implements Waiter {
public void greetTo(String clientName) {
System.out.println("NaughtyWaiter:greet to " + clientName + “…”);
}
public void serveTo(String clientName) {
System.out.println("NaughtyWaiter:serving " + clientName + “…”);
}
public void joke(String clientName, int times) {
System.out.println("NaughtyWaiter:play " + times + " jokes to " + clientName + “…”);
}
}
複製程式碼
Seller介面:

package com.yyq.aspectJAdvanced;
public interface Seller {
int sell(String goods, String clientName);
}
SmallSeller實現類:

複製程式碼
package com.yyq.aspectJAdvanced;
public class SmartSeller implements Seller {
public int sell(String goods,String clientName) {
System.out.println(“SmartSeller: sell “+goods +” to “+clientName+”…”);
return 100;
}

public void checkBill(int billId){
    if(billId == 1) throw new IllegalArgumentException("iae Exception");
    else throw new RuntimeException("re Exception");
}

}
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beans.xml配置檔案:

複製程式碼

<?xml version="1.0" encoding="UTF-8" ?>


<aop:aspectj-autoproxy proxy-target-class=“true”/>


複製程式碼 1、切點符合運算 使用切點符合運算子,我們將擁有強大而靈活的切點表達能力。 TestAspect:切點符合運算定義切面 複製程式碼 package com.yyq.aspectJAdvanced; import org.aspectj.lang.annotation.After; import org.aspectj.lang.annotation.AfterReturning; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before;

@Aspect
public class TestAspect {
//與非運算
@Before("!target(com.yyq.aspectJAdvanced.NaiveWaiter) && execution(* serveTo(…))")
public void notServeInNaiveWaiter(){
System.out.println("–notServeInNaiveWaiter() executed!–");
}
//與運算
@After(“within(com.yyq.aspectJAdvanced.) && execution( greetTo(…))”)
public void greetToFun(){
System.out.println("–greetToFun() executed!–");
}
//或運算
@AfterReturning(“target(com.yyq.aspectJAdvanced.Waiter) || target(com.yyq.aspectJAdvanced.Seller)”)
public void waiterOrSeller(){
System.out.println("–waiterOrSeller() executed!–");
}
}
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測試方法:

複製程式碼
@Test
public void pointAspectJTest() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter naiveWaiter = (Waiter) ctx.getBean(“naiveWaiter”);
Waiter naughtyWaiter = (Waiter) ctx.getBean(“naughtyWaiter”);
naiveWaiter.greetTo(“John”);
naiveWaiter.serveTo(“John”);
naughtyWaiter.greetTo(“Tom”);
naughtyWaiter.serveTo(“Tom”);
}
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輸出結果:
NaiveWaiter:greet to John…
–greetToFun() executed!–
–waiterOrSeller() executed!–
NaiveWaiter:serving to John…
–waiterOrSeller() executed!–
NaughtyWaiter:greet to Tom…
–greetToFun() executed!–
–waiterOrSeller() executed!–
–notServeInNaiveWaiter() executed!–
NaughtyWaiter:serving Tom…
–waiterOrSeller() executed!–

2、命名切點
切點直接宣告在增強方法處被稱為匿名切點,匿名切點只能在宣告處使用。如果希望在其他地方重用一個切點,我們可以通過@Pointcut註解以及切面類方法對切點進行命名。
TestNamePointcut:命名切點類
複製程式碼
package com.yyq.aspectJAdvanced;
import org.aspectj.lang.annotation.Pointcut;
public class TestNamePointcut {
//通過註解方法inPackage()對該切點進行命名,方法可視域修飾符為private,表明該命名切點只能在本切面類中使用
@Pointcut(“within(com.yyq.aspectJAdvaned.)")
private void inPackage(){}
@Pointcut("execution(
greetTo(…))”)
protected void greetTo(){}
@Pointcut(“inPackage() and greetTo()”)
public void inPkgGreetTo(){}
}
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TestAspect2:切面實現類

複製程式碼
package com.yyq.aspectJAdvanced;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
@Aspect
public class TestAspect2 {
@Before(“TestNamePointcut.inPkgGreetTo()”)
public void pkgGreetTo(){
System.out.println("–pkgGreetTo() executed!–");
}
@Before(“target(com.yyq.aspectJAdvanced.NaiveWaiter) || TestNamePointcut.inPkgGreetTo()”)
public void pkgGreetToNotnaiveWaiter(){
System.out.println("–pkgGreetToNotnaiveWaiter() executed!–");
}
}
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測試方法:

複製程式碼
@Test
public void pointAspectJTest2() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
NaiveWaiter naiveWaiter = (NaiveWaiter) ctx.getBean(“naiveWaiter”);
naiveWaiter.smile(“Andy”, 2);
}
複製程式碼
輸出結果:
–pkgGreetToNotnaiveWaiter() executed!–
NaiveWaiter:smile to Andy2times…

3、增強織入的順序
一個連線點可以同時匹配多個切點,切點對應的增強在連線點上的織入順序的安排主要有以下3種情況:
1)如果增強在同一個切面類中宣告,則依照增強在切面類中定義的順序進行織入;
2)如何增強位於不同的切面類中,且這些切面類都實現了org.springframework.core.Order介面,則由介面方法的順序號決定(順序號小的先織入);
3)如果增強位於不同的切面類中,且這些切面類沒有實現org.springframework.core.Order介面,織入的順序是不確定的。

4、訪問連線點資訊
AspectJ使用org.aspectj.lang.JoinPoint介面表示目標類連線點物件,如果是環繞增強時,使用org.aspectj.lang.ProceedingJoinPoint表示連線點物件,該類是JoinPoint的子介面,任何一個增強方法都可以通過將第一個入參宣告為JoinPoint訪問到連線點上下文的資訊。
TestAspect3:切面實現類
複製程式碼
@Aspect
public class TestAspect3 {
@Around(“execution(* greetTo(…)) && target(com.yyq.aspectJAdvanced.NaiveWaiter)”)
public void joinPointAccess(ProceedingJoinPoint pjp) throws Throwable {
System.out.println("—joinPointAccess—");
System.out.println(“args[0]:” + pjp.getArgs()[0]);
System.out.println(“signature:” + pjp.getTarget().getClass());
pjp.proceed();
System.out.println("—joinPointAccess—");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest3() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter naiveWaiter = (Waiter) ctx.getBean(“naiveWaiter”);
naiveWaiter.greetTo(“Andy”);
}
複製程式碼
輸出結果:
—joinPointAccess—
args[0]:Andy
signature:class com.yyq.aspectJAdvanced.NaiveWaiter
NaiveWaiter:greet to Andy…
—joinPointAccess—

5、繫結連線點方法入參
args()用於繫結連線點方法的入參;@annotation()用於繫結連線點方法的註解物件;而@args()用於繫結連線點方法入參的註解。
TestAspect4:切面實現類
複製程式碼
@Aspect
public class TestAspect4 {
@Before(“target(com.yyq.aspectJAdvanced.NaiveWaiter) && args(name,num,…)”)
public void bindJoinPointParams(int num, String name) {
System.out.println("—bindJoinPointParams—");
System.out.println(“name:” + name);
System.out.println(“num:” + num);
System.out.println("—bindJoinPointParams—");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest4() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
NaiveWaiter naiveWaiter = (NaiveWaiter) ctx.getBean(“naiveWaiter”);
naiveWaiter.smile(“Andy”, 3);
}
複製程式碼
輸出結果:
—bindJoinPointParams—
name:Andy
num:3
—bindJoinPointParams—
NaiveWaiter:smile to Andy 3 times…

6、繫結代理物件
使用this()或target()可繫結被代理物件例項,在通過類例項名繫結物件時,還依然具有原來連線點匹配的功能,只不過類名是通過增強方法中同名入參的型別間接決定罷了。
TestAspect5:切面實現類
複製程式碼
@Aspect
public class TestAspect5 {
@Before(“this(waiter)”)
public void bindProxyObj(Waiter waiter){
System.out.println("—bindProxyObj—");
System.out.println(waiter.getClass().getName());
System.out.println("—bindProxyObj—");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest5() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter waiter = (Waiter) ctx.getBean(“naiveWaiter”);
waiter.greetTo(“Yang”);
}
複製程式碼
輸出結果:
—bindProxyObj—
com.yyq.aspectJAdvanced.NaiveWaiter E n h a n c e r B y C G L I B EnhancerByCGLIB fefafe52
—bindProxyObj—
NaiveWaiter:greet to Yang…

7、繫結類註解物件
@within()和@target()函式可以將目標類的註解物件繫結到增強方法中,我們通過@within()演示註解繫結的操作。
TestAspect6:切面測試類
複製程式碼
@Aspect
public class TestAspect6 {
@Before("@within(m)")
public void bindTypeAnnoObject(Monitorable m) {
System.out.println("—bindTypeAnnoObject—");
System.out.println(m.getClass().getName());
System.out.println("—bindTypeAnnoObject—");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest6() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter waiter = (Waiter) ctx.getBean(“naiveWaiter2”);
((NaiveWaiter2)waiter).greetTo(“Yang”);
}
複製程式碼
輸出結果:
—bindTypeAnnoObject—
$Proxy4
—bindTypeAnnoObject—
NaiveWaiter:greet to Yang…

8、繫結返回值
在後置增強中,我們可以通過returning繫結連線點方法的返回值。
TestAspect7:切面實現類
複製程式碼
@Aspect
public class TestAspect7 {
@AfterReturning(value = “target(com.yyq.aspectJAdvanced.SmartSeller)”, returning = “retVal”)
public void bindReturnValue(int retVal) {
System.out.println("—bindReturnValue—");
System.out.println(“returnValue:” + retVal);
System.out.println("—bindReturnValue—");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest7() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
SmartSeller seller = (SmartSeller) ctx.getBean(“seller”);
seller.sell(“Beer”, “John”);
}
複製程式碼
輸出結果:
SmartSeller: sell Beer to John…
—bindReturnValue—
returnValue:100
—bindReturnValue—

9、繫結丟擲的異常
和通過切點函式繫結連線點資訊不同,連線點丟擲的異常必須使用AfterThrowing註解的throwing成員進行繫結。
TestAspect8:切面實現類
複製程式碼
@Aspect
public class TestAspect8 {
@AfterThrowing(value = “target(com.yyq.aspectJAdvanced.SmartSeller)”, throwing = “iae”)
public void bindException(IllegalArgumentException iae) {
System.out.println("—bindException—");
System.out.println(“exception:” + iae.getMessage());
System.out.println("—bindException—");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest8() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
SmartSeller seller = (SmartSeller) ctx.getBean(“seller”);
seller.checkBill(1);
}
複製程式碼
輸出結果:
—bindException—
exception:iae Exception
—bindException—

java.lang.IllegalArgumentException: iae ExceptionSpring AOP @AspectJ進階
@AspectJ可以使用切點函式定義切點,我們還可以使用邏輯運算子對切點進行復核運算得到複合的切點,為了在切面中重用切點,我們還可以對切點進行命名,以便在其他的地方引用定義過的切點。當一個連線點匹配多個切點時,需要考慮織入順序的問題,此外一個重要的問題是如何再增強中訪問連線點上下文的資訊。

Waiter介面:
package com.yyq.aspectJAdvanced;
public interface Waiter {
void greetTo(String name);
void serveTo(String name);
}
NaiveWaiter實現類:

複製程式碼
package com.yyq.aspectJAdvanced;
public class NaiveWaiter implements Waiter {
@Override
public void greetTo(String name) {
System.out.println("NaiveWaiter:greet to " + name + “…”);
}
@Override
public void serveTo(String name) {
System.out.println("NaiveWaiter:serving to " + name + “…”);
}
public void smile(String clientName,int times){
System.out.println("NaiveWaiter:smile to "+clientName+ times+“times…”);
}
}
複製程式碼
NaughtyWaiter實現類:

複製程式碼
package com.yyq.aspectJAdvanced;
public class NaughtyWaiter implements Waiter {
public void greetTo(String clientName) {
System.out.println("NaughtyWaiter:greet to " + clientName + “…”);
}
public void serveTo(String clientName) {
System.out.println("NaughtyWaiter:serving " + clientName + “…”);
}
public void joke(String clientName, int times) {
System.out.println("NaughtyWaiter:play " + times + " jokes to " + clientName + “…”);
}
}
複製程式碼
Seller介面:

package com.yyq.aspectJAdvanced;
public interface Seller {
int sell(String goods, String clientName);
}
SmallSeller實現類:

複製程式碼
package com.yyq.aspectJAdvanced;
public class SmartSeller implements Seller {
public int sell(String goods,String clientName) {
System.out.println(“SmartSeller: sell “+goods +” to “+clientName+”…”);
return 100;
}

public void checkBill(int billId){
    if(billId == 1) throw new IllegalArgumentException("iae Exception");
    else throw new RuntimeException("re Exception");
}

}
複製程式碼
beans.xml配置檔案:

複製程式碼

<?xml version="1.0" encoding="UTF-8" ?>


<aop:aspectj-autoproxy proxy-target-class=“true”/>


複製程式碼 1、切點符合運算 使用切點符合運算子,我們將擁有強大而靈活的切點表達能力。 TestAspect:切點符合運算定義切面 複製程式碼 package com.yyq.aspectJAdvanced; import org.aspectj.lang.annotation.After; import org.aspectj.lang.annotation.AfterReturning; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before;

@Aspect
public class TestAspect {
//與非運算
@Before("!target(com.yyq.aspectJAdvanced.NaiveWaiter) && execution(* serveTo(…))")
public void notServeInNaiveWaiter(){
System.out.println("–notServeInNaiveWaiter() executed!–");
}
//與運算
@After(“within(com.yyq.aspectJAdvanced.) && execution( greetTo(…))”)
public void greetToFun(){
System.out.println("–greetToFun() executed!–");
}
//或運算
@AfterReturning(“target(com.yyq.aspectJAdvanced.Waiter) || target(com.yyq.aspectJAdvanced.Seller)”)
public void waiterOrSeller(){
System.out.println("–waiterOrSeller() executed!–");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter naiveWaiter = (Waiter) ctx.getBean(“naiveWaiter”);
Waiter naughtyWaiter = (Waiter) ctx.getBean(“naughtyWaiter”);
naiveWaiter.greetTo(“John”);
naiveWaiter.serveTo(“John”);
naughtyWaiter.greetTo(“Tom”);
naughtyWaiter.serveTo(“Tom”);
}
複製程式碼
輸出結果:
NaiveWaiter:greet to John…
–greetToFun() executed!–
–waiterOrSeller() executed!–
NaiveWaiter:serving to John…
–waiterOrSeller() executed!–
NaughtyWaiter:greet to Tom…
–greetToFun() executed!–
–waiterOrSeller() executed!–
–notServeInNaiveWaiter() executed!–
NaughtyWaiter:serving Tom…
–waiterOrSeller() executed!–

2、命名切點
切點直接宣告在增強方法處被稱為匿名切點,匿名切點只能在宣告處使用。如果希望在其他地方重用一個切點,我們可以通過@Pointcut註解以及切面類方法對切點進行命名。
TestNamePointcut:命名切點類
複製程式碼
package com.yyq.aspectJAdvanced;
import org.aspectj.lang.annotation.Pointcut;
public class TestNamePointcut {
//通過註解方法inPackage()對該切點進行命名,方法可視域修飾符為private,表明該命名切點只能在本切面類中使用
@Pointcut(“within(com.yyq.aspectJAdvaned.)")
private void inPackage(){}
@Pointcut("execution(
greetTo(…))”)
protected void greetTo(){}
@Pointcut(“inPackage() and greetTo()”)
public void inPkgGreetTo(){}
}
複製程式碼
TestAspect2:切面實現類

複製程式碼
package com.yyq.aspectJAdvanced;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
@Aspect
public class TestAspect2 {
@Before(“TestNamePointcut.inPkgGreetTo()”)
public void pkgGreetTo(){
System.out.println("–pkgGreetTo() executed!–");
}
@Before(“target(com.yyq.aspectJAdvanced.NaiveWaiter) || TestNamePointcut.inPkgGreetTo()”)
public void pkgGreetToNotnaiveWaiter(){
System.out.println("–pkgGreetToNotnaiveWaiter() executed!–");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest2() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
NaiveWaiter naiveWaiter = (NaiveWaiter) ctx.getBean(“naiveWaiter”);
naiveWaiter.smile(“Andy”, 2);
}
複製程式碼
輸出結果:
–pkgGreetToNotnaiveWaiter() executed!–
NaiveWaiter:smile to Andy2times…

3、增強織入的順序
一個連線點可以同時匹配多個切點,切點對應的增強在連線點上的織入順序的安排主要有以下3種情況:
1)如果增強在同一個切面類中宣告,則依照增強在切面類中定義的順序進行織入;
2)如何增強位於不同的切面類中,且這些切面類都實現了org.springframework.core.Order介面,則由介面方法的順序號決定(順序號小的先織入);
3)如果增強位於不同的切面類中,且這些切面類沒有實現org.springframework.core.Order介面,織入的順序是不確定的。

4、訪問連線點資訊
AspectJ使用org.aspectj.lang.JoinPoint介面表示目標類連線點物件,如果是環繞增強時,使用org.aspectj.lang.ProceedingJoinPoint表示連線點物件,該類是JoinPoint的子介面,任何一個增強方法都可以通過將第一個入參宣告為JoinPoint訪問到連線點上下文的資訊。
TestAspect3:切面實現類
複製程式碼
@Aspect
public class TestAspect3 {
@Around(“execution(* greetTo(…)) && target(com.yyq.aspectJAdvanced.NaiveWaiter)”)
public void joinPointAccess(ProceedingJoinPoint pjp) throws Throwable {
System.out.println("—joinPointAccess—");
System.out.println(“args[0]:” + pjp.getArgs()[0]);
System.out.println(“signature:” + pjp.getTarget().getClass());
pjp.proceed();
System.out.println("—joinPointAccess—");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest3() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter naiveWaiter = (Waiter) ctx.getBean(“naiveWaiter”);
naiveWaiter.greetTo(“Andy”);
}
複製程式碼
輸出結果:
—joinPointAccess—
args[0]:Andy
signature:class com.yyq.aspectJAdvanced.NaiveWaiter
NaiveWaiter:greet to Andy…
—joinPointAccess—

5、繫結連線點方法入參
args()用於繫結連線點方法的入參;@annotation()用於繫結連線點方法的註解物件;而@args()用於繫結連線點方法入參的註解。
TestAspect4:切面實現類
複製程式碼
@Aspect
public class TestAspect4 {
@Before(“target(com.yyq.aspectJAdvanced.NaiveWaiter) && args(name,num,…)”)
public void bindJoinPointParams(int num, String name) {
System.out.println("—bindJoinPointParams—");
System.out.println(“name:” + name);
System.out.println(“num:” + num);
System.out.println("—bindJoinPointParams—");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest4() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
NaiveWaiter naiveWaiter = (NaiveWaiter) ctx.getBean(“naiveWaiter”);
naiveWaiter.smile(“Andy”, 3);
}
複製程式碼
輸出結果:
—bindJoinPointParams—
name:Andy
num:3
—bindJoinPointParams—
NaiveWaiter:smile to Andy 3 times…

6、繫結代理物件
使用this()或target()可繫結被代理物件例項,在通過類例項名繫結物件時,還依然具有原來連線點匹配的功能,只不過類名是通過增強方法中同名入參的型別間接決定罷了。
TestAspect5:切面實現類
複製程式碼
@Aspect
public class TestAspect5 {
@Before(“this(waiter)”)
public void bindProxyObj(Waiter waiter){
System.out.println("—bindProxyObj—");
System.out.println(waiter.getClass().getName());
System.out.println("—bindProxyObj—");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest5() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter waiter = (Waiter) ctx.getBean(“naiveWaiter”);
waiter.greetTo(“Yang”);
}
複製程式碼
輸出結果:
—bindProxyObj—
com.yyq.aspectJAdvanced.NaiveWaiter E n h a n c e r B y C G L I B EnhancerByCGLIB fefafe52
—bindProxyObj—
NaiveWaiter:greet to Yang…

7、繫結類註解物件
@within()和@target()函式可以將目標類的註解物件繫結到增強方法中,我們通過@within()演示註解繫結的操作。
TestAspect6:切面測試類
複製程式碼
@Aspect
public class TestAspect6 {
@Before("@within(m)")
public void bindTypeAnnoObject(Monitorable m) {
System.out.println("—bindTypeAnnoObject—");
System.out.println(m.getClass().getName());
System.out.println("—bindTypeAnnoObject—");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest6() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter waiter = (Waiter) ctx.getBean(“naiveWaiter2”);
((NaiveWaiter2)waiter).greetTo(“Yang”);
}
複製程式碼
輸出結果:
—bindTypeAnnoObject—
$Proxy4
—bindTypeAnnoObject—
NaiveWaiter:greet to Yang…

8、繫結返回值
在後置增強中,我們可以通過returning繫結連線點方法的返回值。
TestAspect7:切面實現類
複製程式碼
@Aspect
public class TestAspect7 {
@AfterReturning(value = “target(com.yyq.aspectJAdvanced.SmartSeller)”, returning = “retVal”)
public void bindReturnValue(int retVal) {
System.out.println("—bindReturnValue—");
System.out.println(“returnValue:” + retVal);
System.out.println("—bindReturnValue—");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest7() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
SmartSeller seller = (SmartSeller) ctx.getBean(“seller”);
seller.sell(“Beer”, “John”);
}
複製程式碼
輸出結果:
SmartSeller: sell Beer to John…
—bindReturnValue—
returnValue:100
—bindReturnValue—

9、繫結丟擲的異常
和通過切點函式繫結連線點資訊不同,連線點丟擲的異常必須使用AfterThrowing註解的throwing成員進行繫結。
TestAspect8:切面實現類
複製程式碼
@Aspect
public class TestAspect8 {
@AfterThrowing(value = “target(com.yyq.aspectJAdvanced.SmartSeller)”, throwing = “iae”)
public void bindException(IllegalArgumentException iae) {
System.out.println("—bindException—");
System.out.println(“exception:” + iae.getMessage());
System.out.println("—bindException—");
}
}
複製程式碼
測試方法:

複製程式碼
@Test
public void pointAspectJTest8() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
SmartSeller seller = (SmartSeller) ctx.getBean(“seller”);
seller.checkBill(1);
}
複製程式碼
輸出結果:
—bindException—
exception:iae Exception
—bindException—

java.lang.IllegalArgumentException: iae ExceptionSpring AOP @AspectJ進階
@AspectJ可以使用切點函式定義切點,我們還可以使用邏輯運算子對切點進行復核運算得到複合的切點,為了在切面中重用切點,我們還可以對切點進行命名,以便在其他的地方引用定義過的切點。當一個連線點匹配多個切點時,需要考慮織入順序的問題,此外一個重要的問題是如何再增強中訪問連線點上下文的資訊。

Waiter介面:
package com.yyq.aspectJAdvanced;
public interface Waiter {
void greetTo(String name);
void serveTo(String name);
}
NaiveWaiter實現類:

複製程式碼
package com.yyq.aspectJAdvanced;
public class NaiveWaiter implements Waiter {
@Override
public void greetTo(String name) {
System.out.println("NaiveWaiter:greet to " + name + “…”);
}
@Override
public void serveTo(String name) {
System.out.println("NaiveWaiter:serving to " + name + “…”);
}
public void smile(String clientName,int times){
System.out.println("NaiveWaiter:smile to "+clientName+ times+“times…”);
}
}
複製程式碼
NaughtyWaiter實現類:

複製程式碼
package com.yyq.aspectJAdvanced;
public class NaughtyWaiter implements Waiter {
public void greetTo(String clientName) {
System.out.println("NaughtyWaiter:greet to " + clientName + “…”);
}
public void serveTo(String clientName) {
System.out.println("NaughtyWaiter:serving " + clientName + “…”);
}
public void joke(String clientName, int times) {
System.out.println("NaughtyWaiter:play " + times + " jokes to " + clientName + “…”);
}
}
複製程式碼
Seller介面:

package com.yyq.aspectJAdvanced;
public interface Seller {
int sell(String goods, String clientName);
}
SmallSeller實現類:

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package com.yyq.aspectJAdvanced;
public class SmartSeller implements Seller {
public int sell(String goods,String clientName) {
System.out.println(“SmartSeller: sell “+goods +” to “+clientName+”…”);
return 100;
}

public void checkBill(int billId){
    if(billId == 1) throw new IllegalArgumentException("iae Exception");
    else throw new RuntimeException("re Exception");
}

}
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beans.xml配置檔案:

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<?xml version="1.0" encoding="UTF-8" ?>


<aop:aspectj-autoproxy proxy-target-class=“true”/>


複製程式碼 1、切點符合運算 使用切點符合運算子,我們將擁有強大而靈活的切點表達能力。 TestAspect:切點符合運算定義切面 複製程式碼 package com.yyq.aspectJAdvanced; import org.aspectj.lang.annotation.After; import org.aspectj.lang.annotation.AfterReturning; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before;

@Aspect
public class TestAspect {
//與非運算
@Before("!target(com.yyq.aspectJAdvanced.NaiveWaiter) && execution(* serveTo(…))")
public void notServeInNaiveWaiter(){
System.out.println("–notServeInNaiveWaiter() executed!–");
}
//與運算
@After(“within(com.yyq.aspectJAdvanced.) && execution( greetTo(…))”)
public void greetToFun(){
System.out.println("–greetToFun() executed!–");
}
//或運算
@AfterReturning(“target(com.yyq.aspectJAdvanced.Waiter) || target(com.yyq.aspectJAdvanced.Seller)”)
public void waiterOrSeller(){
System.out.println("–waiterOrSeller() executed!–");
}
}
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測試方法:

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@Test
public void pointAspectJTest() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter naiveWaiter = (Waiter) ctx.getBean(“naiveWaiter”);
Waiter naughtyWaiter = (Waiter) ctx.getBean(“naughtyWaiter”);
naiveWaiter.greetTo(“John”);
naiveWaiter.serveTo(“John”);
naughtyWaiter.greetTo(“Tom”);
naughtyWaiter.serveTo(“Tom”);
}
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輸出結果:
NaiveWaiter:greet to John…
–greetToFun() executed!–
–waiterOrSeller() executed!–
NaiveWaiter:serving to John…
–waiterOrSeller() executed!–
NaughtyWaiter:greet to Tom…
–greetToFun() executed!–
–waiterOrSeller() executed!–
–notServeInNaiveWaiter() executed!–
NaughtyWaiter:serving Tom…
–waiterOrSeller() executed!–

2、命名切點
切點直接宣告在增強方法處被稱為匿名切點,匿名切點只能在宣告處使用。如果希望在其他地方重用一個切點,我們可以通過@Pointcut註解以及切面類方法對切點進行命名。
TestNamePointcut:命名切點類
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package com.yyq.aspectJAdvanced;
import org.aspectj.lang.annotation.Pointcut;
public class TestNamePointcut {
//通過註解方法inPackage()對該切點進行命名,方法可視域修飾符為private,表明該命名切點只能在本切面類中使用
@Pointcut(“within(com.yyq.aspectJAdvaned.)")
private void inPackage(){}
@Pointcut("execution(
greetTo(…))”)
protected void greetTo(){}
@Pointcut(“inPackage() and greetTo()”)
public void inPkgGreetTo(){}
}
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TestAspect2:切面實現類

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package com.yyq.aspectJAdvanced;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
@Aspect
public class TestAspect2 {
@Before(“TestNamePointcut.inPkgGreetTo()”)
public void pkgGreetTo(){
System.out.println("–pkgGreetTo() executed!–");
}
@Before(“target(com.yyq.aspectJAdvanced.NaiveWaiter) || TestNamePointcut.inPkgGreetTo()”)
public void pkgGreetToNotnaiveWaiter(){
System.out.println("–pkgGreetToNotnaiveWaiter() executed!–");
}
}
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測試方法:

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@Test
public void pointAspectJTest2() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
NaiveWaiter naiveWaiter = (NaiveWaiter) ctx.getBean(“naiveWaiter”);
naiveWaiter.smile(“Andy”, 2);
}
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輸出結果:
–pkgGreetToNotnaiveWaiter() executed!–
NaiveWaiter:smile to Andy2times…

3、增強織入的順序
一個連線點可以同時匹配多個切點,切點對應的增強在連線點上的織入順序的安排主要有以下3種情況:
1)如果增強在同一個切面類中宣告,則依照增強在切面類中定義的順序進行織入;
2)如何增強位於不同的切面類中,且這些切面類都實現了org.springframework.core.Order介面,則由介面方法的順序號決定(順序號小的先織入);
3)如果增強位於不同的切面類中,且這些切面類沒有實現org.springframework.core.Order介面,織入的順序是不確定的。

4、訪問連線點資訊
AspectJ使用org.aspectj.lang.JoinPoint介面表示目標類連線點物件,如果是環繞增強時,使用org.aspectj.lang.ProceedingJoinPoint表示連線點物件,該類是JoinPoint的子介面,任何一個增強方法都可以通過將第一個入參宣告為JoinPoint訪問到連線點上下文的資訊。
TestAspect3:切面實現類
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@Aspect
public class TestAspect3 {
@Around(“execution(* greetTo(…)) && target(com.yyq.aspectJAdvanced.NaiveWaiter)”)
public void joinPointAccess(ProceedingJoinPoint pjp) throws Throwable {
System.out.println("—joinPointAccess—");
System.out.println(“args[0]:” + pjp.getArgs()[0]);
System.out.println(“signature:” + pjp.getTarget().getClass());
pjp.proceed();
System.out.println("—joinPointAccess—");
}
}
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測試方法:

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@Test
public void pointAspectJTest3() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter naiveWaiter = (Waiter) ctx.getBean(“naiveWaiter”);
naiveWaiter.greetTo(“Andy”);
}
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輸出結果:
—joinPointAccess—
args[0]:Andy
signature:class com.yyq.aspectJAdvanced.NaiveWaiter
NaiveWaiter:greet to Andy…
—joinPointAccess—

5、繫結連線點方法入參
args()用於繫結連線點方法的入參;@annotation()用於繫結連線點方法的註解物件;而@args()用於繫結連線點方法入參的註解。
TestAspect4:切面實現類
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@Aspect
public class TestAspect4 {
@Before(“target(com.yyq.aspectJAdvanced.NaiveWaiter) && args(name,num,…)”)
public void bindJoinPointParams(int num, String name) {
System.out.println("—bindJoinPointParams—");
System.out.println(“name:” + name);
System.out.println(“num:” + num);
System.out.println("—bindJoinPointParams—");
}
}
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測試方法:

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@Test
public void pointAspectJTest4() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
NaiveWaiter naiveWaiter = (NaiveWaiter) ctx.getBean(“naiveWaiter”);
naiveWaiter.smile(“Andy”, 3);
}
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輸出結果:
—bindJoinPointParams—
name:Andy
num:3
—bindJoinPointParams—
NaiveWaiter:smile to Andy 3 times…

6、繫結代理物件
使用this()或target()可繫結被代理物件例項,在通過類例項名繫結物件時,還依然具有原來連線點匹配的功能,只不過類名是通過增強方法中同名入參的型別間接決定罷了。
TestAspect5:切面實現類
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@Aspect
public class TestAspect5 {
@Before(“this(waiter)”)
public void bindProxyObj(Waiter waiter){
System.out.println("—bindProxyObj—");
System.out.println(waiter.getClass().getName());
System.out.println("—bindProxyObj—");
}
}
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測試方法:

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@Test
public void pointAspectJTest5() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter waiter = (Waiter) ctx.getBean(“naiveWaiter”);
waiter.greetTo(“Yang”);
}
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輸出結果:
—bindProxyObj—
com.yyq.aspectJAdvanced.NaiveWaiter E n h a n c e r B y C G L I B EnhancerByCGLIB fefafe52
—bindProxyObj—
NaiveWaiter:greet to Yang…

7、繫結類註解物件
@within()和@target()函式可以將目標類的註解物件繫結到增強方法中,我們通過@within()演示註解繫結的操作。
TestAspect6:切面測試類
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@Aspect
public class TestAspect6 {
@Before("@within(m)")
public void bindTypeAnnoObject(Monitorable m) {
System.out.println("—bindTypeAnnoObject—");
System.out.println(m.getClass().getName());
System.out.println("—bindTypeAnnoObject—");
}
}
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測試方法:

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@Test
public void pointAspectJTest6() {
String configPath = “com\yyq\aspectJAdvanced\beans.xml”;
ApplicationContext ctx = new ClassPathXmlApplicationContext(configPath);
Waiter waiter = (Waiter) ctx.getBean(“naiveWaiter2”);
((NaiveWaiter2)waiter).greetTo(“Yang”);
}
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輸出結果:
—bindTypeAnnoObject—
$Proxy4
—bindTypeAnnoObject—
NaiveWaiter:greet to Yang…

8、繫結返回值
在後置增強中,我們可以通過returning繫結連線點方法的返回值。
TestAspect7:切面實