使用maven搭建一個簡單的SSM框架
學習了ssm框架後,一直想要自己親自搭建一個,最近嘗試了一下,效果還行,算是一個微型的ssm框架吧。介紹一下,我使用的IDE是idea。
首先,建立一個maven的web工程,如下:
然後點選next,新增groupId,artifactId和version,這個隨便起不過groupId表示你的包名,artifactId表示你的專案名,如下:
然後一路next,這裡要注意一下,可能有的小夥伴下載maven專案奇慢無比,這是由於如果你沒新增任何配置的話,你的maven依賴預設是從中央倉庫下載的,而中央倉庫在國外,所以慢是可以理解的,那麼,有什麼可以解決的呢?有,那就是在你的"settings.xml"檔案中新增阿里巴巴的映象即可:如下:
<mirror>
<id>alimaven</id>
<name>aliyun maven</name>
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
<mirrorOf>central</mirrorOf>
</mirror>
建立好的maven目錄結構如下:
但是我們需要把它配置成標準的maven專案機構,如下:
這裡,我們還需要將java標記為原始檔,resouces標記為配置檔案,如下所示:
然後在pom.xml檔案中引入相關的spring的依賴,如下:
<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.7</maven.compiler.source> <maven.compiler.target>1.7</maven.compiler.target> <spring.version>5.0.3.RELEASE</spring.version> <mybatis.version>3.4.4</mybatis.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <!-- 第一部分:Spring 配置--> <!-- Spring core --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <!-- Spring DAO --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <!-- Spring mvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <!-- 第二部分:Servlet web --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>1.1.2</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.9.4</version> </dependency> <!-- 第三部分:資料庫和mybatis --> <!-- 資料庫 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.38</version> </dependency> <!-- 資料庫連線池 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <!-- MyBatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <!-- mybatis-spring整合包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version> </dependency> <!-- 第四部分:日誌 --> <!-- 實現slf4j介面並整合 --> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>1.1.1</version> </dependency> </dependencies>
然後在resources配置中建立如下xml檔案:
這裡的applicationContext-dataSource.xml檔案中新增和資料庫相關的配置資訊,如下:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 配置資料庫相關引數properties的屬性:${url} -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 資料庫連線池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<property name="maxPoolSize" value="${c3p0.maxPoolSize}"/>
<property name="minPoolSize" value="${c3p0.minPoolSize}"/>
<property name="autoCommitOnClose" value="${c3p0.autoCommitOnClose}"/>
<property name="checkoutTimeout" value="${c3p0.checkoutTimeout}"/>
<property name="acquireRetryAttempts" value="${c3p0.acquireRetryAttempts}"/>
</bean>
<!-- 配置SqlSessionFactory物件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 注入資料庫連線池 -->
<property name="dataSource" ref="dataSource"/>
<!-- 掃描model包 使用別名 -->
<property name="typeAliasesPackage" value="com.Jevin.domain"/>
<!-- 掃描sql配置檔案:mapper需要的xml檔案 -->
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
<property name="configurationProperties">
<props>
<prop key="mapUnderscoreToCamelCase">true</prop>
</props>
</property>
</bean>
<!-- 配置掃描Dao介面包,動態實現Dao介面,注入到spring容器中 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 注入sqlSessionFactory -->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<!-- 給出需要掃描Dao介面包 -->
<property name="basePackage" value="com.Jevin.dao"/>
</bean>
<!-- 配置事務管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!-- 注入資料庫連線池 -->
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 配置基於註解的宣告式事務 -->
<tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>
</beans>
那麼,就需要配置連線資料庫的配置了,我們放在jdbc.properties中,如下:
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/bjpowernode?useUnicode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=123456
#最大連線數
c3p0.maxPoolSize=30000
#最小連線數
c3p0.minPoolSize=10
#關閉連線後不自動commit
c3p0.autoCommitOnClose=false
#獲取連線超時時間
c3p0.checkoutTimeout=10000
#當獲取連線失敗重試次數
c3p0.acquireRetryAttempts=2
其中,這裡:
是你自己的資料庫庫名,自己根據自己的情況酌情而定。
然後在applicationContext-springMVC,xml中配置有關springMVC相關的配置資訊:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 配置註解驅動 -->
<mvc:annotation-driven />
<!-- 配置檢視解析器 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
再然後,在applicationContext.xml總配置檔案中引入其他的配置檔案:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 載入系統配置檔案 -->
<context:property-placeholder location="classpath:*.properties" />
<!-- 掃描註解 -->
<context:component-scan base-package="com.Jevin" />
<!-- 匯入資料相關配置 -->
<import resource="applicationContext-dataSource.xml" />
<import resource="applicationContext-springMVC.xml" />
</beans>
其中mapper中的emp.xml中是寫sql的如下:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!-- 設定為IUserDao介面方法提供sql語句配置 -->
<mapper namespace="com.Jevin.dao.EmpDao">
<resultMap id="BaseResultMap" type="com.Jevin.domain.Emp">
<id column="empno" jdbcType="INTEGER" property="empno" />
<result column="ename" jdbcType="VARCHAR" property="ename" />
<result column="job" jdbcType="VARCHAR" property="job" />
<result column="mgr" jdbcType="INTEGER" property="mgr" />
<result column="hiredate" jdbcType="DATE" property="hiredate" />
<result column="sal" jdbcType="DOUBLE" property="sal" />
<result column="comm" jdbcType="DOUBLE" property="comm" />
<result column="deptno" jdbcType="INTEGER" property="deptno" />
</resultMap>
<select id="getEmp" resultMap="BaseResultMap">
select * from emp;
</select>
</mapper>
然後在web.xml檔案中配置一些servlet和其他資訊:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext*.xml</param-value>
<!-- <param-value>classpath:bean/applicationContext.xml</param-value>-->
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext*.xml</param-value>
</context-param>
<!-- 編碼過濾器 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- spring監聽器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 防止spring記憶體溢位監聽器,比如quartz -->
<listener>
<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
</listener>
<session-config>
<session-timeout>30</session-timeout>
</session-config>
</web-app>
再然後是原始檔目錄如下:
至於原始檔中的內容如下:
首先是domain層:
package com.Jevin.domain;
import java.util.Date;
public class Emp {
private Integer empno;
private String ename;
private String job;
private Integer mgr;
private Date hiredate;
private Double sal;
private Double comm;
private Integer deptno;
public Emp(){};
public Emp(Integer empno, String ename, String job, Integer mgr, Date hiredate, Double sal, Double comm, Integer deptno) {
this.empno = empno;
this.ename = ename;
this.job = job;
this.mgr = mgr;
this.hiredate = hiredate;
this.sal = sal;
this.comm = comm;
this.deptno = deptno;
}
public Integer getEmpno() {
return empno;
}
public void setEmpno(Integer empno) {
this.empno = empno;
}
public String getEname() {
return ename;
}
public void setEname(String ename) {
this.ename = ename;
}
public String getJob() {
return job;
}
public void setJob(String job) {
this.job = job;
}
public Integer getMgr() {
return mgr;
}
public void setMgr(Integer mgr) {
this.mgr = mgr;
}
public Date getHiredate() {
return hiredate;
}
public void setHiredate(Date hiredate) {
this.hiredate = hiredate;
}
public Double getSal() {
return sal;
}
public void setSal(Double sal) {
this.sal = sal;
}
public Double getComm() {
return comm;
}
public void setComm(Double comm) {
this.comm = comm;
}
public Integer getDeptno() {
return deptno;
}
public void setDeptno(Integer deptno) {
this.deptno = deptno;
}
@Override
public String toString() {
return "Emp{" +
"empno=" + empno +
", ename='" + ename + '\'' +
", job='" + job + '\'' +
", mgr=" + mgr +
", hiredate=" + hiredate +
", sal=" + sal +
", comm=" + comm +
", deptno=" + deptno +
'}';
}
}
然後是dao層:
package com.Jevin.dao;
import com.Jevin.domain.Emp;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository
public interface EmpDao {
public List<Emp> getEmp();
}
然後是service層:
package com.Jevin.service;
import com.Jevin.domain.Emp;
import java.util.List;
public interface EmpService {
public List<Emp> getEmp();
}
package com.Jevin.service.inpl;
import com.Jevin.dao.EmpDao;
import com.Jevin.domain.Emp;
import com.Jevin.service.EmpService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class EmpServiceImpl implements EmpService {
@Autowired
private EmpDao empDao;
@Override
public List<Emp> getEmp() {
return empDao.getEmp();
}
}
最後第controller層:
package com.Jevin.controller;
import com.Jevin.service.EmpService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/emp")
public class EmpController {
@Autowired
private EmpService empService;
@RequestMapping(value="/query")
public Object getEmp(){
return empService.getEmp();
}
}
好了,至此程式碼已經都寫完了,接下來配置tomcat容器:
這裡,還需要將你的專案打包成jar包,或者是war包,儘管idea已經替你打好了,但是你還需要學會自己打包:如下:
然後就是將專案部署到tomcat中去:
好了,至此專案已經結束,可以啟動tomcat跑專案了:
瀏覽器中有如上的json資訊,表明配置成功了!