1. 程式人生 > >在eclipse建立spring+springMVC+Mybatis的專案

在eclipse建立spring+springMVC+Mybatis的專案

現在使用maven構建的專案會讓我們省去jar包的匯入和每個工程都匯入數量較多jar包的苦惱,特別是在團隊開發中,我們應該保證我們使用的jar包的版本一致,使用maven之後,我們僅需要保證pom.xml檔案一致。他會自己按<dependency>節點中配置的資訊找到相應的jar包。

下面是自己學習之後構建Spring+SpringMVC+Mybatis的工程構建過程:

1.首先,我們應該確保eclipse中有maven外掛並正常使用;建立一個maven的webapp專案:

可以看見,這裡的jsp檔案有錯誤,這是因為開始時專案中沒有匯入javax.servlet.http.HttpServlet所在包導致的。我們build path進包即可,在eclipse建立tomcat的服務之後步驟如下

abcd

2.現在一個maven工程建立好了,之後就是pom.xml和spring的配置檔案的編寫了:

pom.xml的程式碼:當然,需要什麼包到http://mvnrepository.com/去搜索得到<dependency>放到pom.xml檔案中即可;

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.ys.test001</groupId>
	<artifactId>Test001</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>Test001 Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.7</version>
			<scope>test</scope>
		</dependency>
		<!-- spring-mvc包 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>4.2.0.RELEASE</version>
		</dependency>
		<!-- jsp顯示資料需要的jar包 -->
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
		<!--日誌 -->
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.17</version>
		</dependency>
		<dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-core</artifactId>
			<version>2.0</version>
		</dependency>
		<dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-api</artifactId>
			<version>2.0</version>
		</dependency>
		<!--spring4.0以上json和java物件的轉換jackson包 spring4.0以上需要jackson2.6版本 -->
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-core</artifactId>
			<version>2.6.1</version>
		</dependency>
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.6.1</version>
		</dependency>
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-annotations</artifactId>
			<version>2.6.1</version>
		</dependency>
		<!--mybatis的包 -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.2.8</version>
		</dependency>
		<!--mybatis和spring整合包 -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>1.2.2</version>
		</dependency>
		<!-- 我使用的連線資料的jar包 -->
		<dependency>
			<groupId>commons-dbcp</groupId>
			<artifactId>commons-dbcp</artifactId>
			<version>1.4</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>4.2.0.RELEASE</version>
		</dependency>
		<!--spring事務tx包的引用 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>4.2.0.RELEASE</version>
		</dependency>

		<!--資料庫jar包 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.18</version>
		</dependency>
		<dependency>
			<groupId>commons-io</groupId>
			<artifactId>commons-io</artifactId>
			<version>2.2</version>
		</dependency>
	</dependencies>
	<build>
		<finalName>Test001</finalName>
	</build>
</project>
3.spring和Mybatis的配置檔案:

為了方便管理,我們在resources檔案加入資料庫連線資訊:db.properties 並建立config/spring 和 config/mybatis資料夾,存放各自的配置檔案:

log4j.properties:

</pre><pre name="code" class="java"># Global logging configuration
log4j.rootLogger=DEBUG, stdout
# MyBatis logging configuration...
log4j.logger.org.mybatis.example.BlogMapper=TRACE
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

我的db.properties檔案資訊:

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test
jdbc.username=root
jdbc.password=root

spring-dao.xml檔案:
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
		http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
		http://www.springframework.org/schema/mvc 
		http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
		http://www.springframework.org/schema/context 
		http://www.springframework.org/schema/context/spring-context-3.2.xsd 
		http://www.springframework.org/schema/aop 
		http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
		http://www.springframework.org/schema/tx 
		http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
    <!--配置資料庫連線屬性-->
    <!--配置資料庫連線屬性載入db.properties的資料庫連線資訊檔案 這裡配置有很多學問,需要我以後學習-->
    <context:property-placeholder location="classpath:db.properties"></context:property-placeholder>
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="maxActive" value="30"/>
        <property name="maxIdle" value="5"/>
    </bean>

    <!-- 讓spring管理sqlsessionfactory 使用mybatis和spring整合包中的 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--注入資料庫連線物件-->
        <property name="dataSource" ref="dataSource"/>
        <!--載入mybatis配置檔案 這裡mybatis配置檔案的工作都在spring中配置了所以mybatis只是配置別名就可以-->
        <property name="configLocation" value="classpath:/config/mybatis/mybatisconfig.xml"/>
    </bean>
    
    <!-- mapper掃描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 掃描的包,如果要掃描多個,中間用,隔開 -->
        <property name="basePackage" value="com.ys.mybatis.mapper"></property>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>

</beans>

spring-mvc.xml:

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
		http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
		http://www.springframework.org/schema/mvc 
		http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
		http://www.springframework.org/schema/context 
		http://www.springframework.org/schema/context/spring-context-3.2.xsd 
		http://www.springframework.org/schema/aop 
		http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
		http://www.springframework.org/schema/tx 
		http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
	<!--開啟註解 -->
	<mvc:annotation-driven></mvc:annotation-driven>
	<!--可以訪問靜態檔案 -->
	<mvc:default-servlet-handler></mvc:default-servlet-handler>
	<!--配置掃描包 -->
	<context:component-scan base-package="com.ys.controller"></context:component-scan>
	<!-- service包 -->
	<context:component-scan base-package="com.ys.serviceimpl"></context:component-scan>
	
	<!--配置檢視解析器 -->
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="viewClass"
			value="org.springframework.web.servlet.view.JstlView" />
		<property name="prefix" value="/WEB-INF/" />
		<property name="suffix" value=".jsp" />
	</bean>
<span style="white-space:pre">	</span><span style="font-family: Arial, Helvetica, sans-serif;"><!--</span><span style="font-family: Arial, Helvetica, sans-serif;">以後可能需要檔案上傳和攔截器</span><span style="font-family: Arial, Helvetica, sans-serif;">--></span><span style="white-space:pre">
</span>
</beans>

mybatisconfig.xml:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <typeAliases>
        <!-- 掃描別名 -->
        <package name="com.ys.po"/>
    </typeAliases>
<!-- 載入我們的Sql語句的xml檔案 -->

<!-- 使用自動掃描器時,mapper.xml檔案如果和mapper.java介面在一個目錄則此處不用定義mappers -->
</configuration>
4.最後是web.xml載入我們上面的配置檔案

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://xmlns.jcp.org/xml/ns/javaee"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
	id="WebApp_ID" version="3.1">

	<!-- 載入spring配置檔案 -->
	<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:config/spring/spring-*.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<!-- 設定url匹配模式 -->
	<servlet-mapping>
		<servlet-name>springmvc</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	
	<!-- 解決post亂碼 -->
	<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>
		<init-param>
			<param-name>forceEncoding</param-name>
			<param-value>true</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>encodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>

5.現在是包和mapper.xml和controller和service編寫:

UserInfo.java:

public class UserInfo {
	private int id;
	private String username;
	private String password;<span style="font-family:Arial, Helvetica, sans-serif;"> 省略了get set方法</span>
UserInfoService.java:
public interface UserInfoService {
	public UserInfo getInfoById(int id);
}
UserInfoServiceImpl.java:
@Service
public class UserInfoServiceImpl implements UserInfoService {

	@Autowired
	private MyPoDaoService daoService;

	public UserInfo getInfoById(int id) {
		// TODO Auto-generated method stub
		if(id!=0&&id<3){
			return daoService.GetUserInfo(id);
		}else{
			return null;
			
		}
	}<span style="color:#ff0000;">
</span>
MyPoDaoService.java:
package com.ys.mybatis.mapper;

import com.ys.po.UserInfo;
public interface MyPoDaoService {
	public UserInfo GetUserInfo(int id);
}
MyPoDaoService.xml:
<?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">
<mapper namespace="com.ys.mybatis.mapper.MyPoDaoService">
	<select id="GetUserInfo" resultType="com.ys.po.UserInfo">
	    select * from userinfo where id = #{id}
	</select>
	
</mapper>

HelloController.java:

@Controller
public class HelloController {
	@Autowired
	private UserInfoServiceImpl userInfoSeriverImpl;
	@RequestMapping("/hello")
	public String sayHello(HttpServletRequest request, HttpServletResponse response){
		request.setAttribute("say", "測試sayHello");
		UserInfo infoById = userInfoSeriverImpl.getInfoById(1);
		if(infoById!=null){
		request.setAttribute("infoById", infoById);
		System.out.println(infoById.toString());
		}
		request.setAttribute("say", "test Say Hello");
		return "Hello";
	}
	
}
Hello.jsp:
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	<h1>say Hello</h1>
	<h2>${say}</h2>
<c:if test="${infoById!=null}">
<h1>您好:${infoById.username}</h1>
</c:if>

<c:if test="${infoById==null }">
<h1>對不起,沒有取得使用者名稱</h1>
</c:if>

</body>
</html>
最後的工程結構如下:



資料庫UserInfo表內容:



執行結果:


現在我們就可以在此基礎上增加我們需要的功能和頁面了。