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SpringMVC+Spring+Mybatis整合，使用druid连接池，声明式事务，maven配置
一直对springmvc和mybatis挺怀念的，最近想自己再搭建下框架，然后写点什么。
暂时没有整合缓存，druid也没有做ip地址的过滤。Spring的AOP简单配置了下，也还没具体弄，不知道能不能用，log也不知道能不能用，`(*∩_∩*)′哈哈，有点不负责任......
直接上代码：
使用的eclipse和eclipse自带的maven，参考了网上的资料，有些代码是拷贝的，不过都自己测试过了。嗯，可以跑起来...
先上项目结构：
新建maven项目，选择web，然后配置pom：
<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>ACE</groupId> <artifactId>Test</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>Test Maven Webapp</name> <url>http://maven.apache.org</url> <properties> <org.springframework.version>4.0.0.M2</org.springframework.version> <org.slf4j.version>1.6.1</org.slf4j.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <!-- servlet --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!--mysql --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.26</version> </dependency> <!-- spring --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${org.springframework.version}</version> <exclusions> <exclusion> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-instrument</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-instrument-tomcat</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jms</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-oxm</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc-portlet</artifactId> <version>${org.springframework.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-websocket</artifactId> <version>${org.springframework.version}</version> </dependency> <!--mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.2.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.2.0</version> </dependency> <!-- Logging --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${org.slf4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>${org.slf4j.version}</version> <scope>runtime</scope> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.16</version> <scope>runtime</scope> </dependency> <!-- druid --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.0.7</version> </dependency> </dependencies> <!-- 仓库 --> <repositories> <!-- For Hibernate Validator --> <repository> <id>org.jboss.repository.release</id> <name>JBoss Maven Release Repository</name> <url>https://repository.jboss.org/nexus/content/repositories/releases</url> <snapshots> <enabled>false</enabled> </snapshots> </repository> <repository> <id>org.springsource.maven.snapshot</id> <name>SpringSource Maven Central-compatible Snapshot Repository</name> <url>http://maven.springframework.org/snapshot</url> <snapshots> <updatePolicy>daily</updatePolicy> </snapshots> </repository> <repository> <id>spring-milestone</id> <name>Spring Maven MILESTONE Repository</name> <url>http://maven.springframework.org/milestone</url> </repository> <repository> <id>standard repo</id> <url>http://repo1.maven.org/maven2</url> </repository> <repository> <id>mirror repo</id> <url>http://mirrors.ibiblio.org/pub/mirrors/maven2</url> </repository> <repository> <id>com.springsource.repository.bundles.release</id> <name>SpringSource Enterprise Bundle Repository - SpringSource Bundle Releases</name> <url>http://repository.springsource.com/maven/bundles/release</url> </repository> <repository> <id>com.springsource.repository.bundles.external</id> <name>SpringSource Enterprise Bundle Repository - External Bundle Releases</name> <url>http://repository.springsource.com/maven/bundles/external</url> </repository> <repository> <id>sqlfire-release</id> <url>http://dist.gemstone.com/maven/release</url> </repository> </repositories> <build> <finalName>Test</finalName> </build></project>
web.xml:
<?xml version="1.0" encoding="UTF-8"?><web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"> <!-- filter --> <filter> <filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- listener --> <listener> <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class> </listener> <!-- servlet --> <servlet> <servlet-name>Test</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> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>Test</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <error-page> <error-code>404</error-code> <location>/error/404.jsp</location> </error-page> <!-- druid --> <servlet> <servlet-name>DruidStatView</servlet-name> <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>DruidStatView</servlet-name> <url-pattern>/druid/*</url-pattern> </servlet-mapping></web-app>
applicationContext.xml:
<?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" 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 "> <!-- spring 自动扫描组件 --> <context:component-scan base-package="com.hi.test"/> <import resource="spring-mvc.xml"/> <import resource="spring-database.xml"/> <import resource="spring-aop.xml"/> <bean id="log4jInitialization" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean"> <property name="targetClass" value="org.springframework.util.Log4jConfigurer" /> <property name="targetMethod" value="initLogging" /> <property name="arguments"> <list> <value>classpath:log4j.xml</value> </list> </property> </bean></beans>
spring-mvc.xml:
<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd "> <mvc:annotation-driven /> <mvc:default-servlet-handler /> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> <property name="prefix" value="WEB-INF/views/"/> <property name="suffix" value=".jsp"/> </bean></beans>
spring-aop.xml:
<?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:aop="http://www.springframework.org/schema/aop" 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/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd "> <!-- spring aop --> <aop:aspectj-autoproxy /></beans>
spring-database.xml:
<?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: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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd "> <!-- 数据源 org.apache.commons.dbcp.BasicDataSource com.alibaba.druid.pool.DruidDataSource --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost:3306/mydb" /> <property name="username" value="root" /> <property name="password" value="123456" /> <!-- 初始化连接大小 --> <property name="initialSize" value="0" /> <!-- 连接池最大使用连接数量 --> <property name="maxActive" value="20" /> <!-- 连接池最小空闲 --> <property name="minIdle" value="0" /> <!-- 获取连接最大等待时间 --> <property name="maxWait" value="60000" /> <property name="validationQuery"><value>SELECT 1</value></property> <property name="testOnBorrow" value="false" /> <property name="testOnReturn" value="false" /> <property name="testWhileIdle" value="true" /> <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="60000" /> <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="25200000" /> <!-- 打开removeAbandoned功能 --> <property name="removeAbandoned" value="true" /> <!-- 1800秒，也就是30分钟 --> <property name="removeAbandonedTimeout" value="1800" /> <!-- 关闭abanded连接时输出错误日志 --> <property name="logAbandoned" value="true" /> <!-- 监控数据库 --> <!-- <property name="filters" value="http://www.mamicode.com/stat" /> --> <property name="filters" value="mergeStat" /> </bean> <!-- 配置druid监控spring jdbc --> <bean id="druid-stat-interceptor" class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor"> </bean> <bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut" scope="prototype"> <property name="patterns"> <list> <value>com.hi.test.service.*</value> </list> </property> </bean> <aop:config> <aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" /> </aop:config> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 声明式事务 --> <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" /> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /><property name="configLocation" value="classpath:mybatis-config.xml"></property> </bean> <!-- 注册Mapper方式二：也可不指定特定mapper，而使用自动扫描包的方式来注册各种Mapper ，配置如下： --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="annotationClass" value="org.springframework.stereotype.Repository" /> <property name="basePackage" value="com.hi.test.mapper" /> <property name="sqlSessionFactory" ref="sqlSessionFactory" /> </bean></beans>
mybatis-config.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> <mappers> <mapper resource="com/hi/test/mapper/UserMapper.xml"/> </mappers> </configuration>
log4j.xml:
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE log4j:configuration PUBLIC "-//LOGGER" "log4j.dtd"><log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/"> <!-- Appenders --> <appender name="console" class="org.apache.log4j.ConsoleAppender"> <param name="Target" value="System.out" /> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%-5p: %c - %m%n" /> </layout> </appender> <!-- 3rdparty Loggers --> <logger name="org.springframework.core"> <level value="info" /> </logger> <logger name="org.springframework.beans"> <level value="info" /> </logger> <logger name="org.springframework.context"> <level value="info" /> </logger> <logger name="org.springframework.web"> <level value="info" /> </logger> <logger name="org.mybatis"> <level value="info" /> </logger> <logger name="com.hi"> <level value="info"/> </logger> <!-- Root Logger --> <root> <priority value="warn" /> <appender-ref ref="console" /> </root> </log4j:configuration>
commons-logging.properties:
org.apache.commons.logging.Log=org.apache.commons.logging.impl.Log4JLogger
IndexController:
package com.hi.test.controller;import java.util.List;import java.util.Map;import javax.servlet.http.HttpServletRequest;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import com.hi.test.bean.User;import com.hi.test.mapper.UserMapper;import com.hi.test.service.TxTestService;@Controllerpublic class IndexController { @Autowired UserMapper userMapper; @Autowired TxTestService txTestService; @RequestMapping(value = "/index") public String index(HttpServletRequest request,Map model) { //String name=request.getParameter("name"); //model.put("name", name); User u=new User(); u.setUsername("admin"); u.setPassword("admin"); User user=userMapper.selectUser(u); model.put("user", user); return "hi"; } @RequestMapping(value = "/text") @ResponseBody public String text(HttpServletRequest request) { return "{\"what\":\"hi\"}"; } @RequestMapping(value = "/indexList") public String indexList(HttpServletRequest request,Map model) { List<User> userList=userMapper.selectUserLsit(); model.put("userList", userList); return "hiList"; } @RequestMapping(value = "/TxTest") @ResponseBody public String test(HttpServletRequest request) { txTestService.insert(); return ""; }}
User:
package com.hi.test.bean;public class User { private int id; private String username; private String password; public User(){ } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String toString(){ return "User [id = "+ id +" , username = "+ username +"]" + " , password = "+ password; } }
UserMapper:
package com.hi.test.mapper;import java.util.List;import org.springframework.stereotype.Repository;import com.hi.test.bean.User;@Repositorypublic interface UserMapper { public User selectUser(User user); public void insertUser(User user); public void updateUser(User user); public void deleteUser(int userId); public List selectUserLsit();}
UserMapper.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.hi.test.mapper.UserMapper"> <resultMap id="userList" type="com.hi.test.bean.User"> <id column="id" property="id" /> <result column="username" property="username" /> <result column="password" property="password" /> </resultMap> <select id="selectUser" parameterType="com.hi.test.bean.User" resultType="com.hi.test.bean.User"> SELECT * FROM user WHERE username=#{username} AND password=#{password} </select> <insert id="insertUser" parameterType="com.hi.test.bean.User" flushCache="true"> INSERT INTO user (id,username,password) VALUES (#{id},#{username},#{password}) </insert> <update id="updateUser" parameterType="com.hi.test.bean.User"> UPDATE user SET password=#{password} WHERE id=#{id} </update> <delete id="deleteUser" parameterType="int"> DELETE FROM user WHERE id=#{userId} </delete> <select id="selectUserLsit" resultMap="userList"> SELECT * FROM user </select> </mapper>
TxTestService:
package com.hi.test.service;import java.util.UUID;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;import com.hi.test.bean.User;import com.hi.test.mapper.UserMapper;@Transactional@Servicepublic class TxTestService { @Autowired UserMapper userMapper; public void insert() { for (int i = 0; i < 100; i++) { User u = new User(); u.setUsername(UUID.randomUUID().toString()); u.setPassword(UUID.randomUUID().toString()); userMapper.insertUser(u); } throw new RuntimeException(); } }
sql文件,navicat导出的:
/*Navicat MySQL Data TransferSource Server : MySQLSource Server Version : 50704Source Host : localhost:3306Source Database : mydbTarget Server Type : MYSQLTarget Server Version : 50704File Encoding : 65001Date: 2014-08-09 23:52:32*/SET FOREIGN_KEY_CHECKS=0;-- ------------------------------ Table structure for user-- ----------------------------DROP TABLE IF EXISTS `user`;CREATE TABLE `user` ( `id` int(11) NOT NULL AUTO_INCREMENT, `username` varchar(255) NOT NULL, `password` varchar(255) NOT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=902 DEFAULT CHARSET=utf8;-- ------------------------------ Records of user-- ----------------------------INSERT INTO `user` VALUES (‘1‘, ‘admin‘, ‘admin‘);
index.jsp：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!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>hi</body></html>
hi.jsp:
<%@ page isELIgnored="false"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!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>this is springmvc,${user.username }</body></html>
hiList.jsp:
<%@ page isELIgnored="false"%> <%@ 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><c:forEach var="user" items="${userList}">${user.username}----${user.password}<br></c:forEach></body></html>
======================================================================================
OK，代码贴完了，项目上右键，debug on server应该就能跑起来了。
几个链接可以查看效果：druid的监控信息：http://localhost:8080/Test/druid/sql.html
http://localhost:8080/Test/
http://localhost:8080/Test/text.do
http://localhost:8080/Test/indexList.do
http://localhost:8080/Test/TxTest.do
现在简单讲讲，配置文件里面有注释就不说了：
一：在配置文件添加事务的时候遇到tx标签没用，在xsi:schemaLocation这里添加两行
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
就可以了。
二：还遇到EL表达式不能用，然后
web.xml修改:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
jsp增加:
<%@ page isELIgnored="false"%>
三：还有c:forEach这种标签不能用
在JSP上增加
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
就可以了
四：spring事务这里
数据库是mysql ，然后表引擎是InnoDB
用navicat在design table---option--engine可以看到
访问http://localhost:8080/Test/TxTest.do之后会出现异常，这个异常是手动抛出的，数据库也没有插入数据。
然后将表的引擎换成MyISAM，保存
之后再访问http://localhost:8080/Test/TxTest.do，发现数据库被插入数据了。
说明：Spring的这个声明事务能使用，MyISAM不支持事务。
五：Controller里的四个方法
第一个方法是一般的测试。
第二个方法是想测试返回json的，主要是@ResponseBody标签。
第三个方法测试LIST。
第四个是测试事务的。
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