Spring+Spring MVC+MyBatis整合
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1.1设计思想
使用JSP作为展示层,Spring作为控制器,用户发送请求时,使用Spring MVC找到对应的处理请求的Action,经过业务逻辑层到持久层(MyBatis)与数据库交互,最后返回给用户
1.2开发环境
操作系统:Window 7
IDE工具:Eclipse 4.4.1
服务器:Tomcat 7.0
数据库:MySQL 5.5.23
应用框架:Spring 3.2.0 +MyBatis 3.1.1
前端技术:JSP + JQuery1.7.2
1.3系统模块介绍
DAO层:由MyBatis作为DAO层,负责与数据间的交互
Sevice层:业务处理层,由Spring负责,事务管控都在此层处理,
Web(Controller)层:控制层,由Spring MVC作支持,负责响应用户请求,并找到对应JSP,将结果返回给客户端
Resource层:
config:主要存放配置文件,主要文件如下
Ø applicationContext.xml Spring配置文件,数据库连接池,AOP事务控制都在此文件中配置,需要在web.xml文件中配置此文件,服务器启动时,自动加载Spring相关信息
Ø mvc-dispatcher-servlet.xml SpringMVC配置文件,自动扫描Controller,Service,模型视图的解析都在此文件中配置,需要在web.xml文件中配置此文件,服务器启动时,自动启用Spring MVC
Ø jdbc.properties 数据库连接,用户名,密码都在此文件中配置,此文件需要在applicationContext.xml中配置
Ø log4j.properties 日志配置文件,需要在web.xml文件中配置
1.4开发示例
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" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.0.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"><!-- 引入属性文件 --><context:property-placeholder location="classpath:config/jdbc.properties" /><!-- 配置数据源 --><bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"><property name="url" value="${jdbc_url}" /><property name="username" value="${jdbc_username}" /><property name="password" value="${jdbc_password}" /><!-- 初始化连接大小 --><property name="initialSize" value="0" /><!-- 连接池最大使用连接数量 --><property name="maxActive" value="20" /><!-- 连接池最大空闲 --><property name="maxIdle" value="20" /><!-- 连接池最小空闲 --><property name="minIdle" value="0" /><!-- 获取连接最大等待时间 --><property name="maxWait" value="60000" /><!-- <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="33" /> --><property name="validationQuery" value="${validationQuery}" /><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="stat" /> --><property name="filters" value="mergeStat" /></bean><!-- myBatis文件 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource" /><!-- 自动扫描entity目录, 省掉Configuration.xml里的手工配置 --><property name="mapperLocations" value="classpath:mapper/*/*.xml" /></bean><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="com.weixin.dao" /><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /></bean><!-- 配置事务管理器 --><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource" /></bean><!-- 拦截器方式配置事物 --><tx:advice id="transactionAdvice" transaction-manager="transactionManager"><tx:attributes><tx:method name="add*" propagation="REQUIRED" /><tx:method name="append*" propagation="REQUIRED" /><tx:method name="insert*" propagation="REQUIRED" /><tx:method name="save*" propagation="REQUIRED" /><tx:method name="update*" propagation="REQUIRED" /><tx:method name="modify*" propagation="REQUIRED" /><tx:method name="edit*" propagation="REQUIRED" /><tx:method name="delete*" propagation="REQUIRED" /><tx:method name="remove*" propagation="REQUIRED" /><tx:method name="repair" propagation="REQUIRED" /><tx:method name="delAndRepair" propagation="REQUIRED" /><tx:method name="get*" propagation="SUPPORTS" /><tx:method name="find*" propagation="SUPPORTS" /><tx:method name="load*" propagation="SUPPORTS" /><tx:method name="search*" propagation="SUPPORTS" /><tx:method name="datagrid*" propagation="SUPPORTS" /><tx:method name="*" propagation="SUPPORTS" /></tx:attributes></tx:advice><aop:config><aop:pointcut id="transactionPointcut" expression="execution(* com.weixin.service..*Impl.*(..))" /><aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" /></aop:config></beans>
mvc-dispatcher-servlet.xml
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"><!-- 自动扫描controller包下的所有类,使其认为spring mvc的控制器 --><context:component-scan base-package="com.weixin.web.controller" /><context:component-scan base-package="com.weixin.service..*" /><mvc:annotation-driven /><!-- 对模型视图名称的解析,即在模型视图名称添加前后缀 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" ><property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> <property name="contentType" value="text/html;charset=utf-8"/> <property name="prefix" value="/jsp/"/> <property name="suffix" value=".jsp"/></bean></beans>
jdbc.properties
validationQuery=SELECT 1 FROM DUALjdbc_url=jdbc:mysql://localhost:3306/bigmouth?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNulljdbc_username=rootjdbc_password=123456
log4j.properties
### set log levels ### log4j.rootLogger = debug , stdout,D### output to the console ###log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%t] [%c] [%p] - %m%n ### Output to the log file ####log4j.appender.D = org.apache.log4j.DailyRollingFileAppender#log4j.appender.D.File = D:/logs/logs.log#log4j.appender.D.File =/usr/local/java/apache-tomcat-7.0.62/logs/logs.log#log4j.appender.D.Append = true#log4j.appender.D.Threshold = INFO#log4j.appender.D.datePattern='.'yyyy-MM-dd#log4j.appender.D.layout = org.apache.log4j.PatternLayout#log4j.appender.D.layout.ConversionPattern = %d{yyyy-MM-dd HH:mm:ss} [%t] [%c] [%p] - %m%n
1. 在/com/weixin/model/user/目录下创建User对象,代码如下
package com.weixin.model.user;
public class User {
private StringuserId;
private StringuserName;
private Stringpassword;
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId =userId;
}
public String getUserName() {
returnuserName;
}
public void setUserName(String userName) {
this.userName =userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password =password;
}
}
2. 在/resource/mapper/user/目录下创建操作用户的配置文件UserMapper.xml,此文件属于MyBatis操作数据库的文件,用户的增删改查SQl都在此文件中配置,内容如下
<?xmlversion="1.0"encoding="UTF-8"?>
<!DOCTYPEmapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mappernamespace="com.weixin.dao.user.IUserDao">
<resultMapid="user"type="com.weixin.model.user.User">
<resultcolumn="user_id"property="userId"jdbcType="VARCHAR"/>
<resultcolumn="user_name"property="userName"jdbcType="VARCHAR"/>
<resultcolumn="password"property="password"jdbcType="VARCHAR"/>
</resultMap>
<selectid="selectUserNameById"parameterType="Integer"
resultType="String">
SELECT t.user_name
FROM user_t t
WHERE t.user_id = #{userId}
</select>
<selectid="selectAllUser"resultMap="user">
SELECT
t.user_name,t.password FROM user_t t
</select>
<updateid="updateUser"parameterType="com.weixin.model.user.User">
update user_t t set
t.user_name = #{userName}
where t.user_id = #{userId}
</update>
<insertid="addUser"parameterType="com.weixin.model.user.User"
useGeneratedKeys="true"keyProperty="userId">
insert into
user_t(user_name,password)
values(#{userName},#{password})
</insert>
<deleteid="deleteUserByUserId"parameterType="Integer">
delete from user_t where user_id = #{userId}
</delete>
</mapper>
注意:需要指定namespace,value值是对应DAO文件的全限定名
3. 在/com/weixin/dao/user/目录下创建IUserDao.java文件,此文件提供对用户增删改查的对应接口,接口名必须与UserMapper.xml文件中的id值一一对应,内容如下
package com.weixin.dao.user;
import java.util.List;
import com.weixin.model.user.User;
public interface IUserDao {
String selectUserNameById(int userId);
List<User> selectAllUser();
void updateUser(User user);
void addUser(User user);
void deleteUserByUserId(int userId);
}
不需要为IUserDao接口提供对应的实现,MyBatis会根据接口名,及UserMapper.xml文件中的namespace,找到对应的SQL,并执行
4. 提供Service层接口,在/com/weixin/service/user/路径下创建IUserService.java文件,代码如下
package com.weixin.service.user;
import java.util.List;
import com.weixin.model.user.User;
public interface IUserService {
public String selectUserNameById(int userId);
public List<User> selectAllUser();
void updateUser(User user);
void addUser(User user);
void deleteUserByUserId(int userId);
}
5. 提供IUserService的实现UserServiceImpl,在/com/weixin/service/user/路径下创建UserServiceImpl.java文件,代码如下
package com.weixin.service.user;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.weixin.dao.user.IUserDao;
import com.weixin.model.user.User;
@Service("userService")
public class UserServiceImpl implements IUserService {
IUserDao userDao;
@Autowired
public void setUserDao(IUserDao userDao) {
this.userDao = userDao;
}
@Override
public String selectUserNameById(int userId) {
return userDao.selectUserNameById(userId);
}
@Override
public List<User> selectAllUser() {
return userDao.selectAllUser();
}
@Override
public void updateUser(User user) {
userDao.updateUser(user);
}
@Override
public void addUser(User user) {
userDao.addUser(user);
}
@Override
public void deleteUserByUserId(int userId) {
userDao.deleteUserByUserId(userId);
}
}
说明:
Ø 需要为UserServiceImpl指定@Service("userService"),说明该Service具有业务处理的功能,Controller层中会使用userService调用对应的业务接口
Ø 在setUserDao()文件中使用@Autowired,Spring会根据此标识自动装载userDao
6. 在/com/weixin/web/controller/user/路径下创建UserController.java,负责响应用户的请求,代码如下
package com.weixin.web.controller.user;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.weixin.model.user.User;
import com.weixin.service.user.IUserService;
@Controller
@RequestMapping("user")
public class UserController {
private static Log log = LogFactory.getLog(UserController.class);
IUserService userService;
@RequestMapping("index")
public String index(HttpServletRequest request) {
String userName = userService.selectUserNameById(1);
System.out.println(userName);
log.info("select username success");
/*User user = new User();
user.setUserId("1");
user.setUserName("spring");
userService.updateUser(user);*/
/*User user = new User();
user.setUserName("aaa");
user.setPassword("123456");
userService.addUser(user);*/
/*int userId = 7;
userService.deleteUserByUserId(userId);*/
List<User> userList = userService.selectAllUser();
request.setAttribute("userList", userList);
return "index";
}
@Autowired
public void setUserService(IUserService userService) {
this.userService = userService;
}
}
说明:
Ø 使用@Controller,使UserController既有控制器的功能
Ø 在UserController上使用@RequestMapping,指定该控制器的访问根路径;在方法上使用@RequestMapping,指定使用哪个方法接收用户请求
Ø 在setUserService(IUserServiceuserService)方法中使用@Autowired,Spring会根据此标识自动装载userService
7. 在/WebContent/jsp/路径下创建index.jsp,代码如下
<%@ include file="/jsp/common/common.jsp"%>
<!DOCTYPEhtmlPUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<metahttp-equiv="Content-Type"content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<c:forEachvar="u"items="${userList }">
${u.userName }
</c:forEach>
</body>
</html>
8. 修改web.xml文件内容,修改后内容如下
<?xmlversion="1.0"encoding="UTF-8"?>
<web-appversion="3.0"
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_3_0.xsd">
<display-name>chaojidazui8</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:config/applicationContext.xml</param-value>
</context-param>
<!-- 日志记录 -->
<context-param>
<!-- 日志配置文件路径 -->
<param-name>log4jConfigLocation</param-name>
<param-value>classpath:config/log4j.properties</param-value>
</context-param>
<context-param>
<!-- 日志页面的刷新间隔 -->
<param-name>log4jRefreshInterval</param-name>
<param-value>6000</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.ContextCleanupListener</listener-class>
</listener>
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:config/mvc-dispatcher-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>*.do</url-pattern>
<!-- <url-pattern>/</url-pattern> -->
</servlet-mapping>
</web-app>
启动服务器,在浏览器中输入如下URL发送请求,请求成功
http://localhost:8080/spring_mybatis/user/index.do
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