springMVC+mybatis整合(新手)

由于之前只使用过SpringMVC没有用过mybatis，这次用到了这个数据库框架，要自己整合，顺便把一些个人感觉有坑的地方，按照一遍看懂的模式来做个记录

结构图:



首先来配置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:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd"> 
<description>Spring MVC Configuration</description>

<!-- 启动Springmvc注解驱动 ，主要作用于@Controller激活该模式下面是一种简写形式它会自动注册DefaultAnnotationHandlerMapping与AnnotationMethodHandlerAdapter， 是spring MVC为@Controllers分发请求所必须的   -->
<mvc:annotation-driven/>
<!-- 使用Annotation自动注册Bean,只扫描@Controller -->
<context:component-scan base-package="com.mhsk.controller" use-default-filters="false"><!-- base-package 如果多个，用“,”分隔 -->
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

<!-- 视图文件解析配置 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!-- 上传文件拦截，设置最大上传文件大小   10M=10*1024*1024(B)=10485760 bytes -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="10485760" />
</bean>
</beans>

接下来是spring-context.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:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:jee="http://www.springframework.org/schema/jee" 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-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-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/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd"
default-lazy-init="true">

<description>Spring Configuration</description>

<!-- 加载配置文件 -->
<context:property-placeholder ignore-unresolvable="true" location="classpath*:/jdbc.properties"/>

<!-- 使用Annotation自动注册Bean，解决事务失效问题，在主容器中不扫描以@Controller注解，在SpringMVC中只扫描@Controller注解 -->
<context:component-scan base-package="com.mhsk.controller">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

<!-- 自动扫描(自动注入) -->
<context:component-scan base-package="com.mhsk.service" />

</beans>

关键配置spring-context-mybatis.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:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:jee="http://www.springframework.org/schema/jee" 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/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd"
default-lazy-init="true">

<description>Mybatis Configuration</description>

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>${jdbc_driverClassName}</value>
</property>
<property name="url">
<value>${jdbc_url}</value>
</property>
<property name="username">
<value>${jdbc_username}</value>
</property>
<property name="password">
<value>${jdbc_password}</value>
</property>
<!-- 连接属性 -->
<property name="connectionProperties">
<value>clientEncoding=UTF-8</value>
</property>
</bean>

<!-- Mybatis begin -->
<!-- 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="configLocation" value="classpath:mybatis-config.xml" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.mhsk.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
<!-- Mybatis end -->

<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>

</beans>

这里最关键的就是配置sqlsessionfactory,还有就是mapper.xml的路径

这里配置的时候老是找不到mapper，

<property name="configLocation" value="classpath:mybatis-config.xml" />

这里是把mapper配置到mybatis-config.xml，如果你感觉麻烦，也可以配成<property name="mapperLocations" value="classpath*:com/mhsk/dao/*.xml" />

但是注意，这里如果换成这种配置的话，要把mapper文件和dao借口放在一个包里

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>
<typeAliases>
<!-- give a alias for model -->
<typeAlias alias="mhskUser" type="com.mhsk.model.MhskUser"></typeAlias>
</typeAliases>
<mappers>
<mapper resource="com/mhsk/mapper/MhskUsermapper.xml" />
</mappers>
</configuration>

OK，最主要的都配置完了，jdbc和日志就不写了

MhskUser实体类

package com.mhsk.model;

public class MhskUser {
private Integer id;
private String user_name;
private String password;
private Integer pageNow;
private Integer pageSize;

public Integer getPageNow() {
return pageNow;
}
public void setPageNow(Integer pageNow) {
this.pageNow = pageNow;
}
public Integer getPageSize() {
return pageSize;
}
public void setPageSize(Integer pageSize) {
this.pageSize = pageSize;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUser_name() {
return user_name;
}
public void setUser_name(String user_name) {
this.user_name = user_name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}

}

dao:

package com.mhsk.dao;

import java.util.List;

import com.mhsk.model.MhskUser;

//@MyBatisDao
public interface MhskUserMapper {
public List<MhskUser> save();
public void delete(int id);
public void insert(MhskUser mhskUser);
public void update(MhskUser mhskUser);
}

mapper.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.mhsk.dao.MhskUserMapper">
<!-- 查询所有mhskUser 返回resultMap类型-->
<resultMap type="com.mhsk.model.MhskUser" id="mhskUserResult">
<result column="id" property="id" />
<result column="user_name" property="user_name" />
<result column="password" property="password" />
<result column="pageNow" property="pageNow" />
<result column="pageSize" property="pageSize" />
</resultMap>

<select id="save" resultMap="mhskUserResult">
select * from mhsk_user
</select>
<!-- 新增mhskUser 参数类型为mhskUser-->
<insert id="insert" parameterType="mhskUser">
insert into mhsk_user(id,user_name,password)
values(#{id},#{user_name},#{password})
</insert>
<!-- 更新mhskUser 参数类型为mhskUser-->
<update id="update" parameterType="mhskUser">
update mhsk_user
set mhsk_user.user_name = #{user_name},mhsk_user.password =#{password}
where mhsk_user.id=#{id}
</update>
<!-- 删除mhskUser 参数类型为int-->
<delete id="delete" parameterType="int">
delete from mhsk_user
where mhsk_user.id = #{id}
</delete>
</mapper>

MhskUserService接口

package com.mhsk.service;

import java.util.List;

import com.mhsk.model.MhskUser;

public interface MhskUserService {

public List<MhskUser> save();

public void delete(int id);

public void update(MhskUser mhskUser);

public void insert(MhskUser mhskUser);
}

MhskUserServiceImpl实现类

package com.mhsk.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.mhsk.dao.MhskUserMapper;
import com.mhsk.model.MhskUser;
import com.mhsk.service.MhskUserService;

@Service(value="mhskUserService")
public class MhskUserServiceImpl implements MhskUserService {
@Autowired
private MhskUserMapper mhskUserMapper;

@Override
public List<MhskUser> save() {

return mhskUserMapper.save();
}

@Override
public void delete(int id) {
mhskUserMapper.delete(id);

}

@Override
public void update(MhskUser mhskUser) {
mhskUserMapper.update(mhskUser);

}

@Override
public void insert(MhskUser mhskUser) {
mhskUserMapper.insert(mhskUser);

}

}

MhskUserController

package com.mhsk.controller;

import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.mhsk.model.MhskUser;
import com.mhsk.service.MhskUserService;

@Controller
@RequestMapping(value="mhskUser")
public class MhskUserController {
@Resource(name="mhskUserService")
private MhskUserService mhskUserService;

@RequestMapping(value="select")
public ModelAndView login(HttpServletRequest request){
List<MhskUser> mhskUser=mhskUserService.save();
request.setAttribute("mhskUser", mhskUser);
ModelAndView mv = new ModelAndView("login");
return mv;
}
@RequestMapping(value="page")
public ModelAndView page(HttpServletRequest request,int pageNow,int pageSize){
List<MhskUser> mhskUser=mhskUserService.save();
request.setAttribute("mhskUser", mhskUser);
ModelAndView mv = new ModelAndView("login");
return mv;
}
@RequestMapping(value="delete")
public ModelAndView delete(HttpServletRequest request,int id){
mhskUserService.delete(id);
List<MhskUser> mhskUser=mhskUserService.save();
request.setAttribute("mhskUser", mhskUser);
ModelAndView mv = new ModelAndView("login");
return mv;
}
@RequestMapping(value="addall")
public ModelAndView addall(){
ModelAndView mv = new ModelAndView("add");
return mv;
}
@RequestMapping(value="add")
public ModelAndView add(HttpServletRequest request,String user_name,String password){
MhskUser mhskUser=new MhskUser();
mhskUser.setUser_name(user_name);
mhskUser.setPassword(password);
mhskUserService.insert(mhskUser);
List<MhskUser> mhskUserall=mhskUserService.save();
request.setAttribute("mhskUser", mhskUserall);
ModelAndView mv = new ModelAndView("login");
return mv;
}
@RequestMapping(value="updateall")
public ModelAndView selectbyid(HttpServletRequest request,String user_name,String password){
System.out.println(user_name);
System.out.println(password);
request.setAttribute("user_name", user_name);
request.setAttribute("password", password);
ModelAndView mv = new ModelAndView("update");
return mv;
}
@RequestMapping(value="update")
public ModelAndView update(HttpServletRequest request,String user_name,String password){
MhskUser mhskUser=new MhskUser();
mhskUser.setUser_name(user_name);
mhskUser.setPassword(password);
mhskUserService.update(mhskUser);
List<MhskUser> mhskUserll=mhskUserService.save();
request.setAttribute("mhskUser", mhskUserll);
ModelAndView mv = new ModelAndView("login");
return mv;
}
}

login.jsp

<%@ page language="java" contentType="text/html" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<a href="http://localhost:8080/mhsk_bzhang/mhskUser/addall.do">新增</a></br>
<c:forEach items="${mhskUser}" var="item">
<td>${item.id }</td>
<td>${item.user_name }</td>
<td>${item.password }</td>
<td><a href="http://localhost:8080/mhsk_bzhang/mhskUser/delete.do?id=${item.id}">删除</a></td>
<td><a href="http://localhost:8080/mhsk_bzhang/mhskUser/updateall.do?user_name=${item.user_name}&password=${item.password}&id=${item.id}">修改</a></td>
</br>
</c:forEach>

<a href="http://localhost:8080/mhsk_bzhang/mhskUser/page.do?pageNow=${item[1].id-5}&pageSize=5">上一页</a>
<a href="http://localhost:8080/mhsk_bzhang/mhskUser/page.do?pageNow=${item[1].id+5}&pageSize=5">下一页</a>
</body>
</html>

OK 大部分就写完了

写几个需要注意的地方：

mapper.xml中<mapper namespace="com.mhsk.dao.MhskUserMapper">属性找的是mapper，

<resultMap type="com.mhsk.model.MhskUser" id="mhskUserResult">

<result column="id" property="id" />

<result column="user_name" property="user_name" />

<result column="password" property="password" />

<result column="pageNow" property="pageNow" />

<result column="pageSize" property="pageSize" />

</resultMap>

这里的resultmap type找的实体类，起了个id叫mhskUserResult

parameterType="mhskUser"
为参数的类型 例如根据id查询 就应该这样写parameterType="java.lang.Integer"

问题来了，这里只让传一个参数，传2个的话接不到，比如分页，要传过来2个int

那就在dao接口里这样写

public List<MhskUser> select (@Param(value="startRow")int startRow,@Param(value="pageSize")int pageSize);

把参数注进来就可以接到，测试通过了的

另外service层必须要写接口，不然就会报错，不知道为什么

OK 写完了，为自己留存~~~

整个项目下载地址 ：http://download.csdn.net/detail/zangjiwei/8538983