Spring mvc + mybaits

项目结构图

首先配置spring支持 web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
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">
<!-- 配置spring支持 -->
 <servlet> <servlet-name>springapp</servlet-name> <!-- 配置核心控制器 --> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springapp</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping>

 <display-name></display-name>
 <welcome-file-list>
 <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>
</web-app>
 

配置spring配置文件 springapp-servlet.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:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" 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-3.0.xsd 
 http://www.springframework.org/schema/aop 
 http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
 http://www.springframework.org/schema/tx 
 http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
 http://www.springframework.org/schema/context 
 http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<!-- 配置视图解析器 -->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<!-- 前缀 -->
<property name="prefix" value="/" />
<!-- 后缀 -->
<property name="suffix" value=".jsp" />
</bean>
<!-- 配置数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<!-- 数据库驱动 -->
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"></property>
<!-- 连接字符串 -->
<property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl"></property>
<!-- 用户名 -->
<property name="username" value="system"></property>
<!-- 密码 -->
<property name="password" value="orcl"></property>
</bean>
<!-- 配置sessionFactory工厂 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="configLocation" value="classpath:myBatis_config.xml"></property>
</bean>
<!--配置模板类 这个是mybatis提供的一个辅助模板 -->
<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg ref="sqlSessionFactory"></constructor-arg>
</bean>
<bean id="userDao" class="com.dragon.dao.impl.UserDaoImpl">
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
<property name="sqlSessionTemplate" ref="sqlSessionTemplate"></property>
</bean>
<bean name="/index.action" class="com.dragon.controller.LoginController">
<property name="userDaoImpl" ref="userDao"></property>
</bean>
<bean name="/insert.action" class="com.dragon.controller.InsertController">
<property name="userDaoImpl" ref="userDao"></property>
</bean>
</beans>
 

配置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>
 
 <settings >
 <!-- 不启用延迟加载 -->
 <setting name="lazyLoadingEnabled" value="false"/>
 </settings>
  <!-- 为bean 起别名 -->
 <typeAliases>
 <typeAlias type="com.dragon.entity.User" alias="User"/>
 </typeAliases>
 
 <!-- 配置orm映射 -->
 <mappers>
 <mapper resource="com/dragon/entity/user_mapper.xml"/>
 </mappers>
 
 </configuration> 

实体类

package com.dragon.entity;
import java.io.Serializable;
/**
* 用户实体类
* @author Administrator
*
*/
public class User implements Serializable {
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserPassword() {
return userPassword;
}
public void setUserPassword(String userPassword) {
this.userPassword = userPassword;
}
public static long getSerialversionuid() {
return serialVersionUID;
}
/**
 * 
 */
private static final long serialVersionUID = 1L;
private int userId;
private String userName;
private String userPassword;
public User() {
super();
}

}
 
实体类的映射文件

user_mapper.xml<wbr></wbr>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN" 
"http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd"> 
<mapper namespace="com.dragon.entity.User">
<!-- 配置orm映射 确保数据库中的列能和bean中的列相对应 -->
<resultMap type="User" id="user_orm">
<id property="userId" column="user_id"/>
<result property="userName" column="user_name"></result>
<result property="userPassword" column="user_password"></result>
</resultMap>
<!-- 查询全部的数据 -->
<select id="selectAll_user" parameterType="User" resultMap="user_orm" >
SELECT 
user_id ,
user_name ,
user_password 
FROM 
UserInfo
</select>
<!-- 根据编号查询单个的数据 -->
<select id="selectById" parameterType="int" resultMap="user_orm">
SELECT * FROM 
UserInfo
 WHERE 
 user_id = #{userId}
</select>
<!-- 根据名称迷糊查询数据 -->
<select id="selectByObj" parameterType="String" resultMap="user_orm">
SELECT * FROM 
UserInfo 
WHERE 
user_name LIKE #{userName}
</select>
<insert id="insertUser" parameterType="User" >
INSERT INTO 
UserInfo 
VALUES
(#{userId},#{userName},#{userPassword})
</insert>
<update id="updateUser" parameterType="User" >
UPDATE 
UserInfo 
SET 
user_name = #{userName},
user_password = #{userPassword} 
WHERE 
user_id = #{userId}
</update>
<delete id="deleteUser" parameterType="User" >
DELETE FROM 
UserInfo
WHERE
user_id=#{userId}
</delete>
</mapper> 

userDao

package com.dragon.dao;
import java.util.List;
import com.dragon.entity.User;
public interface UserDao {
/**
 * 获得全部的方法
 * @return
 */
public abstract List<User> getAll();

/**
 * 根据编号查询
 * @param id
 * @return
 */
public abstract User getById(int id);
/**
 * 更新
 * @param user
 * @return
 */
public abstract int updateUser(User user);
/**
 * 保存
 * @param user
 * @return
 */
public abstract int saveUser(User user);

/**
 * 删除
 * @param user
 * @return
 */
public abstract int deleteUser(User user);
}
 
impl

package com.dragon.dao.impl;
import java.sql.SQLException;
import java.util.List;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionTemplate;
import com.dragon.dao.UserDao;
import com.dragon.entity.User;
public class UserDaoImpl implements UserDao {
/**
 * sessionFactory工厂的方法来获得对象实例
 */
private SqlSessionFactory sqlSessionFactory;
public SqlSessionFactory getSqlSessionFactory() {
return sqlSessionFactory;
}
public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
this.sqlSessionFactory = sqlSessionFactory;
}
/**
 * 通过mybatis提供的模板类来实现
 */
private SqlSessionTemplate sqlSessionTemplate;
public SqlSessionTemplate getSqlSessionTemplate() {
return sqlSessionTemplate;
}
public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {
this.sqlSessionTemplate = sqlSessionTemplate;
}
/**
 * 查询全部的方法
 */
public List<User> getAll() {
// TODO Auto-generated method stub
List<User> userList = null;
SqlSession session1 = null;
try {
//获得session对象
//SqlSession session = this.getSqlSessionFactory().openSession();
//userList = session.selectList("selectAll_user");
///////////////使用sqlSessionTemplate模板类实现
session1 = this.getSqlSessionTemplate().getSqlSessionFactory().openSession();
//根据sql语句查询
userList = session1.selectList("selectAll_user");
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}finally{
try {
if(session1.getConnection().isClosed()==false){
session1.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return userList;
}
public User getById(int id) {
// TODO Auto-generated method stub
User user = null;
try {
SqlSession session1 = this.getSqlSessionTemplate().getSqlSessionFactory().openSession();
user = session1.selectOne("selectById",1);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return user;
}
public int updateUser(User user) {
// TODO Auto-generated method stub
int result = 0;
try {
SqlSession session1 = this.getSqlSessionTemplate().getSqlSessionFactory().openSession();
result= session1.update("updateUser", user);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return result;
}
public int saveUser(User user) {
// TODO Auto-generated method stub
int result = 0;
try {
SqlSession session1 = this.getSqlSessionTemplate().getSqlSessionFactory().openSession();
result= session1.insert("insertUser", user);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return result;
}
public int deleteUser(User user) {
// TODO Auto-generated method stub
int result = 0;
try {
SqlSession session1 = this.getSqlSessionTemplate().getSqlSessionFactory().openSession();
result= session1.delete("deleteUser", user);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return result;
}
}
controller类  查询全部
package com.dragon.controller;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import com.dragon.dao.UserDao;
import com.dragon.entity.User;
public class LoginController implements Controller {
private UserDao userDaoImpl;

public UserDao getUserDaoImpl() {
return userDaoImpl;
}
public void setUserDaoImpl(UserDao userDaoImpl) {
this.userDaoImpl = userDaoImpl;
}
public ModelAndView handleRequest(HttpServletRequest request,
HttpServletResponse response) throws Exception {
// TODO Auto-generated method stub
//ApplicationContext context = new ClassPathXmlApplicationContext("springapp-servlet.xml");
List<User> userList = this.userDaoImpl.getAll();
System.out.println("一共有数据------------------------");
System.out.println(userList.size());
for (int i = 0; i < userList.size(); i++) {
System.out.println(userList.get(i).getUserName());
}
return new ModelAndView("index") ;
}
}