数据库的增删改查

实体类User.java

package com.zhu.vo;
/**
* Created by idea on 2016/6/7.
* 我就是你们的小星星
*/
public class User {
private int id;
private  String name;
private int age;

public User() {
}

public User(int id, String name, int age) {
this.id = id;
this.name = name;
this.age = age;
}

public User(String name, int age) {
this.name = name;
this.age = age;
}

public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}
}

数据访问层UserDao.java

package com.zhu.Dao;

import com.zhu.vo.User;

import java.util.List;

/**
*Created by idea on 2016/6/7.
* 我就是你们的小星星
*/
public interface UserDao {

public int addUser(User user);

public int deleteUser(String name);

public int updateUser(User user);

public List<User>selectUser(int id);

public List<User>selectAll();
}

数据访问层实现类UserDaoImpl.javapackage com.zhu.daoImpl;

import com.zhu.Dao.UserDao;
import com.zhu.vo.User;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.support.SqlSessionDaoSupport;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
*Created by idea on 2016/6/7.
* 我就是你们的小星星
*/
@Repository("userDao")
public class UserDaoImpl extends SqlSessionDaoSupport implements UserDao {
@Autowired
@Override
public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
super.setSqlSessionFactory(sqlSessionFactory);
}

public int addUser(User user) {
return getSqlSession().insert("mybatis/userMapper.addUser" , user);
}

public int deleteUser(String name) {
return getSqlSession().delete("mybatis/userMapper.deleteUser" , name);
}

public int updateUser(User user) {
return getSqlSession().update("mybatis/userMapper.updateUser" , user);
}

public List<User> selectUser(int id) {
return getSqlSession().selectList("mybatis/userMapper.selectUser" , id);
}

public List<User> selectAll() {
return getSqlSession().selectList("mybatis/userMapper.selectAll");
}
}业务层UserService.java

package com.zhu.service;

import com.zhu.vo.User;

import java.util.List;
import java.util.jar.Attributes;

/**
*Created by idea on 2016/6/7.
* 我就是你们的小星星
*/
public interface UserService {

public int addUser(User user);

public int deleteUser(String name);

public int updateUser(User user);

public List<User>selectUser(int id);

public List<User>selectAll();

}

业务层实现类UserServiceImpl.java

package com.zhu.serviceImpl;

import com.zhu.Dao.UserDao;
import com.zhu.service.UserService;
import com.zhu.vo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
*Created by idea on 2016/6/7.
* 我就是你们的小星星
*/
@Service("userService")
public class UserServiceImpl implements UserService {

@Autowired
private UserDao userDao;

public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}

public int addUser(User user) {
return userDao.addUser(user);
}

public int deleteUser(String name) {
return userDao.deleteUser(name);
}

public int updateUser(User user) {
return userDao.updateUser(user);
}

public List<User> selectUser(int id) {
return userDao.selectUser(id);
}

public List<User> selectAll() {
return userDao.selectAll();
}
}

处理层UserController.java

package com.zhu.controller;

import com.zhu.service.UserService;
import com.zhu.vo.User;
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.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.ArrayList;
import java.util.List;

/**
*Created by idea on 2016/6/7.
* 我就是你们的小星星
*/
@Controller
@RequestMapping("/handle")
public class UserController {

@Autowired
private UserService userService;

public void setUserService(UserService userService) {
this.userService = userService;
}

@RequestMapping("/addUser")
@ResponseBody
public List add(User user){
List list = new ArrayList();
list.add(userService.addUser(user));
return list;
}

@RequestMapping("/deleteUser")
@ResponseBody
public List delete(@RequestParam("name") String name){
System.out.println(name);
List list = new ArrayList();
list.add(userService.deleteUser(name));
return list;
}

@RequestMapping("/updateUser")
@ResponseBody
public List update(User user){
List list = new ArrayList();
list.add(userService.updateUser(user));
return list;
}

@RequestMapping("/selectUser")
@ResponseBody
public List selectUser(@RequestParam("id") int id){
List list = new ArrayList();
list.addAll(userService.selectUser(id));
return list;
}

@RequestMapping("/selectAll")
@ResponseBody
public List selectAll(){
List list = new ArrayList();
list.addAll(userService.selectAll());
return list;
}
}

配置文件web.xml

<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_3_0.dtd" >

<web-app>
<display-name>Archetype Created Web Application</display-name>

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/beans.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<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>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<servlet>
<servlet-name>springController</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc/spring-controller.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springController</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>

</web-app>

配置文件beans.xml(spring配置)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:a
4000
op="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.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"> 
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:properties/db.properties"/>
</bean>

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${driverClassName}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:spring/mybatis-config.xml"/>
</bean>

<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="pointcut" expression="execution(* com.zhu.daoImpl.*.*(..))"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/>
</aop:config>

<context:component-scan base-package="com.zhu"/>
</beans>

资源配置文件db.properties

driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/mybatis
username=root
password=root

配置文件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>
<package name="com.zhu.vo"/>
</typeAliases>
<mappers>
<mapper resource="mybatis/userMapper.xml"/>
</mappers>

</configuration>

配置文件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="mybatis/userMapper">

<insert id="addUser" parameterType="User" keyColumn="true">
insert into user (name , age ) values (#{name},#{age})
</insert>

<delete id="deleteUser" parameterType="java.lang.String">
delete from user where name = #{name}
</delete>

<update id="updateUser" parameterType="User">
update user set name = #{name} , age = #{age} where id = #{id}
</update>

<select id="selectUser" resultType="User" parameterType="int">
select * from user where id = #{id}
</select>

<select id="selectAll" resultType="User">
select * from user
</select>
</mapper>

配置文件spring-controller（springmvc

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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/>

<context:component-scan base-package="com.zhu.controller"/>

<bean id="stringConverter" class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
<value>text/plain;charset=UTF-8</value>
</list>
</property>
</bean>
<bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="stringConverter"/>
<ref bean="jsonConverter"/>
</list>
</property>
</bean>

</beans>

user.jsp页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
<style type="text/css" >
span{
color: red;
}
</style>
<script type="text/javascript" src="js/jquery-1.12.4.min.js"></script>
<script type="text/javascript" charset="utf-8">

$(document).ready(function () {
$("#btn1").click(function () {
$.post("/handle/deleteUser.do" , {name : $("#delete").val()} , function (data) {
for (var i = 0 ; i < data.length ; i++) {
$("#s1").html("已成功删除" + data[i] + "条数据")
}
});
});
});

$(document).ready(function () {
$("#btn2").click(function () {
$("#t1").html("");
$.post("/handle/selectUser.do" , {id : $("#selectUser").val()} , function (data) {
var html = "";
for (var i = 0 ; i < data.length ; i++) {
html += "<tr><td>" + data[i].id + "</td><td>" + data[i].name + "</td><td>" + data[i].age + "</td></tr>";
}
$("#t1").html(html);
});
});
});

$(document).ready(function () {
$("#btn3").click(function () {
$("#t1").html("");
$.post("/handle/selectAll.do" , function (data) {
var html = "";
for (var i = 0 ; i < data.length ; i++) {
html += "<tr><td>" + data[i].id + "</td><td>" + data[i].name + "</td><td>" + data[i].age + "</td></tr>";
}
$("#t1").html(html);
});
});
});

$(document).ready(function () {
$("#btn4").click(function () {
$.post("/handle/addUser.do" , {name : $("#add1").val() , age : $("#add2").val()} , function (data) {
for (var i = 0 ; i < data. length ; i++) {
$("#s2").html("已成功添加" + data[i] + "条数据" );
}
});
});
});

$(document).ready(function () {
$("#btn5").click(function () {
$.post("/handle/updateUser.do" , {id : $("#update1").val() , name : $("#update2").val() , age : $("#update3").val()} , function (data) {
for (var i = 0 ; i < data.length ; i++) {
$("#s3").html("已成功更新" + data[i] + "条数据")
}
});
});
});

</script>
</head>
<body>
<div>
<input id="delete" type="text" name="name"> 
<button id="btn1">删除</button> 
<span id="s1"></span>
</div>
<div>
<input id="selectUser" type="text" name="id"> 
<button id="btn2">查询</button> 
<button id="btn3">查询全部</button>
</div>
<div>
<input id="add1" type="text" name="name"> 
<input id="add2" type="text" name="age"> 
<button id="btn4">增加</button>
<span id="s2"></span> 
</div>
<div>
<input id="update1" type="text" name="id"> 
<input id="update2" type="text" name="name"> 
<input id="update3" type="text" name="age"> 
<button id="btn5">更改</button> 
<span id="s3"></span>
</div>
<br/>
<br/>
<div>
<table width="80%" align="left">
<tr>
<td>编号</td>
<td>姓名</td>
<td>年龄</td>
</tr>
<tbody id="t1"></tbody>
</table>
</div>
</body>
</html>

因时间紧迫博文中没有加以注释，如果博友有问题请提出（本人也是初出茅庐）大家一起学习，共同进步。