Maven+SSM框架实现简单的增删改查
Spring介绍:
spring 使用基本的 JavaBean 来完成以前只可能由 EJB 完成的事情。然而, Spring的用途不仅限于服务器端的开发。从简单性、可测试性和松耦合的角度而言,任何Java 应用都可以从 Spring 中受益。 简单来说, Spring 是一个轻量级的控制反转(IoC )和面向切面( AOP )的容器框架。
SpringMVC介绍
MyBatis介绍
创建数据库、表db_zsl t_user user_t【最下面有sql语句】
1.项目整体结构
2.添加相关jar 包
3.项目整体结构出来了
4.创建model【User】
- package com.lyt.model;
 - /**
 - * 用户
 - * @author
 - *
 - */
 - public class User {
 - private int id;
 - private String userName;
 - private String age;
 - @Override
 - public String toString() {
 - return "User [id=" + id + ", age=" + age + ", userName=" + userName
 - + "]";
 - }
 - public User(){
 - super();
 - }
 - public int getId() {
 - return id;
 - }
 - public void setId(int id) {
 - this.id = id;
 - }
 - public String getAge() {
 - return age;
 - }
 - public void setAge(String age) {
 - this.age = age;
 - }
 - public String getUserName() {
 - return userName;
 - }
 - public void setUserName(String userName) {
 - this.userName = userName;
 - }
 - public User(int id, String age, String userName) {
 - super();
 - this.id = id;
 - this.age = age;
 - this.userName = userName;
 - }
 - }
 
5.创建DAO接口【在mybatis中 mapper就相当于dao】
- package com.lyt.mapper;
 - import java.util.List;
 - import com.lyt.model.User;
 - /**
 - * 做为 DAO的接口
 - * @author
 - */
 - public interface UserMapper {
 - void save(User user);
 - boolean update(User user);
 - boolean delete(int id);
 - User findById(int id);
 - List<User> findAll();
 - }
 
5.创建DAO接口【在mybatis中 mapper就相当于dao】
- package com.lyt.mapper;
 - import java.util.List;
 - import com.lyt.model.User;
 - /**
 - * 做为 DAO的接口
 - * @author */
 - public interface UserMapper {
 - void save(User user);
 - boolean update(User user);
 - boolean delete(int id);
 - User findById(int id);
 - List<User> findAll();
 - }
 
6.实现dao接口【mybatis中就是UserMapper.xml文件】
- <?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">
 - <!--
 - namespace:必须与对应的接口全类名一致 UserMapper.java
 - id :必须与对应接口的某个对应的方法名一致即必须要和UserMapper.java接口中的方法同名。
 - -->
 - <mapper namespace="com.lyt.mapper.UserMapper">
 - <insert id="save" parameterType="User">
 - insert into t_user(user_name,user_age) values(#{userName},#{age})
 - </insert>
 - <update id="update" parameterType="User">
 - update t_user set user_name=#{userName},user_age=#{age} where user_id=#{id}
 - </update>
 - <delete id="delete" parameterType="int">
 - delete from t_user where user_id=#{id}
 - </delete>
 - <!-- mybsits_config中配置的alias类别名,也可直接配置resultType为类路径 -->
 - <select id="findById" parameterType="int" resultType="User">
 - select user_id id,user_name userName,user_age age from t_user where user_id=#{id}
 - </select>
 - <select id="findAll" resultType="User">
 - select user_id id,user_name userName,user_age age from t_user
 - </select>
 - </mapper>
 
这里对这个xml文件作几点说明: 
1、namespace必须与对应的接口全类名一致。 
2、id必须与对应接口的某个对应的方法名一致即必须要和UserMapper.java接口中的方法同名。 
---------------------------------------------------
7.mybatis与Spring整合【spring-common.xml】放在src的根目录下
对于Mybatis和Spring的整合是这篇博文的重点,需要配置的内容在下面有详细的解释。
- <?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: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-4.0.xsd
 - http://www.springframework.org/schema/context
 - http://www.springframework.org/schema/context/spring-context-4.0.xsd
 - http://www.springframework.org/schema/tx
 - http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
 - <!-- Mybatis和Spring的整合 -->
 - <!-- 1. 数据源 : DriverManagerDataSource -->
 - <bean id="dataSource"
 - class="org.springframework.jdbc.datasource.DriverManagerDataSource">
 - <property name="driverClassName" value="com.mysql.jdbc.Driver" />
 - <property name="url" value="jdbc:mysql://localhost:3306/db_zsl" />
 - <property name="username" value="root" />
 - <property name="password" value="root" />
 - </bean>
 - <!--
 - 2. mybatis的SqlSession的工厂: SqlSessionFactoryBean dataSource:引用数据源
 - MyBatis定义数据源,同意加载配置
 - -->
 - <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
 - <property name="dataSource" ref="dataSource"></property>
 - <property name="configLocation" value="classpath:mybatis-config.xml" />
 - </bean>
 - <!--
 - 3. mybatis自动扫描加载Sql映射文件/接口 : MapperScannerConfigurer sqlSessionFactory
 - basePackage:指定sql映射文件/接口所在的包(自动扫描)
 - -->
 - <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
 - <property name="basePackage" value="com.lyt.mapper"></property>
 - <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
 - </bean>
 - <!--
 - 4. 事务管理 : DataSourceTransactionManager dataSource:引用上面定义的数据源
 - -->
 - <bean id="txManager"
 - class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
 - <property name="dataSource" ref="dataSource"></property>
 - </bean>
 - <!-- 5. 使用声明式事务
 - transaction-manager:引用上面定义的事务管理器
 - -->
 - <tx:annotation-driven transaction-manager="txManager" />
 - </beans>
 
8.mybatis配置文件【mybatis-config.xml】放在src目录下
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 实体类,简称 -设置别名 -->
<typeAliases>
<typeAlias alias="User" type="com.lyt.model.User" />
</typeAliases>
<!-- 实体接口映射资源 -->
<!--
说明:如果xxMapper.xml配置文件放在和xxMapper.java统一目录下,mappers也可以省略,因为org.mybatis.spring.mapper.MapperFactoryBean默认会去查找与xxMapper.java相同目录和名称的xxMapper.xml
-->
<mappers>
<mapper resource="com/lyt/mapper/userMapper.xml" />
</mappers>
</configuration>
1、配置log4j.properties
- ### set log levels ###
 - log4j.rootLogger = info , Console , D
 - #Console
 - log4j.appender.Console=org.apache.log4j.ConsoleAppender
 - log4j.appender.Console.layout=org.apache.log4j.PatternLayout
 - log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
 - log4j.logger.java.sql.ResultSet=INFO
 - log4j.logger.org.apache=INFO
 - log4j.logger.java.sql.Connection=INFO
 - log4j.logger.java.sql.Statement=INFO
 - log4j.logger.java.sql.PreparedStatement=INFO
 - #output2file
 - log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
 - log4j.appender.D.File = D\:/logs/log.log
 - log4j.appender.D.Append = true
 - log4j.appender.D.Threshold = INFO \#\# \u00E8\u00BE\u0093\u00E5\u0087\u00BAinfo\u00E7\u00BA\u00A7\u00E5\u0088\u00AB\u00E4\u00BB\u00A5\u00E4\u00B8\u008A\u00E7\u009A\u0084\u00E6\u0097\u00A5\u00E5\u00BF\u0097
 - log4j.appender.D.layout = org.apache.log4j.PatternLayout
 - log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH\:mm\:ss} [ %t\:%r ] - [ %p ] %m%n
 
10.整合Springmvc
配置【spring-mvc.xml】放在src根目录下
- <?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/beans
 - http://www.springframework.org/schema/beans/spring-beans.xsd
 - http://www.springframework.org/schema/context
 - http://www.springframework.org/schema/context/spring-context-4.0.xsd
 - http://www.springframework.org/schema/mvc
 - http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
 - <!-- 注解扫描包 -->
 - <context:component-scan base-package="com.lyt.controller" />
 - <context:component-scan base-package="com.lyt.service" />
 - <!-- 开启注解 -->
 - <mvc:annotation-driven />
 - <!--
 - 配置静态资源,直接映射到对应的文件夹,不被DispatcherServlet处理,3.04新增功能,需要重新设置spring-mvc-3.0.xsd
 - -->
 - <mvc:resources mapping="/img/**" location="/img/" />
 - <mvc:resources mapping="/js/**" location="/js/" />
 - <mvc:resources mapping="/css/**" location="/css/" />
 - <mvc:resources mapping="/html/**" location="/html/" />
 - <!-- 定义跳转的文件的前后缀 ,视图模式配置-->
 - <bean id="viewResolver"
 - class="org.springframework.web.servlet.view.InternalResourceViewResolver">
 - <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀,变成一个 可用的url地址 -->
 - <property name="prefix" value="/WEB-INF/jsp/" />
 - <property name="suffix" value=".jsp" />
 - </bean>
 - </beans>
 
11.配置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">
 - <!-- 加载Spring容器配置 -->
 - <listener>
 - <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
 - </listener>
 - <!-- 设置Spring容器加载所有的配置文件的路径 -->
 - <context-param>
 - <param-name>contextConfigLocation</param-name>
 - <!-- <param-value>classpath:config/spring-*.xml</param-value> -->
 - <param-value>classpath:spring-common.xml,classpath:spring-mvc.xml</param-value>
 - </context-param>
 - <!-- 配置SpringMVC核心控制器 -->
 - <servlet>
 - <servlet-name>springMVC</servlet-name>
 - <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
 - <!-- 配置初始配置化文件,前面contextConfigLocation看情况二选一 -->
 - <init-param>
 - <param-name>contextConfigLocation</param-name>
 - <param-value>classpath:spring-common.xml,classpath:spring-mvc.xml</param-value>
 - </init-param>
 - <!-- 启动加载一次 -->
 - <load-on-startup>1</load-on-startup>
 - </servlet>
 - <!--为DispatcherServlet建立映射 -->
 - <servlet-mapping>
 - <servlet-name>springMVC</servlet-name>
 - <!-- 此处可以可以配置成*.do,对应struts的后缀习惯 -->
 - <url-pattern>/</url-pattern>
 - </servlet-mapping>
 - <!-- 防止Spring内存溢出监听器 -->
 - <listener>
 - <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
 - </listener>
 - <!-- 解决工程编码过滤器 -->
 - <filter>
 - <filter-name>encodingFilter</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>encodingFilter</filter-name>
 - <url-pattern>/*</url-pattern>
 - </filter-mapping>
 - <welcome-file-list>
 - <welcome-file>index.jsp</welcome-file>
 - </welcome-file-list>
 - </web-app>
 - 12.建立service以及service实现【UserService.java】
- package com.lyt.service;
 - import java.util.List;
 - import com.lyt.model.User;
 - public interface UserService {
 - void save(User user);
 - boolean update(User user);
 - boolean delete(int id);
 - User findById(int id);
 - List<User> findAll();
 - }
 
【UserServiceImpl.java】
- package com.lyt.service.impl;
 - import java.util.List;
 - import javax.annotation.Resource;
 - import org.springframework.stereotype.Service;
 - import org.springframework.transaction.annotation.Transactional;
 - import com.lyt.mapper.UserMapper;
 - import com.lyt.model.User;
 - import com.lyt.service.UserService;
 - @Service
 - @Transactional
 - // 此处不再进行创建SqlSession和提交事务,都已交由spring去管理了。
 - public class UserServiceImpl implements UserService {
 - @Resource
 - private UserMapper mapper;
 - /**
 - * 根据 id 删除 数据
 - */
 - public boolean delete(int id) {
 - return mapper.delete(id);
 - }
 - /**
 - * 查询User的全部数据
 - */
 - public List<User> findAll() {
 - List<User> findAllList = mapper.findAll();
 - return findAllList;
 - }
 - /**
 - * 根据 id 查询 对应数据
 - */
 - public User findById(int id) {
 - User user = mapper.findById(id);
 - return user;
 - }
 - /**
 - * 新增数据
 - */
 - public void save(User user) {
 - mapper.save(user);
 - }
 - /**
 - * 根据 id 修改对应数据
 - */
 - public boolean update(User user) {
 - return mapper.update(user);
 - }
 - }
 
13.建立Controller【UserController.java】
- <span style="font-size:14px;">package com.lyt.controller;
 - import java.io.IOException;
 - import java.io.PrintWriter;
 - import java.util.List;
 - import javax.servlet.http.HttpServletRequest;
 - import javax.servlet.http.HttpServletResponse;
 - import org.springframework.beans.factory.annotation.Autowired;
 - import org.springframework.stereotype.Controller;
 - import org.springframework.ui.Model;
 - import org.springframework.web.bind.annotation.RequestMapping;
 - import com.lyt.model.User;
 - import com.lyt.service.UserService;
 - @Controller
 - @RequestMapping("/user")
 - public class UserController {
 - @Autowired
 - private UserService userService;
 - /**
 - * 获取所有用户列表
 - * @param request
 - * @return
 - */
 - @RequestMapping("/getAllUser")
 - public String getAllUser(HttpServletRequest request,Model model){
 - List<User> user = userService.findAll();
 - model.addAttribute("userList", user);
 - request.setAttribute("userList", user);
 - return "/allUser";
 - }
 - /**
 - * 跳转到添加用户界面
 - * @param request
 - * @return
 - */
 - @RequestMapping("/toAddUser")
 - public String toAddUser(){
 - return "/addUser";
 - }
 - /**
 - * 添加用户并重定向
 - * @param user
 - * @param request
 - * @return
 - */
 - @RequestMapping("/addUser")
 - public String addUser(User user,Model model){
 - userService.save(user);
 - return "redirect:/user/getAllUser";
 - }
 - /**
 - *编辑用户
 - * @param user
 - * @param request
 - * @return
 - */
 - @RequestMapping("/updateUser")
 - public String updateUser(User user,HttpServletRequest request,Model model){
 - if(userService.update(user)){
 - user = userService.findById(user.getId());
 - request.setAttribute("user", user);
 - model.addAttribute("user", user);
 - return "redirect:/user/getAllUser";
 - }else{
 - return "/error";
 - }
 - }
 - /**
 - * 根据id查询单个用户
 - * @param id
 - * @param request
 - * @return
 - */
 - @RequestMapping("/getUser")
 - public String getUser(int id,HttpServletRequest request,Model model){
 - request.setAttribute("user", userService.findById(id));
 - model.addAttribute("user", userService.findById(id));
 - return "/editUser";
 - }
 - /**
 - * 删除用户
 - * @param id
 - * @param request
 - * @param response
 - */
 - @RequestMapping("/delUser")
 - public void delUser(int id,HttpServletRequest request,HttpServletResponse response){
 - String result = "{\"result\":\"error\"}";
 - if(userService.delete(id)){
 - result = "{\"result\":\"success\"}";
 - }
 - response.setContentType("application/json");
 - try {
 - PrintWriter out = response.getWriter();
 - out.write(result);
 - } catch (IOException e) {
 - e.printStackTrace();
 - }
 - }
 - }
 - </span>
 
至此 大部分架构以及代码已经搭建完成
我们来做前台页面--修改index.jsp
- <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
 - <%
 - String path = request.getContextPath();
 - String basePath = request.getScheme() + "://"
 - + request.getServerName() + ":" + request.getServerPort()
 - + path + "/";
 - %>
 - <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 - <html>
 - <head>
 - <base href="<%=basePath%>">
 - <title>首页</title>
 - </head>
 - <body>
 - <h5>
 - <a href="<%=basePath%>user/getAllUser">进入用户管理页</a>
 - </h5>
 - </body>
 - </html>
 
在 WEB-INF 下新建jsp文件夹【里面新建以下文件】【addUser.jsp】【allUser.jsp】【editUser.jsp】
addUser.jsp内容
- <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 - <%
 - String path = request.getContextPath();
 - String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 - %>
 - <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 - <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 - <html>
 - <head>
 - <base href="<%=basePath%>">
 - <title>添加用户</title>
 - <script type="text/javascript">
 - function addUser(){
 - var form = document.forms[0];
 - form.action = "<%=basePath%>user/addUser";
 - form.method="post";
 - form.submit();
 - }
 - </script>
 - </head>
 - <body>
 - <h1><%=path%>添加用户<%=basePath%></h1>
 - <form action="" name="userForm">
 - 姓名:<input type="text" name="userName">
 - 年龄:<input type="text" name="age">
 - <input type="button" value="添加" onclick="addUser()">
 - </form>
 - </body>
 - </html>
 
allUser.jsp
- <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 - <%
 - String path = request.getContextPath();
 - String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 - %>
 - <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 - <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 - <html>
 - <head>
 - <base href="<%=basePath%>">
 - <script type="text/javascript" src="js/jquery-1.7.1.js"></script>
 - <title>用户列表</title>
 - <script type="text/javascript">
 - function del(id){
 - $.get("<%=basePath%>user/delUser?id=" + id,function(data){
 - if("success" == data.result){
 - alert("删除成功");
 - window.location.reload();
 - }else{
 - alert("删除失败");
 - }
 - });
 - }
 - </script>
 - </head>
 - <body>
 - <h6><a href="<%=basePath%>user/toAddUser">添加用户</a></h6>
 - <table border="1">
 - <tbody>
 - <tr>
 - <th>姓名</th>
 - <th>年龄</th>
 - <th>操作</th>
 - </tr>
 - <c:if test="${!empty userList }">
 - <c:forEach items="${userList}" var="user">
 - <tr>
 - <td>${user.userName }</td>
 - <td>${user.age }</td>
 - <td>
 - <a href="<%=basePath%>user/getUser?id=${user.id}">编辑</a>
 - <a href="javascript:del('${user.id }')">删除</a>
 - </td>
 - </tr>
 - </c:forEach>
 - </c:if>
 - </tbody>
 - </table>
 - </body>
 - </html>
 
editUser.jsp
- <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 - <%
 - String path = request.getContextPath();
 - String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 - %>
 - <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 - <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 - <html>
 - <head>
 - <base href="<%=basePath%>">
 - <title>编辑用户</title>
 - <script type="text/javascript">
 - function updateUser(){
 - var form = document.forms[0];
 - form.action = "<%=basePath%>user/updateUser";
 - form.method="post";
 - form.submit();
 - }
 - </script>
 - </head>
 - <body>
 - <h1>添加用户</h1>
 - <form action="" name="userForm">
 - <input type="hidden" name="id" value="${user.id }"/>
 - 姓名:<input type="text" name="userName" value="${user.userName }"/>
 - 年龄:<input type="text" name="age" value="${user.age }"/>
 - <input type="button" value="编辑" onclick="updateUser()"/>
 - </form>
 - </body>
 - </html>
 
到此 简单的整合SSM 【基本的操作内容已经完成】
让你们看下界面运行,地址:http://localhost:8088/SpringMVC_Spring_mybatis/
首页:
点击编辑进去:
点击添加进去:
由于我在网络问题 图片暂时没有上传上去。【现在我吧图片都正上去了,希望多多支持】对应的数据库 表- /*
 - Navicat MySQL Data Transfer
 - Source Server : localhost
 - Source Server Version : 50515
 - Source Host : localhost:3306
 - Source Database : db_zsl
 - Target Server Type : MYSQL
 - Target Server Version : 50515
 - File Encoding : 65001
 - Date: 2016-05-16 16:10:51
 - */
 - SET FOREIGN_KEY_CHECKS=0;
 - -- ----------------------------
 - -- Table structure for `t_user`
 - -- ----------------------------
 - DROP TABLE IF EXISTS `t_user`;
 - CREATE TABLE `t_user` (
 - `user_id` int(11) NOT NULL AUTO_INCREMENT,
 - `user_name` varchar(20) NOT NULL,
 - `user_age` varchar(20) NOT NULL,
 - PRIMARY KEY (`user_id`)
 - ) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;
 - -- ----------------------------
 - -- Records of t_user
 - -- ----------------------------
 - INSERT INTO `t_user` VALUES ('2', '朱佳鹏', '25');
 - INSERT INTO `t_user` VALUES ('3', '傻狍子', '150');
 - INSERT INTO `t_user` VALUES ('4', 'jiuqiyuliang', '23');
 - INSERT INTO `t_user` VALUES ('5', 'jiuqiyuliang', '23');
 - INSERT INTO `t_user` VALUES ('6', 'jiuqiyuliang', '23');
 - INSERT INTO `t_user` VALUES ('7', 'jiuqiyuliang', '23');
 - INSERT INTO `t_user` VALUES ('9', 'liyintao123', '23123');
 - -- ----------------------------
 - -- Table structure for `user_t`
 - -- ----------------------------
 - DROP TABLE IF EXISTS `user_t`;
 - CREATE TABLE `user_t` (
 - `id` int(11) NOT NULL AUTO_INCREMENT,
 - `user_name` varchar(40) NOT NULL,
 - `password` varchar(255) NOT NULL,
 - `age` int(4) NOT NULL,
 - PRIMARY KEY (`id`)
 - ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
 - -- ----------------------------
 - -- Records of user_t
 - -- ----------------------------
 - INSERT INTO `user_t` VALUES ('1', '测试', 'sfasgfaf', '24');
 
 
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