Mybatis+Struts2的结合:实现用户插入和查找
总结一下今天一个成功的小实验：Mybatis+Struts2的结合:实现用户插入和查找。删除和修改如果以后写了，会继续更新。
一 准备工作。
1.新建一个java web项目。
2.在webContent\lib目录下导入所需要的jar包。
a.struts2需要的jar包。
struts2 xwork-core.jar strut2-core.jar ognl.jar commoms-lang.jar freemarker.jar commons-fileupload.jar
包的位置：
struts-2.3.24.1-all\struts-2.3.24.1\apps\WEB-INF\lib
我下载的struts2的版本这个目录下有13个jar包，每个jar包的作用网上都可以查到。正常使用加入这六个就可以了。
b.mybatis需要的的jar包。
asm.jar cglib.jar commons-logging-.jar log4j.jar mybatis.jar slf4j-api.jar slf4j-log4j12.jar
c.mysql需要的jar包。
mysql-connector-java-5.1.7-bin.jar
到此准备工作就做好了。
二.工程目录
在这里我贴出我的工程目录，便于我后面进行描述。
三.写代码。
对于Java web 工程的搭建，服务器的搭建我就不多说了，因为网上资料很多。(虽然我写的也有很多，但是只是想给自己做一个简单的总结，顺便分享给需要的人)
1.webContent\lib\web.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> 3 <display-name>MybatisAndStruts2</display-name> 4 <welcome-file-list> 5 <welcome-file>index.jsp</welcome-file> 6 </welcome-file-list> 7 <filter> 8 <filter-name>struts2</filter-name> 9 <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> 10 </filter> 11 <filter-mapping> 12 <filter-name>struts2</filter-name> 13 <url-pattern>/*</url-pattern> 14 </filter-mapping> 15 </web-app>
2.index.jsp
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <% 4 5 String path = request.getContextPath(); 6 String BasePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 7 8 %> 9 10 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 11 <html> 12 <head> 13 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 14 <base href="<%=BasePath %>"></base> 15 <title>首页</title> 16 </head> 17 <body> 18 <h3 align="center">添加用户</h3> 19 <form action="user/user!add"> 20 <table align="center"> 21 <tr> 22 <td><input type="text" name="username"></td> 23 </tr> 24 <tr> 25 <td><input type="password" name="password"></td> 26 </tr> 27 <tr> 28 <td><input type="submit" value="提交"></td> 29 </tr> 30 </table> 31 </form> 32 33 <h3 align="center">查询所有用户</h3> 34 <p align="center"><a href="user/user!get">查询</a></p> 35 </body> 36 </html>
3. user_add_success.jsp
1 <%@ page language="java" contentType="text/html; charset=ISO-8859-1" 2 pageEncoding="ISO-8859-1"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 7 <title>Insert title here</title> 8 </head> 9 <body bgcolor="#33CC99"> 10 <h3 align="center">user add success</h3></body> 11 </html>
4. user_get.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@taglib prefix="s" uri="/struts-tags"%> <!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=UTF-8"> <title>Insert title here</title> </head> <body bgcolor="#33CC99"> <h3 align="center">用户列表</h3></body> <table align="center"> <tr> <td>ID</td> <td>用户名</td> <td>密码</td> </tr> <s:iterator value="users" > <tr> <td> <s:property value="id" /> </td> <td> <s:property value="username" /> </td> <td> <s:property value="password" /> </td> </tr> </s:iterator> </table> </html>
5. struts.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE struts PUBLIC 3 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4 "http://struts.apache.org/dtds/struts-2.3.dtd"> 5 6 <struts> 7 <constant name="struts.devMode" value="true" /> 8 <constant name="struts.enable.DynamicMethodInvocation" value="true" /> 9 10 <package name="default" namespace="/user" extends="struts-default"> 11 <action name="user" class="com.hjj.action.UserAction" > 12 <result name="add"> 13 /user_add_success.jsp 14 </result> 15 16 <result name="get"> 17 /user_get.jsp?users=${users} 18 </result> 19 </action> 20 </package> 21 </struts>
6. conf.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> 3 <configuration> 4 <environments default="development"> 5 <environment id="development"> 6 <transactionManager type="JDBC" /> 7 <dataSource type="POOLED"> 8 <property name="driver" value="com.mysql.jdbc.Driver" /> 9 <property name="url" value="jdbc:mysql://localhost:3306/mybatis" /> 10 <property name="username" value="root" /> 11 <property name="password" value="000000" /> 12 </dataSource> 13 </environment> 14 </environments> 15 <mappers> 16 <mapper resource="com/hjj/dao/userMapper.xml"/> 17 </mappers> 18 </configuration>
7. userMapper.xml
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> 3 <mapper namespace="com.hjj.dao.userMapper"> 4 <select id="getUser" resultType="com.hjj.model.User"> 5 select * from user; 6 </select> 7 8 <insert id="insertUser" parameterType="com.hjj.model.User"> 9 insert into user (username,password) values (#{username},#{password}); 10 </insert> 11 </mapper>
8 .User.java
1 package com.hjj.model; 2 3 public class User { 4 5 private int id; 6 private String username; 7 private String password; 8 9 public User(int id, String username, String password) { 10 super(); 11 this.id = id; 12 this.username = username; 13 this.password = password; 14 } 15 public User() { 16 super(); 17 // TODO Auto-generated constructor stub 18 } 19 20 public int getId() { 21 return id; 22 } 23 public void setId(int id) { 24 this.id = id; 25 } 26 public String getUsername() { 27 return username; 28 } 29 public void setUsername(String username) { 30 this.username = username; 31 } 32 public String getPassword() { 33 return password; 34 } 35 public void setPassword(String password) { 36 this.password = password; 37 } 38 39 @Override 40 public String toString() { 41 return "User [id=" + id + ", username=" + username + ", password=" + password + "]"; 42 } 43 }
9. UserAction.java
1 package com.hjj.action; 2 3 import java.io.IOException; 4 import java.util.ArrayList; 5 import java.util.List; 6 7 import com.hjj.dao.MysqlDAO; 8 import com.hjj.model.*; 9 import com.opensymphony.xwork2.ActionSupport; 10 import com.opensymphony.xwork2.ModelDriven; 11 12 public class UserAction extends ActionSupport implements ModelDriven<User>{ 13 private User user = null; 14 List<User> users = new ArrayList<User>(); 15 16 17 public List<User> getUsers() { 18 return users; 19 } 20 21 public void setUsers(List<User> users) { 22 this.users = users; 23 } 24 25 public String add() throws IOException{ 26 System.out.println(user); 27 MysqlDAO dao = new MysqlDAO(); 28 dao.insertUser(user); 29 return "add"; 30 } 31 32 public String get() throws IOException{ 33 MysqlDAO dao = new MysqlDAO(); 34 users = dao.getUsers(); 35 return "get"; 36 } 37 38 39 public User getModel() { 40 if(user == null){ 41 user = new User(); 42 } 43 return user; 44 } 45 46 }
10 . MysqlDAO.java
1 package com.hjj.dao; 2 3 import java.io.IOException; 4 import java.io.Reader; 5 import java.util.ArrayList; 6 import java.util.List; 7 8 import org.apache.ibatis.io.Resources; 9 import org.apache.ibatis.session.SqlSession; 10 import org.apache.ibatis.session.SqlSessionFactory; 11 import org.apache.ibatis.session.SqlSessionFactoryBuilder; 12 13 import com.hjj.model.User; 14 15 public class MysqlDAO { 16 17 private SqlSessionFactory sessionFactory = null; 18 private SqlSession session = null; 19 20 public MysqlDAO() throws IOException{ 21 String resource = "conf.xml"; 22 23 Reader reader = Resources.getResourceAsReader(resource); 24 25 sessionFactory = new SqlSessionFactoryBuilder().build(reader); 26 27 } 28 public List<User> getUsers(){ 29 30 List<User> users = new ArrayList<User>(); 31 32 session = sessionFactory.openSession(); 33 34 String statement = "com.hjj.dao.userMapper.getUser"; 35 36 users = session.selectList(statement); 37 38 session.commit(); 39 40 return users; 41 } 42 43 public void insertUser(User user){ 44 45 session = sessionFactory.openSession(); 46 47 String statement = "com.hjj.dao.userMapper.insertUser"; 48 49 int row = session.insert(statement, user); 50 session.commit(); 51 System.out.println(row); 52 } 53 }
四.运行代码。
1.地址栏输入：http://localhost:8080/MybatisAndStruts/index.jsp。显示页面如下(页面简单丑陋)。
第一个文本输入框为用户名，第二个为密码。
2. 提交后页面显示
3.返回index.jsp。点击查询。显示列表。
至此，所有的代码和测试已经写完了。这应该算是很简单的一个mybatis和struts的整合了，就当做入门练习了。至于里面的一些东西，例如ModelDriven,和user/user!add这些东西，学过struts2的人应该都知道。不过为了自己能够更深刻的理解，在明天我也会做出总结。