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。
时间： 2024-08-02 04:23:46