Struts2+Mybatis整合實現註冊登入功能
阿新 • • 發佈：2019-02-17
1.要實現框架之間的整合，第一
2.接下來先配置Struts2的核心控制器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"> <display-name></display-name> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
核心控制器中的程式碼去官方文件中直接摘抄即可。
3.接下來，我們需要一個Po類，簡單的在其中定義id，使用者名稱和密碼即可
package com.guanglan.po; public class User { private int id; private String uname; private String pwd; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUname() { return uname; } public void setUname(String uname) { this.uname = uname; } public String getPwd() { return pwd; } public void setPwd(String pwd) { this.pwd = pwd; } }
4.匯入Struts.xml配置檔案
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <constant name="struts.enable.DynamicMethodInvocation" value="true" /> <constant name="struts.devMode" value="true" /> <constant name="struts.i18n.encoding" value="UTF-8" /> </struts>
開啟動態方法，開發者模式，其餘使用註解
5.建立一個Action類，並引入User，實現其get，set方法
public class regAction {
private User user;
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}6.建立JSP檔案，並寫表單，從jsp檔案中傳入資料至action中。
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Welcome Reg My WebSite</title>
</head>
<body>
<form action="guanglan!reg.action">
使用者名稱:<input type="text" name=user.uname><br/>
密碼:<input type="password" name=user.pwd><br/>
提交:<input type="submit" value="提交"/>
</form>
</body>
</html>在action中定義一個reg方法來接收表單資料，同理定義login方法接收表單資料。
public String reg() throws IOException{
return "ok";
}
public String login() throws Exception{
}7.下面我們來實現一下mybatis
先在src下匯入mybatis.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>
<typeAlias type="com.guanglan.po.User" alias="User"/>
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql:///my_zh" />
<property name="username" value="root" />
<property name="password" value="123456" />
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com/guanglan/Mapper/TestMapper.xml"/>
</mappers>
</configuration>8.新建立一個查詢關係對映sql語句的包
然後建立一個mapper.xml配置檔案，在其中寫入你需要用到的查詢語句
<?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">
<!-- sql 對映檔案 -->
<mapper namespace="com.mybatis.Hello">
<select id="selectAll" parameterType="map" resultType="User">
select * from t_user where uname=#{un} and pwd=#{pwd}
</select>
<insert id="insertUser" parameterType="User">
insert into t_user(uname,pwd) values(#{uname},#{pwd})
</insert>
</mapper>9.建立一個Service類
package com.guanglan.Service;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import com.guanglan.po.User;
public class UserService {
public static void add(String name,String password) throws IOException{
SqlSessionFactory ssf= new SqlSessionFactoryBuilder().build(Resources.getResourceAsReader("mybatis.xml"));
SqlSession sqlsession=ssf.openSession();
User u = new User();
u.setUname(name);
u.setPwd(password);
sqlsession.insert("com.mybatis.Hello.insertUser",u);
sqlsession.commit();
}
public static User add1(String name,String password) throws Exception{
SqlSessionFactory ssf= new SqlSessionFactoryBuilder().build(Resources.getResourceAsReader("mybatis.xml"));
SqlSession session=ssf.openSession();
Map<String,Object> map= new HashMap<String,Object>();
map.put("un",name);
map.put("pwd",password);
User datas=session.selectOne("com.mybatis.Hello.selectAll",map);
if(datas!=null){
return datas;
}
else
return null;
}
}
10.在action中呼叫Service中的方法，傳入值到Service中，執行session.selectOne,以及session.insert方法來查詢和往資料庫中寫入資料。並且返回一個User物件在action的login方法中，如果物件不是空，證明在資料庫中查詢到了資料，登入成功。如果為空，那麼登入失敗。
package com.guanglan.reg.action;
import java.io.IOException;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;
import com.guanglan.Service.*;
import com.guanglan.po.User;
@Action("guanglan")
@Results({
@Result(name="ok",location="/reg-ok.jsp"),
@Result(name="success",location="/login-ok.jsp"),
@Result(name="error",location="/login-error.jsp")
})
public class regAction {
private User user;
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public String reg() throws IOException{
UserService.add(user.getUname(), user.getPwd());
return "ok";
}
public String login() throws Exception{
User uu =UserService.add1(user.getUname(), user.getPwd());
if(uu==null){
return "error";
}else
return "success";
}
}只是簡單的總結了一下，本人也是java小白。