話不多說開整
1.項目結構
2.配置文件
a.web.xml
b.springmvc.xml
c.sqlmapper.xml（雞肋雞肋）
d.applicationContext-dao.xml
e.applicationContext-service.xml
f.applicationContext-trans.xml
3.pojo實體類（數據庫就省了吧！）
package com.ithyl.pojo;
public class User {
private int id;
private String username;
private String password;
private String address;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
4.dao與數據庫建立聯繫
a...
package com.ithyl.mapper;
import com.ithyl.pojo.User;
public interface UserDao {
public User selectByUN(String username);
public User selectByPW(String password);
}
b:
<?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用於與DAO層的接口類進行綁定,這樣我們無需實現DAO層的接口
類,其接口類就能夠自動的找到相關的SQL語句進行綁定實現-->
<mapper namespace="com.ithyl.mapper.UserDao">
<!--select表示查詢,它的id名稱必須與DAO層接口的方法名相同,否則無法綁定-->
<select id="selectByUN" parameterType="string" resultType="com.ithyl.pojo.User">
select * from tb_user where username = #{username}
</select>
<select id="selectByPW" parameterType="int" resultType="com.ithyl.pojo.User">
select * from tb_user where password= #{password}
</select>
</mapper>
5.service業務層先來個藉口寫抽象方法
package com.ithyl.service;
public interface UserService {
public boolean login(String username,String password);
}
在寫個實現類、、、、、、、、、、、、
package com.ithyl.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.ithyl.mapper.UserDao;
import com.ithyl.pojo.User;
//@Service("UserService") 註解用於標示此類爲業務層組件,在使用時會被註解的類會自動由
//spring進行注入,無需我們創建實例
@Service("UserService")
public class UserServiceImpl implements UserService {
//自動注入iuserdao 用於訪問數據庫
@Autowired
UserDao Mapper;
//登錄方法的實現,從jsp頁面獲取username與password
public boolean login(String username, String password) {
// System.out.println("輸入的賬號:" + username + "輸入的密碼:" + password);
//對輸入賬號進行查詢,取出數據庫中保存對信息
User user = Mapper.selectByUN(username);
if (user != null) {
// System.out.println("查詢出來的賬號:" + user.getUsername() + "密碼:" + user.getPassword());
// System.out.println("---------");
if (user.getUsername().equals(username) && user.getPassword().equals(password))
return true;
}
return false;
}
}
6.業務當然要有控制類controller來控制
package com.ithyl.controller;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import com.ithyl.pojo.User;
import com.ithyl.service.UserService;
//@Controller註解用於標示本類爲web層控制組件
@Controller
//@RequestMapping("/user")用於標定訪問時對url位置
//@RequestMapping("/user")
//在默認情況下springmvc的實例都是單例模式,所以使用scope域將其註解爲每次都創建一個新的實例
@Scope("prototype")
public class Login {
//自動注入業務層的userService類
@Autowired
UserService userService;
//login業務的訪問位置爲/user/login
@RequestMapping("/login")
public String login(User user,HttpServletRequest request){
//調用login方法來驗證是否是註冊用戶
boolean loginType = userService.login(user.getUsername(),user.getPassword());
if(loginType){
//如果驗證通過,則將用戶信息傳到前臺
request.setAttribute("user",user);
//並跳轉到success.jsp頁面
return "success";
}else{
//若不對,則將錯誤信息顯示到錯誤頁面
request.setAttribute("message","用戶名密碼錯誤");
return "error";
}
}、
jsp就算了吧！！！！