JavaWeb：（练习）十八、Spring学习练习四

一、学习目标二、controller包

UserController 三、dao包

UserDao 四、model包

User 五、service包

UserService 六、filter包七、common包八、配置文件

1、pom.xml2、config.properties3、db.xml4、mybatis.xml5、spring.xml6、spring_mybatis.xml7、springmvc.xml8、UserMapper

JavaWeb：（练习）十八、Spring学习练习四一、学习目标

初次接触Spring框架，学习了Spring的基础，基本了解了Spring的作用和优缺点。

搭建了第一个Spring项目，导入Spring配置文件，学习并练习了IOC控制反转，并且进行Spring Bean管理，以xml配置方式和注解方式分别实现。并且练习了Spring JDBC。由此完成了spring练习一

JavaWeb：（练习）十五、Spring学习练习一

在练习一的基础上，学习并练习了Spring AOP、Spring事务管理等。以下是在练习一的基础上，所改变的练习代码。

JavaWeb：（练习）十六、Spring学习练习二

在练习一、练习二的基础上，继续学习。练习了spring集成mybatis，并且测试前端发送数据到后端。

JavaWeb：（练习）十七、Spring学习练习三

学习前后端交互，修改后一下代码如下

注：并未附上前端代码，在JavaWeb系列中包含前端文件

二、controller包 UserController

package com.ffyc.ssm.controller;

import com.ffyc.ssm.common.CommonResult;
import com.ffyc.ssm.model.User;
import com.ffyc.ssm.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpSession;



// @Controller
@RestController
@RequestMapping(value = "/userCtl")
public class UserController {

    @Autowired
    UserService userService;

    
    // @ResponseBody
    @RequestMapping(value = "/login")
    public CommonResult login(User user, HttpSession session) {
        try{
            System.out.println(user);
            System.out.println("---------");
            User u = userService.login(user);
            System.out.println(u);

            if (u != null) {
                session.setAttribute("user", u);
                return new CommonResult("登陆成功", 200, u);
            } else {
                return new CommonResult("账号或密码错误", 202, null);
            }
        } catch (Exception e) {
            return new CommonResult("系统错误", 500, null);
        }
    }

    @RequestMapping(value = "/logOut")
    public CommonResult logOut(User user, HttpSession session) {
        return new CommonResult("退出成功", 200, null);
    }
}

三、dao包 UserDao

package com.ffyc.ssm.dao;

import com.ffyc.ssm.model.User;
import org.springframework.stereotype.Repository;

public interface UserDao {

    User login(User user);
}

四、model包 User

package com.ffyc.ssm.model;

import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.stereotype.Repository;

import java.util.Date;

@Repository(value = "user")
public class User {

    private Integer userId;
    private String userAccount;
    private String userPassword;
    

    public User() {
    }

    public User(Integer userId, String userAccount, String userPassword) {
        this.userId = userId;
        this.userAccount = userAccount;
        this.userPassword = userPassword;
    }

    

    public Integer getUserId() {
        return userId;
    }

    public void setUserId(Integer userId) {
        this.userId = userId;
    }

    public String getUserAccount() {
        return userAccount;
    }

    public void setUserAccount(String userAccount) {
        this.userAccount = userAccount;
    }

    public String getUserPassword() {
        return userPassword;
    }

    public void setUserPassword(String userPassword) {
        this.userPassword = userPassword;
    }

    

    @Override
    public String toString() {
        return "User{" +
                "userId=" + userId +
                ", userAccount='" + userAccount + ''' +
                ", userPassword='" + userPassword + ''' +
                '}';
    }

    
}

五、service包 UserService

package com.ffyc.ssm.service;

import com.ffyc.ssm.dao.UserDao;
import com.ffyc.ssm.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service(value = "userService")
@Transactional
public class UserService {

    @Autowired
    UserDao userDao;

    
    public User login(User user) {
        return userDao.login(user);
    }
}

六、filter包

package com.ffyc.ssm.filter;


import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class CorsFilter implements Filter {
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
            throws IOException, ServletException {
        HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;
        HttpServletRequest httpRequest = (HttpServletRequest) servletRequest;
        //允许携带cookie时不能设置为* 否则前端报错
        httpResponse.setHeader("Access-Control-Allow-Origin", httpRequest.getHeader("origin"));//允许所有请求跨域
        httpResponse.setHeader("Access-Control-Allow-Methods", "*");//允许跨域的请求方法GET, POST, HEAD 等
        httpResponse.setHeader("Access-Control-Allow-Headers", "*");//允许跨域的请求头
        httpResponse.setHeader("Access-Control-Allow-Credentials", "true");//是否携带cookie

        filterChain.doFilter(servletRequest, servletResponse);
    }
}

七、common包

package com.ffyc.ssm.common;

public class CommonResult {

    // 消息
    String message;
    // 状态码
    int code;
    // 数据
    T data;

    public CommonResult() {
    }

    public CommonResult(String message, int code, T data) {
        this.message = message;
        this.code = code;
        this.data = data;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }
}

八、配置文件 1、pom.xml



    4.0.0

    com.example
    ssm
    1.0-SNAPSHOT
    ssm
    war

    
        1.8
        1.8
        5.6.2
    

    
        
        
            org.springframework
            spring-context
            5.2.2.RELEASE
        

        
        
            com.alibaba
            druid
            1.1.10
        

        
        
            mysql
            mysql-connector-java
            8.0.28
        

        
        
            org.springframework
            spring-jdbc
            5.2.2.RELEASE
        

        
            org.springframework
            spring-aspects
            5.2.2.RELEASE
        

        
        
            org.mybatis
            mybatis-spring
            1.3.1
        

        
        
            org.mybatis
            mybatis
            3.4.2
        

        
        
            org.springframework
            spring-webmvc
            5.2.2.RELEASE
        

        
        
            com.google.code.gson
            gson
            2.9.0
        

        
        
            javax.servlet
            javax.servlet-api
            4.0.1
            provided
        

    

    
        
            
                org.apache.maven.plugins
                maven-war-plugin
                3.3.0

2、config.properties

dirverClassName=com.mysql.cj.jdbc.Driver
url = jdbc:mysql://127.0.0.1:3306/ffycdb?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai
uname = root
password = root

3、db.xml

4、mybatis.xml

5、spring.xml

6、spring_mybatis.xml

7、springmvc.xml

8、UserMapper





    
        select * from user
        where user_account = #{userAccount} and user_password = #{userPassword}

JavaWeb：（练习）十八、Spring学习练习四

Java相关栏目本月热门文章