Eclipse+Spring+gradle

eclipse常用快捷键

• ctrl+shfit+s:get、set方法
• shift+Alt+L：快捷生成变量

spring boot创建工具：https://start.spring.io/

修改下载依赖

repositories {
    maven{
       url 'http://maven.aliyun.com/nexus/content/groups/public/'
      
     }
}

Eclipse下载插件：

buildship、spring-tool-site

配置项目编码为UTF-8

项目配置

#服务器端口号
server.port=8080

#配置JSP视图的位置和后缀
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

#数据源配置
spring.datasource.url=jdbc:mysql://localhost:3308/registerdemo?useUnicode=true&characeterEncoding=utf-8&serverTimezone=UTC&useSSL=false&allowPublicKeyRetrieval=true
spring.datasource.username=root
spring.datasource.password=root
#spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

#Hibernate配置
spring.jpa.hibernate.ddl-auto=create
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect

配置依赖

plugins {
    id 'org.springframework.boot' version '2.1.4.RELEASE'
    id 'java'
}

apply plugin: 'io.spring.dependency-management'

group = 'com.lys'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'

repositories {
    maven{
       url 'http://maven.aliyun.com/nexus/content/groups/public/'
      
     }
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
    implementation 'org.springframework.boot:spring-boot-starter-web'
        compile 'org.springframework.boot:spring-boot-devtools'#在修改程序之后，能够自动重启服务器；修改静态文件(html、css)时不会频繁地重启服务器   

    runtime 'org.springframework.boot:spring-boot-starter-tomcat'
    runtime 'org.apache.tomcat.embed:tomcat-embed-jasper'
    runtimeOnly 'mysql:mysql-connector-java'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

项目架构

控制器

package com.lys.register.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping("/register")
public class RegisterControll {

    @RequestMapping(method=RequestMethod.GET)
    public String home(){
        return "register";
    }
}

package com.lys.register.controller;


import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.lys.register.bean.LoginFrom;
import com.lys.register.model.User;
import com.lys.register.service.UserService;

@Controller
@RequestMapping("/login")
public class LoginController {
    
    @Autowired
    UserService UserService;

    @RequestMapping(method=RequestMethod.GET)
    public String home(){
        return "login";
    }
    
    @RequestMapping(value="doLogin",method=RequestMethod.POST)
    public String doLogin(LoginFrom login,Model model,HttpSession session) {
        User user = new User(login.getName(),login.getPwd());
        System.out.println(user);
        User loginUser=UserService.checkLogin(user, model);
        if(loginUser==null) {
            return "login";
        }else {
            session.setAttribute("user", loginUser);
            return "loginSuccess";
        }
        
    }
    
    @RequestMapping(value="doLogout",method=RequestMethod.GET)
    public String doLogout(HttpSession session) {
        session.invalidate();
        return "login";
    }
}

bean文件

package com.lys.register.bean;


public class LoginFrom {

    private String name;
    private String pwd;
    
    
    public LoginFrom() {
    }
    public LoginFrom(String name, String pwd) {
        super();
        this.name = name;
        this.pwd = pwd;
        
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
    
    
}

package com.lys.register.bean;



public class RegisterFrom {

    private String name;
    private String pwd;
    private String email;
    
    public RegisterFrom() {
    }
    public RegisterFrom(String name, String pwd, String email) {
        super();
        this.name = name;
        this.pwd = pwd;
        this.email = email;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    
    
    
}

dao文件

package com.lys.register.dao;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import com.lys.register.model.User;

@Repository
public interface UserRepository extends JpaRepository {

    User findByUsername(String username);//数据库查询，约定find或get
}

model文件

package com.lys.register.model;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="user")
public class User {

    @Id
    @GeneratedValue(strategy=GenerationType.SEQUENCE)
    private Long id;
    private String username;
    private String email;
    private String password;
    
    public User() {
    }
    
    public User(String username, String email, String password) {
        super();
        
        this.username = username;
        this.email = email;
        this.password = password;
    }

    
    public User(String username, String password) {
        super();
        this.username = username;
        this.password = password;
    }


    public Long getId() {
        return id;
    }
    
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    
    
    
}

service

package com.lys.register.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.ui.Model;

import com.lys.register.dao.UserRepository;
import com.lys.register.model.User;

@Service
public class UserService {

    @Autowired
    UserRepository userRepository;
    
    public User addUser(User user,Model model) {
        try {
            User registerUser=userRepository.save(user);
            return registerUser;
        } catch (Exception e) {
             e.printStackTrace();
             model.addAttribute("error",e.getMessage());
        }
        
        return null;
    }
    
    public User checkLogin(User user,Model model) {
        User findUser = userRepository.findByUsername(user.getUsername());
        if(findUser==null) {
            model.addAttribute("error","用户名不存在");
            return null;
        }else {
            if(findUser.getPassword().equals(user.getPassword())) {
                return findUser;
            }else {
                model.addAttribute("error","用户名和密码不匹配");
                return null;
            }
        }
    }

}

jsp文件

login.jsp

<%@page import="com.lys.register.model.User"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>





    



    <%
       User user = (User)session.getAttribute("user");
      if(user==null){
          String error = (String)request.getAttribute("error");
          if(error !=null){
    %>
    

       ${error}
    
    <%
          }
    %>
       

                  用户名： 

                  密码： 
           
               

       
   <%
      }else{
          out.println("欢迎"+user.getUsername()+"退出登录");
      }
   %>

loginSuccess.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>








 

   恭喜${sessionScope.user.username}<${sessionScope.user.email}>登录成功！

register.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>








   

              用户名： 

              邮箱： 

              密码： 

           

   

registerSuccess.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>








   注册成功！转到登录

registerFailed

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>








   注册失败！失败原因 ${error}