SpringBoot学习第一章入门

最新推荐文章于 2024-11-12 08:40:06 发布

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最新推荐文章于 2024-11-12 08:40:06 发布

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分类专栏： SpringBoot 文章标签： SpringBoot

本文链接：https://blog.youkuaiyun.com/qq_41103860/article/details/90675390

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该博客围绕SpringBoot项目开发展开，介绍了使用的知识，包括SpringBoot、JPA、thymeleaf、EasyUI等。详细阐述了项目的目录结构、POM.xml和application.proerties配置，还涉及前端页面、实体类、持久层、业务逻辑层、控制层等的开发，最后给出测试类、启动类及运行结果。

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中间件接口

使用知识

SpringBoot
JPA
thymeleaf
EasyUI

目录结构

在这里插入图片描述

POM.xml配置

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.fuju</groupId>
  <artifactId>23-spring-boot-jpa</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  
  <parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.20.RELEASE</version>
	</parent>
	
	<dependencies>
		<!-- springboot的启动器 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!-- springboot的启动器 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</artifactId>
		</dependency>
		
		<!-- JPA-->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
		
		<!-- 测试工具启动器 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
		</dependency>
		
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.0.9</version>
		</dependency>
	</dependencies>
  
</project>

application.proerties配置

#mysql数据库连接信息
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/数据库名称?useUnicode=true&characterEncoding=utf8
spring.datasource.username=用户名
spring.datasource.password=密码

#连接池信息
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

#配置正向工程
spring.jpa.hibernate.ddl-auto=update
#在控制台输出sql语句
spring.jpa.show-sql=true

前段页面

index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<link  rel="stylesheet" type="text/css"  th:href="@{/jquery-easyui-1.7.0/themes/default/easyui.css}" />
<link  rel="stylesheet" type="text/css" th:href="@{/jquery-easyui-1.7.0/themes/icon.css}" />   
<script type="text/javascript" th:src="@{jquery-easyui-1.7.0/jquery.min.js}"></script>   
<script type="text/javascript" th:src="@{/jquery-easyui-1.7.0/jquery.easyui.min.js}"></script>
<script type="text/javascript">
	$(function(){
		 $("#login_submit").click(function(){
			 $('#login_form').form('submit', {    
			     url:"login",    
			     onSubmit: function(){    
			       if($(":text:eq(0)").val()==""){
			    	   $.messager.alert('系统信息','用户名不能为空 ');
			    	   return false;
			       }else if($(":password:eq(0)").val()==""){
			    	   $.messager.alert('系统信息','密码不能为空 ');
			    	   return false;
			       }
			     },    
			     success:function(data){    
			         //alert(data)
			         if(data=="1"){
			        	 location.href="main.html";
			         }else{
			        	 $.messager.alert('系统信息','登录失败 ');  
			         }
			     }    
			 });  

		 });
	});
</script>
</head>
<body style="background-color: #e9f1ff">
<div style="margin: 100px auto;width: 400px">
<div id="p" class="easyui-panel" title="登录"     
        style="width:400px;height:230px;padding:10px;background:#fafafa;"   
       ><!--  data-options="iconCls:'icon-save'" -->
        <form action="login" method="post" id="login_form">
        	<table width="230"  align="center">
        		<tr>
        			<td colspan="2" style="text-align: center;font-size: 20px;font-weight: bold;">中间件接口</td>
        		</tr>
        		<tr style="height: 40px">
        			<td>登录名</td>
        			<td><input type="text" name = "username"/></td>
        		</tr>
        		<tr style="height: 40px">
        			<td>密码</td>
        			<td><input type="password" name = "password"/></td>
        		</tr>
        		<tr>
        			<td colspan="2"  align="right"><a id="login_submit" href="#" class="easyui-linkbutton" data-options="iconCls:'icon-ok'">登录</a>  </td>
        		</tr>
        	</table>
        </form>
</div>  
</div>
</body>
</html>

实体类使用JPA正向工程生成数据库

users实体类

package com.fuju.po;

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


/**
 * 用户实体类
 * @author Administrator
 *
 */
@Entity
@Table(name="t_users")
public class Users {
	
	@Id//主键
	@GeneratedValue(strategy=GenerationType.IDENTITY)//自增长
	@Column(name="id")//字段名
	private Integer id;
	@Column(name="username")//字段名
	private String username;
	@Column(name="password")//字段名
	private String password;
	public Integer getId() {
		return id;
	}
	public void setId(Integer 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;
	}
	@Override
	public String toString() {
		return "Users [id=" + id + ", username=" + username + ", password=" + password + "]";
	}

}

持久层

UserRepository

package com.fuju.dao;

import java.util.List;

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

import com.fuju.po.Users;

/**
 * 用户持久层
 * @author Administrator
 *
 */
public interface UserRepository extends Repository<Users, Integer>,JpaRepository<Users, Integer>{
	@Query("from Users where username=? and password = ?")
	List<Users> findByHQL(String username, String password);
}

业务逻辑层接口及实现类

UsersService

package com.fuju.service;


import com.fuju.po.Users;

public interface UsersService {
	Users findByUsers(Users users);
}

package com.fuju.service;


import com.fuju.po.Users;

public interface UsersService {
	Users findByUsers(Users users);
}

Controlller层（控制层）

UsersController

package com.fuju.controller;

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.ResponseBody;

import com.fuju.po.Users;
import com.fuju.service.UsersService;

@Controller
public class UsersController {
	
	@Autowired
	private UsersService usersService;
	
	@RequestMapping("/login")
	@ResponseBody
	public String login(Users users) {
		Users user = usersService.findByUsers(users);
		
		if(user!=null) {
			user.setPassword("");
			session.setAttribute("user", user);
			return "1";
		}else {
			return "0";
		}
	}
}

PageController

package com.fuju.controller;

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

@Controller
public class PageController {
	
	/**
	 * 显示首页
	 * @return
	 */
	@RequestMapping("/{page}")
	public String showInfo(@PathVariable String page) {
		return page;
	}
}

测试类

UsersRepositoryTest

package com.fuju.test;


import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.fuju.App;
import com.fuju.dao.UserRepository;
import com.fuju.po.Users;
import com.fuju.service.UsersService;

/**
 * 测试类
 * @author Administrator
 *
 */
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes=App.class)
public class UsersRepositoryTest {
	@Autowired
	private UsersService usersService;
	
	@Autowired
	private UserRepository userRepository;
	
	@Test
	public void testFindByUsers() {
		Users users= new Users();
		users.setUsername("admin");
		users.setPassword("admin");
		Users user= usersService.findByUsers(users);
		System.out.println(user);
	}
	
	@Test
	public void testSave() {
		Users users=new Users();
		users.setUsername("administrator");
		users.setPassword("admin");
		userRepository.save(users);
	}
}

启动类

package com.fuju;


import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class App {
	public static void main(String[] args) {
		SpringApplication.run(App.class, args);
	}
}