SpringBoot2 学习3 集成JPA

雨点打透心脏的1/2处 2021-09-30 14:42 389阅读 0赞

# 通过配置文件设置 项目的端口和名字 #

*  代码结构  
    \-![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2gzNTYzNjM_size_16_color_FFFFFF_t_70]
 *  /SpringBootBasic/src/main/resources/application.properties

//设置项目的端口号
    server.port=9080
    //设置工程名字
    //  所有路径都需要加a.   http:localhost:9080/a/all 
    server.servlet.context-path=/a

# 通过Spring的IOC 控制反转 管理对象 #

*  service 类上加注解 @Service
 *  Controller类使用的时候，通过注解@Resource  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2gzNTYzNjM_size_16_color_FFFFFF_t_70 1]

package com.zz.controller;
    
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import javax.annotation.Resource;
    import javax.servlet.http.HttpServletRequest;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import com.zz.entity.User;
    import com.zz.service.UserService;
    
    @RestController
    //在类的上面，配置一个拦截路径，那么这个类里面所有方法的
    //路径前面，必须加上这个us2. 避免和其他类的路径重复
    @RequestMapping("us2")
    public class UserController2 {
    	//使用spring的ioc 控制反转。让spring容器帮我们创建对象
    	@Resource
    	UserService us;
    	
    	//拦截路径是：http://localhost:9080/a/us2/all
    	@RequestMapping("all")
    	public List<User> getAll(){
    		List<User> userlist=us.selectAll();
    		return userlist;
    	}
    	
    	@RequestMapping("delete")
    	public Map remove(HttpServletRequest request){
    		String id=request.getParameter("uid");
    		boolean rs=us.deleteById(id);
    		Map map=new HashMap();
    		map.put("result", rs);
    		return map;
    	}
    
    }

# 开始集成JAP #

*  终项目工程结构  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2gzNTYzNjM_size_16_color_FFFFFF_t_70 2]
 *  POM 配置需要的包

<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>
      <parent>
        <groupId>zz</groupId>
        <artifactId>SpringBoot2</artifactId>
        <version>0.0.1-SNAPSHOT</version>
      </parent>
      <artifactId>SpringBootJPA</artifactId>
      <packaging>war</packaging>
    <dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    		
    		
            <dependency> <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <optional>true</optional>
            </dependency>
            
             
    		<dependency>
    		    <groupId>mysql</groupId>
    		    <artifactId>mysql-connector-java</artifactId>
    		    <version>8.0.15</version>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-data-jpa</artifactId>
    		</dependency>
    		
    	</dependencies>
      
    <repositories>
            <repository>
                <id>alimaven</id>
                <name>aliyun maven</name>
                <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
            </repository>
        </repositories>
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    </project>

*  /SpringBootJPA/src/main/resources/application.properties

//设置项目的端口号
    server.port=9081
    //设置工程名字
    server.servlet.context-path=/b
    
    // 数据库的信息
    spring.datasource.url = jdbc:mysql://localhost:3306/java10?useSSL=false&serverTimezone=Asia/Shanghai
    spring.datasource.username = root
    spring.datasource.password = Java20190713*yy
    spring.datasource.driverClassName = com.mysql.cj.jdbc.Driver
    spring.jpa.database = MYSQL
    spring.jpa.show-sql = true
    spring.jpa.hibernate.ddl-auto = update

*  实体类Entity

package com.zz.entity;
    
    import java.sql.Date;
    
    import javax.persistence.Column;
    import javax.persistence.Entity;
    import javax.persistence.Id;
    
    @Entity
    public class OrderMaster {
    	
    	@Id
    	@Column(length=50)
    	private String id;
    	
    	private String name;
    	private double total;
    	private String address;
    	private Date createTime;
    	public String getId() {
    		return id;
    	}
    	public void setId(String id) {
    		this.id = id;
    	}
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public double getTotal() {
    		return total;
    	}
    	public void setTotal(double total) {
    		this.total = total;
    	}
    	public String getAddress() {
    		return address;
    	}
    	public void setAddress(String address) {
    		this.address = address;
    	}
    	public Date getCreateTime() {
    		return createTime;
    	}
    	public void setCreateTime(Date createTime) {
    		this.createTime = createTime;
    	}
    	
    	
    
    }

*  Repository

package com.zz.repository;
    
    import org.springframework.data.jpa.repository.JpaRepository;
    import org.springframework.data.repository.CrudRepository;
    
    import com.zz.entity.OrderMaster;
    
    public interface OrderMasterRepository extends  CrudRepository<OrderMaster,String>{
    
    }

*  Service

package com.zz.service;
    
    import javax.annotation.Resource;
    
    import org.springframework.stereotype.Service;
    
    import com.zz.entity.OrderMaster;
    import com.zz.repository.OrderMasterRepository;
    
    @Service
    public class OrderService {
    	@Resource
    	OrderMasterRepository masterRepository;
    	
    	public OrderMaster addmaster(OrderMaster master){
    		
    		return masterRepository.save(master);
    	}
    
    }

*  controller

package com.zz.controller;
    
    import javax.annotation.Resource;
    import javax.servlet.http.HttpServletRequest;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import com.zz.entity.OrderMaster;
    import com.zz.service.OrderService;
    import com.zz.util.KeyUtil;
    
    @RestController
    @RequestMapping("ordermaster")
    public class OrderController {
    	@Resource
    	OrderService orderService;
    	//测试地址：http://localhost:9081/b/ordermaster/add?address=ddd&name=jacky
    	@RequestMapping("add")
    	public OrderMaster save(HttpServletRequest request){
    		String address=request.getParameter("address");
    		String name=request.getParameter("name");
    		OrderMaster master=new OrderMaster();
    		master.setId(KeyUtil.genUniqueKey());
    		master.setAddress(address);
    		master.setName(name);
    		
    		return orderService.addmaster(master);
    	}
    
    }

# 测试 #

![在这里插入图片描述][201908052152484.png]

![在这里插入图片描述][20190805215302679.png]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2gzNTYzNjM_size_16_color_FFFFFF_t_70]: /images/20210726/d8fa1bf4e1ff4467b3eecca7690404c3.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2gzNTYzNjM_size_16_color_FFFFFF_t_70 1]: /images/20210726/fe17c1e168cf4f1fa4aa96355ece4d14.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2gzNTYzNjM_size_16_color_FFFFFF_t_70 2]: /images/20210726/2ebf67fb37994f68958fd136234533bd.png
[201908052152484.png]: /images/20210726/75c73f0a61e54b14914484085239fdff.png
[20190805215302679.png]: /images/20210726/5206e534392b4174a0cc78e4dec0d4f7.png