Idea搭建Spring Boot框架，结合jpa实现增删改查

　　Spring Boot出来很久了，也用了很久了，虽然用的时候也用的挺方便的，但毕竟那个框架不是自己搭的，再怎么运用也不如自己搭建个，在搭的过程中，还是踩了些小坑，下面则是搭建的过程：

　　打开idea，File--> New--> Project -->Maven -->Next --> Next -->Finish

 

 

 

 

 

建立项目之后，按照下面的目录依次搭建：

 

 pom.xml文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<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.test.demo</groupId>
    <artifactId>demo002</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <!--<artifactId>spring-boot-starter-parent</artifactId>-->
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <!-- jpa：将对象映射到关系数据库 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <!-- web核心包 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--  mysql  -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
    </dependencies>
    <!-- 不同的环境，可以在不同的环境下分开，连接不同的数据库 -->
    <profiles>
        <profile>
            <id>dev</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <active.profile>dev</active.profile>
            </properties>
        </profile>
        <profile>
            <id>product</id>
            <properties>
                <active.profile>product</active.profile>
            </properties>
        </profile>
    </profiles>
    <build>
        <filters>
            <filter>config_filters/filter-${active.profile}.properties</filter>
        </filters>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.2</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>utf-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

 

 

application.properties 文件如下：

server.port=8025

spring.datasource.max-idle=10
spring.datasource.max-wait=10000
spring.datasource.min-idle=1
spring.datasource.initial-size=1
spring.datasource.validation-query=SELECT 1
spring.datasource.test-on-borrow=false
spring.datasource.test-while-idle=true
spring.datasource.time-between-eviction-runs-millis=18800

spring.datasource.url=@db.dyh2020.url@
spring.datasource.username=@db.dyh2020.username@
spring.datasource.password=@db.dyh2020.password@
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

spring.jpa.database=MYSQL
# 显示后台处理的SQL语句
spring.jpa.show-sql=true
# 自动检查实体和数据库表是否一致，如果不一致则会进行更新数据库表
spring.jpa.hibernate.ddl-auto=none

Main.java文件如下：

package com.test.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;

@EnableAutoConfiguration
@ComponentScan(basePackages = "/com.test.demo")
public class Main {

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

}

DemoController.java文件：

package com.test.demo.controllers;

import com.test.demo.domain.entities.Address;
import com.test.demo.domain.entities.AddressRepository;
import com.test.demo.services.DemoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
@RequestMapping("/hello")
public class DemoController {

    @Autowired
    private DemoService demoService;

    @Autowired
    private AddressRepository addressRepository;

    /**
     * RequestParam 参数里面的name和value的效果是一样的
     * RequestMapping 参数里面就只能是value了，
     * @param name
     * @return
     */
    @RequestMapping(value = "/demo")
    public String demo(@RequestParam(name = "name")String name, @RequestParam(value = "id")int id){
        return "hello "+ name+"\t"+id;
    }

    /**
     * RequestParam 参数里面的name和value的效果是一样的
     * RequestMapping 参数里面就只能是value了，
     * @param name
     * @return
     */
    @RequestMapping(value = "/queryaddress")
    public String demo(@RequestParam(name = "name")String name){
        List<Address> addressList = demoService.queryAddress("%"+name+"%");
        List<Address> addressList2 = addressRepository.queryListByName("%"+name+"%");
        System.out.println(addressList.toString());
        System.out.println(addressList2.toString());
        return addressList.toString();
//        return "wolaile";
    }


    /**
     * 查找
     * @param id
     * @return
     */
    @RequestMapping("/query")
    public String query(@RequestParam(name = "id")int id){
        Address a =  demoService.findById(id);
        return a==null?"没有符合查找的东西":a.toString();
    }

    /**
     * 查找
     * @param id
     * @return
     */
    @RequestMapping("/update")
    public String query(@RequestParam(name = "id")int id,@RequestParam(name = "address")String address){
        Address a =  demoService.updateName(id,address);
        return  a==null?"什么也没有":a.toString();
    }
}

DemoService.java文件如下：

package com.test.demo.services;

import com.test.demo.domain.entities.Address;
import com.test.demo.domain.entities.AddressRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class DemoService {

 @Autowired
 private AddressRepository addressRepository;

 /**
 * 根据名称查找地区
 * @param name
 * @return
 */
 public List<Address> queryAddress(String name){
 return addressRepository.queryListByName(name);
 }


 public Address findById(int id){
 return addressRepository.findOne(id);
 }

 public Address updateName(int id, String address){
 Address a = addressRepository.findOne(id);
 if (a!=null){
 a.setAddress(address);
 addressRepository.save(a);
 return a;
 }else
 return null;
 }

}

Address.java实体如下：

package com.test.demo.domain.entities;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import java.util.Date;
@Entity
@Table(name = "address")
public class Address {

    /**
     * 主键
     */
    @Id
    private Integer id;
    /**
     * 省
     */
    @Column(name = "province", nullable = false)
    private String province;
    /**
     * 市
     */
    @Column(name = "city", nullable = false)
    private String city;
    /**
     * address
     */
    @Column(name = "address", nullable = false)
    private String address;
    /**
     * 创建时间
     */
    @Column(name = "create_time", nullable = false)
    private Date createTime;
    /**
     * 创建时间
     */
    @Column(name = "update_time", nullable = false)
    private Date updateTime;
    /**
     * contact
     */
    @Column(name = "contact", nullable = false)
    private String contact;
    /**
     * appellation
     */
    @Column(name = "appellation", nullable = false)
    private String appellation;
    /**
     * deleted
     */
    @Column(name = "deleted", nullable = false)
    private Boolean deleted;
    /**
     * deleted
     */
    @Column(name = "mobile", nullable = false)
    private String mobile;
    /**
     * status
     */
    @Column(name = "status", nullable = false )
    private Integer status;
    /**
     * user_id
     */
    @Column(name = "user_id", nullable = false )
    private Integer userId;
    /**
     * province_id
     */
    @Column(name = "province_id", nullable = false )
    private Integer provinceId;
     /**
     * city_id
     */
    @Column(name = "city_id", nullable = false )
    private Integer cityId;
    /**
     * area_id
     */
    @Column(name = "area_id", nullable = false )
    private Integer areaId;


    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getProvince() {
        return province;
    }

    public void setProvince(String province) {
        this.province = province;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    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;
    }

    public Date getUpdateTime() {
        return updateTime;
    }

    public void setUpdateTime(Date updateTime) {
        this.updateTime = updateTime;
    }

    public String getContact() {
        return contact;
    }

    public void setContact(String contact) {
        this.contact = contact;
    }

    public String getAppellation() {
        return appellation;
    }

    public void setAppellation(String appellation) {
        this.appellation = appellation;
    }

    public Boolean getDeleted() {
        return deleted;
    }

    public void setDeleted(Boolean deleted) {
        this.deleted = deleted;
    }

    public String getMobile() {
        return mobile;
    }

    public void setMobile(String mobile) {
        this.mobile = mobile;
    }

    public Integer getStatus() {
        return status;
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    public Integer getUserId() {
        return userId;
    }

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

    public Integer getProvinceId() {
        return provinceId;
    }

    public void setProvinceId(Integer provinceId) {
        this.provinceId = provinceId;
    }

    public Integer getCityId() {
        return cityId;
    }

    public void setCityId(Integer cityId) {
        this.cityId = cityId;
    }

    public Integer getAreaId() {
        return areaId;
    }

    public void setAreaId(Integer areaId) {
        this.areaId = areaId;
    }

    @Override
    public String toString() {
        return "Address{" +
                "id=" + id +
                ", province='" + province + '\'' +
                ", city='" + city + '\'' +
                ", address='" + address + '\'' +
                ", createTime=" + createTime +
                ", updateTime=" + updateTime +
                ", contact='" + contact + '\'' +
                ", appellation='" + appellation + '\'' +
                ", deleted=" + deleted +
                ", mobile='" + mobile + '\'' +
                ", status=" + status +
                ", userId=" + userId +
                ", provinceId=" + provinceId +
                ", cityId=" + cityId +
                ", areaId=" + areaId +
                '}';
    }
}

AddressRepository.java 文件如下：

package com.test.demo.domain.entities;

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

import java.util.List;


public interface AddressRepository extends JpaRepository<Address, Integer>{

    @Query(value = "select * from address where address like ?",nativeQuery = true)
    List<Address> queryListByName(String name);
}

数据库连接文件eg：filter-dev.properties文件

# 数据库连接
db.dyh2020.url=jdbc:mysql://127.0.0.1:3306/dyh_test?characterEncoding=utf8&useSSL=false&useOldAliasMetadataBehavior=true&autoReconnect=true
db.dyh2020.username=root
db.dyh2020.password=admin
#日志级别
#logging.level.root=ERROR

发布之后：

 

发布之后在浏览器访问：http://localhost:8025/hello/query?id=5

git地址：https://github.com/DYH2020/springBootDemo/tree/master/demo002