SpringBoot整合JPA

时间：2019-10-04 19:28:09 阅读：48 评论：0 收藏：0 [点我收藏+]

首先在com.neo目录下需要创建几个包：

技术分享图片

我们需要在pom.xml文件需要加入的文件：

<?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.neo</groupId>
<artifactId>spring-boot-Jpa</artifactId>
<version>1.0.0</version>
<packaging>jar</packaging>

<name>spring-boot-Jpa</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/> 
</parent>

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>

接着，model包下，我们是创建的实体类，分别是：Address、User、UserDetail、UserInfo(接口)

Address：

package com.neo.model;

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

@Entity
public class Address {

    @Id
    @GeneratedValue
    private Long id;
    @Column(nullable = false)
    private Long userId;
    private String province;
    private String city;
    private String street;

    public Long getId() {
        return id;
    }

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

    public Long getUserId() {
        return userId;
    }

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

    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 getStreet() {
        return street;
    }

    public void setStreet(String street) {
        this.street = street;
    }
}

User：

package com.neo.model;

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

@Entity
public class User {

    @Id
    @GeneratedValue
    private Long id;
    @Column(nullable = false, unique = true)
    private String userName;
    @Column(nullable = false)
    private String passWord;
    @Column(nullable = false, unique = true)
    private String email;
    @Column(nullable = true, unique = true)
    private String nickName;
    @Column(nullable = false)
    private String regTime;

    public User() {
    }

    public User(String userName, String passWord, String email, String nickName, String regTime) {
        this.userName = userName;
        this.passWord = passWord;
        this.email = email;
        this.nickName = nickName;
        this.regTime = regTime;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long 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;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getNickName() {
        return nickName;
    }

    public void setNickName(String nickName) {
        this.nickName = nickName;
    }

    public String getRegTime() {
        return regTime;
    }

    public void setRegTime(String regTime) {
        this.regTime = regTime;
    }
}

UserDetail：

package com.neo.model;

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

@Entity
public class UserDetail {

    @Id
    @GeneratedValue
    private Long id;
    @Column(nullable = false, unique = true)
    private Long userId;
    private Integer age;
    private String realName;
    private String status;
    private String hobby;
    private String introduction;
    private String lastLoginIp;

    public Long getId() {
        return id;
    }

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

    public Long getUserId() {
        return userId;
    }

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

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getRealName() {
        return realName;
    }

    public void setRealName(String realName) {
        this.realName = realName;
    }

    public String getStatus() {
        return status;
    }

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

    public String getHobby() {
        return hobby;
    }

    public void setHobby(String hobby) {
        this.hobby = hobby;
    }

    public String getIntroduction() {
        return introduction;
    }

    public void setIntroduction(String introduction) {
        this.introduction = introduction;
    }

    public String getLastLoginIp() {
        return lastLoginIp;
    }

    public void setLastLoginIp(String lastLoginIp) {
        this.lastLoginIp = lastLoginIp;
    }

    @Override
    public String toString() {
        return "UserDetail{" +
                "id=" + id +
                ", userId=" + userId +
                ", age=" + age +
                ", realName=‘" + realName + ‘\‘‘ +
                ", status=‘" + status + ‘\‘‘ +
                ", hobby=‘" + hobby + ‘\‘‘ +
                ", introduction=‘" + introduction + ‘\‘‘ +
                ", lastLoginIp=‘" + lastLoginIp + ‘\‘‘ +
                ‘}‘;
    }
}

UserInfo：

package com.neo.model; public interface UserInfo { String getUserName(); String getEmail(); String getHobby(); String getIntroduction(); }

接着，param包下，我们是创建的实体类：UserDetailParam

UserDetailParam：

package com.neo.param;

public class UserDetailParam {
    private String userId;
    private Integer minAge;
    private Integer maxAge;
    private String realName;
    private String introduction;
    private String city;

    public String getUserId() {
        return userId;
    }

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

    public Integer getMinAge() {
        return minAge;
    }

    public void setMinAge(Integer minAge) {
        this.minAge = minAge;
    }

    public Integer getMaxAge() {
        return maxAge;
    }

    public void setMaxAge(Integer maxAge) {
        this.maxAge = maxAge;
    }

    public String getRealName() {
        return realName;
    }

    public void setRealName(String realName) {
        this.realName = realName;
    }

    public String getIntroduction() {
        return introduction;
    }

    public void setIntroduction(String introduction) {
        this.introduction = introduction;
    }

    public String getCity() {
        return city;
    }

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

接着，repository包下，我们是创建接口类：AddressRepository、UserDetailRepository、UserRepository

AddressRepository：

package com.neo.repository; import com.neo.model.Address; import org.springframework.data.jpa.repository.JpaRepository; public interface AddressRepository extends JpaRepository<Address, Long> { }

UserDetailRepository：

package com.neo.repository;

import com.neo.model.UserDetail;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;

public interface UserDetailRepository extends JpaSpecificationExecutor<UserDetail>, JpaRepository<UserDetail, Long> {
}

UserRepository：

package com.neo.repository; import com.neo.model.User; import org.springframework.data.jpa.repository.JpaRepository; public interface UserRepository extends JpaRepository<User, Long> { }

接着，service包下，我们是创建接口与类：UserDetailService(接口)、 UserDetailServiceImpl （实现类）

UserDetailService：

package com.neo.service;

import com.neo.model.UserDetail;
import com.neo.param.UserDetailParam;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;

public interface UserDetailService {
    public Page<UserDetail> findByCondition(UserDetailParam detailParam, Pageable pageable);
}

UserDetailServiceImpl

package com.neo.service;

import com.mysql.cj.util.StringUtils;
import com.neo.model.UserDetail;
import com.neo.param.UserDetailParam;
import com.neo.repository.UserDetailRepository;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.persistence.criteria.Predicate;
import java.util.ArrayList;
import java.util.List;

@Service
public class UserDetailServiceImpl implements  UserDetailService{

    @Resource
    private UserDetailRepository userDetailRepository;

    @Override
    public Page<UserDetail> findByCondition(UserDetailParam detailParam, Pageable pageable){

        return userDetailRepository.findAll((root, query, cb) -> {
            List<Predicate> predicates = new ArrayList<Predicate>();
            //equal 示例
            if (!StringUtils.isNullOrEmpty(detailParam.getIntroduction())){
                predicates.add(cb.equal(root.get("introduction"),detailParam.getIntroduction()));
            }
            //like 示例
            if (!StringUtils.isNullOrEmpty(detailParam.getRealName())){
                predicates.add(cb.like(root.get("realName"),"%"+detailParam.getRealName()+"%"));
            }
            //between 示例
            if (detailParam.getMinAge()!=null && detailParam.getMaxAge()!=null) {
                Predicate agePredicate = cb.between(root.get("age"), detailParam.getMinAge(), detailParam.getMaxAge());
                predicates.add(agePredicate);
            }
            //greaterThan 大于等于示例
            if (detailParam.getMinAge()!=null){
                predicates.add(cb.greaterThan(root.get("age"),detailParam.getMinAge()));
            }
            return query.where(predicates.toArray(new Predicate[predicates.size()])).getRestriction();
        }, pageable);

    }
}


src\main\resources目录下的application.properties配置

spring.datasource.url=jdbc:mysql://localhost:3306/test?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=true
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

spring.jpa.properties.hibernate.hbm2ddl.auto=create
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
#sql\u8F93\u51FA
spring.jpa.show-sql=true
#format\u4E00\u4E0Bsql\u8FDB\u884C\u8F93\u51FA
spring.jpa.properties.hibernate.format_sql=true


src\test\java\com\neo\repository下创建JpaSpecificationTests、UserDetailRepositoryTests、UserRepositoryTests类

JpaSpecificationTests：

package com.neo.repository;

import com.neo.model.UserDetail;
import com.neo.param.UserDetailParam;
import com.neo.service.UserDetailService;
import com.neo.service.UserDetailServiceImpl;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.test.context.junit4.SpringRunner;

import javax.annotation.Resource;

@RunWith(SpringRunner.class)
@SpringBootTest
public class JpaSpecificationTests {

   @Resource
   private UserDetailService userDetailService;

   @Test
   public void testFindByCondition()  {
      int page=0,size=10;
      Sort sort = new Sort(Sort.Direction.DESC, "id");
      Pageable pageable = PageRequest.of(page, size, sort);
      UserDetailParam param=new UserDetailParam();
      param.setIntroduction("程序员");
      param.setMinAge(10);
      param.setMaxAge(30);
      Page<UserDetail> page1=userDetailService.findByCondition(param,pageable);
      for (UserDetail userDetail:page1){
         System.out.println("userDetail: "+userDetail.toString());
      }
   }

}

UserDetailRepositoryTests：

package com.neo.repository;

import com.neo.model.Address;
import com.neo.model.User;
import com.neo.model.UserDetail;
import com.neo.model.UserInfo;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.test.context.junit4.SpringRunner;

import javax.annotation.Resource;
import java.text.DateFormat;
import java.util.Date;
import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest
public class UserDetailRepositoryTests {

   @Resource
   private AddressRepository addressRepository;
   @Resource
   private UserDetailRepository userDetailRepository;

   @Test
   public void testSaveAddress() {
      Address address=new Address();
      address.setUserId(1L);
      address.setCity("北京");
      address.setProvince("北京");
      address.setStreet("分钟寺");
      addressRepository.save(address);
   }

   @Test
   public void testSaveUserDetail() {
      Date date = new Date();
      DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG);
      String formattedDate = dateFormat.format(date);
      UserDetail userDetail=new UserDetail();
      userDetail.setUserId(3L);
      userDetail.setHobby("吃鸡游戏");
      userDetail.setAge(28);
      userDetail.setIntroduction("一个爱玩的人");
      userDetailRepository.save(userDetail);
   }

   @Test
   public void testUserInfo()  {
      List<UserInfo> userInfos=userDetailRepository.findUserInfo("钓鱼");
      for (UserInfo userInfo:userInfos){
         System.out.println("userInfo: "+userInfo.getUserName()+"-"+userInfo.getEmail()+"-"+userInfo.getHobby()+"-"+userInfo.getIntroduction());
      }
   }
}

UserRepositoryTests：

package com.neo.repository;

import com.neo.model.User;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.test.context.junit4.SpringRunner;

import javax.annotation.Resource;
import java.text.DateFormat;
import java.util.Date;

@RunWith(SpringRunner.class)
@SpringBootTest
public class UserRepositoryTests {

   @Resource
    private UserRepository userRepository;

   @Test
   public void testSave() {
      Date date = new Date();
      DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG);
      String formattedDate = dateFormat.format(date);
      
      userRepository.save(new User("aa", "aa123456","aa@126.com", "aa",  formattedDate));
      userRepository.save(new User("bb", "bb123456","bb@126.com", "bb",  formattedDate));
      userRepository.save(new User("cc", "cc123456","cc@126.com", "cc",  formattedDate));

//    Assert.assertEquals(3, userRepository.findAll().size());
//    Assert.assertEquals("bb", userRepository.findByUserNameOrEmail("bb", "bb@126.com").getNickName());
//    userRepository.delete(userRepository.findByUserName("aa"));
   }


   @Test
   public void testBaseQuery() {
      Date date = new Date();
      DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG);
      String formattedDate = dateFormat.format(date);
      User user=new User("ff", "ff123456","ff@126.com", "ff",  formattedDate);
      userRepository.findAll();
      userRepository.findById(3L);
      userRepository.save(user);
      user.setId(2L);
      userRepository.delete(user);
      userRepository.count();
      userRepository.existsById(3L);
   }

   @Test
   public void testCustomSql() {
      userRepository.modifyById("neo",3L);
      userRepository.deleteById(3L);
      userRepository.findByEmail("ff@126.com");
   }


   @Test
   public void testPageQuery()  {
      int page=1,size=2;
      Sort sort = new Sort(Sort.Direction.DESC, "id");
      Pageable pageable = PageRequest.of(page, size, sort);
      userRepository.findALL(pageable);
      userRepository.findByNickName("aa", pageable);
   }

}

SpringBoot整合JPA

原文：https://www.cnblogs.com/studygithub5208868/p/11622804.html

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