新增 spring-boot-data-jpa 用例
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luoxiang
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@ -19,7 +19,7 @@ import java.util.Date;
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@AllArgsConstructor
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@NoArgsConstructor
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@Entity // 表示该类是一个数据库表映射实体
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@Table(name = "programmer") // 指明对应的数据库表的名称 不指定的默认就是类名
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@Table(name = "programmer") // 指明对应的数据库表的名称 不指定的默认就是类名
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public class Programmer {
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/* AUTO: 默认值,主键由程序控制
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@ -41,6 +41,7 @@ public class Programmer {
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private Date birthday;
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public Programmer(String name, int age, float salary, Date birthday) {
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this.name = name;
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this.age = age;
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@ -12,27 +12,27 @@ import java.util.List;
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/**
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* @author : heibaiying
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* @description : 查询接口 继承自CrudRepository CrudRepository 默认实现了部分增删改查方法
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* @description : 查询接口继承自CrudRepository,CrudRepository 默认定义了部分增删改查方法
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*/
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public interface ProgRepository extends CrudRepository<Programmer, Integer> {
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/*
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*方法名遵循命名规范的查询 更多命名规范可以参考官方文档所列出的这张表格
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* 方法名遵循命名规范的查询 更多命名规范可以参考官方文档所列出的这张表格
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* https://docs.spring.io/spring-data/jpa/docs/2.1.3.RELEASE/reference/html/#jpa.query-methods.query-creation
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*/
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List<Programmer> findAllByName(String name);
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/*
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*分页查询
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*分页排序查询
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*/
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List<Programmer> findByAndSort(String name, Sort sort);
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Page<Programmer> findAll(Pageable pageable);
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/*
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* 占位符查询
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*/
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@Query(value = "select u from Programmer u where u.name = ?1 or u.salary = ?2")
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List<Programmer> findByCondition(String name, float salary);
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List<Programmer> findByConditionAndOrder(String name, float salary, Sort.Order order);
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/*
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@ -40,5 +40,5 @@ public interface ProgRepository extends CrudRepository<Programmer, Integer> {
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*/
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@Query("select u from Programmer u where u.name = :name or u.age = :age")
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Programmer findByParam(@Param("name") String name,
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@Param("age") int age);
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@Param("age") int age);
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}
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@ -5,10 +5,8 @@ spring:
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password: root
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driver-class-name: com.mysql.cj.jdbc.Driver
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jpa:
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hibernate:
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# 表与实体不一样时候,会相应的更新数据库中的表结构，但是存在表中原先的值不会删除
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ddl-auto: update
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# Hibernate默认创建的表是myisam引擎，可以用以下方式指定为默认使用innodb创建表
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database-platform: org.hibernate.dialect.MySQL57Dialect
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show-sql: true
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hibernate:
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ddl-auto: update
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#Hibernate默认创建的表是myisam引擎，可以用以下方式指定为使用innodb创建表
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database-platform: org.hibernate.dialect.MySQL57Dialect
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show-sql: true
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@ -0,0 +1,95 @@
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package com.heibaiying.springboot;
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import com.heibaiying.springboot.bean.Programmer;
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import com.heibaiying.springboot.dao.ProgRepository;
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import org.junit.Assert;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.data.domain.Page;
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import org.springframework.data.domain.PageRequest;
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import org.springframework.data.domain.Sort;
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import org.springframework.test.context.junit4.SpringRunner;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.List;
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import java.util.Optional;
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@RunWith(SpringRunner.class)
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@SpringBootTest
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public class DataJPATests {
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@Autowired
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private ProgRepository repository;
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/**
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* 保存数据测试
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*/
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@Test
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public void save() {
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// 保存单条数据
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repository.save(new Programmer("pro01", 12, 2121.34f, new Date()));
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// 保存多条数据
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List<Programmer> programmers = new ArrayList<>();
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programmers.add(new Programmer("pro02", 22, 3221.34f, new Date()));
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programmers.add(new Programmer("pro03", 32, 3321.34f, new Date()));
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programmers.add(new Programmer("pro04", 44, 4561.34f, new Date()));
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programmers.add(new Programmer("pro01", 44, 4561.34f, new Date()));
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repository.saveAll(programmers);
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}
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/**
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* 查询数据测试
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*/
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@Test
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public void get() {
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// 遵循命名规范的查询
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List<Programmer> programmers = repository.findAllByName("pro01");
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programmers.forEach(System.out::println);
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// 传入参数名称
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Programmer param = repository.findByParam("pro02", 22);
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System.out.println("findByParam:" + param);
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// 占位符查询
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List<Programmer> byCondition = repository.findByConditionAndOrder("pro03", 3321.34f, Sort.Order.asc("salary"));
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System.out.println("byCondition:" + byCondition);
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//条件与分页查询 需要注意的是这里的页数是从第0页开始计算的
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Page<Programmer> page = repository.findAll(PageRequest.of(0, 10, Sort.Direction.DESC, "salary"));
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page.get().forEach(System.out::println);
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}
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/**
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* 更新数据测试
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*/
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@Test
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public void update() {
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// 保存主键相同的数据就认为是更新操作
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repository.save(new Programmer(1, "updatePro01", 12, 2121.34f, new Date()));
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Optional<Programmer> programmer = repository.findById(1);
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Assert.assertEquals(programmer.get().getName(), "updatePro01");
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}
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/**
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* 删除数据测试
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*/
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@Test
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public void delete() {
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Optional<Programmer> programmer = repository.findById(2);
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if (programmer.isPresent()) {
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repository.deleteById(2);
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}
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Assert.assertFalse(programmer.isPresent());
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}
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}
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@ -1,57 +0,0 @@
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package com.heibaiying.springboot;
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import com.heibaiying.springboot.bean.Programmer;
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import com.heibaiying.springboot.dao.ProgRepository;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.data.domain.Page;
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import org.springframework.data.domain.PageRequest;
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import org.springframework.data.domain.Sort;
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import org.springframework.data.jpa.domain.JpaSort;
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import org.springframework.test.context.junit4.SpringRunner;
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import java.util.Date;
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import java.util.List;
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import java.util.Optional;
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import java.util.stream.Stream;
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@RunWith(SpringRunner.class)
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@SpringBootTest
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public class SpringBootDataJpaApplicationTests {
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@Autowired
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private ProgRepository repository;
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@Test
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public void save() {
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repository.save(new Programmer("xiaoxiao", 12, 2121.34f, new Date()));
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}
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@Test
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public void get() {
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// 遵循命名规范的查询
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List<Programmer> programmers = repository.findAllByName("xiaominng");
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programmers.forEach(System.out::println);
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// 传入参数名称
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Programmer param = repository.findByParam("xiaolan", 21);
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System.out.println("findByParam:" + param);
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// 占位符查询
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List<Programmer> byCondition = repository.findByCondition("xiaolan", 347.34f);
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System.out.println("byCondition:" + byCondition);
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//条件与分页查询
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List<Programmer> programmerList = repository.findByAndSort("xiaominng", Sort.by("salary"));
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programmerList.forEach(System.out::println);
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}
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@Test
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public void delete() {
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Optional<Programmer> programmer = repository.findById(4);
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if (programmer.isPresent()) {
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repository.deleteById(4);
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}
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}
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}
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