008_Spring Data JPA原生SQL

1. nativeQuery默认的是false, 表示不开启sql查询。表示是否对value中的语句做转义。使用原生sql, 需要开启它。

2. 原生sql中使用的是表名,这要和JPQL语句中使用的是实体类名区分开来。  

3. 创建一个名为spring-data-jpa-sql的Java项目, 同时添加相关jar包, 并添加JUnit能力。 

4. 新建User.java 

package com.bjbs.pojo;import java.io.Serializable; import java.util.Date; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; import org.springframework.format.annotation.DateTimeFormat;@Entity // 指定该类是实体类 @Table(name = "user") // 指定数据库表名(表名和实体类对应) public class User implements Serializable {private static final long serialVersionUID = 1L;@Id // 指定为主键@GeneratedValue(strategy = GenerationType.IDENTITY) // 指定主键生成策略@Column(name = "id") // 指定表中列名(列名和属性名对应)private Integer id;@Column(name = "name")private String name;@Column(name = "sex")private String sex;@Column(name = "birthday")@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")private Date birthday;@Column(name = "address")private String address;public User() {}public User(String name, String sex, Date birthday, String address) {this.name = name;this.sex = sex;this.birthday = birthday;this.address = address;}public User(Integer id, String name, String sex, Date birthday, String address) {this.id = id;this.name = name;this.sex = sex;this.birthday = birthday;this.address = address;}public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}@Overridepublic String toString() {return "User [id=" + id + ", name=" + name + ", sex=" + sex + ", birthday=" + birthday + ", address=" + address+ "]";} }

5. 新建UserRepository.java, 实现Repository

package com.bjbs.dao;import java.util.Date; import java.util.List; import org.springframework.data.jpa.repository.Modifying; import org.springframework.data.jpa.repository.Query; import org.springframework.data.repository.Repository; import com.bjbs.pojo.User;/*** 参数一T: 当前需要映射的实体; 参数二 T: 当前映射的实体中的id的类型*/ public interface UserRepository extends Repository<User, Integer> {// nativeQuery: 默认的是false, 表示不开启sql查询。表示是否对value中的语句做转义。@Query(value="select * from user where name = ?", nativeQuery=true)public User queryUserByName(String name);@Query(value="select * from user where name like ?", nativeQuery=true)public List<User> queryUserByNameLike(String name);@Query(value="select * from user where name = ? and sex >= ?", nativeQuery=true)public User queryUserByNameAndSex(String name, String sex);@Query(value="update user set sex = ? where id = ?", nativeQuery=true)@Modifying //@Modifying当前语句是一个更新语句public Integer updateUserSexById(String sex, Integer id);@Query(value="insert into user(id, name, sex, birthday, address) values(null, ?, ?, ?, ?)", nativeQuery=true)@Modifying public Integer insertUser(String name, String sex, Date birthday, String address);@Query(value="delete from user where id = ?", nativeQuery=true)@Modifying public Integer deleteUserById(Integer id); }

6. 新建UserService.java

package com.bjbs.service;import java.util.Date; import java.util.List; import com.bjbs.pojo.User;public interface UserService {public User queryUserByName(String name);public List<User> queryUserByNameLike(String name);public User queryUserByNameAndSex(String name, String sex);public Integer updateUserSexById(String sex, Integer id);public Integer insertUser(String name, String sex, Date birthday, String address);public Integer deleteUserById(Integer id); }

7. 新建UserServiceImpl.java

package com.bjbs.service.impl;import java.util.Date; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import com.bjbs.dao.UserRepository; import com.bjbs.pojo.User; import com.bjbs.service.UserService;@Service @Transactional public class UserServiceImpl implements UserService {@Autowiredprivate UserRepository userRepository;@Overridepublic User queryUserByName(String name) {return userRepository.queryUserByName(name);}@Overridepublic List<User> queryUserByNameLike(String name) {return userRepository.queryUserByNameLike(name);}@Overridepublic User queryUserByNameAndSex(String name, String sex) {return userRepository.queryUserByNameAndSex(name, sex);}@Overridepublic Integer updateUserSexById(String sex, Integer id) {return userRepository.updateUserSexById(sex, id);}@Overridepublic Integer insertUser(String name, String sex, Date birthday, String address) {return userRepository.insertUser(name, sex, birthday, address);}@Overridepublic Integer deleteUserById(Integer id) {return userRepository.deleteUserById(id);} }

8. 新建TestUserRepository.java

package com.bjbs.test;import java.util.Date; import java.util.List; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import com.bjbs.pojo.User; import com.bjbs.service.UserService;@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration("classpath:applicationContext.xml") public class TestUserRepository {@Autowiredprivate UserService userService;/*** 查询名字叫'曹操'的用户*/@Testpublic void queryUserByName() {User userDb = userService.queryUserByName("曹操");System.out.println(userDb);}/*** 查询姓'李'的所有用户*/@Testpublic void queryUserByNameLike() {List<User> list = userService.queryUserByNameLike("李%");for (User user : list) {System.out.println(user);}}/*** 查询名字叫'曹操'并且性别为'男'的用户*/@Testpublic void queryUserByNameAndSex() {User userDb = userService.queryUserByNameAndSex("曹操", "男");System.out.println(userDb);}/*** 通过id更新用户性别*/@Testpublic void updateUserSexById() {int result = userService.updateUserSexById("男", 51);System.out.println("result = " + result);}/*** 通过id删除用户*/@Testpublic void deleteUserById() {int result = userService.deleteUserById(57);System.out.println("result = " + result);}/*** 添加用户*/@Testpublic void insertUser() {int result = userService.insertUser("曹铄", "男", new Date(), "安徽省亳州市");System.out.println("result = " + result);} }

9. 在src下新建application.properties

spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver spring.datasource.url=jdbc:mysql://192.168.25.138:3306/StudyMybatis?useSSL=true&useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai spring.datasource.username=root spring.datasource.password=lyw123456

10. 在src下新建applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context"xmlns:tx="http://www.springframework.org/schema/tx"xmlns:jpa="http://www.springframework.org/schema/data/jpa"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"><!-- 配置读取properties文件的工具类 --><context:property-placeholder location="classpath:application.properties" /><!-- 配置c3p0数据库连接池 --><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><property name="jdbcUrl" value="${spring.datasource.url}" /><property name="driverClass" value="${spring.datasource.driverClassName}" /><property name="user" value="${spring.datasource.username}" /><property name="password" value="${spring.datasource.password}" /></bean><!-- Spring整合JPA 配置EntityManagerFactory --><bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"><property name="dataSource" ref="dataSource" /><property name="jpaVendorAdapter"><bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"><!-- hibernate相关的属性的注入 --><!-- 配置数据库类型 --><property name="database" value="MYSQL" /><!-- 正向工程 自动创建表 --><!-- <property name="generateDdl" value="true" /> --><!-- 显示执行的SQL --><property name="showSql" value="true" /></bean></property><!-- 扫描实体的包 --><property name="packagesToScan"><list><value>com.bjbs.pojo</value></list></property></bean><!-- 配置Hibernate的事务管理器 --><bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"><property name="entityManagerFactory" ref="entityManagerFactory" /></bean><!-- 配置开启注解事务处理 --><tx:annotation-driven transaction-manager="transactionManager" /><!-- 配置springIOC的注解扫描 --><context:component-scan base-package="com.bjbs.service" /><!-- Spring Data JPA 的配置 --><!-- base-package: 扫描dao接口所在的包 --><jpa:repositories base-package="com.bjbs.dao" /> </beans>

11. 数据库user表

12. 查询名字叫'曹操'的用户 

13. 查询姓'李'的所有用户

14. 查询名字叫'曹操'并且性别为'男'的用户 

15. 通过id更新用户性别

16. 通过id删除用户 

17. 添加用户 

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