简单springData学习笔记

实体类:

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

/**
 * 雇员:  先开发实体类===>自动生成数据表
 */
@Entity
public class Employee {

    private Integer id;

    private String name;

    private Integer age;

    @GeneratedValue
    @Id
    public Integer getId() {
        return id;
    }

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

    @Column(length = 20)
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

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

repository层

package com.imooc.repository;

import com.imooc.domain.Employee;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.Repository;
import org.springframework.data.repository.RepositoryDefinition;
import org.springframework.data.repository.query.Param;

import java.util.List;


@RepositoryDefinition(domainClass = Employee.class, idClass = Integer.class)
public interface EmployeeRepository { //extends Repository<Employee,Integer>{

    public Employee findByName(String name);

    // where name like ?% and age <?
    public List<Employee> findByNameStartingWithAndAgeLessThan(String name, Integer age);

    // where name like %? and age <?
    public List<Employee> findByNameEndingWithAndAgeLessThan(String name, Integer age);

    // where name in (?,?....) or age <?
    public List<Employee> findByNameInOrAgeLessThan(List<String> names, Integer age);

    // where name in (?,?....) and age <?
    public List<Employee> findByNameInAndAgeLessThan(List<String> names, Integer age);

    //查询Employee中id最大的
    @Query("select o from Employee o where id=(select max(id) from Employee t1)")
    public Employee getEmployeeByMaxId();

    @Query("select o from Employee o where o.name=?1 and o.age=?2")
    public List<Employee> queryParams1(String name, Integer age);

    @Query("select o from Employee o where o.name=:name and o.age=:age")
    public List<Employee> queryParams2(@Param("name")String name, @Param("age")Integer age);

    @Query("select o from Employee o where o.name like %?1%")
    public List<Employee> queryLike1(String name);

    @Query("select o from Employee o where o.name like %:name%")
    public List<Employee> queryLike2(@Param("name")String name);

    //本地sql查询 将nativeQuery = true,开启nativeQuery
    @Query(nativeQuery = true, value = "select count(1) from employee")
    public long getCount();

    @Modifying
    @Query("update Employee o set o.age = :age where o.id = :id")
    public void update(@Param("id")Integer id, @Param("age")Integer age);
}

server层

package com.imooc.service;

import com.imooc.repository.EmployeeRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.transaction.Transactional;

@Service
public class EmployeeService {

    @Autowired
    private EmployeeRepository employeeRepository;

    //修改需要添加事物管理,事物一般添加在server层,这样可以对repo层的对应的方法放在一个事物里面
    @Transactional
    public void update(Integer id, Integer age) {
        employeeRepository.update(id, age);
    }

}

测试方法

repoTest

package com.imooc.repository;


import com.imooc.domain.Employee;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.ArrayList;
import java.util.List;

public class EmployeeRepositoryTest {


    private ApplicationContext ctx = null;
    private EmployeeRepository employeeRepository = null;

    @Before
    public void setup() {
        ctx = new ClassPathXmlApplicationContext("beans-new.xml");
        employeeRepository = ctx.getBean(EmployeeRepository.class);
        System.out.println("setup");
    }

    @After
    public void tearDown() {
        ctx = null;
        System.out.println("tearDown");
    }


    @Test
    public void testFindByName() {
        //org.springframework.data.jpa.repository.support.SimpleJpaRepository@1a9c0566
        System.out.println(employeeRepository);
        Employee employee = employeeRepository.findByName("zhangsan");
        System.out.println("id:" + employee.getId()
                + " , name:" + employee.getName()
                + " ,age:" + employee.getAge());
    }

    @Test
    public void testFindByNameStartingWithAndAgeLessThan() {
        List<Employee> employees = employeeRepository.findByNameStartingWithAndAgeLessThan("test", 22);

        for (Employee employee : employees) {
            System.out.println("id:" + employee.getId()
                    + " , name:" + employee.getName()
                    + " ,age:" + employee.getAge());
        }
    }

    @Test
    public void testFindByNameEndingWithAndAgeLessThan() {
        List<Employee> employees = employeeRepository.findByNameEndingWithAndAgeLessThan("6", 23);

        for (Employee employee : employees) {
            System.out.println("id:" + employee.getId()
                    + " , name:" + employee.getName()
                    + " ,age:" + employee.getAge());
        }
    }


    @Test
    public void testFindByNameInOrAgeLessThan() {
        List<String> names = new ArrayList<String>();
        names.add("test1");
        names.add("test2");
        names.add("test3");
        List<Employee> employees = employeeRepository.findByNameInOrAgeLessThan(names, 22);

        for (Employee employee : employees) {
            System.out.println("id:" + employee.getId()
                    + " , name:" + employee.getName()
                    + " ,age:" + employee.getAge());
        }
    }

    @Test
    public void testFindByNameInAndAgeLessThan() {
        List<String> names = new ArrayList<String>();
        names.add("test1");
        names.add("test2");
        names.add("test3");
        List<Employee> employees = employeeRepository.findByNameInAndAgeLessThan(names, 22);

        for (Employee employee : employees) {
            System.out.println("id:" + employee.getId()
                    + " , name:" + employee.getName()
                    + " ,age:" + employee.getAge());
        }
    }

    @Test
    public void testGetEmployeeByMaxId() {
        Employee employee = employeeRepository.getEmployeeByMaxId();
        System.out.println("id:" + employee.getId()
                + " , name:" + employee.getName()
                + " ,age:" + employee.getAge());
    }

    @Test
    public void testQueryParams1() {
        List<Employee> employees = employeeRepository.queryParams1("zhangsan", 20);
        for (Employee employee : employees) {
            System.out.println("id:" + employee.getId()
                    + " , name:" + employee.getName()
                    + " ,age:" + employee.getAge());
        }
    }

    @Test
    public void testQueryParams2() {
        List<Employee> employees = employeeRepository.queryParams2("zhangsan", 20);
        for (Employee employee : employees) {
            System.out.println("id:" + employee.getId()
                    + " , name:" + employee.getName()
                    + " ,age:" + employee.getAge());
        }
    }


    @Test
    public void testQueryLike1() {
        List<Employee> employees = employeeRepository.queryLike1("test");
        for (Employee employee : employees) {
            System.out.println("id:" + employee.getId()
                    + " , name:" + employee.getName()
                    + " ,age:" + employee.getAge());
        }
    }

    @Test
    public void testQueryLike2() {
        List<Employee> employees = employeeRepository.queryLike2("test1");
        for (Employee employee : employees) {
            System.out.println("id:" + employee.getId()
                    + " , name:" + employee.getName()
                    + " ,age:" + employee.getAge());
        }
    }

    @Test
    public void testGetCount() {
        long count = employeeRepository.getCount();
        System.out.println("count:" + count);
    }


}

serviceTest

package com.imooc.service;

import com.imooc.repository.EmployeeRepository;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class EmployeeServiceTest {

    private ApplicationContext ctx = null;
    private EmployeeService employeeService = null;

    @Before
    public void setup() {
        ctx = new ClassPathXmlApplicationContext("beans-new.xml");
        employeeService = ctx.getBean(EmployeeService.class);
        System.out.println("setup");
    }

    @After
    public void tearDown() {
        ctx = null;
        System.out.println("tearDown");
    }


    @Test
    public void testUpdate() {
        employeeService.update(1, 55);
    }

}

springdataTest

package com.imooc;

import com.imooc.dao.StudentDAO;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringDataTest {

    private ApplicationContext ctx = null;

    @Before
    public void setup(){
        ctx = new ClassPathXmlApplicationContext("beans-new.xml");
        System.out.println("setup");
    }

    @After
    public void tearDown(){
        ctx = null;
        System.out.println("tearDown");
    }

    @Test
    public void testEntityManagerFactory(){

    }

}

配置文件 beans-new.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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.xsd
		http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <!--1 配置数据源-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
        <property name="url" value="jdbc:mysql:///spring_data"/>
    </bean>

    <!--2 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"/>
        </property>
        <property name="packagesToScan" value="com.imooc"/>

        <property name="jpaProperties">
            <props>
                <prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>  <!--如果表没有根据实体自动创建-->
            </props>
        </property>

    </bean>

    <!--3 配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory"/>
    </bean>

    <!--4 配置支持注解的事务-->
    <tx:annotation-driven transaction-manager="transactionManager"/>

    <!--5 配置spring data-->
    <jpa:repositories base-package="com.imooc" entity-manager-factory-ref="entityManagerFactory"/>

    <context:component-scan base-package="com.imooc"/>

</beans>

maven配置文件pom.xml

<?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.imooc</groupId>
    <artifactId>springdata</artifactId>
    <version>1.0-SNAPSHOT</version>


    <dependencies>
        <!--MySQL Driver-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>

        <!--junit-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.10</version>
        </dependency>

        <!--spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.5.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.5.RELEASE</version>
        </dependency>

        <!--spring data jpa-->
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>1.8.0.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>4.3.6.Final</version>
        </dependency>

    </dependencies>
</project>