搭建SpringData項目

SpringDataJPA是Spring基於ORM框架，JPA規範的基礎上封裝的一套JPA應用框架。

1.首先創建一個maven環境，並導入座標

pom.xml文件的導入

 <properties>
        <spring.version>5.2.7.RELEASE</spring.version>
        <hibernate.version>5.4.10.Final</hibernate.version>
        <slf4j.version>1.6.6</slf4j.version>
        <log4j.version>1.2.12</log4j.version>
        <c3p0.version>0.9.1.2</c3p0.version>
        <mysql.version>5.1.6</mysql.version>
    </properties>

    <dependencies>
        <!-- junit單元測試 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <!-- spring beg -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.8</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- spring end -->

        <!-- hibernate beg -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>${hibernate.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>${hibernate.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>5.2.1.Final</version>
        </dependency>
        <!-- hibernate end -->

        <!-- c3p0 beg -->
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>${c3p0.version}</version>
        </dependency>
        <!-- c3p0 end -->

        <!-- log end -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <!-- log end -->


        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>1.9.0.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>

        <!-- el beg 使用spring data jpa 必須引入 -->
        <dependency>
            <groupId>javax.el</groupId>
            <artifactId>javax.el-api</artifactId>
            <version>2.2.4</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.web</groupId>
            <artifactId>javax.el</artifactId>
            <version>2.2.4</version>
        </dependency>
        <!-- el end -->
    </dependencies>

然後是在resource文件夾下創建一個applicationContext.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:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:task="http://www.springframework.org/schema/task"
       xsi:schemaLocation="
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
		http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
		http://www.springframework.org/schema/data/jpa
		http://www.springframework.org/schema/data/jpa/spring-jpa.xsd">

    <!--spring 和 spring data jpa的配置-->

    <!-- 1.創建entityManagerFactory對象交給spring容器管理-->
    <bean id="entityManagerFactoty" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!--配置的掃描的包（實體類所在的包） -->
        <property name="packagesToScan" value="com.w.domain" />
        <!-- jpa的實現廠家 -->
        <property name="persistenceProvider">
            <bean class="org.hibernate.jpa.HibernatePersistenceProvider"/>
        </property>

        <!--jpa的供應商適配器 -->
        <property name="jpaVendorAdapter">
            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
                <!--配置是否自動創建數據庫表 -->
                <property name="generateDdl" value="false" />
                <!--指定數據庫類型 -->
                <property name="database" value="MYSQL" />
                <!--數據庫方言：支持的特有語法 -->
                <property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
                <!--是否顯示sql -->
                <property name="showSql" value="true" />
            </bean>
        </property>

        <!--jpa的方言 ：高級的特性 -->
        <property name="jpaDialect" >
            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" />
        </property>

    </bean>

    <!--2.創建數據庫連接池 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="user" value="root"></property>
        <property name="password" value="123456"></property>
        <property name="jdbcUrl" value="jdbc:mysql:///springdata" ></property>
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
    </bean>

    <!--3.整合spring dataJpa-->
    <jpa:repositories base-package="com.w.dao" transaction-manager-ref="transactionManager"
                   entity-manager-factory-ref="entityManagerFactoty" ></jpa:repositories>

    <!--4.配置事務管理器 -->
    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactoty"></property>
    </bean>

    <!-- 4.txAdvice-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="save*" propagation="REQUIRED"/>
            <tx:method name="insert*" propagation="REQUIRED"/>
            <tx:method name="update*" propagation="REQUIRED"/>
            <tx:method name="delete*" propagation="REQUIRED"/>
            <tx:method name="get*" read-only="true"/>
            <tx:method name="find*" read-only="true"/>
            <tx:method name="*" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>

    <!-- 5.aop-->
    <aop:config>
        <aop:pointcut id="pointcut" expression="execution(* com.w.service.*.*(..))" />
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut" />
    </aop:config>


    <!--5.聲明式事務 -->

    <!-- 6. 配置包掃描-->
    <context:component-scan base-package="com.w" ></context:component-scan>
</beans>

然後在對應的com.w.domain下面創建實體類

package com.w.domain;

import javax.persistence.*;

@Entity
@Table(name="cst_customer")
public class Customer {
    //主鍵
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name="cust_id")
    private Long cId;
    //客戶名稱
    @Column(name="cust_name")
    private String cName;
    //客戶來源
    @Column(name="cust_source")
    private String cSource;
    //所屬行業
    @Column(name="cust_industry")
    private String cIndustry;
    //等級
    @Column(name="cust_level")
    private String cLevel;
    //地址
    @Column(name="cust_address")
    private String cAddr;
    //電話
    @Column(name="cust_phone")
    private String cPhone;

    public Long getcId() {
        return cId;
    }

    public void setcId(Long cId) {
        this.cId = cId;
    }

    public String getcName() {
        return cName;
    }

    public void setcName(String cName) {
        this.cName = cName;
    }

    public String getcSource() {
        return cSource;
    }

    public void setcSource(String cSource) {
        this.cSource = cSource;
    }

    public String getcIndustry() {
        return cIndustry;
    }

    public void setcIndustry(String cIndustry) {
        this.cIndustry = cIndustry;
    }

    public String getcLevel() {
        return cLevel;
    }

    public void setcLevel(String cLevel) {
        this.cLevel = cLevel;
    }

    public String getcAddr() {
        return cAddr;
    }

    public void setcAddr(String cAddr) {
        this.cAddr = cAddr;
    }

    public String getcPhone() {
        return cPhone;
    }

    public void setcPhone(String cPhone) {
        this.cPhone = cPhone;
    }

    @Override
    public String toString() {
        return "Customer{" +
                "cId=" + cId +
                ", cName='" + cName + '\'' +
                ", cSource='" + cSource + '\'' +
                ", cIndustry='" + cIndustry + '\'' +
                ", cLevel='" + cLevel + '\'' +
                ", cAddr='" + cAddr + '\'' +
                ", cPhone='" + cPhone + '\'' +
                '}';
    }
}

以及實體類對應的sql，在我的上一章節搭建JPA項目中有

接着就是創建對應的Dao接口，需要繼承

JpaRepository<Customer, Long>, JpaSpecificationExecutor<Customer>兩個接口

package com.w.dao;

import com.w.domain.Customer;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;

public interface CustomDao extends JpaRepository<Customer, Long>, JpaSpecificationExecutor<Customer> {

    @Query(value = "from Customer where cId = ?2 and cName = ?1",nativeQuery = false)
    Customer getCustomerByNameAndId(String name,long id);

    @Query("update Customer set cName=?2 where cId=?1")
    @Modifying
    void updateCustomerById(long id,String name);



    Customer findByCNameLikeAndCAddr(String cName, String cAddr);

    Customer findByCName(String cName);
}

接着編寫測試類

package com.w.test;

import com.w.dao.CustomDao;
import com.w.domain.Customer;
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 java.util.List;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class TestCRUD {

    @Autowired
    private CustomDao customDao;

    @Test
    public void testFindAll() {
        List<Customer> customers = customDao.findAll();
        System.out.println(customers);
    }
    @Test
    public void testFindOne() {
        Customer customer = customDao.findOne(1L);
        System.out.println(customer);
    }
    @Test
    public void testSave() {
        Customer customer =new Customer();
        customer.setcName("張三小瘋子");
        customer.setcAddr("上海");
         customDao.save(customer);
    }
    @Test
    public void testDelete() {
        customDao.delete(4L);
    }
    @Test
    public void testCount(){
        System.out.println(customDao.count());
    }
    @Test
    public void testExist(){
        //查看是否存在該對象
        System.out.println(customDao.exists(4L));
    }
}

這裏面都是一些springData裏面有的方法

如果使用JPQL語句進行查詢

則還需要添加對應的方法在dao接口中，我已經在裏面定義完了，可以照着操作

package com.w.test;

import com.w.dao.CustomDao;
import com.w.domain.Customer;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.annotation.Rollback;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.transaction.annotation.Transactional;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class TestJPQL {
    @Autowired
    private CustomDao customDao;

    @Test
    public void testFindByNameAndId(){
        System.out.println(customDao.getCustomerByNameAndId("張三",1L));
    }
    @Test
    @Transactional
    @Rollback(value = false)
    public void testUpdate(){
        customDao.updateCustomerById(2,"小趙");
    }
}

最後是根據命名規範進行查找

package com.w.test;

import com.w.dao.CustomDao;
import com.w.domain.Customer;
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;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class TestOthers {
    @Autowired
    private CustomDao customDao;

    @Test
    public void test1(){
        Customer customer = customDao.findByCNameLikeAndCAddr("%張%","上海");
        //Customer customer = customDao.findByCName("%張%");
        System.out.println(customer);
    }
}