package com.ytkj.entity; import javax.persistence.*; import java.io.Serializable; /** * @Entity * 作用:指定当前类是实体类。 * @Table * 作用:指定实体类和表之间的对应关系。 * 属性: * name:指定数据库表的名称 * @Id * 作用:指定当前字段是主键。 * @GeneratedValue * 作用:指定主键的生成方式。。 * 属性: * strategy :指定主键生成策略。 * @Column * 作用:指定实体类属性和数据库表之间的对应关系 * 属性: * name:指定数据库表的列名称。 * unique:是否唯一 * nullable:是否可以为空 * inserttable:是否可以插入 * updateable:是否可以更新 * columnDefinition: 定义建表时创建此列的DDL * secondaryTable: 从表名。如果此列不建在主表上(默认建在主表),该属性定义该列所在从表的名字搭建开发环境[重点] * * 客户实体类 * 配置映射关系 * 实体类和表映射 * 实体类属性和表字段映射 */ @Entity @Table(name = "cst_customer") public class Customer implements Serializable { /** * 声明主键配置 */ @Id /** * 配置主键的生成策略 */ @GeneratedValue(strategy = GenerationType.IDENTITY) /** * 指定实体类属性和数据库表之间的对应关系 */ @Column(name ="cust_id") private Long custId;//客户主键 @Column(name = "cust_name") private String custName;//客户名称 @Column(name ="cust_source" ) private String custSource;//客户来源 @Column(name = "cust_industry") private String custIndustry;//客户行业 @Column(name ="cust_level") private String custLevel;//客户级别 @Column(name ="cust_address") private String custAddress;//客户地址 @Column(name = "cust_phone") private String custPhone;//客户电话 public Long getCustId() { return custId; } public void setCustId(Long custId) { this.custId = custId; } public String getCustName() { return custName; } public void setCustName(String custName) { this.custName = custName; } public String getCustSource() { return custSource; } public void setCustSource(String custSource) { this.custSource = custSource; } public String getCustIndustry() { return custIndustry; } public void setCustIndustry(String custIndustry) { this.custIndustry = custIndustry; } public String getCustLevel() { return custLevel; } public void setCustLevel(String custLevel) { this.custLevel = custLevel; } public String getCustAddress() { return custAddress; } public void setCustAddress(String custAddress) { this.custAddress = custAddress; } public String getCustPhone() { return custPhone; } public void setCustPhone(String custPhone) { this.custPhone = custPhone; } @Override public String toString() { return "Customer{" + "custId=" + custId + ", custName='" + custName + '\'' + ", custSource='" + custSource + '\'' + ", custIndustry='" + custIndustry + '\'' + ", custLevel='" + custLevel + '\'' + ", custAddress='" + custAddress + '\'' + ", custPhone='" + custPhone + '\'' + '}'; } }
package com.ytkj.dao; import com.ytkj.entity.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; import java.util.List; /** * JpaRepository<实体类类型,主键类型>:用来完成基本CRUD操作 * JpaSpecificationExecutor<实体类类型>:用于复杂查询(分页等查询操作) */ public interface CustomerDao2 extends JpaRepository<Customer,Long>, JpaSpecificationExecutor<Customer> { /** * 使用sql查询 * nativeQuery = true:使用sql查询 * nativeQuery = false:使用jpql查询,默认就是false */ @Query(value = "select * from cst_customer",nativeQuery = true) List<Customer> findAll(); /** * 使用sql条件查询 * 占位符 * 方法参数顺序尽量和占位符位置一样 * nativeQuery = true:使用sql查询 * nativeQuery = false:使用jpql查询,默认就是false */ @Query(value = "select * from cst_customer where cust_name=? ",nativeQuery = true) Customer findByName(String name); }
import com.ytkj.dao.CustomerDao2; import com.ytkj.entity.Customer; import jdk.nashorn.internal.parser.Lexer; 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)//声明spring提供的单元测试环境 @ContextConfiguration(locations = "classpath:applicationContext.xml")//指定spring容器的配置信息 public class SpringdatajpaSqlTest { @Autowired CustomerDao2 customerDao2; @Test public void findAll(){ List<Customer> list = customerDao2.findAll(); for (int i=0;i<list.size();i++){ Customer customer = list.get(i); System.out.println(customer); } } @Test public void findByName(){ Customer customer = customerDao2.findByName("中国人"); System.out.println(customer); } }