吴裕雄--天生自然轻量级JAVA EE企业应用开发Struts2Sping4Hibernate整合开发学习笔记：Hibernate_named_sql

<?xml version="1.0" encoding="GBK"?>
<project name="hibernate" basedir="." default="">
    <property name="src" value="src"/>
    <property name="dest" value="classes"/>

    <path id="classpath">
        <fileset dir="../../lib">
            <include name="**/*.jar"/>
        </fileset>
        <pathelement path="${dest}"/>
    </path>

    <target name="compile" description="Compile all source code">
        <delete dir="${dest}"/>
        <mkdir dir="${dest}"/>
        <copy todir="${dest}">
            <fileset dir="${src}">
                <exclude name="**/*.java"/>
            </fileset>        
        </copy>
        <javac destdir="${dest}" debug="true" includeantruntime="yes"
            deprecation="false" optimize="false" failonerror="true">
            <src path="${src}"/>
            <classpath refid="classpath"/>
            <compilerarg value="-Xlint:deprecation"/>
        </javac>
    </target>

    <target name="run" description="Run the main class" depends="compile">
        <java classname="lee.NamedSQLTest" fork="yes" failonerror="true">
            <classpath refid="classpath"/>
        </java>
    </target>

</project>

drop database if exists hibernate;

create database hibernate;

use hibernate;

CREATE TABLE course_inf (
  course_code varchar(255) NOT NULL,
  name varchar(255) default NULL,
  PRIMARY KEY  (course_code)
);

INSERT INTO course_inf VALUES 
('001','疯狂Java讲义'),
('002','轻量级Java EE企业应用实战'),
('003','疯狂Android讲义');

CREATE TABLE student_inf (
  student_id int NOT NULL,
  name varchar(255) NOT NULL,
  PRIMARY KEY  (student_id)
);

INSERT INTO student_inf VALUES
(20050231,'孙悟空'),
(20050232,'猪八戒'),
(20050233,'牛魔王');



CREATE TABLE enrolment_inf (
  enrolment_id int(11) NOT NULL auto_increment,
  semester int(11) NOT NULL,
  year int(11) NOT NULL,
  student_id int default NULL,
  course_code varchar(255) default NULL,
  PRIMARY KEY  (enrolment_id),
  KEY FKEB4882C47EDE09EE (course_code),
  KEY FKEB4882C4109881D8 (student_id),
  FOREIGN KEY (student_id) REFERENCES student_inf (student_id),
  FOREIGN KEY (course_code) REFERENCES course_inf (course_code)
);

INSERT INTO enrolment_inf VALUES
(1,3,2005,20050232,'001'),
(2,2,2005,20050232,'003'),
(3,2,2005,20050233,'002'),
(4,3,2005,20050233,'003'),
(5,1,2005,20050231,'002');


-- 创建一个简单的存储过程
create procedure select_all_student()
select *
from student_inf;

<?xml version="1.0" encoding="GBK"?>
<!-- 指定Hibernate配置文件的DTD信息 -->
<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<!-- hibernate-configuration是配置文件的根元素 -->
<hibernate-configuration>
    <session-factory>
        <!-- 指定连接数据库所用的驱动 -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <!-- 指定连接数据库的url，其中hibernate是本应用连接的数据库名 -->
        <property name="connection.url">jdbc:mysql://localhost/hibernate</property>
        <!-- 指定连接数据库的用户名 -->
        <property name="connection.username">root</property>
        <!-- 指定连接数据库的密码 -->
        <property name="connection.password">32147</property>
        <!-- 指定连接池里最大连接数 -->
        <property name="hibernate.c3p0.max_size">20</property>
        <!-- 指定连接池里最小连接数 -->
        <property name="hibernate.c3p0.min_size">1</property>
        <!-- 指定连接池里连接的超时时长 -->
        <property name="hibernate.c3p0.timeout">5000</property>
        <!-- 指定连接池里最大缓存多少个Statement对象 -->
        <property name="hibernate.c3p0.max_statements">100</property>
        <property name="hibernate.c3p0.idle_test_period">3000</property>
        <property name="hibernate.c3p0.acquire_increment">2</property>
        <property name="hibernate.c3p0.validate">true</property>
        <!-- 指定数据库方言 -->
        <property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
        <!-- 根据需要自动创建数据库 -->
        <property name="hbm2ddl.auto">update</property>
        <!-- 显示Hibernate持久化操作所生成的SQL -->
        <property name="show_sql">true</property>
        <!-- 将SQL脚本进行格式化后再输出 -->
        <property name="hibernate.format_sql">true</property>
        <!-- 罗列所有持久化类的类名 -->
        <mapping class="org.crazyit.app.domain.Enrolment"/>
        <mapping class="org.crazyit.app.domain.Student"/>
        <mapping class="org.crazyit.app.domain.Course"/>
    </session-factory>
</hibernate-configuration>

package org.crazyit.app.domain;

import javax.persistence.*;
/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
@Entity
@Table(name="course_inf")
public class Course
{
    // 代表课程编号的成员变量，将作为标识属性
    @Id @Column(name="course_code")
    private String courseCode;
    // 代表课程名成员变量
    private String name;

    // 无参数的构造器
    public Course()
    {
    }
    // 初始化全部成员变量的构造器
    public Course(String courseCode , String name)
    {
        this.courseCode = courseCode;
        this.name = name;
    }

    // courseCode的setter和getter方法
    public void setCourseCode(String courseCode)
    {
        this.courseCode = courseCode;
    }
    public String getCourseCode()
    {
        return this.courseCode;
    }

    // name的setter和getter方法
    public void setName(String name)
    {
        this.name = name;
    }
    public String getName()
    {
        return this.name;
    }

}

package org.crazyit.app.domain;

import javax.persistence.*;
/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
@Entity
@Table(name="enrolment_inf")
public class Enrolment

{
	// 定义标识属性
	@Id @Column(name="enrolment_id")
	@GeneratedValue(strategy=GenerationType.IDENTITY)
	private Integer enrolmentId;
	// 定义选课记录所属的学年
	private int year;
	
// 定义选课记录所属的学期
	private int semester;
	// 定义选课记录关联的学生实体
	@ManyToOne(targetEntity=Student.class)
	@JoinColumn(name="student_id")
	private Student student;
	// 定义选课记录关联的课程实体
	@ManyToOne(targetEntity=Course.class)
	@JoinColumn(name="course_code")
	private Course course;

	// enrolmentId的setter和getter方法
	public void setEnrolmentId(Integer enrolmentId)
	{
		this.enrolmentId = enrolmentId;
	}
	public Integer getEnrolmentId()
	{
		return this.enrolmentId;
	}

	// year的setter和getter方法
	public void setYear(int year)
	{
		this.year = year;
	}
	public int getYear()
	{
		return this.year;
	}

	// semester的setter和getter方法
	public void setSemester(int semester)
	{
		this.semester = semester;
	}
	public int getSemester()
	{
		return this.semester;
	}

	// student的setter和getter方法
	public void setStudent(Student student)
	{
		this.student = student;
	}
	public Student getStudent()
	{
		return this.student;
	}

	// course的setter和getter方法
	public void setCourse(Course course)
	{
		this.course = course;
	}
	public Course getCourse()
	{
		return this.course;
	}
}

　　

package org.crazyit.app.domain;

import java.util.*;
import javax.persistence.*;
/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
// 定义命名SQL查询
@NamedNativeQueries({
// 定义一个命名SQL查询，其名称为simpleQuery
@NamedNativeQuery(name="simpleQuery"
    // 指定命名SQL查询对应的SQL语句
    , query="select s.student_id , s.name from student_inf s"
    // 指定将查询结果转换为Student实体
    , resultClass=Student.class),
// 定义一个命名SQL查询，其名称为queryTest
@NamedNativeQuery(name="queryTest"
    // 定义SQL语句
    , query="select s.*,e.*,c.* from student_inf s,enrolment_inf e,"
    + " course_inf c where s.student_id = e.student_id and"
    + " e.course_code = c.course_code and e.year=:targetYear"
    // 指定使用名为firstMapping的@SqlResultSetMapping完成结果映射
    , resultSetMapping = "firstMapping"),
// 定义一个调用存储过程的命名SQL查询
@NamedNativeQuery(name="callProcedure"
    , query="{call select_all_student()}"
    , resultSetMapping = "secondMapping")
})
@SqlResultSetMappings({
@SqlResultSetMapping(name="firstMapping"
    , entities={@EntityResult(entityClass=Student.class),
        @EntityResult(entityClass=Enrolment.class),
        @EntityResult(entityClass=Course.class , fields=
        {
            @FieldResult(name="courseCode" , column="c.course_code"),
            @FieldResult(name="name" , column="c.name")
        })
    }
    , columns={@ColumnResult(name="s.name" , type=String.class)}
),
@SqlResultSetMapping(name="secondMapping"
    , entities={@EntityResult(entityClass=Student.class , fields=
        {
            @FieldResult(name="studentNumber" , column="student_id"),
            @FieldResult(name="name" , column="name")
        })
    })
})
@Entity
@Table(name="student_inf")
public class Student
{
    // 代表学生学号的成员变量，将作为标识属性
    @Id @Column(name="student_id")
    private Integer studentNumber;
    // 代表学生姓名的成员变量
    private String name;
    // 该学生的所有选课记录对应的关联实体
    @OneToMany(targetEntity=Enrolment.class
        , mappedBy="student" , cascade=CascadeType.REMOVE)
    private Set<Enrolment> enrolments
        = new HashSet<>();

    // 无参数的构造器
    public Student()
    {
    }
    // 初始化全部成员变量的构造器
    public Student(Integer studentNumber , String name)
    {
        this.studentNumber = studentNumber;
        this.name = name;
    }

    // studentNumber的setter和getter方法
    public void setStudentNumber(Integer studentNumber)
    {
        this.studentNumber = studentNumber;
    }
    public Integer getStudentNumber()
    {
        return this.studentNumber;
    }

    // name的setter和getter方法
    public void setName(String name)
    {
        this.name = name;
    }
    public String getName()
    {
        return this.name;
    }

    // enrolments的setter和getter方法
    public void setEnrolments(Set<Enrolment> enrolments)
    {
        this.enrolments = enrolments;
    }
    public Set<Enrolment> getEnrolments()
    {
        return this.enrolments;
    }
}

package org.crazyit.app.vo;

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public class StudentCourse
{
    private String stuName;
    private String courseName;

    // stuName的setter和getter方法
    public void setStuName(String stuName)
    {
        this.stuName = stuName;
    }
    public String getStuName()
    {
        return this.stuName;
    }

    // courseName的setter和getter方法
    public void setCourseName(String courseName)
    {
        this.courseName = courseName;
    }
    public String getCourseName()
    {
        return this.courseName;
    }
}

package lee;

import org.hibernate.*;
import org.hibernate.transform.*;

import java.util.*;

import org.crazyit.app.domain.*;

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public class NamedSQLTest
{
    public static void main(String[] args)
    {
        NamedSQLTest test = new NamedSQLTest();
//        test.simpleQuery();
        test.query();
//        test.callProcedure();
        HibernateUtil.sessionFactory.close();
    }

    // 执行简单的命名SQL查询
    private void simpleQuery()
    {
        // 打开Session和事务
        Session session = HibernateUtil.currentSession();
        Transaction tx = session.beginTransaction();
        // 调用命名查询，直接返回结果
        List list = session.getNamedQuery("simpleQuery")
            .list();
        tx.commit();
        HibernateUtil.closeSession();
        // 遍历结果集
        for(Object ele : list)
        {
            // 每个集合元素是Student对象
            Student s = (Student)ele;
            System.out.println(s.getName() + "	");
        }
    }

    // 执行命名SQL查询
    private void query()
    {
        // 打开Session和事务
        Session session = HibernateUtil.currentSession();
        Transaction tx = session.beginTransaction();
        // 调用命名查询，直接返回结果
        List list = session.getNamedQuery("queryTest")
            .setInteger("targetYear" , 2005)
            .list();
        tx.commit();
        HibernateUtil.closeSession();
        // 遍历结果集
        for(Object ele : list)
        {
            // 每个集合元素是Student、Enrolment
            // 和stuName三个元素的数组
            Object[] objs = (Object[])ele;
            Student s = (Student)objs[0];
            Enrolment e = (Enrolment)objs[1];
            Course c = (Course)objs[2];
            String stuName = (String)objs[3];
            System.out.println(s.getName() + "	"
                + e.getYear() + "	" + e.getSemester()
                + "	=" + e.getCourse().getName() + "=	" + stuName);
        }
    }

    // 调用存储过程
    private void callProcedure()
    {
        // 打开Session和事务
        Session session = HibernateUtil.currentSession();
        Transaction tx = session.beginTransaction();
        // 调用命名查询，直接返回结果
        List list = session.getNamedQuery("callProcedure")
            .list();
        tx.commit();
        HibernateUtil.closeSession();
        // 遍历结果集
        for(Object ele : list)
        {
            // 每个集合元素是Student对象
            Student s = (Student)ele;
            System.out.println(s.getName());
        }
    }
}

package lee;

import org.hibernate.*;
import org.hibernate.cfg.*;
import org.hibernate.service.*;
import org.hibernate.boot.registry.*;
/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */
public class HibernateUtil
{
    public static final SessionFactory sessionFactory;

    static
    {
        try
        {
            // 使用默认的hibernate.cfg.xml配置文件创建Configuration实例
            Configuration cfg = new Configuration()
                .configure();
            // 以Configuration实例来创建SessionFactory实例
            ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
                .applySettings(cfg.getProperties()).build();
            sessionFactory = cfg.buildSessionFactory(serviceRegistry);
        }
        catch (Throwable ex)
        {
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    // ThreadLocal可以隔离多个线程的数据共享，因此不再需要对线程同步
    public static final ThreadLocal<Session> session
        = new ThreadLocal<Session>();

    public static Session currentSession()
        throws HibernateException
    {
        Session s = session.get();
        // 如果该线程还没有Session,则创建一个新的Session
        if (s == null)
        {
            s = sessionFactory.openSession();
            // 将获得的Session变量存储在ThreadLocal变量session里
            session.set(s);
        }
        return s;
    }

    public static void closeSession()
        throws HibernateException
    {
        Session s = session.get();
        if (s != null)
            s.close();
        session.set(null);
    }
}