Hibernate 的 Criteria用法，完整的一个例子

数据库：

/*
MySQL Data Transfer
Source Host: localhost
Source Database: test
Target Host: localhost
Target Database: test
Date: 2011-10-18 16:44:27
*/

SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for table_a
-- ----------------------------
DROP TABLE IF EXISTS `table_a`;
CREATE TABLE `table_a` (
  `id` int(11) NOT NULL auto_increment,
  `name` varchar(20) default NULL,
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- ----------------------------
-- Table structure for table_b
-- ----------------------------
DROP TABLE IF EXISTS `table_b`;
CREATE TABLE `table_b` (
  `id` int(11) NOT NULL auto_increment,
  `name` varchar(20) default NULL,
  `aid` int(11) default NULL,
  PRIMARY KEY  (`id`),
  KEY `FK_aid_A_id` (`aid`),
  CONSTRAINT `FK_aid_A_id` FOREIGN KEY (`aid`) REFERENCES `table_a` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- ----------------------------
-- Table structure for table_c
-- ----------------------------
DROP TABLE IF EXISTS `table_c`;
CREATE TABLE `table_c` (
  `id` int(11) NOT NULL auto_increment,
  `name` varchar(20) default NULL,
  `bid` int(11) default NULL,
  PRIMARY KEY  (`id`),
  KEY `FK_bid_B_id` (`bid`),
  CONSTRAINT `FK_bid_B_id` FOREIGN KEY (`bid`) REFERENCES `table_b` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records 
-- ----------------------------
INSERT INTO `table_a` VALUES ('1', 'a_1');
INSERT INTO `table_a` VALUES ('2', 'a_2');
INSERT INTO `table_a` VALUES ('3', 'a_3');
INSERT INTO `table_a` VALUES ('4', 'a_4');
INSERT INTO `table_a` VALUES ('5', 'a_5');
INSERT INTO `table_a` VALUES ('6', 'a_6');
INSERT INTO `table_a` VALUES ('7', 'a_7');
INSERT INTO `table_a` VALUES ('8', 'a_8');
INSERT INTO `table_a` VALUES ('9', 'a_9');
INSERT INTO `table_a` VALUES ('10', 'a_10');
INSERT INTO `table_b` VALUES ('1', 'b_1', '1');
INSERT INTO `table_b` VALUES ('2', 'b_2', '1');
INSERT INTO `table_b` VALUES ('3', 'b_3', '1');
INSERT INTO `table_b` VALUES ('4', 'b_4', '1');
INSERT INTO `table_b` VALUES ('5', 'b_5', '1');
INSERT INTO `table_b` VALUES ('6', 'b_6', '1');
INSERT INTO `table_b` VALUES ('7', 'b_7', '1');
INSERT INTO `table_b` VALUES ('8', 'b_8', '1');
INSERT INTO `table_b` VALUES ('9', 'b_9', '1');
INSERT INTO `table_b` VALUES ('10', 'b_10', '1');
INSERT INTO `table_c` VALUES ('1', 'c_1', '1');
INSERT INTO `table_c` VALUES ('2', 'c_2', '1');
INSERT INTO `table_c` VALUES ('3', 'c_3', '1');
INSERT INTO `table_c` VALUES ('4', 'c_4', '1');
INSERT INTO `table_c` VALUES ('5', 'c_5', '1');
INSERT INTO `table_c` VALUES ('6', 'c_6', '1');
INSERT INTO `table_c` VALUES ('7', 'c_7', '1');
INSERT INTO `table_c` VALUES ('8', 'c_8', '1');
INSERT INTO `table_c` VALUES ('9', 'c_9', '1');
INSERT INTO `table_c` VALUES ('10', 'c_10', '1');

 

表映射的3个类

package com.hibernate.entity;

import java.util.HashSet;

/**
 * TableA entity. @author MyEclipse Persistence Tools
 */
@Entity
@Table(name = "table_a", catalog = "test")
public class TableA implements java.io.Serializable {

	// Fields

	/**
	 * 
	 */
	private static final long serialVersionUID = 5391348233326253804L;
	private Integer id;
	private String name;
	private Set<TableB> tableBs = new HashSet<TableB>(0);

	// Constructors

	/** default constructor */
	public TableA() {
	}

	/** full constructor */
	public TableA(String name, Set<TableB> tableBs) {
		this.name = name;
		this.tableBs = tableBs;
	}

	// Property accessors
	@Id
	@GeneratedValue
	@Column(name = "id", unique = true, nullable = false)
	public Integer getId() {
		return this.id;
	}

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

	@Column(name = "name", length = 20)
	public String getName() {
		return this.name;
	}

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

	@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "tableA")
	public Set<TableB> getTableBs() {
		return this.tableBs;
	}

	public void setTableBs(Set<TableB> tableBs) {
		this.tableBs = tableBs;
	}

}


package com.hibernate.entity;

import java.util.HashSet;

/**
 * TableB entity. @author MyEclipse Persistence Tools
 */
@Entity
@Table(name = "table_b", catalog = "test")
public class TableB implements java.io.Serializable {

	// Fields

	/**
	 * 
	 */
	private static final long serialVersionUID = -4305123492413110511L;
	private Integer id;
	private TableA tableA;
	private String name;
	private Set<TableC> tableCs = new HashSet<TableC>(0);

	// Constructors

	/** default constructor */
	public TableB() {
	}

	/** full constructor */
	public TableB(TableA tableA, String name, Set<TableC> tableCs) {
		this.tableA = tableA;
		this.name = name;
		this.tableCs = tableCs;
	}

	// Property accessors
	@Id
	@GeneratedValue
	@Column(name = "id", unique = true, nullable = false)
	public Integer getId() {
		return this.id;
	}

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

	@ManyToOne(fetch = FetchType.LAZY)
	@JoinColumn(name = "aid")
	public TableA getTableA() {
		return this.tableA;
	}

	public void setTableA(TableA tableA) {
		this.tableA = tableA;
	}

	@Column(name = "name", length = 20)
	public String getName() {
		return this.name;
	}

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

	@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "tableB")
	public Set<TableC> getTableCs() {
		return this.tableCs;
	}

	public void setTableCs(Set<TableC> tableCs) {
		this.tableCs = tableCs;
	}

}

package com.hibernate.entity;

import javax.persistence.Column;

/**
 * TableC entity. @author MyEclipse Persistence Tools
 */
@Entity
@Table(name = "table_c", catalog = "test")
public class TableC implements java.io.Serializable {

	// Fields

	/**
	 * 
	 */
	private static final long serialVersionUID = -8806809289431187808L;
	private Integer id;
	private TableB tableB;
	private String name;

	// Constructors

	/** default constructor */
	public TableC() {
	}

	/** full constructor */
	public TableC(TableB tableB, String name) {
		this.tableB = tableB;
		this.name = name;
	}

	// Property accessors
	@Id
	@GeneratedValue
	@Column(name = "id", unique = true, nullable = false)
	public Integer getId() {
		return this.id;
	}

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

	@ManyToOne(fetch = FetchType.LAZY)
	@JoinColumn(name = "bid")
	public TableB getTableB() {
		return this.tableB;
	}

	public void setTableB(TableB tableB) {
		this.tableB = tableB;
	}

	@Column(name = "name", length = 20)
	public String getName() {
		return this.name;
	}

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

}

 

Hibernate.cfg.xml

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

	<session-factory>
		<property name="dialect">
			org.hibernate.dialect.MySQLDialect
		</property>
		<property name="connection.url">
			jdbc:mysql://localhost/test
		</property>
		<property name="connection.username">root</property>
		<property name="connection.password">root</property>
		<property name="connection.driver_class">
			com.mysql.jdbc.Driver
		</property>

		<!-- JDBC connection pool (use the built-in) -->
		<property name="connection.pool_size">1</property>



		<!-- Enable Hibernate's automatic session context management -->
		<property name="current_session_context_class">thread</property>

		<!-- Disable the second-level cache  -->
		<property name="cache.provider_class">
			org.hibernate.cache.NoCacheProvider
		</property>

		<!-- Echo all executed SQL to stdout -->
		<property name="show_sql">true</property>

		<property name="format_sql">true</property>
		<!--
			<mapping class="com.hibernate.entity.Husband" />
			<mapping class="com.hibernate.entity.Wife" />
			===================================================
			<mapping class="com.hibernate.entity.Teacher" />
			<mapping class="com.hibernate.entity.Student" />
                        <mapping class="com.hibernate.entity.Tgroup" />
		        <mapping class="com.hibernate.entity.Tuser" />
		-->

		
		<mapping class="com.hibernate.entity.TableC" />
		<mapping class="com.hibernate.entity.TableB" />
		<mapping class="com.hibernate.entity.TableA" />
	</session-factory>

</hibernate-configuration>

 

log4j.properties

### set log levels ###
log4j.rootLogger=warn, stdout, D, E


### 输出到控制台 ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = %d{ABSOLUTE} %5p %c:%L - %m%n


### 输出到日志文件 ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = ${WORKDIR}/logs/log.log
log4j.appender.D.Append = true
## 输出DEBUG级别以上的日志
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [%t:%r] - %c:%L - [%p] %m%n


### 保存异常信息到单独文件 ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
## 异常日志文件名
log4j.appender.E.File = ${WORKDIR}/logs/error.log
log4j.appender.E.Append = true
## 只输出ERROR级别以上的日志!!!
log4j.appender.E.Threshold = ERROR 
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern =%-d{yyyy-MM-dd HH\:mm\:ss} [%t\:%r] - %c\:%L - [%p] %m%n

 

测试代码：

 

package com.hibernate.test;


import java.util.HashMap;

public class ORMappingTest {
	
	private static SessionFactory sessionFactory;

	@BeforeClass
	public static void setUpBeforeClass() throws Exception {
		//new SchemaExport(new AnnotationConfiguration().configure()).create(true, true);
		sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
	}

	@AfterClass
	public static void tearDownAfterClass() throws Exception {
		sessionFactory.close();
	}
	
        //根据annotation生成表，当然，这里并不使用到
	@Test
	public void testSchemaExport() {
		new SchemaExport(new AnnotationConfiguration().configure()).create(true, true);
	}
	
	//把值存入A B C三张表
	@Test
	public void saveABC() {
		Session s = sessionFactory.getCurrentSession();
		s.beginTransaction();
		TableA a = null;
		for (int i = 0; i < 10; i++) {
			a = new TableA();
			a.setName("a_" + (i + 1));
			s.save(a);
		}
		a = (TableA)s.get(TableA.class, 1);
		TableB b = null;
		for (int i = 0; i < 10; i++) {
			b = new TableB();
			b.setName("b_" + (i + 1));
			b.setTableA(a);
			s.save(b);
		}
		TableC c = null;
		b = (TableB)s.get(TableB.class, 1);
		for (int i = 0; i < 10; i++) {
			c = new TableC();
			c.setName("c_" + (i + 1));
			c.setTableB(b);
			s.save(c);
		}
		s.getTransaction().commit();
	}
	
	@Test
	public void testQBC() {
		Session s = sessionFactory.getCurrentSession();
		s.beginTransaction();
		Integer []id_s = {1,2,3,4}; 
		Criteria c = s.createCriteria(TableA.class)// 这里相当于 from TableA
		.add(Restrictions.in("id", id_s)) //这里取id在1,2,3,4中的TableA
		.createCriteria("tableBs") //表示把tableBs加进去再作为一个查询条件,tableBs是A对象中的一个属性
		.add(Restrictions.between("id", 5, 8))
		; 
		List<TableA> taList = c.list();
		for (TableA a : taList) {
			System.out.println(a.getName());
		}
	}

}