hibernate

1、创建POJO
package com.yehui;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

import org.hibernate.search.annotations.DocumentId;
import org.hibernate.search.annotations.Field;
import org.hibernate.search.annotations.Index;
import org.hibernate.search.annotations.Indexed;
import org.hibernate.search.annotations.IndexedEmbedded;
import org.hibernate.search.annotations.Store;

/**
* Employee generated by MyEclipse Persistence Tools
*/
@Entity
@Table(name = "employee", catalog = "hise", uniqueConstraints = {})
@Indexed(index = "indexes/employee")
public class Employee implements java.io.Serializable {
    private static final long serialVersionUID = 7794235365739814541L;
    private Integer empId;
    private String empName;
    private Department dept;
    private String empNo;
    private Double empSalary;

    // Constructors

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

    /** minimal constructor */
    public Employee(Integer empId) {
        this.empId = empId;
    }

    /** full constructor */
    public Employee(Integer empId, String empName,
            String empNo, Double empSalary) {
        this.empId = empId;
        this.empName = empName;
        this.empNo = empNo;
        this.empSalary = empSalary;
    }

    // Property accessors
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "emp_id", unique = true, nullable = false, insertable = true, updatable = true)
    @DocumentId
    public Integer getEmpId() {
        return this.empId;
    }

    public void setEmpId(Integer empId) {
        this.empId = empId;
    }

    @Column(name = "emp_name", unique = false, nullable = true, insertable = true, updatable = true, length = 30)
    @Field(name="name", index=Index.TOKENIZED, store=Store.YES)
    public String getEmpName() {
        return this.empName;
    }

    public void setEmpName(String empName) {
        this.empName = empName;
    }

    @Column(name = "emp_no", unique = false, nullable = true, insertable = true, updatable = true, length = 30)
    @Field(index=Index.UN_TOKENIZED)
    public String getEmpNo() {
        return this.empNo;
    }

    public void setEmpNo(String empNo) {
        this.empNo = empNo;
    }

    @Column(name = "emp_salary", unique = false, nullable = true, insertable = true, updatable = true, precision = 7)
    public Double getEmpSalary() {
        return this.empSalary;
    }

    public void setEmpSalary(Double empSalary) {
        this.empSalary = empSalary;
    }

    @ManyToOne(cascade = CascadeType.ALL)
    @JoinColumn(name="dept_id")
    @IndexedEmbedded(prefix="dept_", depth=1)
    public Department getDept() {
        return dept;
    }

    public void setDept(Department dept) {
        this.dept = dept;
    }

}

package com.yehui;

import java.util.List;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import org.hibernate.search.annotations.ContainedIn;
import org.hibernate.search.annotations.DocumentId;
import org.hibernate.search.annotations.Field;
import org.hibernate.search.annotations.Index;
import org.hibernate.search.annotations.Indexed;
import org.hibernate.search.annotations.Store;

/**
* Department generated by MyEclipse Persistence Tools
*/
@Entity
@Table(name = "department", catalog = "hise", uniqueConstraints = {})
@Indexed(index="indexes/department")
public class Department implements java.io.Serializable {
    private static final long serialVersionUID = 7891065193118612907L;
    private Integer deptId;
    private String deptNo;
    private String deptName;
    private List<Employee> empList;

    // Constructors

    @OneToMany(mappedBy="dept")
    @ContainedIn
    public List<Employee> getEmpList() {
        return empList;
    }

    public void setEmpList(List<Employee> empList) {
        this.empList = empList;
    }

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

    /** minimal constructor */
    public Department(Integer deptId) {
        this.deptId = deptId;
    }

    /** full constructor */
    public Department(Integer deptId, String deptNo, String deptName) {
        this.deptId = deptId;
        this.deptNo = deptNo;
        this.deptName = deptName;
    }

    // Property accessors
    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    @Column(name = "dept_id", unique = true, nullable = false, insertable = true, updatable = true)
    @DocumentId
    public Integer getDeptId() {
        return this.deptId;
    }

    public void setDeptId(Integer deptId) {
        this.deptId = deptId;
    }

    @Column(name = "dept_no", unique = false, nullable = true, insertable = true, updatable = true, length = 30)
    public String getDeptNo() {
        return this.deptNo;
    }

    public void setDeptNo(String deptNo) {
        this.deptNo = deptNo;
    }

    @Column(name = "dept_name", unique = false, nullable = true, insertable = true, updatable = true, length = 30)
    @Field(name="name", index=Index.TOKENIZED,store=Store.YES)
    public String getDeptName() {
        return this.deptName;
    }

    public void setDeptName(String deptName) {
        this.deptName = deptName;
    }
}
         不了解Hibernate映射相关的Annotation的朋友可以到Hibernate的官方网站下载Hibernate Annotation Reference，有http://wiki.redsaga.com/翻译的中文文档。当然，也可以直接使用hbm.xml文件。
        Hibernate Search相关的Annotation主要有两个：
         @Indexed                标识需要进行索引的对象，
         属性        index         指定索引文件的路径
          @Field                     标注在类的get属性上，标识一个索引的Field
          属性       index         指定是否索引，与Lucene相同
                         store         指定是否索引，与Lucene相同
                         name        指定Field的name，默认为类属性的名称
                         analyzer    指定分析器

         另外@IndexedEmbedded  与  @ContainedIn 用于关联类之间的索引
          @IndexedEmbedded有两个属性，一个prefix指定关联的前缀，一个depth指定关联的深度
          如上面两个类中Department类可以通过部门名称name来索引部门，在Employee与部门关联的前缀为dept_，因此可以通过部门名称dept_name来索引一个部门里的所有员工。

2、配置文件
<?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">

<hibernate-configuration>

<session-factory>
    <property name="hibernate.dialect">
        org.hibernate.dialect.MySQLDialect
    </property>
    <property name="hibernate.connection.url">
        jdbc:mysql://localhost:3306/hise
    </property>
    <property name="hibernate.connection.username">root</property>
    <property name="hibernate.connection.password">123456</property>
    <property name="hibernate.connection.driver_class">
        com.mysql.jdbc.Driver
    </property>

    <property name="hibernate.search.default.directory_provider">
        org.hibernate.search.store.FSDirectoryProvider
    </property>
    <property name="hibernate.search.default.indexBase">e:/index</property>
   
    <mapping class="com.yehui.Employee" />
    <mapping class="com.yehui.Department" />
</session-factory>

</hibernate-configuration>
如果使用JPA，配置文件为
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
    http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">
   
    <persistence-unit name="jpaPU" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <class>com.yehui.Department</class>
        <class>com.yehui.Employee</class>
        <properties>
            <property name="hibernate.connection.driver_class"
                value="com.mysql.jdbc.Driver" />
            <property name="hibernate.connection.url"
                value="jdbc:mysql://localhost:3306/hise" />
            <property name="hibernate.connection.username" value="root" />
            <property name="hibernate.connection.password"
                value="123456" />
            <property name="hibernate.search.default.directory_provider"
                value="org.hibernate.search.store.FSDirectoryProvider"/>
            <property name="hibernate.search.default.indexBase"
                value="e:/index"/>
        </properties>
    </persistence-unit>

</persistence>
主要就是添加两个属性，hibernate.search.default.directory_provider指定Directory的代理，即把索引的文件保存在硬盘中（org.hibernate.search.store.FSDirectoryProvider）还是内存里（org.hibernate.search.store.RAMDirectoryProvider），保存在硬盘的话hibernate.search.default.indexBase属性指定索引保存的路径。

3、测试代码
package com.yehui;

import static junit.framework.Assert.assertNotNull;
import static junit.framework.Assert.assertTrue;

import java.util.List;

import org.apache.lucene.analysis.StopAnalyzer;
import org.apache.lucene.queryParser.QueryParser;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.search.FullTextSession;
import org.hibernate.search.Search;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

public class SearchResultsHibernate {
    private static SessionFactory sf = null;
    private static Session session = null;
    private static Transaction tx = null;

    @BeforeClass
    public static void setupBeforeClass() throws Exception {
        sf = new AnnotationConfiguration().configure("hibernate.cfg.xml").buildSessionFactory();

        assertNotNull(sf);
    }

    @Before
    public void setUp() throws Exception {
        session = sf.openSession();
        tx = session.beginTransaction();
        tx.begin();
    }

    @After
    public void tearDown() throws Exception {
        tx.commit();
        session.close();
    }

    public static void tearDownAfterClass() throws Exception {
        if (sf != null)
            sf.close();
    }

    @Test
    public void testAddDept() throws Exception {
        Department dept = new Department();
        dept.setDeptName("Market");
        dept.setDeptNo("6000");

        Employee emp = new Employee();
        emp.setDept(dept);
        emp.setEmpName("Kevin");
        emp.setEmpNo("KGP1213");
        emp.setEmpSalary(8000d);
       
        session.save(emp);
    }

    @Test
    public void testFindAll() throws Exception {
        Query query = session.createQuery("from Department");

        List<Department> deptList = query.list();

        assertTrue(deptList.size() > 0);
    }
   
    @Test
    public void testIndex() throws Exception {
        FullTextSession fullTextSession = Search.createFullTextSession(session);
        assertNotNull(session);

        QueryParser parser = new QueryParser("name", new StopAnalyzer());
        org.apache.lucene.search.Query luceneQuery = parser
                .parse("name:Kevin");
        Query hibQuery = fullTextSession.createFullTextQuery(luceneQuery,
                Employee.class);

        List list = hibQuery.list();
        assertTrue(list.size() > 0);
    }
   
    @Test
    public void testIndex2() throws Exception {
        FullTextSession fullTextSession = Search.createFullTextSession(session);
        assertNotNull(session);

        QueryParser parser = new QueryParser("dept_name", new StopAnalyzer());
        org.apache.lucene.search.Query luceneQuery = parser
                .parse("dept_name:Market");
        Query hibQuery = fullTextSession.createFullTextQuery(luceneQuery,
                Employee.class);

        List list = hibQuery.list();
        assertTrue(list.size() > 0);
    }
}