Hibernate入门（2）- 不用配置用注解-优快云博客

在上一个例子里面，我用的配置文件的方式，这次改成注解。

pom.xml

增加了hibernate-commons-annotations和hibernate-annotations

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.wisdombud</groupId>
    <artifactId>HibernateTest</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>HibernateTest</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <hibernate.version>4.2.0.Final</hibernate.version>
        <hibernate.search>4.2.0.Final</hibernate.search>
        <mysql-connector-java.version>5.1.29</mysql-connector-java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql-connector-java.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>${hibernate.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-c3p0</artifactId>
            <version>${hibernate.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-ehcache</artifactId>
            <version>${hibernate.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-search</artifactId>
            <version>${hibernate.search}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>${hibernate.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>${hibernate.version}</version>
        </dependency>
                <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-commons-annotations</artifactId>
            <version>3.2.0.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-annotations</artifactId>
            <version>3.2.0.ga</version>
        </dependency>
    </dependencies>
</project>

hibernate.cfg.xml配置文件

把mapping resource改成mapping class

<?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="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="connection.url">
            jdbc:mysql://localhost:3306/tz?useUnicode=true&amp;characterEncoding=utf8
        </property>
        <property name="connection.username">tz</property>
        <property name="connection.password">tz</property>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="show_sql">true</property>
        <mapping class="com.wisdombud.HibernateTest.Dept" />
    </session-factory>
</hibernate-configuration>

对象的修改

这个是重点，需要在类和属性上面增加注解。可以在属性上增加注解或者在get方法上增加注解。

package com.wisdombud.HibernateTest;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "dept")
public class Dept {

    private String id;

    private String DeptNo;

    private String DName;

    @Column(name = "id")
    @Id
    public String getId() {
        return id;
    }

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

    @Column(name = "DeptNo")
    public String getDeptNo() {
        return DeptNo;
    }

    public void setDeptNo(String deptNo) {
        DeptNo = deptNo;
    }

    @Column(name = "DName")
    public String getDName() {
        return DName;
    }

    public void setDName(String dName) {
        DName = dName;
    }
}