IntelliJ IDEA下自动生成Hibernate映射文件以及实体类
1、构建项目并添加项目结构配置以及配置初始参数
1.1、如图将基本的架子搭建好
1.2、点击File,弹出的菜单中点击Project Structure;
1.3、点击左侧的Modules,再点击“+”号,再在弹出的菜单中选择Hibernate;
1.4、在这时,项目中多出了一个Hibernate,点击Hibernate,再点击“+”号,选择hibernate.hbm.xml;
1.5、弹出的窗口中选择Hibernate的版本,然后点击OK;
1.6、点击OK后在原来1.4步骤的窗口中的Apply按妞应用到项目;
1.7、这时项目架子中多出了一个名为hibernate.hbm.xml的配置文件;
1.8、在hibernate.hbm.xml中配置如下配置;
<?xml version='1.0' encoding='utf-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!--数据库连接url配置--> <property name="connection.url">jdbc:mysql://localhost:3306/SSHBlog?useUnicode=true&characterEncoding=utf8&useSSL=true&zeroDateTimeBehavior=convertToNull</property> <!--数据库驱动配置--> <property name="connection.driver_class">com.mysql.jdbc.Driver</property> <!--数据库用户名配置--> <property name="connection.username">root</property> <!--数据库密码配置--> <property name="connection.password"></property> <!-- DB schema will be updated if needed --> <!-- <property name="hbm2ddl.auto">update</property> --> </session-factory> </hibernate-configuration>
1.9、第一步配置完毕。
2、配置数据库
2.1、点击左下角按钮,使窗口样式如图所示;
2.2、选择数据库;
2.4、配置数据库后测试连接是否成功,若成功后点击确定;
2.5、数据库如下;
3、生成Hibernate的实体类以及配置文件
3.1、点击窗口中的Persistence;
3.2、在Persistence中右键项目,然后点击Generate Persistence Mapping,选择By Database Schema;
3.3、选择数据源,配置实体类包,选择要生成的实体类(其中日期类型的只能手动修改为java.util.Date),然后点击OK;
3.4、等待一段时间之后,发现项目中的实体类以及配置文件已经自动生成。
3.5、生成的实体类以及配置文件如下所示;实体类:Contacts.java
package com.sshblog.entity; import com.fasterxml.jackson.annotation.JsonIgnoreProperties; import javax.persistence.*; import java.util.Date; @Entity @Table(name = "contacts") @JsonIgnoreProperties(value = {"hibernateLazyInitializer","handler","operations","roles","menus"}) public class Contacts { private int id; private String name; private String address; private String gender; private Date dob; private String email; private Long mobile; @Id @Column(name = "id") public int getId() { return id; } public void setId(int id) { this.id = id; } @Basic @Column(name = "name") public String getName() { return name; } public void setName(String name) { this.name = name; } @Basic @Column(name = "address") public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } @Basic @Column(name = "gender") public String getGender() { return gender; } public void setGender(String gender) { this.gender = gender; } @Basic @Column(name = "dob") public Date getDob() { return dob; } public void setDob(Date dob) { this.dob = dob; } @Basic @Column(name = "email") public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } @Basic @Column(name = "mobile") public Long getMobile() { return mobile; } public void setMobile(Long mobile) { this.mobile = mobile; } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; Contacts contacts = (Contacts) o; if (id != contacts.id) return false; if (name != null ? !name.equals(contacts.name) : contacts.name != null) return false; if (address != null ? !address.equals(contacts.address) : contacts.address != null) return false; if (gender != null ? !gender.equals(contacts.gender) : contacts.gender != null) return false; if (dob != null ? !dob.equals(contacts.dob) : contacts.dob != null) return false; if (email != null ? !email.equals(contacts.email) : contacts.email != null) return false; if (mobile != null ? !mobile.equals(contacts.mobile) : contacts.mobile != null) return false; return true; } @Override public int hashCode() { int result = id; result = 31 * result + (name != null ? name.hashCode() : 0); result = 31 * result + (address != null ? address.hashCode() : 0); result = 31 * result + (gender != null ? gender.hashCode() : 0); result = 31 * result + (dob != null ? dob.hashCode() : 0); result = 31 * result + (email != null ? email.hashCode() : 0); result = 31 * result + (mobile != null ? mobile.hashCode() : 0); return result; } }
配置文件:Contacts.hbm.xml
<?xml version='1.0' encoding='utf-8'?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping> <class name="com.sshblog.entity.Contacts" table="contacts" schema="SSHBlog"> <id name="id" column="id"/> <property name="name" column="name"/> <property name="address" column="address"/> <property name="gender" column="gender"/> <property name="dob" column="dob"/> <property name="email" column="email"/> <property name="mobile" column="mobile"/> </class> </hibernate-mapping>
4、使用IntelliJ IDEA生成实体类的好处
使用IntelliJ IDEA的Hibernate生成实体类的好处是方便编码,提升编码效率;
相比较Eclipse而言,IntelliJ IDEA自带Hibernate生成的机制,而Eclipse则需要下载插件。
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