hibernate id 生成策略 annotation @GeneratedValue

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丫的点击率都达到400多了，都没一个给我评论，那么多伸手党。

 小心走夜路被人爆菊花。。

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package com.bluedon.ism.commons.entity;

// Generated 2012-7-26 18:24:17 by Hibernate Tools 3.4.0.CR1

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.GeneratedValue;
import javax.persistence.SequenceGenerator;
import static javax.persistence.GenerationType.SEQUENCE;
import javax.persistence.Table;

/**
* District generated by hbm2java
*/
@Entity
@Table(name = "DISTRICT", schema = "ISM_ACCOUNT")
public class District implements java.io.Serializable {

private String did;
private String districtName;
private String description;
private String parentId;

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "DID", unique = true, nullable = false, length = 100)
public String getDid() {
return this.did;
}

public void setDid(String did) {
this.did = did;
}

@Column(name = "DISTRICT_NAME", nullable = false, length = 100)
public String getDistrictName() {
return this.districtName;
}

public void setDistrictName(String districtName) {
this.districtName = districtName;
}

@Column(name = "DESCRIPTION")
public String getDescription() {
return this.description;
}

public void setDescription(String description) {
this.description = description;
}

@Column(name = "PARENT_ID", length = 32)
public String getParentId() {
return this.parentId;
}

public void setParentId(String parentId) {
this.parentId = parentId;
}

}

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jpa里包
http://repo2.maven.org/maven2/javax/persistence/persistence-api/1.0/

参见 http://blog.sina.com.cn/s/blog_80e498b10100vjcc.html 百度之