PS：在ITeye上面问了两次都没能解决问题，不给力啊。
很简单的一个测试；用Speak s = (Speak)session.get(Speak.class, 1);得到Speak对象之后，s.getAttachmentFlag()竟然取不到值，确切的说是取到的值为""；真要我小命！
相关代码如下：
1、数据库中有speak表，speak表中有attachment_flag字段；
2、attachment_flag字段的getter和setter方法hibernate自动生成的，应该没问题；
3、数据库的配置<mapping resource="com/shaiyaya/dao/Speak.hbm.xml" /> 应该也没问题；
4、测试语句：
- Java code
Session session = HibernateSessionFactory.getSession(); Transaction tran = session.beginTransaction(); Speak s = (Speak)session.get(Speak.class, 1); System.out.println("at:"+s.getAttachmentFlag()); tran.commit(); session.close(); return "success"; 其它字段的值都能取到， 但就是取不到attachment_flag字段的值；前几天还是好的啊！好像是加了索引什么的就这样了，不知道是不是原因。不过删除了索引speak的所有索引也没解决问题……
speak.hbm.xml里面attachmentFlag字段的配置
- XML code
<property name="attachmentFlag" type="java.lang.String"> <column name="attachment_flag" length="20"></column> </property>
其他字段都是能取出值来的，就是这个字段取不出值；并且我用session.update()方法的时候，不管传什么值，这个字段都是变成"";而其它字段都更新了的。
speak表的DDL：
- Java code
-- Table "speak" DDL CREATE TABLE `speak` ( `speak_id` int(11) NOT NULL auto_increment, `user_id` int(11) default NULL, `content` mediumtext, `create_time` timestamp NULL default NULL on update CURRENT_TIMESTAMP, `last_comm_time` timestamp NULL default NULL COMMENT '后评论最时间', `cate_flag` varchar(50) default NULL COMMENT 'twitter,style,topic', `x_id` int(11) default NULL COMMENT '现表示的是forum的id', `attachment_flag` varchar(20) default '0' , `comment_sum` int(11) default '0' COMMENT '应相的speak被评论的次数', `love_sum` int(11) default '0' COMMENT '对应的speak被喜欢的次数', `forward_sum` int(11) default '0' COMMENT '对应的speak被转发的次数', PRIMARY KEY (`speak_id`), KEY `user_id` (`user_id`), KEY `love_sum` (`love_sum`), KEY `cate_flag` (`cate_flag`), KEY `attachment_flag` (`attachment_flag`), CONSTRAINT `speak_ibfk_1` FOREIGN KEY (`user_id`) REFERENCES `user` (`user_id`) ON DELETE CASCADE ON UPDATE CASCADE ) ENGINE=InnoDB DEFAULT CHARSET=gbk;
speak.java
- Java code
package com.shaiyaya.dao; import java.util.Date; /** * Speak entity. * * @author MyEclipse Persistence Tools */ public class Speak implements java.io.Serializable { // Fields private Integer speakId; private User user; private String content; private Date createTime; private Date lastCommTime; private String cateFlag; private Integer XId; private String attachmentFlag; private Integer commentSum; private Integer loveSum; private Integer forwardSum; // Constructors /** default constructor */ public Speak() { } /** full constructor */ public Speak(User user, String content, Date createTime, Date lastCommTime, String cateFlag, Integer XId, String attachmentFlag, Integer commentSum, Integer loveSum, Integer forwardSum) { this.user = user; this.content = content; this.createTime = createTime; this.lastCommTime = lastCommTime; this.cateFlag = cateFlag; this.XId = XId; this.attachmentFlag = attachmentFlag; this.commentSum = commentSum; this.loveSum = loveSum; this.forwardSum = forwardSum; } // Property accessors public Integer getSpeakId() { return this.speakId; } public void setSpeakId(Integer speakId) { this.speakId = speakId; } public User getUser() { return this.user; } public void setUser(User user) { this.user = user; } public String getContent() { return this.content; } public void setContent(String content) { this.content = content; } public Date getCreateTime() { return this.createTime; } public void setCreateTime(Date createTime) { this.createTime = createTime; } public Date getLastCommTime() { return this.lastCommTime; } public void setLastCommTime(Date lastCommTime) { this.lastCommTime = lastCommTime; } public String getCateFlag() { return this.cateFlag; } public void setCateFlag(String cateFlag) { this.cateFlag = cateFlag; } public Integer getXId() { return this.XId; } public void setXId(Integer XId) { this.XId = XId; } public String getAttachmentFlag() { return this.attachmentFlag; } public void setAttachmentFlag(String attachmentFlag) { this.attachmentFlag = attachmentFlag; } public Integer getCommentSum() { return this.commentSum; } public void setCommentSum(Integer commentSum) { this.commentSum = commentSum; } public Integer getLoveSum() { return this.loveSum; } public void setLoveSum(Integer loveSum) { this.loveSum = loveSum; } public Integer getForwardSum() { return this.forwardSum; } public void setForwardSum(Integer forwardSum) { this.forwardSum = forwardSum; }