[英]How to map Enum type in mybatis using typeHandler on insert
我已經用enum打了一段時間,但它不會按我的方式行事。 有沒有人可以給我提示? 我試圖在MySql中使用Enum類型,我也在我的代碼中使用Enum類。
由於代碼現在它將插入星期一,但它也會嘗試在workdayID上插入MONDAY ...我沒有得到workdayID。 我相信我必須以某種方式處理DAY_TYPE ...定義一個typeHandler也許? 但我試過了,它不會起作用,或者因為我無法正確做到這一點?
我也試過了org.apache.ibatis.type.EnumTypeHandler,但沒有成功,就像這樣
#{DAY_TYPE,typeHandler=org.apache.ibatis.type.EnumTypeHandler}
DAY_TYPE.java
package tut.model;
import java.io.Serializable;
public enum DAY_TYPE implements Serializable{
MONDAY(1),TUESDAY(2),WEDNESDAY(3),THURSDAY(4),FRIDAY(5),SATURDAY(6),SUNDAY(7);
private int id; private int workdayID;
private DAY_TYPE(int id) { this.id = id; }
public int getId() { return id; }
public void setId(int id) { this.id = id; }
public int getWorkdayID() { return workdayID; }
public void setWorkdayID(int workdayID) {this.workdayID = workdayID;}
}
DAY_TYPE_Mapper.xml
<insert id="insert" parameterType="DAY_TYPE" useGeneratedKeys="true" keyProperty="iddaytaype">
INSERT INTO daytaype (DAY_TYPE, workdayID)
VALUES (#{DAY_TYPE},#{workdayID})
<selectKey keyProperty="iddaytaype" resultType="long" order="AFTER">
SELECT LAST_INSERT_ID();
</selectKey>
</insert>
<!-- <insert id="insert" parameterMap="insert-params" useGeneratedKeys="true" keyProperty="iddaytaype"> -->
<parameterMap id="insert-params" type="DAY_TYPE">
<parameter property="DAY_TYPE" javaType="DAY_TYPE" typeHandler="mappings.XenumTypeHandler" />
<parameter property="workdayID" javaType="int" />
</parameterMap>
我的數據庫表
CREATE TABLE `daytaype` (
`iddaytaype` int(11) NOT NULL AUTO_INCREMENT,
`DAY_TYPE` enum('MONDAY','TUESDAY','WEDNESDAY','THURSDAY','FRIDAY','SATURDAY','SUNDAY') NOT NULL,
`workdayID` int(11) unsigned DEFAULT NULL,
PRIMARY KEY (`iddaytaype`),
KEY `fk_workDayID_idWorkDay` (`workdayID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;=InnoDB DEFAULT CHARSET=utf8;
工作日就是這樣存在的
public class Workday implements Serializable{
private long idWorkDay;
private Date start;
private Date end;
private List<Workbreak> workBreaks;
private DAY_TYPE DAY_TYPE;
private long workweekID;
getter setter....
正確的解決方案當然是在工作日表中添加枚舉...它將減少我相信的數據庫抓取。
<insert id="insert" parameterType="workday" useGeneratedKeys="true" keyProperty="idWorkDay">
INSERT INTO workday
( start , end , workweekID , DAY_TYPE )
VALUES (
#{start},
#{end},
#{workweekID},
#{DAY_TYPE, typeHandler=org.apache.ibatis.type.EnumTypeHandler}
)
<selectKey keyProperty="idWorkDay" resultType="long" order="AFTER">
SELECT LAST_INSERT_ID();
</selectKey>
</insert>
現在刪除daytaype表並直接在工作日表中添加枚舉。
CREATE TABLE `workday` (
`idworkday` int(11) NOT NULL AUTO_INCREMENT,
`start` time DEFAULT '08:00:00',
`end` time DEFAULT '17:00:00',
`workweekID` int(11) DEFAULT NULL,
`DAY_TYPE` enum('MONDAY','TUESDAY','WEDNESDAY','THURSDAY','FRIDAY','SATURDAY','SUNDAY') DEFAULT NULL,
PRIMARY KEY (`idworkday`),
KEY `fk_workweek_workweekID` (`workweekID`),
CONSTRAINT `fk_workweek_workweekID` FOREIGN KEY (`workweekID`) REFERENCES `workweek` (`idworkweek`) ON DELETE CASCADE ON UPDATE NO ACTION
) ENGINE=InnoDB AUTO_INCREMENT=139 DEFAULT CHARSET=utf8 ;
您案例中的DAY_TYPE包含成員ID。 現在,如果您將ENUM作為id存儲在數據庫中,即使您沒有將Enum與數據庫同步,也可以使用可以為您處理DAY_TYPE的CustomEnumTypeHandler。
覆蓋getter setter。 我喜歡這個:
@Column(name = "type")
private MailType type;
public String getType(){
return type.name();
}
public void setType(String type){
this.type = MailType.valueOf(type);
}
public MailType getTypeEnum(){
return type;
}
public void setTypeEnum(MailType type){
this.type = type;
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.