本篇内容主要讲解“Mybatis条件if test怎么使用枚举值”,感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷,实用性强。下面就让小编来带大家学习“Mybatis条件if test怎么使用枚举值”吧!
package com.weather.weatherexpert.common.utils;
/**
* <p>Title: </p>
* <p>Description: </p>
*
* @Author
* @CreateTime
*/
public enum City {
XINZHOU(100002,"忻州"),
DATONG(100003,"大同"),
TAIYUAN(100001,"太原");
private final Integer code;
private final String name;
City(Integer value, String desc) {
this.code = value;
this.name = desc;
}
public Integer getCode() {
return code;
}
public String getName() {
return name;
}
}
xml:
<!--<if test="cityName == @com.weather.weatherexpert.common.utils.City.XINZHOU@getName"><!–wrong,java.lang.ClassNotFoundException: Unable to resolve class: com.weather.weatherexpert.common.utils.City.XINZHOU–>-->
<!--<if test="cityName == @com.weather.weatherexpert.common.utils.City@XINZHOU@getName"><!–wrong,[org.apache.ibatis.ognl.ParseException: Encountered " "@" "@ "" at line 1, column 65.–>-->
<if test="cityName == @com.weather.weatherexpert.common.utils.City@XINZHOU.getName"><!--right-->
area_table
</if>
where 1=1
<if test="cityName == @com.weather.weatherexpert.common.utils.City@XINZHOU.getName"><!--right-->
and city_name=#{cityName}
</if>
package com.weather.weatherexpert.common.utils;
/**
* <p>Title: </p>
* <p>Description: </p>
*
* @Author
* @CreateTime
*/
public class CityClass {
public static enum CityEnum {
XINZHOU(100002, "忻州"),
DATONG(100003, "大同"),
TAIYUAN(100001, "太原");
private final Integer code;
private final String name;
CityEnum(Integer value, String desc) {
this.code = value;
this.name = desc;
}
public Integer getCode() {
return code;
}
public String getName() {
return name;
}
}
}
xml:
/* Caused by: org.apache.ibatis.builder.BuilderException: Error evaluating expression
'cityName == @com.weather.weatherexpert.common.utils.CityClass@CityEnum.XINZHOU.getName'. Cause: org.apache.ibatis.ognl.OgnlException:
Could not get static field CityEnum from class com.weather.weatherexpert.common.utils.CityClass [java.lang.NoSuchFieldException: CityEnum]*/
<if test="cityName == @com.weather.weatherexpert.common.utils.CityClass@CityEnum.XINZHOU.getName"><!--wrong-->
area_table
</if>
可见,直接定义的枚举类可以正常使用,在类中定义的枚举类这样使用会报错,可能方法还没有找到。
如下正确:
<if test="cityName == @com.a.b.c.CityClass$CityEnum@XINZHOU.getName"><!--right-->
name = #{username}
</if>
<if test="dtEnum == @com.xxx.xxx.TestTypeEnum@HOUR">
DATE_FORMAT(TM,'%Y-%m-%d %H') as keyStr,
</if>
HOUR
("hour"),
DAY
("day"),
MONTH
("month"),
YEAR
("year");
到此,相信大家对“Mybatis条件if test怎么使用枚举值”有了更深的了解,不妨来实际操作一番吧!这里是亿速云网站,更多相关内容可以进入相关频道进行查询,关注我们,继续学习!
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