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1 正确
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 == @[email protected]"><!--right-->
area_table
</if>
where 1=1
<if test="cityName == @[email protected]"><!--right-->
and city_name=#{cityName}
</if>
2 错误
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。