mybatis 判断字符是否相等

mybatis 判断字符是否相等

1.外面单引号 里面双引号表示字符串

　　　　　　　　<if test='showColumn == null or showColumn == "" '>
                srr.id
            </if>
            <if test='showColumn != null and showColumn != "" and showColumn != "*"'>
                srr.id,${showColumn}
            </if>
            <if test='showColumn != null and showColumn != "" and showColumn == "*"'>
                ${showColumn}
            </if>