mybatis動態傳入表名，欄位名，查詢條件進行查詢

菜鳥一枚，不足之處請多多指出

BaseMapper.xml

// BaseMapper.xml
<select id="findByFiled" resultType="java.util.Map" statementType="STATEMENT" >
       select ${fields} from ${tableName} where ${exa}
  </select>

BaseMapper.java

// BaseMapper.xml
    List<Map<String,
 
Object>> findByFiled(@Param("fields") String fields, @Param("tableName") String tableName, @Param("exa") String exa);

TestService.java

// BaseMapper.xml
    public List<Map<String, Object>> test() {
		return userMapper.findByFiled("*", "trd_user", " id=1 ");
	}