Sql 不支持的操作异常mybatis

在这段代码中，我想要的是一个来自外部的随机SQL查询，它将被加载到一个属性文件中。到现在为止，我已经有了一个属性文件，其中包含一个查询来测试这一点。所以我想要一些数据，标题和下面的所有数据。基本上只是数据开始，就像这个测试应该做的那样。但是我得到了下面链接的错误消息。我一辈子都搞不清楚我的问题在哪里。请帮忙！：）

我有以下代码

DataHandler类

public class DataHandler{

DataService dataService = new DataService();

public String getPropertyValue() throws IOException {
    Properties prop = new Properties();
    String propFileName = "randomSqlQuery.properties";

    InputStream inputStream = getClass().getClassLoader().getResourceAsStream(propFileName);
    prop.load(inputStream);
    if (inputStream == null) {
        throw new FileNotFoundException("property file '" + propFileName + "' not found in the classpath");
    }
    String result = prop.getProperty("sqlQuery");
    return result;
}

public Data getKeysAndValues() throws IOException {
    String query = getPropertyValue();
    List<List<Object>> randomSqlQuery = dataService.getRandomSqlQuery(query);
    List<List<Object>> recordList = new ArrayList<>();
    List<String> headline = new ArrayList();

    if (randomSqlQuery != null && randomSqlQuery.size() > 0) {
        {
            List<Object> record = randomSqlQuery.get(0);
            getHeadlines(record, headline);
        }
        for (int i = 1; i < randomSqlQuery.size(); i++) {
            List<Object> singleRecord = randomSqlQuery.get(i);
            recordList.add(singleRecord);
            System.out.println(recordList);
        }
    }
    return new DataImpl(headline, recordList);
}

private void getHeadlines(List<Object> record, List<String> headline) {
    for (Object headlineName : record) {
        headline.add((String) headlineName);
        System.out.println(headlineName);
    }
}
}  

这是我的错误

 ### Error querying database.  Cause: java.lang.UnsupportedOperationException 
 ### The error may exist in nd/mappers/DataMapper.xml 
  ### The error may involve defaultParameterMap 
 ### The error    occurred while setting parameters 
 ### SQL: SELECT * FROM PERSON ### Cause:    java.lang.UnsupportedOperationException
org.apache.ibatis.exceptions.PersistenceException
### Error querying database.  Cause: java.lang.UnsupportedOperationException
### The error may exist in nd/mappers/DataMapper.xml
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: SELECT * FROM PERSON
### Cause: java.lang.UnsupportedOperationException
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:111)

---

不知道该怎么办。SQL来自属性文件。很抱歉收到了大量的文本。

我刚刚解决了相同的错误消息。问题在于：

<select id="getRandomSqlQuery" resultType="Person">
    ${query}
</select>

此外，您还需要在此处检查

null

：

try {
     DataMapper dataMapper = qlSession.getMapper(DataMapper.class);
     return dataMapper.getRandomSqlQuery(query);
} finally {
     if (sqlSession != null) {
         sqlSession.close();
     }
}

---

就我所使用的MyBatis而言，传递参数的语法是#{query}，而不是${query}。请检查错误是否与此更改不同。若要传递@Param（“query”）之类的参数，我需要使用${query}，否则，我会得到如下错误：MySQLSyntaxErrorException，它也找不到我的sqlquery。可悲的是，事实并非如此=（好的..我刚刚检查了DefaultSqlSession.java的selectList方法，该方法期望List作为返回类型。List可能不受支持。请尝试使用List，然后相应地处理该对象。查看现在是否有任何错误。感谢帮助，我们刚刚从另一个站点获得了一些帮助，尝试将其作为hashmap返回，然后转换为List。

public class DataService implements DataMapper {

@Override
public List<List<Object>> getRandomSqlQuery(String query) {
    SqlSession sqlSession = MyBatisUtil.getSqlSessionFactory().openSession();
    try {
        DataMapper dataMapper = sqlSession.getMapper(DataMapper.class);
        return dataMapper.getRandomSqlQuery(query);
    } finally {
        sqlSession.close();
    }
}
}

//dataHandler instantiated in top
    @Test
public void getKeysAndValues() throws IOException {
    dataHandler.getKeysAndValues();
}

 ### Error querying database.  Cause: java.lang.UnsupportedOperationException 
 ### The error may exist in nd/mappers/DataMapper.xml 
  ### The error may involve defaultParameterMap 
 ### The error    occurred while setting parameters 
 ### SQL: SELECT * FROM PERSON ### Cause:    java.lang.UnsupportedOperationException
org.apache.ibatis.exceptions.PersistenceException
### Error querying database.  Cause: java.lang.UnsupportedOperationException
### The error may exist in nd/mappers/DataMapper.xml
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: SELECT * FROM PERSON
### Cause: java.lang.UnsupportedOperationException
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:111)

<select id="getRandomSqlQuery" resultType="Person">
    ${query}
</select>

<typeAliases>
    <typeAlias alias="Person" type="com.example.bean.Book"/>  
</typeAliases>  

try {
     DataMapper dataMapper = qlSession.getMapper(DataMapper.class);
     return dataMapper.getRandomSqlQuery(query);
} finally {
     if (sqlSession != null) {
         sqlSession.close();
     }
}