mybatis动态表名遇见There is no getter for property named 'tableName' in 'class java.lang.String'

（1）首先mybatis实现动态表名的sql语句

<select id="getData" resultType="java.util.HashMap" parameterType="String">        select * from ${tableName} order by Data_Index Desc limit 0,1    </select>

mvc控制器中传入sql的表名，从而实现查询不同表里的数据。
（2）却不想，半路掉链子了

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'tableName' in 'class java.lang.String'    at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:77)    at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446)    at com.sun.proxy.$Proxy15.selectOne(Unknown Source)    at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:166)    at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:82)    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)    at com.sun.proxy.$Proxy16.getData(Unknown Source)    at TestCase.test.test(test.java:37)

There is no getter for property named ‘tableName’ in ‘class java.lang.String’，意思就是String类没有名为’tableName’的属性

（3）原因：
Mybatis默认采用ONGL解析参数，所以会自动采用对象树的形式取string.tableName值，引起报错。

（4）解决办法：
再dao层接口中给相应的方法加上参数说明，如下：

mybatis映射文件的sql语句，如下：

注意：mybatis中加载sql语句可以分为预编译和非预编译，默认预编译，而 statementType=”STATEMENT”为非预编译，同时也必须使用${}来获取传入的参数值。

参考博客：mybtis动态表名之STATEMENT属性

Mybatis动态传入tableName–非预编译(STATEMENT)

（4）执行结果，如下：测试程序：package TestCase;import java.util.Map;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import dao.UserMapper;@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations ="classpath:spring/ApplicationContext.xml")//,"classpath:mapper/mapper.xmlpublic class test {    @Autowired    UserMapper userMapper;    @Test    public void test(){        try {            Map<String, Object> paraMap = userMapper.getParametersByModelId(1);            for(Object key:paraMap.keySet()){                System.out.println(key+":::"+paraMap.get(key));            }            String tableName = (String)paraMap.get("para_url");            System.out.println("**************"+tableName+"**************************");            Map<String, Object> dataMap = userMapper.getData(tableName);            for(Object key:dataMap.keySet()){                System.out.println("key="+key+",value="+dataMap.get(key));            }        } catch (Exception e) {            // TODO: handle exception            e.printStackTrace();        }    }}

控制台结果：