org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'parentId' in 'class java.lang.String'

时间：2016-08-09 20:39:41 阅读：470 评论：0 收藏：0 [点我收藏+]

Caused by: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named ‘parentId‘ in ‘class java.lang.String‘
    at org.apache.ibatis.reflection.Reflector.getGetInvoker(Reflector.java:333)
    at org.apache.ibatis.reflection.MetaClass.getGetInvoker(MetaClass.java:160)
    at org.apache.ibatis.reflection.wrapper.BeanWrapper.getBeanProperty(BeanWrapper.java:151)
    at org.apache.ibatis.reflection.wrapper.BeanWrapper.get(BeanWrapper.java:44)
    at org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:123)
    at org.apache.ibatis.builder.xml.dynamic.DynamicContext$ContextMap.get(DynamicContext.java:89)
    at org.apache.ibatis.builder.xml.dynamic.DynamicContext$ContextAccessor.getProperty(DynamicContext.java:107)
    at org.apache.ibatis.ognl.OgnlRuntime.getProperty(OgnlRuntime.java:1657)
    at org.apache.ibatis.ognl.ASTProperty.getValueBody(ASTProperty.java:92)
    at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
    at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:210)
    at org.apache.ibatis.ognl.ASTNotEq.getValueBody(ASTNotEq.java:49)
    at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
    at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:210)
    at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:333)
    at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:413)
    at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:395)
    at org.apache.ibatis.builder.xml.dynamic.OgnlCache.getValue(OgnlCache.java:42)
    at org.apache.ibatis.builder.xml.dynamic.ExpressionEvaluator.evaluateBoolean(ExpressionEvaluator.java:32)
    at org.apache.ibatis.builder.xml.dynamic.IfSqlNode.apply(IfSqlNode.java:30)
    at org.apache.ibatis.builder.xml.dynamic.MixedSqlNode.apply(MixedSqlNode.java:29)
    at org.apache.ibatis.builder.xml.dynamic.TrimSqlNode.apply(TrimSqlNode.java:42)
    at org.apache.ibatis.builder.xml.dynamic.MixedSqlNode.apply(MixedSqlNode.java:29)
    at org.apache.ibatis.builder.xml.dynamic.TrimSqlNode.apply(TrimSqlNode.java:42)
    at org.apache.ibatis.builder.xml.dynamic.MixedSqlNode.apply(MixedSqlNode.java:29)
    at org.apache.ibatis.builder.xml.dynamic.MixedSqlNode.apply(MixedSqlNode.java:29)
    at org.apache.ibatis.builder.xml.dynamic.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:37)
    at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:241)
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:79)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:101)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:95)
    at sun.reflect.GeneratedMethodAccessor143.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:355)
    ... 73 more

sql:

<![CDATA[
         SELECT inn.inner_org_id, inn.org_code FROM inner_org inn, org_relation rel WHERE inn.inner_org_id=rel.relation_id and rel.parent_id = #{parentId}
     ]]>

解决方法：

将参数名（上面的例子为’parentId’）替换为”_parameter”

github大神相关问题的回答:

As documented, parameterType is optional and it is usually better to let MyBatis detect it.
As your statement has one simple type parameter without @Param annotation, you need to use the implicit name _parameter to reference it in the OGNL expression or ${}.
Java does not allow us to obtain the parameter name at runtime, unfortunately.Please search ‘java parameter name’ for more detailed explanation.

So, as I explained, you may have to
1) modify the xml mapper as follows:

1
2
3

<when test="_parameter &lt; 0">
  id = 0-#{id}
</when>

Or 2) add @Param(“id”) to the method parameter.

1	User findById(@Param("id")int id);

org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'parentId' in 'class java.lang.String'

原文：http://www.cnblogs.com/jager/p/5754445.html

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