报错信息:
Exception in thread "main" org.apache.ibatis.reflection.ReflectionException: Error instantiating class com.sun.tools.javac.util.List with invalid types () or values (). Cause: java.lang.NoSuchMethodException: com.sun.tools.javac.util.List.()
at org.apache.ibatis.reflection.factory.DefaultObjectFactory.instantiateClass(DefaultObjectFactory.java:83)
at org.apache.ibatis.reflection.factory.DefaultObjectFactory.create(DefaultObjectFactory.java:45)
at org.apache.ibatis.reflection.factory.DefaultObjectFactory.create(DefaultObjectFactory.java:38)
at org.apache.ibatis.binding.MapperMethod.convertToDeclaredCollection(MapperMethod.java:138)
at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:131)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:90)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:40)
at com.sun.proxy.$Proxy0.findUserById(Unknown Source)
at com.mybatis.SQL.App.main(App.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: java.lang.NoSuchMethodException: com.sun.tools.javac.util.List.()
at java.lang.Class.getConstructor0(Class.java:3069)
at java.lang.Class.getDeclaredConstructor(Class.java:2165)
at org.apache.ibatis.reflection.factory.DefaultObjectFactory.instantiateClass(DefaultObjectFactory.java:57)
... 13 more
代码如下:
映射文件配置:
接口类:
public interface UserOrderMapper {
public List findUserById(Map keyMap);
}
domain类:
public class User {
private int id;//主键
private String username;
private Date birthday;
private String Sex;
private String address;
省略getter 和 setter方法
}
测试类:
public class App {
public static void main(String[] args) {
SqlSession session = MyBatisUtil.getSqlSession();
Map map = new HashMap();
// map.put("id",12);
map.put("address","%广%");
UserOrderMapper mapper = session.getMapper(UserOrderMapper.class);
List list = mapper.findUserById(map);
System.out.println(list);
}
}
请问我代码哪里出了问题,为何List
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List类import错了吧。你本意是import
java.util.List吧,但你的Mapper类import的是com.sun.tools.javac.util.List。UserOrderMapper里面import的List错了,应该是java.util.List