我在从DAO生成JSON时遇到错误,这是我的代码
控制器
@RequestMapping(value="/findAdpId/", method=RequestMethod.POST , consumes = "application/json", produces = "application/json")
public @ResponseBody AllCustomerHist findAdpId(@RequestBody AllCustomerHist customer){
String customerId = customer.getCustomerId();
String srctable = customer.getSrctable();
System.out.println("customer ID = "+customerId);
System.out.println("srctable = "+srctable);
List<AllCustomerHist> adpcust = allCustomerHistService.findAdpId(customerId, srctable);
return (AllCustomerHist) adpcust;
}
DAO课程
@SuppressWarnings("unchecked")
public List<AllCustomerHist> findAdpId(String customerId, String srctable) {
// TODO Auto-generated method stub
Criteria criteria = getSession().createCriteria(AllCustomerHist.class)
.setProjection(Projections.projectionList()
.add(Projections.property("adpId"), "adpId"))
.add(Restrictions.eq("customerId", customerId))
.add(Restrictions.eq("srctable", srctable));
return (List<AllCustomerHist>)criteria.list();
}
我想要的是,在检索像
这样的JSON时{
"customerId":"11",
"srctable":"transaction"
}
我的DAO课程将产生
{
"adpId":["abcd123","defw123"]
}
这是错误日志
异常
org.springframework.web.util.NestedServletException:Request 处理失败;嵌套异常是java.lang.ClassCastException: java.util.ArrayList无法强制转换为 com.astra.adp.model.AllCustomerHist
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
根本原因
java.lang.ClassCastException:java.util.ArrayList无法强制转换为 com.astra.adp.model.AllCustomerHist
com.astra.adp.controller.CustomerController.findAdpId(CustomerController.java:73)
sun.reflect.NativeMethodAccessorImpl.invoke0(原生方法)
sun.reflect.NativeMethodAccessorImpl.invoke(未知来源)
sun.reflect.DelegatingMethodAccessorImpl.invoke(未知来源)
java.lang.reflect.Method.invoke(Unknown Source)
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
注意服务器中提供了根本原因的完整堆栈跟踪 日志。
谢谢你的帮助!