错误“java.lang.NumberFormatException：对于输入字符串：”“”传递JSON数组到Spring-MVC

我得到错误“java.lang.NumberFormatException：对于输入字符串：”“”传递JSON数组到Spring-MVC ..错误“java.lang.NumberFormatException：对于输入字符串：”“”传递JSON数组到Spring-MVC

这里是我的JSON JavaScript调用：

function doAjaxPost() { 

     var inData = {}; 

     inData.nameList = ['kurt','johnathan']; 
     inData.educationList = ['GSM','HardKnocks']; 

     htmlStr = JSON.stringify(inData); 
     alert(htmlStr); 

     $.post(contexPath + "/AddUser.htm", inData, function(outData, outStatus){ 
      alert(outStatus); 

     }); 
};

这里是我的Java bean：

public class User { 

    private String name = null; 
    private String education = null; 

    private List nameList = new ArrayList(); 
    private List educationList = new ArrayList(); 

    public List getNameList() { 
     return nameList; 
    } 

    public List getEducationList() { 
     return educationList; 
    } 

    public void setNameList(List nameList) { 
     this.nameList = nameList; 
    } 

    public void setEducationList(List educationList) { 
     this.educationList = educationList; 
    } 

    public String getName() { 
     return name; 
    } 
    public void setName(String name) { 
     this.name = name; 
    } 
    public String getEducation() { 
     return education; 
    } 
    public void setEducation(String education) { 
     this.education = education; 
    } 

}

这是我在Java中的控制器，Spring的MVC：

@RequestMapping(value="/AddUser.htm",method=RequestMethod.POST) 
    public @ResponseBody JsonResponse addUser(@ModelAttribute(value="user") User user, BindingResult result){ 
     JsonResponse res = new JsonResponse(); 

     if(!result.hasErrors()){ 
      res.setStatus("SUCCESS"); 
      res.setResult(userList); 
     }else{ 
      res.setStatus("FAIL"); 
      res.setResult(result.getAllErrors()); 
     } 

     return res; 
    }

下面是我得到的错误：

SEVERE: Servlet.service() for servlet Spring MVC Dispatcher Servlet threw exception 
java.lang.NumberFormatException: For input string: "" 
    at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) 
    at java.lang.Integer.parseInt(Integer.java:493) 
    at java.lang.Integer.parseInt(Integer.java:514) 
    at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:952) 
    at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:896) 
    at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:76) 
    at org.springframework.validation.DataBinder.applyPropertyValues(DataBinder.java:673) 
    at org.springframework.validation.DataBinder.doBind(DataBinder.java:569) 
    at org.springframework.web.bind.WebDataBinder.doBind(WebDataBinder.java:190) 
    at org.springframework.web.bind.ServletRequestDataBinder.bind(ServletRequestDataBinder.java:110) 
    at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.doBind(AnnotationMethodHandlerAdapter.java:712) 
    at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doBind(HandlerMethodInvoker.java:804) 
    at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveHandlerArguments(HandlerMethodInvoker.java:358) 
    at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:170) 
    at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:421) 
    at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:409) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:774) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644) 
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) 
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602) 
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    at java.lang.Thread.run(Thread.java:679)

来源

2012-05-31 SJS

何时抛出此错误？ – Michael

这个问题有一些细节，可能有所帮助：http://stackoverflow.com/questions/5900840/post-nested-object-to-spring-mvc-controller-using-json – GriffeyDog

你能至少接受我以前的答案，之后你最初降低了它的价值，然后通过使用教育和名称列表来接受我的建议。 http://stackoverflow.com/questions/10839904/how-to-pass-a-json-array-to-spring-mvc/ – dardo

我敢肯定缺乏在bean仿制药的问题是：

private List nameList = new ArrayList(); 
private List educationList = new ArrayList();

它应该是：

private List<String> nameList = new ArrayList<String>(); 
private List<String> educationList = new ArrayList<String>(); 
// change getters and setters also

JSON映射器将查看字段的通用类型以决定它是否可以ca n映射值。

来源

2012-06-01 06:41:30

我修改了你所要求的修改，但我仍然收到以下错误：SEVERE：servlet的Servlet.service（）Spring MVC Dispatcher Servlet抛出异常 java.lang.NumberFormatException：对于输入字符串：”“ – SJS

这是为什么如果OP表示这并没有解决他们的问题，接受答案？ –

错误“java.lang.NumberFormatException：对于输入字符串：”“”传递JSON数组到Spring-MVC

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