小编Cha*_*kar的帖子

我正在使用JSON对象使用Spring MVC.当我想从RESTClient发送JSON对象时,我得到了

HTTP状态400 - 客户端发送的请求语法错误().

这是我的控制器

ObjectMapper mapper=new ObjectMapper();
@RequestMapping(value = "/addTask", method = RequestMethod.GET)
       public ModelAndView addTask(@RequestParam("json") String json) throws JsonParseException, JsonMappingException, IOException 
       {
          System.out.println("Json object from REST : "+json);
          Task task=(Task) mapper.readValue(json, Task);
          service.addService(task);
          return new ModelAndView("Result");
       }

我的请求网址: http://localhost:8080/Prime/addTask

我的Json对象:

{"taskName":"nothing","taskId":1234,"taskDesc":"什么都没做"}

我也尝试在RESTClient中指定"Content-Type:application/json"但仍然得到相同的错误

我收到了这个错误

java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'command' available as request attribute

这是堆栈跟踪

org.apache.jasper.JasperException:java.lang.IllegalStateException:BindingResult和bean名称'command'的普通目标对象都不能用作请求属性org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:534)org. apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:452)org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389)org.apache.jasper.servlet.JspServlet.service(JspServlet.java: 333)javax.servlet.http.HttpServlet.service(HttpServlet.java:722)根本原因java.lang.IllegalStateException:无法将BindingResult和bean名称'command'的普通目标对象用作请求属性org.springframework.web.servlet. support.BindStatus.(BindStatus.java:141)org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:178)org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormE lementTag.java:198)org.springframework.web.servlet.tags.form.LabelTag.autogenerateFor(LabelTag.java:129)org.springframework.web.servlet.tags.form.LabelTag.resolveFor(LabelTag.java:119) org.springframework.web.servlet.tags.form.LabelTag.writeTagContent(LabelTag.java:89)org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:102)org.springframework.web. servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:79)org.apache.jsp.student_jsp._jspx_meth_form_005flabel_005f0(student_jsp.java:182)org.apache.jsp.student_jsp._jspx_meth_form_005fform_005f0(student_jsp.java:117)org.apache. jsp.student_jsp._jspService(student_jsp.java:79)org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)javax.servlet.http.HttpServlet.service(HttpServlet.java:722)org.apache. jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:419)org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389)org.apache.jasper.se rvlet.JspServlet.service(JspServlet.java:333)javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

这是我的web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4"
    xmlns="http://java.sun.com/xml/ns/j2ee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">


    <display-name>Spring MVC Form Handling</display-name>
    <welcome-file-list>
    <welcome-file>student.jsp</welcome-file>
  </welcome-file-list>

  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>


    <servlet>
        <servlet-name>HelloWeb</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/HelloWeb-Servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>   

    <servlet-mapping>
        <servlet-name>HelloWeb</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:context="http://www.springframework.org/schema/context"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:mvc="http://www.springframework.org/schema/mvc"

   xsi:schemaLocation="
   http://www.springframework.org/schema/beans     
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/context 
   http://www.springframework.org/schema/context/spring-context-3.0.xsd
   http://www.springframework.org/schema/mvc
   http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

   <context:component-scan base-package="com.Prime" /> …