與JQuery/Ajax和Spring的JSON請求

Question

我對JSON/Spring MVC非常新，並試圖獲得一個簡單的AJAX調用Spring MVC控制器的例子 - 但我一直返回一個錯誤400 - 錯誤請求。

經過淘汰互聯網後，我發現這通常是由於沒有設置適當的內容類型導致 - 但[我相信]我已經這樣做了。

這裏是我的AJAX調用：

//validate the object 
    var urlString = "/ajax/add/"; 

    $.ajax({ 
     type:"POST", 
     url: urlString, 
     contentType: "application/json; charset=utf-8", 
     dataType: "json", 
     data: {value1: 'apples', value2 : 'oranges'}, 
     success: function(result){ 
      alert("success"); 
     }, 
     error: function(jqXHR, textStatus, errorThrown){ 
      alert("error:" + textStatus + " exception:" + errorThrown); 
     } 

    }) ; 

而且我的控制器：

@Controller 
itpublic class AddController { 

private static Logger m_log = null; 

@RequestMapping(value = "/ajax/add") 
public String handle(@RequestBody String json){ 

    DummyClass dummyRequest; 
    try { 

     ObjectMapper mapper = new ObjectMapper(); 
     dummyRequest = mapper.readValue(json, DummyClass.class); 
     m_log.info("Value1: " + dummyRequest.getValue1()); 
     m_log.info("Value2: " + dummyRequest.getValue2()); 
    } catch (Exception e) { 

    } 
    finally{ 


    } 
    return "called"; 
} 

誰能幫助我嗎？

編輯

這裏是我的背景下，我用它來配置Spring：

<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" 
xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" 
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 
    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd 
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 

<context:component-scan base-package="com.project.do" /> 

<!--<mvc:annotation-driven/> --> 

<bean class="com.project.do.interceptors.handler.mapping.HandlerInterceptorAnnotationAwareHandlerMapping "/> 

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" /> 

<bean class="com.project.do.viewresolver.ProjectViewResolver" > 
    <property name="tilesResolver" ref="tilesResolver" /> 
    <property name="jspResolver" ref="jspResolver" /> 
</bean> 

<bean id="tilesResolver" class ="org.springframework.web.servlet.view.UrlBasedViewResolver"> 
    <property name="viewClass" value="org.springframework.web.servlet.view.tiles2.TilesView" /> 
    <property name="order" value="2" /> 
</bean> 

<bean id="jspResolver" 
    class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
    <property name="prefix" value="/WEB-INF/jsp/" /> 
    <property name="suffix" value=".jsp" /> 
    <property name="order" value="3" /> 
</bean> 

<bean id ="tilesConfigurer" class="org.springframework.web.servlet.view.tiles2.TilesConfigurer"> 
    <property name="definitions" value="/WEB-INF/tiles/tiles.xml" /> 
    <property name="preparerFactoryClass" value="org.springframework.web.servlet.view.tiles2.SpringBeanPreparerFactory"/> 
</bean> 

<mvc:resources mapping="/css/**" location="/css/" /> 
<mvc:resources mapping="/js/**" location="/js/" /> 
<mvc:resources mapping="/images/**" location="/images/" /> 
<mvc:resources mapping="/javascript/**" location="/javascript/" /> 
<mvc:resources mapping="/scripts/**" location="/scripts/" /> 
<mvc:resources mapping="/styles/**" location="/styles/" /> 
<mvc:resources mapping="/help/**" location="/help/" /> 

<!-- <mvc:view-controller path="/" view-name="welcome"/> --> 

我要指出，我有阿賈克斯工作控制器在包com.project .do.working，但帶有Ajax和JSON的非工作控制器位於同一個包中com.project.do.not.working

Answer 1

我認爲你的請求映射沒有作爲POST的RequestMethod。我猜在默認情況下，它把它作爲一個get請求，但你的AJAX是一個POST請求。嘗試改變如下

@RequestMapping(value = "/ajax/add", method = RequestMethod.POST) 
public String handle(@RequestBody String json){ 
} 

Answer 2

@Controller 
@RequestMapping("/employee/add.htm") 
public class EmployeeController { 
    @RequestMapping(method = RequestMethod.POST) 
    public @ResponseBody 
    Employee add(HttpServletRequest request, HttpServletResponse response) 
      throws Exception { 


    } 
}