Javascript @RequestBody 通过 Spring MVC JSON Jackson 处理器发送
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@RequestBody Sent Through Spring MVC JSON Hymanson Processor
提问by user1646481
I have read some many similiar problems inlcluding: JQuery, Spring MVC @RequestBody and JSON - making it work togetherJSON request with JQuery/Ajax with Spring
我已经阅读了许多类似的问题，包括：JQuery、Spring MVC @RequestBody 和 JSON - 使其与 JQuery/Ajax 和 Spring一起使用JSON 请求
The requirement is that the server will only accept application/json types. I am using a Spring MVC Controller. The code sends a response back as JSON through @ResponseBody. I want to get information through the @RequestBody in my Spring MVC Controller. I am using JSP to send JSON to Spring MVC Controller. My code and Spring MVC can be seen below:
要求是服务器只接受 application/json 类型。我正在使用 Spring MVC 控制器。该代码通过@ResponseBody 将响应作为 JSON 发送回。我想通过我的 Spring MVC 控制器中的 @RequestBody 获取信息。我正在使用 JSP 将 JSON 发送到 Spring MVC 控制器。我的代码和 Spring MVC 如下所示：
I am new to JSON and Javascript.
我是 JSON 和 Javascript 的新手。
JSP - index.jsp
JSP - index.jsp
<%@page language="java" contentType="text/html"%>
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript">
$('#myForm').on('submit', function(e) {
var frm = $("#myForm");
var dat = JSON.stringify(frm.serializeArray());
$.ajax({
type: 'POST',
url: $('#myForm').attr('action'),
data: dat,
contentType: 'application/json',
dataType: 'json',
error: function() {
alert('failure');
}
success: function(hxr) {
alert("Success: " + xhr);
}
});
);
};
</script>
</head>
<body>
<h2>Application</h2>
<form id="myForm" action="/application/save" method="POST" accept="application/json" onclick="i()">
<input type="text" name="userId" value="User">
<input type="submit" value="Submit">
</form>
</body>
</html>
When running this I am not getting any output. In the Chrome I get 404 Not found error and in Tomcat I get the following error:
运行它时，我没有得到任何输出。在 Chrome 中，我收到 404 Not found 错误，在 Tomcat 中我收到以下错误：
org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver handleNoSuchRequestHandlingMethod
WARNING: No matching handler method found for servlet request: path '/application/sa
ve', method 'POST', parameters map['userId' -> array<String>['User']]
Is something wrong here in the JSP part?
JSP 部分有什么问题吗？
web.xml
网页.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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_5.xsd"
version="2.5">
<display-name>WebApp</display-name>
<context-param>
<!-- Specifies the list of Spring Configuration files in comma separated format.-->
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/service.xml</param-value>
</context-param>
<listener>
<!-- Loads your Configuration Files-->
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>application</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>application</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
service.xml
服务.xml
<?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:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
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
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd">
<context:component-scan base-package="com.web"/>
<mvc:annotation-driven/>
<context:annotation-config/>
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>
<bean id="HymansonMessageChanger" class="org.springframework.http.converter.json.MappingHymansonHttpMessageConverter">
<property name="supportedMediaTypes" value="application/json"/>
</bean>
<!-- <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="HymansonMessageChanger"/>
</list>
</property>
</bean>-->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<util:list id="beanList">
<ref bean="HymansonMessageChanger"/>
</util:list>
</property>
</bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!-- <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="mediaTypes">
<map>
<entry key="json" value="application/json"/>
</map>
</property>
</bean>-->
Controller
控制器
package com.web;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RequestBody;
import com.webchannel.domain.User;
import com.webchannel.domain.UserResponse;
@Controller
@RequestMapping("/application/*")
public class SaveController {
@RequestMapping(value = "save", method = RequestMethod.POST, headers = {"content-type=application/json"})
public @ResponseBody UserResponse save(@RequestBody User user) throws Exception {
UserResponse userResponse = new UserResponse();
System.out.println("UserId :" + " " + user.getUserId());
return userResponse;
}
@RequestMapping(value = "delete", method = RequestMethod.GET)
public @ResponseBody UserResponse delete() {
System.out.println("Delete");
UserResponse userResponse = new UserResponse();
userResponse.setSuccess(true);
userResponse.setVersionNumber("1.0");
return userResponse;
} }
} }
When invoking /application/delete I get JSON returned. So I know my HymansonProcessor is configured correctly. The problem is in @RequestBody.
调用 /application/delete 时，返回 JSON。所以我知道我的 HymansonProcessor 配置正确。问题出在@RequestBody 中。
Where am I going wrong?
我哪里错了？
If I remove the headers in the code below I get a 415 error.
如果我删除下面代码中的标题，我会收到 415 错误。
@RequestMapping(value = "save", method = RequestMethod.POST)
public @ResponseBody UserResponse save(@RequestBody User user) throws Exception {
UserResponse userResponse = new UserResponse();
System.out.println("UserId :" + " " + user.getUserId());
return userResponse;
}
I am almost close but help would be appreciated.
我几乎接近，但帮助将不胜感激。
回答by ramsinb
I tried to play around a little more with your code however was unable to get the same error as you are getting. I've reworked the HTML:
我尝试更多地使用您的代码，但是无法获得与您相同的错误。我重新编写了 HTML：
<html>
<head>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.1/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$('#myForm').submit(function() {
var form = $( this ),
url = form.attr('action'),
userId = form.find('input[name="userId"]').val(),
dat = JSON.stringify({ "userId" : userId });
$.ajax({
url : url,
type : "POST",
traditional : true,
contentType : "application/json",
dataType : "json",
data : dat,
success : function (response) {
alert('success ' + response);
},
error : function (response) {
alert('error ' + response);
},
});
return false;
});
});
</script>
</head>
<body>
<h2>Application</h2>
<form id="myForm" action="application/save">
<input type="text" name="userId" value="User">
<input type="submit" value="Submit">
</form>
</body>
</html>
I had a very simple method similar to yours:
我有一个与您类似的非常简单的方法：
@RequestMapping(value = "save", method = RequestMethod.POST, headers = {"content-type=application/json"})
public @ResponseBody String save (@RequestBody User user) throws Exception
{
return "save-test";
}
My User class looks like this:
我的 User 类如下所示：
public class User
{
private String userId;
public User()
{
}
public String getUserId ()
{
return userId;
}
public void setUserId (String userId)
{
this.userId = userId;
}
}
My spring config was stripped down to contain:
我的 spring 配置被精简为包含：
<context:component-scan base-package="com.web"/>
<mvc:annotation-driven/>
<context:annotation-config/>
I'm using spring version 3.1.1 and jquery 1.8.1 (the latest I believe). I'm not getting the same error as you so perhaps you can try some of what I've done and see if that helps.
我正在使用 spring 版本 3.1.1 和 jquery 1.8.1（我相信是最新的）。我没有遇到和你一样的错误，所以也许你可以尝试我所做的一些事情，看看是否有帮助。
