我使用Spring MVC和JSP将JSON发送到Spring MVC Controller。实际上,我的JSON适用于1种方法,但不适用于另一种方法,我不明白为什么。代码如下:
JSP - index.jsp
<%@page language="java" contentType="text/html"%>
<html>
<head>
<script type="text/javascript" src="http://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>
<script type="text/javascript">
$(function() {
$('#emailForm').submit(function() {
var form = $( this ),
url = form.attr('action'),
from = form.find('input[name="from"]').val(),
to = form.find('input[name="to"]').val(),
body = form.find('input[name="body"]').val(),
subject = form.find('input[name="subject"]').val(),
fileName = form.find('input[name="fileName"]').val(),
location = form.find('input[name="location"]').val(),
dat = JSON.stringify({ "from" : from,"to" : to,"body" : body,"subject" : subject,"fileName" : fileName,"location" : location });
$.ajax({
url : url,
type : "GET",
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/history/save" method="POST">
<input type="text" name="userId" value="JUnit">
<input type="submit" value="Submit">
</form>
<form id="emailForm" action="/application/emailService/sendEmail" method="GET">
<input type="text" name="from" value="name@localhost.com">
<input type="text" name="to" value="user@localhost.com">
<input type="text" name="body" value="JUnit E-mail">
<input type="text" name="subject" value="Email">
<input type="text" name="fileName" value="attachment">
<input type="text" name="location" value="location">
<input type="submit" value="Send Email">
</form>
</body>
</html>
第一种形式正常工作,并在Spring MVC中保存。该代码的示例是:
@Controller
@RequestMapping("/history/*")
public class HistoryController {
@RequestMapping(value = "save", method = RequestMethod.POST, headers = {"content-type=application/json"})
public @ResponseBody UserResponse save(@RequestBody User user) throws Exception {
UserResponse userResponse = new UserResponse();
return userResponse;
}
对于第二种形式,我得到例外:
@Controller
@RequestMapping("/emailService/*")
public class EmailController {
@RequestMapping(value = "sendEmail", method = RequestMethod.GET, headers = {"content-type=application/json"})
public void sendEmail(@RequestBody Email email) {
System.out.println("Email Body:" + " " + email.getBody());
System.out.println("Email To: " + " " + email.getTo());
}
}
下面是堆栈跟踪:
java.io.EOFException: No content to map to Object due to end of input
org.codehaus.jackson.map.ObjectMapper._initForReading(ObjectMapper.java:2022)
org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:1974)
org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1331)
org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.readInternal(MappingJacksonHttpMessageConverter.java:135)
org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:154)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.readWithMessageConverters(HandlerMethodInvoker.java:633)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveRequestBody(HandlerMethodInvoker.java:597)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveHandlerArguments(HandlerMethodInvoker.java:346)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:171)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
我也试过使用POST,但仍然是同样的问题。我需要使用JSP将JSON数据发送到Spring MVC Controller。
我不确定问题出在哪里。
的beans.xml
<context:component-scan base-package="com.web"/>
<mvc:annotation-driven/>
<context:annotation-config/>
有什么想法吗?
修改
public class Email implements Serializable {
private String from;
private String to;
private String body;
private String subject;
private String fileName;
private String location;
public Email() {
}
// Getters and setters
}
发送的JSON是form2,即#emailForm。
答案 0 :(得分:1)
我遇到了同样的问题,但我使用curl来验证服务器端功能。
我的curl命令中的初始数据部分是
-d "{'id':'123456', 'name':'QWERT'}"
将命令更改为
后 -d '{"id":"123456", "name":"QWERT"}'
然后它奏效了。
希望这会给出一些提示。
答案 1 :(得分:1)
您应该检查是否设置了“内容长度”标题。
答案 2 :(得分:0)
当我尝试使用带有路径参数的POST方法时遇到了这个问题,但是我忘记放'@PathParam("id") Integer id'
了,我只是将'Integer id '
放在了参数中。