org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'null' not supported
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Thu Jan 04 17:33:41 CST 2018
There was an unexpected error (type=Unsupported Media Type, status=415).
Content type 'null' not supported
产生错误的代码：
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
@RestController
@Scope("prototype")
@RequestMapping("/rest/test")
public class TestController {
@Autowired
private BaseAreaMapper baseAreaMapper;
public TestController() {
// TODO Auto-generated constructor stub
}
@RequestMapping(value = "/users/{username}", method = RequestMethod.GET, consumes = "application/json")
public @ResponseBody String getUser(@PathVariable(value="username") String username, @RequestParam(value="pwd", required=false) String pwd) throws Exception {
return "Welcome," + username + ",Your pwd is:" + pwd ;
}
}其实问题的关键就是：
@RequestMapping(value = "/users/{username}", method = RequestMethod.GET, consumes = "application/json")中的“
, consumes = "application/json"”
把这个参数去掉就可以了。访问结果如下：
上面去掉的参数什么意思呢？
其实是要求客户端调用的时候，以
application/json格式提交参数数据。
参考：
java.io.IOException: Server returned HTTP response code: 415 for URL:xxxxxx
另见下面的 AJAX 调用示例：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>测试 type=Unsupported Media Type, status=415 问题</title>
<meta name="keywords" content="Unsupported,Media,Type,status,415" />
<meta name="description"
content="测试 type=Unsupported Media Type, status=415 问题" />
<script type="text/javascript"
src="jquery-1.10.2.min.js"></script>
<script type="text/javascript">
function doRequest() {
$.ajax({
url : "/rest/test/users/abc",
contentType:"application/json",
context : document.body,
data:{"pwd":"123"},
dataType:"text",
success : function(data) {
$("#txtRep").val(data);
},
error : function(req, err, ex) {
$("#txtRep").val(req.responseText + "\r\n" + err + "\r\n" + ex);
}
});
}
</script>
</head>
<body>
<p>测试 type=Unsupported Media Type, status=415 问题</p>
<textarea id="txtRep" cols="50" rows="20"></textarea>
<input type="button" value="submit" onclick="doRequest()">
</body>
</html>指定：
contentType:"application/json"
