response.Header裏常見Content-Type一般有以下四種：

application/x-www-form-urlencoded
multipart/form-data
application/json
text/xml
詳解:
1.application/x-www-form-urlencoded

application/x-www-form-urlencoded是最常見的Content-Type,form表單默認提交方式對應的content-type.

當action為get時候，瀏覽器用x-www-form-urlencoded的編碼方式把form數據轉換成一個字串（name1=value1&name2=value2...），然後把這個字串追加到url後面，用?分割，加載這個新的url.
當action為post,且表單中沒有type=file類型的控件時,Content-Type也將采用此編碼方式,form數據將以key:value鍵值對的方式傳給server.

表單提交:

 <form action="/test" method="post">
<input type="text" name="name" value="zhangsan"> 
<input type="text" name="age" value="12"> 
<input type="text" name="hobby" value="football">
  </form>
 

後臺:

import java.io.Serializable;

public class Student implements Serializable {
private String name;
private String hobby;
private int age;

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getHobby() {
    return hobby;
}

public void setHobby(String hobby) {
    this.hobby = hobby;
}

public int getAge() {
    return age;
}

public void setAge(int age) {
    this.age = age;
}
 

}
@RequestMapping(value = "/test", method = RequestMethod.POST)
public String test(Student student) {
System.out.println(student.getName());
return "/test1";
}
2.multipart/form-data

當post表單中有type=file控件時content-type會使用此編碼方式.

表單提交:

 <form action="/test" method="post" enctype="multipart/form-data">
<input type="text" name="name" value="zhangsan"> 
<input type="text" name="age" value="12"> 
<input type="text" name="hobby" value="football">
<input type="file" name="file1"
  </form>

後臺:

@RequestMapping(value = "/test", method = RequestMethod.POST)
public String test(Student student,@RequestParam(value = "file1", required = false) MultipartFile file1) {
System.out.println(student.getName());
return "/test1";
}
3.application/json

隨著json規範的流行,以及前後端分離趨勢所致,該編碼方式被越來越多人接受.
前後端分離後,前端通常以json格式傳遞參數,因此該編碼方式較適合RestfulApi接口.

前端傳參:

$.ajax({
url: ‘/test‘,
type: ‘POST‘,
data: {
"name": "zhangsan",
"age": 12,
"hobby": "football"
},
dataType: "json",
success: function (date) {

                }
            })

後臺:

@RequestMapping(value = "/test", method = RequestMethod.POST)
public String test(@RequestBody Student student) {
System.out.println(student.getName());
return "/test1";
}
4.text/xml

XML-RPC（XML Remote Procedure Call）。它是一種使用 HTTP 作為傳輸協議，XML 作為編碼方式的遠程調用規範。

soapUI等xml-rpc請求的參數格式.

提交參數:

     <arg0>
        <name>zhangsan</name>
        <age>12</age>
        <hobby>footbal</hobby>
     </arg0>

分類: java

POST不同提交方式對應的Content-Type,及java服務器接收參數方式