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小編給大家分享一下java中Spring接收web請求參數(shù)的方式有哪些,相信大部分人都還不怎么了解,因此分享這篇文章給大家參考一下,希望大家閱讀完這篇文章后大有收獲,下面讓我們一起去了解一下吧!

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1 查詢參數(shù)
請求格式:url?參數(shù)1=值1&參數(shù)2=值2...
同時適用于GET和POST方式
spring處理查詢參數(shù)的方法又有幾種寫法:
方法一:
方法參數(shù)名即為請求參數(shù)名
// 查詢參數(shù)1
@RequestMapping(value = "/test/query1", method = RequestMethod.GET)
public String testQuery1(String username, String password) {
System.out.println("username=" + username + ", password=" + password);
return "username=" + username + ", password=" + password;
}方法二:
從HttpServletRequest中提取參數(shù)
// 查詢參數(shù)2
@RequestMapping(value = "/test/query2", method = RequestMethod.GET)
public String testQuery2(HttpServletRequest request) {
String username = request.getParameter("username");
String password = request.getParameter("password");
System.out.println("username=" + username + ", password=" + password);
return "username=" + username + ", password=" + password;
}方法三:
方法參數(shù)名和請求參數(shù)名可以不一樣,通過@RequestParam注解來綁定參數(shù)
// 查詢參數(shù)3
@RequestMapping(value = "/test/query3", method = RequestMethod.GET)
public String testQuery3(@RequestParam("username") String un, @RequestParam("password") String pw) {
System.out.println("username=" + un + ", password=" + pw);
return "username=" + un + ", password=" + pw;
}方法四:
創(chuàng)建一個實體類對象作為參數(shù)承載體,spring會根據(jù)參數(shù)名稱自動將參數(shù)綁定到實體類對象的屬性上
// 查詢參數(shù)4
@RequestMapping(value = "/test/query4", method = RequestMethod.GET)
public String testQuery4(User user) {
String username = user.getUsername();
String password = user.getPassword();
System.out.println("username=" + username + ", password=" + password);
return "username=" + username + ", password=" + password;
}實體類定義如下:
@Data
@NoArgsConstructor
@AllArgsConstructor
@Builderpublic class User {
private String username;
private String password;
}這里用到了第三方庫lombok,這樣就不需要在代碼中手動添加get、set等方法,lombok會自動添加。
發(fā)送請求的curl命令如下:
curl -i 'http://192.168.1.14:8080/test/query1?username=aaa&password=bbb'
交互報文如下:
GET /test/query1?username=aaa&password=bbb HTTP/1.1 Host: 192.168.1.14:8080 User-Agent: curl/7.58.0 Accept: */*HTTP/1.1 200 Content-Type: text/plain;charset=UTF-8 Content-Length: 26 Date: Thu, 25 Oct 2018 07:01:30 GMT username=aaa, password=bbb
2 表單參數(shù)
請求參數(shù)不在url中,而是在Body體中,格式為:url?參數(shù)1=值1&參數(shù)2=值2...
適用于POST方式
表單參數(shù)處理方法和前面的請求參數(shù)處理方法幾乎完全一樣,只是RequestMethod注解中將method方法設(shè)置成POST方法
方法一:
// 表單參數(shù)1
@RequestMapping(value = "/test/form1", method = RequestMethod.POST)
public String testForm1(String username, String password) {
System.out.println("username=" + username + ", password=" + password);
return "username=" + username + ", password=" + password;
}方法二:
// 表單參數(shù)2
@RequestMapping(value = "/test/form2", method = RequestMethod.POST)
public String testForm2(HttpServletRequest request) {
String username = request.getParameter("username");
String password = request.getParameter("password");
System.out.println("username=" + username + ", password=" + password);
return "username=" + username + ", password=" + password;
}方法三:
// 表單參數(shù)3
@RequestMapping(value = "/test/form3", method = RequestMethod.POST)
public String testForm3(@RequestParam("username") String un, @RequestParam("password") String pw) {
System.out.println("username=" + un + ", password=" + pw);
return "username=" + un + ", password=" + pw;
}方法四:
// 表單參數(shù)4
@RequestMapping(value = "/test/form4", method = RequestMethod.POST)
public String testForm4(User user) {
String username = user.getUsername();
String password = user.getPassword();
System.out.println("username=" + username + ", password=" + password);
return "username=" + username + ", password=" + password;
}curl請求命令如下:
curl -X POST -i -d "username=aaa&password=bbb" http://192.168.1.14:8080/test/form1
請求和響應(yīng)報文如下:
POST /test/form1 HTTP/1.1 Host: 192.168.1.14:8080 User-Agent: curl/7.58.0 Accept: */* Content-Length: 25 Content-Type: application/x-www-form-urlencoded username=aaa&password=bbbHTTP/1.1 200 Content-Type: text/plain;charset=UTF-8 Content-Length: 26 Date: Thu, 25 Oct 2018 07:05:35 GMT username=aaa, password=bbb
3 路徑參數(shù)
請求參數(shù)為url中的一部分,格式為:url/參數(shù)1/參數(shù)2...
同時適用于GET和POST方式
代碼如下:
@RequestMapping(value = "/test/url/{username}/{password}", method = RequestMethod.GET)
public String testUrl(@PathVariable String username, @PathVariable String password) {
System.out.println("username=" + username + ", password=" + password);
return "username=" + username + ", password=" + password;
}請求curl命令如下:
curl -i http://192.168.1.14:8080/test/url/aaa/bbb
請求和響應(yīng)報文如下:
GET /test/url/aaa/bbb HTTP/1.1 Host: 192.168.1.14:8080 User-Agent: curl/7.58.0 Accept: */*HTTP/1.1 200 Content-Type: text/plain;charset=UTF-8 Content-Length: 26 Date: Thu, 25 Oct 2018 07:07:44 GMT username=aaa, password=bbb
4 json格式參數(shù)
請求參數(shù)在Body體中,并且為json格式。需要添加請求頭:Content-Type: application/json;charset=UTF-8
適用于POST方式
方法一:
定義實體類,將json對象解析成實力類,需要添加RequestBody注解
// json參數(shù)1
@RequestMapping(value = "/test/json1", method = RequestMethod.POST)
public String testJson1(@RequestBody User user) {
String username = user.getUsername();
String password = user.getPassword();
System.out.println("username=" + username + ", password=" + password);
return "username=" + username + ", password=" + password;
}方法二:
如果不像定義實體類,也可以將json請求直接解析成JSONObject類
// json參數(shù)2
@RequestMapping(value = "/test/json2", method = RequestMethod.POST)
public String testJson2(@RequestBody JSONObject json) {
String username = json.getString("username");
String password = json.getString("password");
System.out.println("username=" + username + ", password=" + password);
return "username=" + username + ", password=" + password;
}方法三:
也可以將json對象直接解析成Map對象
// json參數(shù)3 @RequestMapping(value = "/test/json3", method = RequestMethod.POST) public String testJson3(@RequestBody MapuserMap) { String username = userMap.get("username"); String password = userMap.get("password"); System.out.println("username=" + username + ", password=" + password); return "username=" + username + ", password=" + password; }
請求curl命令如下:
curl -X POST -i -H 'Content-Type: application/json;charset=UTF-8' -d '{
"username" : "aaa",
"password" : "bbb"
}
'http://192.168.1.14:8080/test/json1請求和響應(yīng)報文如下:
POST /test/json1 HTTP/1.1
Host: 192.168.1.14:8080
User-Agent: curl/7.58.0
Accept: */*
Content-Type: application/json;charset=UTF-8
Content-Length: 52
{
"username" : "aaa",
"password" : "bbb"
}HTTP/1.1 200
Content-Type: text/plain;charset=UTF-8
Content-Length: 26
Date: Thu, 25 Oct 2018 07:09:06 GMT
username=aaa, password=bbb以上是java中Spring接收web請求參數(shù)的方式有哪些的所有內(nèi)容,感謝各位的閱讀!相信大家都有了一定的了解,希望分享的內(nèi)容對大家有所幫助,如果還想學(xué)習(xí)更多知識,歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道!
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