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Springboot接收前台参数几种形式总计
第一类：请求路径参数
1、@PathVariable
获取路径参数。即url/{id}这种形式。
2、@RequestParam
获取查询参数。即url?name=这种形式
例子
GET
http://localhost:8080/demo/123?name=suki_rong
对应的java代码：
-
@GetMapping("/demo/{id}")
-
public void demo(
@PathVariable(name = "id") String id,
@RequestParam(name = "name") String name) {
-
System.
out.println(
"id="+id);
-
System.
out.println(
"name="+name);
-
}
输出结果：
id=123
name=suki_rong
第二类：Body参数
因为是POST请求，这里用Postman的截图结合代码说明
1、@RequestBody
例子
对应的java代码：
-
@
PostMapping(
path =
"/demo1")
-
public void demo1(@RequestBody Person person) {
-
System
.out
.println(
person
.toString());
-
}
输出结果：
name:suki_rong;age=18;hobby:programing
也可以是这样
-
@PostMapping(path = "/demo1")
-
public void demo1(
@RequestBody Map<String, String> person) {
-
System.
out.println(person.
get(
"name"));
-
}
输出结果：
suki_rong
2、无注解
例子
对应的java代码：
-
@
PostMapping(
path =
"/demo2")
-
public void demo2(Person person) {
-
System
.out
.println(
person
.toString());
-
}
输出结果：
name:suki_rong;age=18;hobby:programing
Person类
-
public
class Person {
-
-
private
long id;
-
private String name;
-
private
int age;
-
private String hobby;
-
-
@Override
-
public String toString(){
-
return
"name:"+name+
";age="+age+
";hobby:"+hobby;
-
}
-
-
// getters and setters
-
}
第三类：请求头参数以及Cookie
1、@RequestHeader
2、@CookieValue
例子
java代码：
-
@GetMapping("/demo3")
-
public void demo3(
@RequestHeader(name = "myHeader") String myHeader,
-
@CookieValue(name = "myCookie") String myCookie) {
-
System.
out.println(
"myHeader=" + myHeader);
-
System.
out.println(
"myCookie=" + myCookie);
-
}
也可以这样
-
@GetMapping(
"/demo3")
-
public void demo3(HttpServletRequest request) {
-
System.
out.println(request.getHeader(
"myHeader"));
-
for (Cookie cookie : request.getCookies()) {
-
if (
"myCookie".
equals(cookie.getName())) {
-
System.
out.println(cookie.getValue());
-
}
-
}
-
}
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