請(qǐng)求方式

get

用RequestMapping

@RequestMapping("/hello") // 默認(rèn)為get方式，或者可以寫成@RequestMapping(value="/hello", method.RequestMethod.GET) public String say() {return "hello"; }

用GetMapping

@GetMapping("/hello1") public String say1() {return "hello"; }

有參方法
請(qǐng)求時(shí)在瀏覽器中輸入: localhost:8080/hello?name=zhangsan&age=18
這個(gè)實(shí)體類里應(yīng)有g(shù)et set方法，要不返回為空

@RequestMapping("/hello2") public String say2(Person person) {return person.toString(); }public class Person {private String name;private int age;public String getName() {return name;}public int getAge() {return age;}public void setName(String name) {this.name = name;}public void setAge(int age) {this.age = age;}public String toString() {return "name:" + name + ";age:" + age;} }

請(qǐng)求時(shí)在瀏覽器中輸入: localhost:8080/hello3/77?name=zhangsan&age=18

@RequestMapping("/hello3/{id}") public String say3(@PathVariable(value="id") Integer id,@RequestParam(value="name") String name,@RequestParam(value="age", required=false, defaultValue="1000") String age){return "id: " + id + ", name: " + name + ", age: " + age; }

post

用RequestMapping

@RequestMapping("/hello4", method=RequestMethod.POST) public String say4() {return "hello 4"; }

用PostMapping

@PostMapping("/hello5") public String say5() {return "hello 5"; }

有參方法，模擬post請(qǐng)求需要下載postman等插件進(jìn)行模擬
與get區(qū)別在于應(yīng)在實(shí)體類上加@RequestBody注解，原因未知

@PostMapping("/hello6") public String say6(@RequestBody Person person) {System.out.println(person.toString());return person.toString(); }

post發(fā)送請(qǐng)求用x-www-form-urlencoded格式可以傳遞參數(shù)，用form-data只會(huì)有默認(rèn)值，具體區(qū)別請(qǐng)參考 https://blog.csdn.net/u013827143/article/details/86222486

@PostMapping("/hello7") public String say7(@RequestParam(value="name") String name,@RequestParam(value="age") String age) {String result = "name: " + name + ", age:" + age;System.out.println(result);return result; }

http請(qǐng)求格式

請(qǐng)求部分請(qǐng)求內(nèi)容

狀態(tài)行（請(qǐng)求方法+請(qǐng)求協(xié)議）	GET /test.html HTTP/1.1
請(qǐng)求頭	Accept: image/gif
請(qǐng)求體

POST提交數(shù)據(jù)方式區(qū)別

application/x-www-form-urlencoded
multipart/form-data
application/json
text/xml

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