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请求方式

get

1. 用RequestMapping

@RequestMapping("/hello") // 默认为get方式，或者可以写成@RequestMapping(value="/hello", method.RequestMethod.GET)public String say() {
   	return "hello";}

2. 用GetMapping

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

3. 有参方法
   请求时在浏览器中输入: localhost:8080/hello?name=zhangsan&age=18
   这个实体类里应有get set方法，要不返回为空

@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;    }}

请求时在浏览器中输入: 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

1. 用RequestMapping

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

2. 用PostMapping

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

3. 有参方法，模拟post请求需要下载postman等插件进行模拟
   与get区别在于应在实体类上加@RequestBody注解，原因未知

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

post发送请求用x-www-form-urlencoded格式可以传递参数，用form-data只会有默认值，具体区别请参考

@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请求格式

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