Springboot 请求数据

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 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请求格式

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