springboot服务端获取前端传递的参数

1、直接把参数写在Controller相应的方法的形参中

    @RequestMapping("a")
    public void tta(String name,String password) {

        String tName = name;
        String tPassword= password;

        System.out.println("形参测试:"+tName+"，"+tPassword);

    }

调用接口传参: http://localhost:8080/a?name=123&password=456

2、使用HttpServletRequest接收参数

    @RequestMapping("b")
    public void ttb(HttpServletRequest httpServletRequest) {

        String tName = httpServletRequest.getParameter("name");
        String tPassword= httpServletRequest.getParameter("password");;

        System.out.println("HttpServletRequest测试"+tName+"，"+tPassword);

    }

调用接口传参: http://localhost:8080/b?name=456&password=789

3、使用bean来接收参数

建一个bean类对应接收的参数

package com.example.demo;

public class User {

    String name;
    String password;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

调用bean接收参数

    @RequestMapping(value = "c")
    public void ttc(User user) {

        String tName = user.getName();
        String tPassword= user.getPassword();

        System.out.println("bean测试"+tName+"，"+tPassword);

    }

调用接口传参：

4、通过@PathVariable获取参数

这种传参方式是以路径的方式传参

    @RequestMapping(value = "d/{name}/{password}")
    public void ttd(@PathVariable String name, @PathVariable String password) {

        String tName = name;
        String tPassword= password;

        System.out.println("@PathVariable测试"+tName+"，"+tPassword);

    }

调用接口传参: http://localhost:8080/d/2/3

5、使用@ModelAttribute注解获取参

    @RequestMapping(value = "e")
    public void tte(@ModelAttribute User user) {

        String tName = user.getName();
        String tPassword= user.getPassword();

        System.out.println("@ModelAttribute测试"+tName+"，"+tPassword);

    }

调用接口传参

6、用注解@RequestParam绑定请求参数到方法入参

这种方式默认是required = true,必须传对应的参数，不然会报错，可以改成required = false

    @RequestMapping(value = "f")
    public void ttf(@RequestParam(required = true) String name, @RequestParam String password) {

        String tName = name;
        String tPassword = password;

        System.out.println("@RequestParam测试" + tName + "，" + tPassword);

    }

调用接口传参：

7、使用@RequestBody获取参数

这种方式主要用于接收json数据类型

    @RequestMapping(value = "g")
    public void ttg(@RequestBody User user) {

        String tName = user.getName();
        String tPassword= user.getPassword();

        System.out.println("@RequestBody测试" + tName + "，" + tPassword);

    }

调用接口传参