SpringBoot2 学习10 Controller接收参数的方式

地址传值

@PathVariable

获取路径参数。即url/{id}这种形式。

? 传值

@RequestParam

获取查询参数。即url?name=这种形式

用注解@RequestParam绑定请求参数到方法入参

当请求参数username不存在时会有异常发生,可以通过设置属性required=false解决,例如: @RequestParam(value=“username”, required=false)

Body参数

//application/jason

@PostMapping(path = “/demo1”)

public void demo1(@RequestBody Person person) {

无注解（form提交）

//form-data

@PostMapping(path = “/demo1”)

public void demo1(Person person) {

请求头参数以及Cookie

@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());

//请求头参数以及Cookie

@RequestMapping("request5")

public String test5(@RequestHeader(name ="Header") String Header,

@CookieValue(name ="cookie1") String cookie1,

@CookieValue(name ="cookie2") String cookie2){

return "Header:"+Header+"cookie1:"+cookie1+"cookie2"+cookie2;

}

//Cookie

@GetMapping("/ee")

public String ee(@RequestHeader(name="myHeader") String myHeader,@CookieValue(name="myCookie") String myCookie){

System.out.println("myHeader=" + myHeader);

System.out.println("myCookie=" + myCookie);

return "---------"+myHeader+"============="+myCookie;

}

表单的参数写在Controller相应的方法的形参中

适用于get方式提交，不适用于post方式提交。

/**

* 1.直接把表单的参数写在Controller相应的方法的形参中

* @param username

* @param password

* @return

@RequestMapping("/addUser1")

public String addUser1(String username,String password) {

System.out.println(“username is:”+username);

@ModelAttribute注解获取POST请求的FORM表单数据

/**

* 使用@ModelAttribute注解获取POST请求的FORM表单数据

* @param user

* @return

@RequestMapping(value="/addUser5",method=RequestMethod.POST)

public String addUser5(@ModelAttribute(“user”) UserModel user) {

System.out.println(“username is:”+user.getUsername());

System.out.println(“password is:”+user.getPassword());

return “demo/index”;

测试代码

Controller

package com.zz.controller;

import java.util.HashMap;

import java.util.Map;

import com.zz.entity.User;

import org.springframework.web.bind.annotation.*;

@RestController

@RequestMapping("test")

public class TestController {

//路径传值

@RequestMapping("t1/{p1}")

public Map t1(@PathVariable("p1") String paramter1){

Map map=new HashMap();

map.put("rs",paramter1);

return map;

}

//? 传值

@RequestMapping("t2")

public Map t2(@RequestParam("p1") String paramter1)

{

System.out.println(paramter1);

Map map=new HashMap();

map.put("rs",paramter1);

return map;

}

//Body参数

//application/jason

@RequestMapping("t3")

public Map t3(@RequestBody User person){

Map map=new HashMap();

map.put("rs",person.getName());

return map;

}

// 无注解（form提交）

//form-data

@RequestMapping("t4")

public Map t4(User person){

Map map=new HashMap();

map.put("rs",person.getName());

return map;

}

// 请求头参数以及Cookie

@RequestMapping("t5")

public Map t5(@RequestHeader(name ="myHeader") String myHeader,

@CookieValue(name = "myCookie") String myCookie){

System.out.println("myHeader=" + myHeader);

System.out.println("myCookie=" + myCookie);

Map map=new HashMap();

map.put("rs",myHeader);

return map;

}

// 表单的参数写在Controller相应的方法的形参中

// 适用于get方式提交，不适用于post方式提交。

@RequestMapping("t6")

public Map t6(String name,String pwd){

Map map=new HashMap();

map.put("rs",name);

return map;

}

HTML

Bootstrap 实例

测试

SpringBoot Form post 提交跳转失败解决办法

报错日志：tSupportedException: Request method ‘POST’ not supported

解决：post controller方法里面通过 return “redirect:/index/toIndex”; 执行get的跳转controller

package com.zz.controller;/**

* @Description: 描述

* @Author: Bsea

* @CreateDate: ${Date}

import com.zz.config.DataValidationException;

import com.zz.entity.Member;

import com.zz.form.MemberForm;

import com.zz.service.MemberService;

import com.zz.util.FormUtil;

import com.zz.util.ResultVOUtil;

import com.zz.vo.ResultVO;

import io.swagger.annotations.Api;

import io.swagger.annotations.ApiImplicitParam;

import io.swagger.annotations.ApiImplicitParams;

import io.swagger.annotations.ApiOperation;

import org.springframework.beans.BeanUtils;

import org.springframework.data.domain.Page;

import org.springframework.stereotype.Controller;

import org.springframework.validation.BindingResult;

import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;

import javax.validation.Valid;

/**

* @Description: java类作用描述

* @Author: Bsea

* @CreateDate: 2019/10/16$ 21:27$

@Api(value = "会员控制器")

@Controller

@RequestMapping("index")

public class IndexController {

@Resource

MemberService memberService;

@ApiOperation(value = "添加会员", notes = "根据名字查找会员")

@ApiImplicitParam(name = "name", value = "会员名字", required = true, dataType = "String",paramType = "path")

@PostMapping("add")

public String add(@Valid MemberForm member, BindingResult bindingResult){

System.out.println(member);

if(bindingResult.hasErrors()){

throw new DataValidationException("验证错误");

}

Member member1=new Member();

BeanUtils.copyProperties(member,member1);

if(memberService.add(member1)!=null){

return "redirect:/index/toIndex";

}else{

return "redirect:/index/toIndex";

}

@RequestMapping("toIndex")

public String toIndex(){

return "/index2.html";

}

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原文链接：https://blog.csdn.net/h356363/article/details/90510609

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