springboot提交及接收参数

package com.example.demo.controller;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import com.example.demo.pojo.Student;

@Controller
public class ResponseController {

   // 仅响应跳转
   @RequestMapping("/m1")
   public @ResponseBody String m1() {
       System.out.println(1);
       return "m1";
   }

   // 接收普通参数
   @RequestMapping("/m2")
   public @ResponseBody String m2(HttpServletRequest request) {
       String username = request.getParameter("username");
       String password = request.getParameter("password");
       String hdn = request.getParameter("hdn");
       System.out.println(username + password + hdn);
       return "m2";
   }

   // 接收普通路徑参数2
   @RequestMapping("/m22/{id}")
//       @GetMapping("/demo/{id}")
//       @PostMapping("/demo/{id}")
   public @ResponseBody String m22(@PathVariable(name = "id") String id, @RequestParam(name="id") String name) {
       System.out.println("id:" + id);
       System.out.println("name:" + name);

return "m2";
}

   // 接收map封裝参数
   @RequestMapping(value = "/m3", produces = "text/html;charset=UTF-8")
   public @ResponseBody String m3(@RequestParam Map<String, Object> map, HttpServletRequest request) {

       System.out.println(map.get("name"));
       String[] likes = request.getParameterValues("likes");
       Map<String, String[]> map2 = request.getParameterMap();
       System.out.println(likes);

return "m3";
}

   // 接收对象封装参数
   @RequestMapping("/m4")
   public @ResponseBody String m4(Student student) {

       System.out.println(student.getId());
       System.out.println(student.getName());
       System.out.println(student.getWeight());
       System.out.println(student.isMale());

// 单独取
System.out.println(student.getLikes().get(0));

       // 循环取
       for (String like : student.getLikes()) {
           System.out.println(like);
       }

       // Lambda方式循环取
       student.getLikes().forEach(x -> System.out.println(x));
       return "m4";
   }

}
以下为常见表单元素形式的各种提交：

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
function loadXMLDoc()
{
   var xmlhttp;
   if (window.XMLHttpRequest)
   {
       // IE7+, Firefox, Chrome, Opera, Safari 浏览器执行代码
       xmlhttp=new XMLHttpRequest();
   }
   else
   {
       // IE6, IE5 浏览器执行代码
       xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
   }
   xmlhttp.onreadystatechange=function()
   {
       if (xmlhttp.readyState==4 && xmlhttp.status==200)
       {
           alert(xmlhttp.responseText);
       }
   }
   xmlhttp.open("GET","m1",true);
   xmlhttp.send();
}
</script>

</head>
<body>
h1

<a href="m1">m1</a>

<form action="m22/15" method="post">
<input type="text" name="id"/><br>
<input type="password" name="name"/><br>
<input type="hidden" name="weight" value="185.5"/><br>
男：<input type="radio" name="male" value="1"/>女：<input type="radio" name="male" value="0"/><br>
足球：<input type="checkbox" name="likes" value="football"/>
篮球：<input type="checkbox" name="likes" value="basketball"/>
排球：<input type="checkbox" name="likes" value="volleyball"/><br>
<input type="submit"/>
</form>
<br>
<input type="button" οnclick="loadXMLDoc()" value="ajax"/>
</body>
</html>

实体类之常用属性：

package com.example.demo.pojo;

import java.util.List;

public class Student {

   private int id;
   private String name;
   private float weight;
   private boolean male;

   private List<String> likes;

   public List<String> getLikes() {
       return likes;
   }
   public void setLikes(List<String> likes) {
       this.likes = likes;
   }

   public int getId() {
       return id;
   }
   public void setId(int id) {
       this.id = id;
   }
   public String getName() {
       return name;
   }
   public void setName(String name) {
       this.name = name;
   }
   public float getWeight() {
       return weight;
   }
   public void setWeight(float weight) {
       this.weight = weight;
   }
   public boolean isMale() {
       return male;
   }
   public void setMale(boolean male) {
       this.male = male;
   }
}

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