說明：
通常get請求獲取的參數(shù)是在url后面，而post請求獲取的是請求體當(dāng)中的參數(shù)。因此兩者在請求方式上會有所不同?！ ?/p>
1.直接將接受的參數(shù)寫在controller對應(yīng)方法的形參當(dāng)中（適用于get提交方式）
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/** * 1.直接把表單的參數(shù)寫在Controller相應(yīng)的方法的形參中 * * @param username * @param password * @return */ @GetMapping("/addUser1") public String addUser1(String username, String password) { System.out.println ("username is:" + username); System.out.println ("password is:" + password); return username + "," + password; } |
2.通過url請求路徑獲取參數(shù)
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/** * 2、通過@PathVariable獲取路徑中的參數(shù) * * @param username * @param password * @return */ @RequestMapping(value = "/addUser4/{username}/{password}", method = RequestMethod.GET) public String addUser4(@PathVariable String username, @PathVariable String password) { System.out.println ("username is:" + username); System.out.println ("password is:" + password); return "addUser4"; } |
3.通過request請求對象來接受發(fā)來的參數(shù)信息（Get請求方式或者時Post請求方式都可以）
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/** * 3、通過HttpServletRequest接收 * * @param request * @return */ @RequestMapping("/addUser2") public String addUser2(HttpServletRequest request) { String username = request.getParameter ("username"); String password = request.getParameter ("password"); System.out.println ("username is:" + username); System.out.println ("password is:" + password); return "demo/index"; } |
4.封裝JavaBean對象的方式來接受請求參數(shù)（get方式與post方式都可以）
4.1首先在模塊當(dāng)中創(chuàng)建對應(yīng)的JavaBean,并提供相應(yīng)的get,set方法。
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package com.example.demo.pojo;import lombok.Data;@Datapublic class User1 { private String username; private String password;} |
4.2Controller層
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/** * 4、通過一個bean來接收 * * @param user * @return */ @RequestMapping("/addUser3") public String addUser3(User1 user) { System.out.println ("username is:" + user.getUsername ( )); System.out.println ("password is:" + user.getPassword ( )); return "/addUser3"; } |
5.使用注解@RequestParam注解將請求參數(shù)綁定到Controller層對應(yīng)方法的形參當(dāng)中
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/** * 5、用注解@RequestParam綁定請求參數(shù)到方法入?yún)?/code> * @param username * @param password * @return */ @RequestMapping(value="/addUser6",method=RequestMethod.GET) public String addUser6(@RequestParam("username") String username,@RequestParam("password") String password) { System.out.println("username is:"+username); System.out.println("password is:"+password); return "demo/index"; } |
下面介紹，發(fā)送json格式的請求，接受數(shù)據(jù)的情況：
1.將json請求的key,value值封裝到實(shí)體對象的屬性當(dāng)中（通常將參數(shù)放在請求體body中，以application/json格式被后端獲?。?/p>
1.1創(chuàng)建一個實(shí)體類
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public class User2 implements Serializable { private static final long serialVersionUID = 1L; @JsonProperty(value = "id") private Integer id; @JsonProperty(value = "name") private String name; @JsonProperty(value = "age") private Integer age; @JsonProperty(value = "hobby") private List<String> hobby; |
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/** *將json請求的key,value封裝到實(shí)體對象當(dāng)中。 * @param user * @return */ @PostMapping("/save") public String saveUser(@RequestBody User2 user) {// list.add(user);// User2 user2 = new User2 ( );// user2.setId (user.getId ());// user2.setAge (user.getAge ());// user2.setName (user.getName ());// user2.setHobby (user.getHobby ()); return "success"+user; } |
2.將json請求的key，value值封裝到request對象的屬性當(dāng)中（通常請求參數(shù)放body中，將content-type改為x-www-form-urlencoded）
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/** * 將請求參數(shù)封裝到request對象當(dāng)中。 * @param request * @return */ @PostMapping("/save2") public User2 save(HttpServletRequest request) { Integer id = Integer.parseInt(request.getParameter("id")); String name = request.getParameter("name"); Integer age = Integer.parseInt(request.getParameter("age")); String parameter = request.getParameter("hobby"); List<String> stringList = new ArrayList<> ( ); String[] split = parameter.split (","); for (int i = split.length - 1; i >= 0; i--) { stringList.add (split[i]); } User2 user2 = new User2(id, name, age, stringList);// list.add(user); return user2; } |
3.通過http協(xié)議，將json參數(shù)轉(zhuǎn)成JSONOBject對象
3.1Controller層接受JSON參數(shù)
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/** * 通過http協(xié)議將參數(shù)轉(zhuǎn)為jsonobject * @param request * @return * @throws IOException * @throws JSONException */ @PostMapping("/save3") public User2 save3(HttpServletRequest request) throws IOException, JSONException { JSONObject jsonObject = handlerData(request); Integer id = jsonObject.getInteger("id"); String name = jsonObject.getString("name"); Integer age = jsonObject.getInteger("age"); List<String> hobby = jsonObject.getObject("hobby", List.class); User2 user3 = new User2 (id, name, age, hobby);// list.add(user); return user3; } |
3.2通過以下方法將Json字符串轉(zhuǎn)成Jsonobject對象
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//這里使用的是alibaba的json工具類 public static JSONObject handlerData(HttpServletRequest request) throws IOException, JSONException { StringBuffer sb = new StringBuffer(); InputStream is = request.getInputStream(); BufferedReader br = new BufferedReader(new InputStreamReader (is, "utf-8")); String s = ""; while ((s = br.readLine()) != null) { sb.append(s); } if (sb.toString().length() <= 0) { return null; } else { return JSONObject.parseObject(sb.toString()); } } |
4.將json格式的請求參數(shù)封裝到hashmap的key,value鍵-值對當(dāng)中。（json字符串串放在body中，請求格式為application/json格式）
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/** *將json請求的Key,value封裝到map的key,value當(dāng)中去。 * @param map * @return */ @PostMapping("/save1") public User2 saveUser1(@RequestBody Map<String, Object> map) { Integer id = (Integer) map.get("id"); String name = (String) map.get("name"); Integer age = (Integer) map.get("age"); List<String> hobby=(List<String>) map.get("hobby"); User2 user = new User2(id, name, age, hobby);// list.add(user); return user; } |
該文檔主要是學(xué)習(xí)以下兩篇文檔的總結(jié)：
https://www.cnblogs.com/lirenhe/p/10737673.html
https://blog.csdn.net/zyxwvuuvwxyz/article/details/80352712
到此這篇關(guān)于SpringMvc接受請求參數(shù)的幾種情況演示的文章就介紹到這了,更多相關(guān)SpringMvc請求參數(shù)內(nèi)容請搜索服務(wù)器之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持服務(wù)器之家！
原文鏈接：https://www.cnblogs.com/wangjie-logs/p/15054136.html
