在用HttpUrlConnection請求極光推送restful時(http://docs.jiguang.cn/jpush/server/old/rest_api_v2_push/),java
涉及到一個參數序列化問題,對方要求web
HTTP Post 的Content-Type 需採用 application/x-www-form-urlencodedspring
而後序列化時用了json(Map.tostring)致使對方的服務器沒有接收到參數,因而改爲 後者,json
代碼參數作了調整segmentfault
private static String json2String(JSONObject json) throws UnsupportedEncodingException { Iterator<String> sIterator = json.keys(); String urlpara = ""; while (sIterator.hasNext()) { String key = sIterator.next(); //根據鍵得到值,值也能夠是JSONObject,JSONArray,使用對應的參數接收便可 String value = json.getString(key); urlpara += key + "=" + URLEncoder.encode(value, "UTF-8") + "&"; } return urlpara; }
doneapi
(一)緩存
參考:http://blog.csdn.net/mygoon/article/details/48546781bash
package wzq.j2se;服務器
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;restful
public class HttpURLConnectionPost {
/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
readContentFromPost();
}
public static void readContentFromPost() throws IOException {
// Post請求的url,與get不一樣的是不須要帶參數
URL postUrl = new URL("http://www.wangzhiqiang87.cn");
// 打開鏈接
HttpURLConnection connection = (HttpURLConnection) postUrl.openConnection();
// 設置是否向connection輸出,由於這個是post請求,參數要放在
// http正文內,所以須要設爲true
connection.setDoOutput(true);
// Read from the connection. Default is true.
connection.setDoInput(true);
// 默認是 GET方式
connection.setRequestMethod("POST");
// Post 請求不能使用緩存
connection.setUseCaches(false);
connection.setInstanceFollowRedirects(true);
// 配置本次鏈接的Content-type,配置爲application/x-www-form-urlencoded的
// 意思是正文是urlencoded編碼過的form參數,下面咱們能夠看到咱們對正文內容使用URLEncoder.encode
// 進行編碼
connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
// 鏈接,從postUrl.openConnection()至此的配置必需要在connect以前完成,
// 要注意的是connection.getOutputStream會隱含的進行connect。
connection.connect();
DataOutputStream out = new DataOutputStream(connection
.getOutputStream());
// The URL-encoded contend
// 正文,正文內容其實跟get的URL中 '? '後的參數字符串一致
String content = "account=" + URLEncoder.encode("一個大肥人", "UTF-8");
content +="&pswd="+URLEncoder.encode("兩個個大肥人", "UTF-8");;
// DataOutputStream.writeBytes將字符串中的16位的unicode字符以8位的字符形式寫到流裏面
out.writeBytes(content);
out.flush();
out.close();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while ((line = reader.readLine()) != null){
System.out.println(line);
}
reader.close();
connection.disconnect();
}
}
在接收端,這樣獲取參數:
String name = request.getParameter("account");
String pswd = request.getParameter("pswd");
System.out.println(new String(name.getBytes("iso-8859-1"),"UTF-8"));
System.out.println(new String(pswd.getBytes("iso-8859-1"),"UTF-8"));
(二)
https://segmentfault.com/a/1190000007252829
curl -X POST 'http://localhost:8080/formPost' -d 'id=1&name=foo&mobile=13612345678'
//org.springframework.web.method.annotation.RequestParamMethodArgumentResolver#resolveName
if (arg == null) {
String[] paramValues = webRequest.getParameterValues(name);
if (paramValues != null) {
arg = paramValues.length == 1 ? paramValues[0] : paramValues;
}
}
curl -X POST -H "Content-Type: application/json" 'http://localhost:8080/jsonPost' -d '{"id":2,"name":"foo","mobile":"13656635451"}'
//com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter#readInternal
protected Object readInternal(Class<? extends Object> clazz, HttpInputMessage inputMessage) throws IOException, HttpMessageNotReadableException {
ByteArrayOutputStream baos = new ByteArrayOutputStream(); InputStream in = inputMessage.getBody();
byte[] buf = new byte[1024];
while(true) {
int bytes = in.read(buf); if(bytes == -1) {
byte[] bytes1 = baos.toByteArray(); return JSON.parseObject(bytes1, 0, bytes1.length, this.charset.newDecoder(), clazz, new Feature[0]);
}
if(bytes > 0) {
baos.write(buf, 0, bytes); }
}
}
web層代碼
@RequestMapping(value="/mixPost", method=RequestMethod.POST )
public Result<Void> mixPostTest(@RequestBody @Valid Foo foo, @RequestParam Integer sex)
提交請求
curl -X POST -H "Content-Type: application/json" 'http://localhost:8080/mixPost?sex=1' -d '{"id":2,"name":"foo","mobile":"13656635451"}'
@RequestMapping(value="/formPost", method=RequestMethod.POST )
public Result<Void> formPostTest(@RequestParam int id, @RequestParam String name, @RequestParam String mobile)
由於id是必填參數 若是請求參數中不含id的話 會報錯 以下所示
org.springframework.web.bind.MissingServletRequestParameterException: Required int parameter 'id' is not present
at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.handleMissingValue(RequestParamMethodArgumentResolver.java:255)
at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:95)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:79)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:157)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:124)
經過此方法能夠快速定位到源碼
@RequestMapping(value="/jsonPost", method=RequestMethod.POST )
public Result<Void> jsonPostTest(@RequestBody @Valid Foo foo)
由於確定要先構造一個空Foo對象 而後才能注入各屬性值 因此在Foo的無參構造函數中加斷點, 能夠定位到json請求解析參數的源碼