在Java中使用Get/Post方式发送Http请求
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2022-04-15 17:34:49
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在Java中使用Get/Post方式发送Http请求
RESTfulClient工具类：
package com.fsc.civet.mongo.util;
import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.conn.HttpHostConnectException;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;
public class RESTfulClient {
public static String SERVER_URL = "";
public static String REQUEST_PATH = "";
public static String REQUEST_URL = SERVER_URL + REQUEST_PATH;
public static String GET_CONTENT_TYPE = "application/json";
public static String GET_ACCEPT = "application/json";
public static String GET_CHARSET = "UTF-8";
public static String PUT_CONTENT_TYPE = "text/plain";
public static String PUT_ACCEPT = "application/json";
public static String PUT_CHARSET = "UTF-8";
public static String POST_CONTENT_TYPE = "application/json";
public static String POST_ACCEPT = "application/json";
public static String POST_CHARSET = "UTF-8";
public static String executeGet(String path)
throws HttpHostConnectException, IOException {
String fullPath = SERVER_URL + path;
HttpGet httpQuery = new HttpGet(fullPath);
httpQuery.addHeader("Accept", "text/plain;charset=UTF-8");// );
httpQuery.addHeader("Accept", "application/json");
return doRequest(httpQuery);
}
public static String executePost(String path, String body)
throws IOException {
HttpPost httpQuery = new HttpPost(SERVER_URL + path);
System.out.println("request Path : " + SERVER_URL + path);
httpQuery.addHeader("Content-Type", POST_CONTENT_TYPE);
httpQuery.addHeader("Accept", POST_ACCEPT);
httpQuery.addHeader("charset", POST_CHARSET);
if (null != body) {
StringEntity se = new StringEntity(body);
httpQuery.setEntity(se);
}
return doRequest(httpQuery);
}
public static String executePost1(String path, List<NameValuePair> params) throws IOException {
HttpPost httpQuery = new HttpPost(SERVER_URL + path);
System.out.println("request Path : " + SERVER_URL + path);
httpQuery.addHeader("Content-Type", POST_CONTENT_TYPE);
httpQuery.addHeader("Accept", POST_ACCEPT);
httpQuery.addHeader("charset", POST_CHARSET);
if (null != params) {
httpQuery.setEntity(new UrlEncodedFormEntity(params));
}
return doRequest(httpQuery);
}
public static String executePut(String path, String body)
throws IOException {
HttpPut httpQuery = new HttpPut(SERVER_URL + path);
httpQuery.addHeader("Content-Type", PUT_CONTENT_TYPE);
httpQuery.addHeader("charset", PUT_CHARSET);
if (null != body) {
StringEntity se = new StringEntity(body, PUT_CHARSET);
httpQuery.setEntity(se);
}
return doRequest(httpQuery);
}
public static String executePutTwo(String path, String body)
throws IOException {
HttpPut httpQuery = new HttpPut(SERVER_URL + path);
httpQuery.addHeader("Content-Type", PUT_ACCEPT);
httpQuery.addHeader("charset", PUT_CHARSET);
if (null != body) {
StringEntity se = new StringEntity(body, PUT_CHARSET);
httpQuery.setEntity(se);
}
return doRequest(httpQuery);
}
private static String doRequest(HttpRequestBase httpQuery)
throws ParseException, IOException, HttpHostConnectException {
String content = null;
final HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParams, 10000);
DefaultHttpClient httpClient = new DefaultHttpClient(httpParams);
HttpResponse httpResponse = httpClient.execute(httpQuery);
HttpEntity entity = null;
entity = httpResponse.getEntity();
if (null != entity) {
content = EntityUtils.toString(entity, HTTP.UTF_8);
}
return content;
}
public static String executePostNew(String type, File file, String url, String username) throws Exception {
//new一個MultipartEntityBuilder封裝類的對象，并設定模式及編碼類型
MultipartEntityBuilder mulEnBuilder = MultipartEntityBuilder.create();
mulEnBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
mulEnBuilder.setCharset(Charset.forName("UTF-8"));
//封裝文本內容
mulEnBuilder.addTextBody("username", username, ContentType.create(type, Charset.forName("UTF-8")));
//封裝二進制文件
mulEnBuilder.addBinaryBody("file", file, ContentType.create("application/octet-stream", Charset.forName("UTF-8")), file.getPath());
//new一個HttpEntity封裝類的對象，并將上面的MultipartEntityBuilder封裝類的對象封裝進該HttpEntity對象
HttpEntity httpEntity = mulEnBuilder.build();
//new一個指定URL的HttpPost對象，并將上面的MultipartEntityBuilder封裝類封裝進該HttpPost對象
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(httpEntity);
return doRequest(httpPost);
}
public static String executePostNew1(String type, File file, String url, String username,String user) throws Exception {
//new一個MultipartEntityBuilder封裝類的對象，并設定模式及編碼類型
MultipartEntityBuilder mulEnBuilder = MultipartEntityBuilder.create();
mulEnBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
mulEnBuilder.setCharset(Charset.forName("UTF-8"));
//封裝文本內容
mulEnBuilder.addTextBody("username", username, ContentType.create(type, Charset.forName("UTF-8")));
mulEnBuilder.addTextBody("admin", user, ContentType.create(type, Charset.forName("UTF-8")));
//封裝二進制文件
mulEnBuilder.addBinaryBody("file", file, ContentType.create("application/octet-stream", Charset.forName("UTF-8")), file.getPath());
//new一個HttpEntity封裝類的對象，并將上面的MultipartEntityBuilder封裝類的對象封裝進該HttpEntity對象
HttpEntity httpEntity = mulEnBuilder.build();
//new一個指定URL的HttpPost對象，并將上面的MultipartEntityBuilder封裝類封裝進該HttpPost對象
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(httpEntity);
return doRequest(httpPost);
}
public static String executePostTwo(String url, String username, String imgPath) throws Exception {
HttpPost httpPost = new HttpPost(url);
List <NameValuePair> nvps = new ArrayList <NameValuePair>();
//传递2个参数 name和password
nvps.add(new BasicNameValuePair("username", username));
nvps.add(new BasicNameValuePair("imgPath", imgPath));
HttpEntity reqEntity = new UrlEncodedFormEntity(nvps,Consts.UTF_8);
httpPost.setEntity(reqEntity);
return doRequest(httpPost);
}
// public static String executePostTwo(String type, String url, String username, String imgPath) throws Exception {
// //new一個MultipartEntityBuilder封裝類的對象，并設定模式及編碼類型
// MultipartEntityBuilder mulEnBuilder = MultipartEntityBuilder.create();
// mulEnBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
// mulEnBuilder.setCharset(Charset.forName("UTF-8"));
// //封裝文本內容
//
// mulEnBuilder.addTextBody("username", username, ContentType.create(type, Charset.forName("UTF-8")));
// mulEnBuilder.addTextBody("imgPath", imgPath, ContentType.create(type, Charset.forName("UTF-8")));
//
// //new一個HttpEntity封裝類的對象，并將上面的MultipartEntityBuilder封裝類的對象封裝進該HttpEntity對象
// HttpEntity httpEntity = mulEnBuilder.build();
// //new一個指定URL的HttpPost對象，并將上面的MultipartEntityBuilder封裝類封裝進該HttpPost對象
// HttpPost httpPost = new HttpPost(url);
// httpPost.setEntity(httpEntity);
// return doRequest(httpPost);
// }
}
调用：
public static String demo(String username,String createBy,File file) {
JsonResponse result = new JsonResponse();
// 将头像存入临时文件中
if (file == null) {
return "";
} else {
try {
String type = "text/plain";
// 读取url配置文件
String url = Props.getString("upload.url");//存储访问的url
String res = RESTfulClient.executePostNew1(type, file, url, username, createBy);
return res;
} catch (Exception e) {
return e.getMessage();
}
}
}
转载于:https://www.jianshu.com/p/bb19ec0baead
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