引用jar包
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
<version>4.3.1</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.5</version>
</dependency>
package com.bsx.test;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import java.io.*;
import java.util.*;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class HttpClientUtils {
public static void main(String[] args) {
Map<String, String > headers = new HashMap<>();
String nonce = String.valueOf(new Random().nextInt(10000));
String curTime = String.valueOf((new Date()).getTime() / 1000L);
headers.put("Nonce", nonce);
headers.put("CurTime", curTime);
headers.put("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
/**
* 测试下载文件 异步下载
*/
HttpClientUtils.getInstance().download(
"http://baidu.com/test.mp4", "/Users/apple/Documents/download/test.mp4",
new HttpClientUtils.HttpClientDownLoadProgress() {
@Override
public void onProgress(int progress) {
System.out.println("download progress = " + progress);
}
}, headers);
Map<String, String> params = new HashMap<String, String>();
params.put("username", "admin");
params.put("password", "admin");
HttpClientUtils.getInstance().httpPost(
"http://192.168.31.183:8080/SSHMySql/register", params);
HttpClientUtils.getInstance().httpGet(
"http://wthrcdn.etouch.cn/weather_mini?city=北京");
try {
Map<String,String> uploadParams = new LinkedHashMap<String, String>();
uploadParams.put("userImageContentType", "image");
uploadParams.put("userImageFileName", "testaa.png");
HttpClientUtils.getInstance().uploadFileImpl(
"http://192.168.31.183:8080/SSHMySql/upload", "android_bug_1.png",
"userImage", uploadParams);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 最大线程池
*/
public static final int THREAD_POOL_SIZE = 5;
public interface HttpClientDownLoadProgress {
public void onProgress(int progress);
}
private static HttpClientUtils httpClientDownload;
private ExecutorService downloadExcutorService;
private HttpClientUtils() {
downloadExcutorService = Executors.newFixedThreadPool(THREAD_POOL_SIZE);
}
public static HttpClientUtils getInstance() {
if (httpClientDownload == null) {
httpClientDownload = new HttpClientUtils();
}
return httpClientDownload;
}
/**
* 下载文件
*
* @param url
* @param filePath
*/
public void download(final String url, final String filePath) {
downloadExcutorService.execute(new Runnable() {
@Override
public void run() {
httpDownloadFile(url, filePath, null, null);
}
});
}
/**
* 下载文件
*
* @param url
* @param filePath
* @param progress
* 进度回调
*/
public void download(final String url, final String filePath,
final HttpClientDownLoadProgress progress, final Map<String, String> headerMap) {
downloadExcutorService.execute(new Runnable() {
@Override
public void run() {
httpDownloadFile(url, filePath, progress, headerMap);
}
});
}
/**
* 下载文件
*
* @param url
* @param filePath
*/
private void httpDownloadFile(String url, String filePath,
HttpClientDownLoadProgress progress, Map<String, String> headMap) {
CloseableHttpClient httpclient = HttpClients.createDefault();
try {
HttpGet httpGet = new HttpGet(url);
setGetHead(httpGet, headMap);
CloseableHttpResponse response1 = httpclient.execute(httpGet);
try {
System.out.println(response1.getStatusLine());
HttpEntity httpEntity = response1.getEntity();
long contentLength = httpEntity.getContentLength();
InputStream is = httpEntity.getContent();
ByteArrayOutputStream output = new ByteArrayOutputStream();
byte[] buffer = new byte[4096];
int r = 0;
long totalRead = 0;
while ((r = is.read(buffer)) > 0) {
output.write(buffer, 0, r);
totalRead += r;
if (progress != null) {
progress.onProgress((int) (totalRead * 100 / contentLength));
}
}
FileOutputStream fos = new FileOutputStream(filePath);
output.writeTo(fos);
output.flush();
output.close();
fos.close();
EntityUtils.consume(httpEntity);
} finally {
response1.close();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* get请求
*
* @param url
* @return
*/
public String httpGet(String url) {
return httpGet(url, null);
}
/**
* http get请求
*
* @param url
* @return
*/
public String httpGet(String url, Map<String, String> headMap) {
String responseContent = null;
CloseableHttpClient httpclient = HttpClients.createDefault();
try {
HttpGet httpGet = new HttpGet(url);
CloseableHttpResponse response1 = httpclient.execute(httpGet);
setGetHead(httpGet, headMap);
try {
System.out.println(response1.getStatusLine());
HttpEntity entity = response1.getEntity();
responseContent = getRespString(entity);
System.out.println("debug:" + responseContent);
EntityUtils.consume(entity);
} finally {
response1.close();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return responseContent;
}
public String httpPost(String url, Map<String, String> paramsMap) {
return httpPost(url, paramsMap, null);
}
/**
* http的post请求
*
* @param url
* @param paramsMap
* @return
*/
public String httpPost(String url, Map<String, String> paramsMap,
Map<String, String> headMap) {
String responseContent = null;
CloseableHttpClient httpclient = HttpClients.createDefault();
try {
HttpPost httpPost = new HttpPost(url);
setPostHead(httpPost, headMap);
setPostParams(httpPost, paramsMap);
CloseableHttpResponse response = httpclient.execute(httpPost);
try {
System.out.println(response.getStatusLine());
HttpEntity entity = response.getEntity();
responseContent = getRespString(entity);
EntityUtils.consume(entity);
} finally {
response.close();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
System.out.println("responseContent = " + responseContent);
return responseContent;
}
/**
* 设置POST的参数
*
* @param httpPost
* @param paramsMap
* @throws Exception
*/
private void setPostParams(HttpPost httpPost, Map<String, String> paramsMap)
throws Exception {
if (paramsMap != null && paramsMap.size() > 0) {
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
Set<String> keySet = paramsMap.keySet();
for (String key : keySet) {
nvps.add(new BasicNameValuePair(key, paramsMap.get(key)));
}
httpPost.setEntity(new UrlEncodedFormEntity(nvps));
}
}
/**
* 设置http的HEAD
*
* @param httpPost
* @param headMap
*/
private void setPostHead(HttpPost httpPost, Map<String, String> headMap) {
if (headMap != null && headMap.size() > 0) {
Set<String> keySet = headMap.keySet();
for (String key : keySet) {
httpPost.addHeader(key, headMap.get(key));
}
}
}
/**
* 设置http的HEAD
*
* @param httpGet
* @param headMap
*/
private void setGetHead(HttpGet httpGet, Map<String, String> headMap) {
if (headMap != null && headMap.size() > 0) {
Set<String> keySet = headMap.keySet();
for (String key : keySet) {
httpGet.addHeader(key, headMap.get(key));
}
}
}
/**
* 上传文件
*
* @param serverUrl
* 服务器地址
* @param localFilePath
* 本地文件路径
* @param serverFieldName
* @param params
* @return
* @throws Exception
*/
public String uploadFileImpl(String serverUrl, String localFilePath,
String serverFieldName, Map<String, String> params)
throws Exception {
String respStr = null;
CloseableHttpClient httpclient = HttpClients.createDefault();
try {
HttpPost httppost = new HttpPost(serverUrl);
FileBody binFileBody = new FileBody(new File(localFilePath));
MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder
.create();
multipartEntityBuilder.addPart(serverFieldName, binFileBody);
setUploadParams(multipartEntityBuilder, params);
HttpEntity reqEntity = multipartEntityBuilder.build();
httppost.setEntity(reqEntity);
CloseableHttpResponse response = httpclient.execute(httppost);
try {
System.out.println(response.getStatusLine());
HttpEntity resEntity = response.getEntity();
respStr = getRespString(resEntity);
EntityUtils.consume(resEntity);
} finally {
response.close();
}
} finally {
httpclient.close();
}
System.out.println("resp=" + respStr);
return respStr;
}
/**
* 设置上传文件时所附带的其他参数
*
* @param multipartEntityBuilder
* @param params
*/
private void setUploadParams(MultipartEntityBuilder multipartEntityBuilder,
Map<String, String> params) {
if (params != null && params.size() > 0) {
Set<String> keys = params.keySet();
for (String key : keys) {
multipartEntityBuilder
.addPart(key, new StringBody(params.get(key),
ContentType.TEXT_PLAIN));
}
}
}
/**
* 将返回结果转化为String
*
* @param entity
* @return
* @throws Exception
*/
private String getRespString(HttpEntity entity) throws Exception {
if (entity == null) {
return null;
}
InputStream is = entity.getContent();
StringBuffer strBuf = new StringBuffer();
byte[] buffer = new byte[4096];
int r = 0;
while ((r = is.read(buffer)) > 0) {
strBuf.append(new String(buffer, 0, r, "UTF-8"));
}
return strBuf.toString();
}
}