使用httpclient實現上傳下載（javaWeb系統資料傳輸http實現）
阿新 • • 發佈：2019-01-29
目的：專案被拆分為兩個javaWeb專案，實現專案之間資料傳輸以及上傳、下載功能。
前臺展示專案A，後臺提供資料支援專案B
題外話：
兩個javaWeb傳輸之間使用json比較方便，如果恰好使用SpringMVC，配置相關JSON轉換工具(功能很強大非常好用)，在@Controller層加上@ResponseBody自動將返回值轉化成json格式
<mvc:annotation-driven content-negotiation-manager="contentNegotiationManager"> <mvc:message-converters register-defaults="true"> <!-- 將StringHttpMessageConverter的預設編碼設為UTF-8 --> <bean class="org.springframework.http.converter.StringHttpMessageConverter"> <constructor-arg value="UTF-8" /> </bean> <!-- 將Jackson2HttpMessageConverter的預設格式化輸出設為true --> <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="prettyPrint" value="true"/> <property name="objectMapper"> <bean class="com.fasterxml.jackson.databind.ObjectMapper"> <property name="dateFormat"> <bean class="java.text.SimpleDateFormat"> <constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss" /> </bean> </property> </bean> </property> </bean> </mvc:message-converters> </mvc:annotation-driven> <!-- REST中根據URL字尾自動判定Content-Type及相應的View --> <bean id="contentNegotiationManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean"> <property name="ignoreAcceptHeader" value="true" /> <property name="defaultContentType" value="application/json" /> <property name="mediaTypes" > <value> json=application/json xml=application/xml </value> </property> </bean> <!-- jsp配置檢視解析 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/page/"/> <property name="suffix" value=".jsp"/> </bean>
進入正題：
上傳程式碼： A呼叫上傳工具類(最頭疼的問題就是檔名亂碼)
/** * 檔案上傳 * @param is * @param fileName * @param url * @return */ public static String uploadFile(InputStream is ,String fileName ,String url){ String result = null; HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost(url); //防止檔名亂碼 InputStreamBody fileis = new InputStreamBody(is,ContentType.create("text/plain", Consts.UTF_8),fileName); HttpEntity reqEntity = null; HttpResponse responses = null; try { //BROWSER_COMPATIBLE 設定瀏覽器為相容模式 隨便設定編碼防止亂碼 reqEntity = MultipartEntityBuilder.create().setMode(HttpMultipartMode.BROWSER_COMPATIBLE) .addPart("Filedata", fileis).setCharset(CharsetUtils.get("utf-8")).build(); httppost.setEntity(reqEntity); // 如果需要登陸加上sessionId httppost.addHeader(new BasicHeader("Cookie", "sessionId=" + clientUser.getSessionId())); responses = httpclient.execute(httppost); HttpEntity entity = responses.getEntity(); if(entity != null){ result = EntityUtils.toString(entity, Charset.forName("utf-8")); } } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return result; }
B使用SpringMvc方便得到傳入的檔案。
return model;} ------------------------------------------------------------------------------------@RequestMapping(value="/upload",method=RequestMethod.POST) @ResponseBody public ModelMap upload(MultipartRequest request){ ModelMap model = new ModelMap(); MultipartFile file = request.getFile("Filedata"); String realName= null; realName = new Date().getTime() + "_" +file.getOriginalFilename(); File targetFile = new File(UPLOAD_PATH, realName); if (!targetFile.exists()) { targetFile.mkdirs(); } //生成檔案<pre name="code" class="java"> file.transferTo(targetFile);
下載
A呼叫下載 上程式碼
/**
* 檔案下載
* @param url
* @param fileName
* @return
*/
public static InputStream fileDownload(String url,String fileName){
CloseableHttpClient httpclient = new HttpUtils().buildHttpClient();
HttpPost httppost = new HttpPost(url);
StringEntity sEntity = new StringEntity(fileName, Charset.forName("utf-8"));
// BasicNameValuePair basicNameValuePair = new BasicNameValuePair("fileName",fileName);
// List<NameValuePair> list = new ArrayList<NameValuePair>();
// list.add(basicNameValuePair);
// UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(list, Charset.forName("utf-8"));
// httppost.setEntity(formEntity);
httppost.setEntity(sEntity);
httppost.addHeader(new BasicHeader("Cookie", "sessionId=" + clientUser.getSessionId()));
httppost.addHeader("Content-Type", "application/xml;charset=utf-8");
try {
CloseableHttpResponse responses = httpclient.execute(httppost);
HttpEntity entity = responses.getEntity();
InputStream content = entity.getContent();
return content;
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}B服務端程式碼：遮蔽了response.set部分程式碼，不然會報一個奇怪的錯，無法解決。
@RequestMapping(value="/fileDownload",method=RequestMethod.POST)
@ResponseBody
public void fileDownload(HttpServletRequest request,HttpServletResponse response){
// getXmlContent獲取流傳輸的檔名,當然也可以使用request.getAttribute獲取檔名，需要httpclient做一些設定
String fileName = getXmlContent(request).trim();
System.out.println("開始下載檔案....." + fileName);
try {
File file = new File(DOWNLOAD_PATH + fileName);
if(!file.exists() || !file.isFile()){
System.out.println("檔案不存在。。" + fileName );
return;
}
//response.setCharacterEncoding("utf-8");
//response.setContentType("multipart/form-data");
//response.setHeader("Content-Disposition", "attachment;fileName=" + fileName);
InputStream inputStream = new FileInputStream(file);
OutputStream os = response.getOutputStream();
byte[] b = new byte[1024];
int length;
while ((length = inputStream.read(b)) > 0) {
os.write(b, 0, length);
}
// Long filelength = file.length();
// byte[] b = new byte[filelength.intValue()];
// inputStream.read(b);
// os.write(b, 0, filelength.intValue());
inputStream.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}如果服務端A的下載檔案為中文名，需要轉碼
try {
fileName = new String(fileName.getBytes("iso8859-1"),"UTF-8");
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}--------------------------------------------------------------------------------無敵大冬瓜-------------------------------------------------------------------------------------------------------------------------
貼段程式碼
import java.io.IOException;
import java.nio.charset.Charset;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocket;
import org.apache.commons.lang.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
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.config.ConnectionConfig;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.config.SocketConfig;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.LayeredConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContexts;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicHeader;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
public class HttpUtils {
public static String defaultEncoding= "utf-8";
public static void main(String[] args) {
HttpUtils httpUtils = new HttpUtils();
//String result = httpUtils.postRequest("https://zeustracker.abuse.ch/monitor.php?filter=all");
String result = httpUtils.getRequest("https://hgcg.customs.gov.cn/hgcg/cggg/004001/MoreInfo.aspx?CategoryNum=004001");
//String result = httpUtils.getRequest("http://www.baidu.com");
System.out.println("result="+result);
}
/**
* post方式傳送xml資料
* @param url
* @param xmlData
* @return
*/
public String sendXMLDataByPost(String url, String xmlData, String sessionId){
Map<String, String> headersMap = new HashMap<String, String>();
headersMap.put("Content-Type", "application/xml;charset=utf-8");
if(StringUtils.isNotBlank(sessionId)){
headersMap.put("Cookie", "sessionId="+sessionId);
}
return this.postRequest(url, headersMap, xmlData);
}
/**
* 傳送http post請求，並返回響應實體
* @param url 請求地址
* @return url響應實體
*/
public String postRequest(String url){
return postRequest(url, null, "");
}
/**
* 傳送http post請求，並返回響應實體
* @param url 請求的url
* @param headersMap 請求需要新增的請求頭
* @return url響應實體
*/
public String postRequest(String url, Map<String, String> headersMap){
return postRequest(url, headersMap, "");
}
/**
* 傳送http post請求，並返回響應實體
* @param url 訪問的url
* @param headersMap 請求需要新增的請求頭
* @param paramsMap 請求的引數
* @return
*/
public String postRequest(String url, Map<String, String> headersMap, Map<String, String> paramsMap){
String result = null;
CloseableHttpClient httpClient = buildHttpClient();
HttpPost httpPost = new HttpPost(url);
if(null != headersMap && headersMap.size() > 0){
for (Entry<String, String> entry : headersMap.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
httpPost.addHeader(new BasicHeader(key, value));
}
}
List<NameValuePair> list = new ArrayList<NameValuePair>(paramsMap.size());
if(null != paramsMap && paramsMap.size() > 0){
for (Entry<String, String> entry : paramsMap.entrySet()) {
list.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
}
try{
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(list, Charset.forName(defaultEncoding));
httpPost.setEntity(formEntity);
CloseableHttpResponse response = httpClient.execute(httpPost);
try{
HttpEntity entity = response.getEntity();
if(entity != null){
result = EntityUtils.toString(entity, Charset.forName(defaultEncoding));
}
}finally{
response.close();
}
}catch(Exception ex){
ex.printStackTrace();
}finally{
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
}
/**
* 傳送http post請求，並返回響應實體
* @param url 訪問的url
* @param headersMap 請求需要新增的請求頭
* @param paramsMap 請求實體內容
* @return
*/
public String postRequest(String url, Map<String, String> headersMap, String content){
String result = null;
CloseableHttpClient httpClient = buildHttpClient();
HttpPost httpPost = new HttpPost(url);
if(null != headersMap && headersMap.size() > 0){
for (Entry<String, String> entry : headersMap.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
httpPost.addHeader(new BasicHeader(key, value));
}
}
try{
if(StringUtils.isNotBlank(content)){
httpPost.setEntity(new StringEntity(content, Charset.forName(defaultEncoding)));
}
CloseableHttpResponse response = httpClient.execute(httpPost);
try{
HttpEntity entity = response.getEntity();
if(entity != null){
result = EntityUtils.toString(entity, Charset.forName(defaultEncoding));
}
}finally{
response.close();
}
}catch(Exception ex){
ex.printStackTrace();
}finally{
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
}
/**
* 傳送http get請求
* @param url 請求url
* @return url返回內容
*/
public String getRequest(String url){
return getRequest(url, "");
}
/**
* 傳送http get請求
*/
public String getRequest(String url, String sessionId) {
Map<String, String> headersMap = new HashMap<String, String>();
headersMap.put("Content-Type", "application/xml;charset=utf-8");
if(StringUtils.isNotBlank(sessionId)){
headersMap.put("Cookie", "sessionId="+sessionId);
}
return getRequest(url, headersMap);
}
/**
* 傳送http get請求
* @param url 請求的url
* @param headersMap 請求頭
* @return
*/
public String getRequest(String url, Map<String, String> headersMap){
String result = null;
CloseableHttpClient httpClient = buildHttpClient();
try{
HttpGet httpGet = new HttpGet(url);
if(null != headersMap && headersMap.size() > 0){
for (Entry<String, String> entry : headersMap.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
httpGet.addHeader(new BasicHeader(key, value));
}
}
CloseableHttpResponse response = httpClient.execute(httpGet);
try{
HttpEntity entity = response.getEntity();
if(null != entity){
result = EntityUtils.toString(entity, defaultEncoding);
}
}finally{
response.close();
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
}
/**
* 建立httpclient
* @return
*/
public CloseableHttpClient buildHttpClient() {
try {
RegistryBuilder<ConnectionSocketFactory> builder = RegistryBuilder.create();
ConnectionSocketFactory factory = new PlainConnectionSocketFactory();
builder.register("http", factory);
KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
SSLContext context = SSLContexts.custom().useTLS().loadTrustMaterial(trustStore, new TrustStrategy() {
@Override
public boolean isTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
return true;
}
}).build();
//LayeredConnectionSocketFactory sslFactory = new SSLConnectionSocketFactory(context, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
LayeredConnectionSocketFactory sslFactory = new SSLConnectionSocketFactory(context, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER){
protected void prepareSocket(SSLSocket socket) throws IOException {
// Workaround to use different order of CipherSuites used by Java6 in order
// to avoid the the problem of java7 "Could not generate DH keypair"
String[] enabledCipherSuites = socket.getEnabledCipherSuites();
// but to avoid hardcoding a new list, we just remove the entries
// which cause the exception (via TrialAndError)
List<String> asList = new ArrayList<String>(Arrays.asList(enabledCipherSuites));
// we identified the following entries causeing the problems
// "Could not generate DH keypair"
// and "Caused by: java.security.InvalidAlgorithmParameterException: Prime size must be multiple of 64, and can only range from 512 to 1024 (inclusive)"
asList.remove("TLS_DHE_RSA_WITH_AES_128_CBC_SHA");
asList.remove("SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA");
asList.remove("TLS_DHE_RSA_WITH_AES_256_CBC_SHA");
String[] array = asList.toArray(new String[0]);
socket.setEnabledCipherSuites(array);
};
};
builder.register("https", sslFactory);
Registry<ConnectionSocketFactory> registry = builder.build();
PoolingHttpClientConnectionManager manager = new PoolingHttpClientConnectionManager(registry);
ConnectionConfig connConfig = ConnectionConfig.custom().setCharset(Charset.forName(defaultEncoding)).build();
SocketConfig socketConfig = SocketConfig.custom().setSoTimeout(100000).build();
manager.setDefaultConnectionConfig(connConfig);
manager.setDefaultSocketConfig(socketConfig);
return HttpClientBuilder.create().setConnectionManager(manager).build();
} catch (KeyStoreException e) {
e.printStackTrace();
} catch (KeyManagementException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return null;
}
}