Java 發送http請求上傳文件功能案例

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具體代碼如下所示：

package lper;

import eredReader;

import InputStream;

import OutputStream;

import ;

import InputStream;

import ception;

import tStreamReader;

import utStream;

import URLConnection;

import ;

import onnection;

import ;

import ;

import y;

public class HttpRequestUtil {

/**

* 發送get請求

*

* @param requestUrl

* 請求url

* @param requestHeader

* 請求頭

* @param responseEncoding

* 響應編碼

* @return 頁面響應html

*/

public static String sendGet(String requestUrl, Map<String, String> requestHeader, String responseEncoding) {

String result = "";

BufferedReader reader = null;

try {

if (requestUrl == null || pty()) {

return result;

}

URL realUrl = new URL(requestUrl);

URLConnection connection = Connection();

equestProperty("accept", "text/html, application/xhtml+xml, image/jxr, */*");

equestProperty("user-agent", "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0");

if (requestHeader != null && () > 0) {

for (Entry<String, String> entry : ySet()) {

equestProperty(ey(), alue());

}

}

ect();

if (responseEncoding == null || pty()) {

responseEncoding = "UTF-8";

}

reader = new BufferedReader(new InputStreamReader(nputStream(), responseEncoding));

String line;

while ((line = Line()) != null) {

result += line;

}

} catch (Exception e) {

tln("發送GET請求出現異常！");

tStackTrace();

} finally {

try {

if (reader != null) {

e();

}

} catch (Exception e) {

tStackTrace();

}

}

return result;

}

/**

* 發送post請求

*

* @param requestUrl

* 請求url

* @param requestHeader

* 請求頭

* @param formTexts

* 表單數據

* @param files

* 上傳文件

* @param requestEncoding

* 請求編碼

* @param responseEncoding

* 響應編碼

* @return 頁面響應html

*/

public static String sendPost(String requestUrl, Map<String, String> requestHeader, Map<String, String> formTexts, Map<String, String> files, String requestEncoding, String responseEncoding) {

OutputStream out = null;

BufferedReader reader = null;

String result = "";

try {

if (requestUrl == null || pty()) {

return result;

}

URL realUrl = new URL(requestUrl);

HttpURLConnection connection = (HttpURLConnection) Connection();

equestProperty("accept", "text/html, application/xhtml+xml, image/jxr, */*");

equestProperty("user-agent", "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0");

if (requestHeader != null && () > 0) {

for (Entry<String, String> entry : ySet()) {

equestProperty(ey(), alue());

}

}

oOutput(true);

oInput(true);

equestMethod("POST");

if (requestEncoding == null || pty()) {

requestEncoding = "UTF-8";

}

if (responseEncoding == null || pty()) {

responseEncoding = "UTF-8";

}

if (requestHeader != null && () > 0) {

for (Entry<String, String> entry : ySet()) {

equestProperty(ey(), alue());

}

}

if (files == null || () == 0) {

equestProperty("content-type", "application/x-www-form-urlencoded");

out = new DataOutputStream(utputStream());

if (formTexts != null && () > 0) {

String formData = "";

for (Entry<String, String> entry : ySet()) {

formData += ey() + "=" + alue() + "&";

}

formData = tring(0, th() - 1);

e(ring()ytes(requestEncoding));

}

} else {

String boundary = "-----------------------------" + eOf(new Date()ime());

equestProperty("content-type", "multipart/form-data; boundary=" + boundary);

out = new DataOutputStream(utputStream());

if (formTexts != null && () > 0) {

StringBuilder sbFormData = new StringBuilder();

for (Entry<String, String> entry : ySet()) {

nd("--" + boundary + "rn");

nd("Content-Disposition: form-data; name="" + ey() + ""rnrn");

nd(alue() + "rn");

}

e(ring()ytes(requestEncoding));

}

for (Entry<String, String> entry : ySet()) {

String fileName = ey();

String filePath = alue();

if (fileName == null || pty() || filePath == null || pty()) {

continue;

}

File file = new File(filePath);

if (!ts()) {

continue;

}

e(("--" + boundary + "rn")ytes(requestEncoding));

e(("Content-Disposition: form-data; name="" + fileName + ""; filename="" + ame() + ""rn")ytes(requestEncoding));

e(("Content-Type: application/x-msdownloadrnrn")ytes(requestEncoding));

DataInputStream in = new DataInputStream(new FileInputStream(file));

int bytes = 0;

byte[] bufferOut = new byte[1024];

while ((bytes = (bufferOut)) != -1) {

e(bufferOut, 0, bytes);

}

e();

e(("rn")ytes(requestEncoding));

}

e(("--" + boundary + "--")ytes(requestEncoding));

}

h();

e();

out = null;

reader = new BufferedReader(new InputStreamReader(nputStream(), responseEncoding));

String line;

while ((line = Line()) != null) {

result += line;

}

} catch (Exception e) {

tln("發送POST請求出現異常！");

tStackTrace();

} finally {

try {

if (out != null) {

e();

}

if (reader != null) {

e();

}

} catch (IOException ex) {

tStackTrace();

}

}

return result;

}

}