参考1:https://www.cnblogs.com/h--d/p/5638092.html
package com.util;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Iterator;
import java.util.Map;
/**
* Java原生的API可用于发送HTTP请求，即java.net.URL、java.net.URLConnection，这些API很好用、很常用，
* 但不够简便；
*
* 1.通过统一资源定位器（java.net.URL）获取连接器（java.net.URLConnection） 2.设置请求的参数 3.发送请求
* 4.以输入流的形式获取返回内容 5.关闭输入流
*
* @author H__D
*
*/
public class HttpConnectionUtil {
/**
* 多文件上传的方法
*
* @param actionUrl：上传的路径
* @param uploadFilePaths：需要上传的文件路径，数组
* @return
*/
@SuppressWarnings("finally")
public static String uploadFile(String actionUrl, String[] uploadFilePaths) {
String end = "
";
String twoHyphens = "--";
String boundary = "*****";
DataOutputStream ds = null;
InputStream inputStream = null;
InputStreamReader inputStreamReader = null;
BufferedReader reader = null;
StringBuffer resultBuffer = new StringBuffer();
String tempLine = null;
try {
// 统一资源
URL url = new URL(actionUrl);
// 连接类的父类，抽象类
URLConnection urlConnection = url.openConnection();
// http的连接类
HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;
// 设置是否从httpUrlConnection读入，默认情况下是true;
httpURLConnection.setDoInput(true);
// 设置是否向httpUrlConnection输出
httpURLConnection.setDoOutput(true);
// Post 请求不能使用缓存
httpURLConnection.setUseCaches(false);
// 设定请求的方法，默认是GET
httpURLConnection.setRequestMethod("POST");
// 设置字符编码连接参数
httpURLConnection.setRequestProperty("Connection", "Keep-Alive");
// 设置字符编码
httpURLConnection.setRequestProperty("Charset", "UTF-8");
// 设置请求内容类型
httpURLConnection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
// 设置DataOutputStream
ds = new DataOutputStream(httpURLConnection.getOutputStream());
for (int i = 0; i < uploadFilePaths.length; i++) {
String uploadFile = uploadFilePaths[i];
String filename = uploadFile.substring(uploadFile.lastIndexOf("//") + 1);
ds.writeBytes(twoHyphens + boundary + end);
ds.writeBytes("Content-Disposition: form-data; " + "name="file" + i + "";filename="" + filename
+ """ + end);
ds.writeBytes(end);
FileInputStream fStream = new FileInputStream(uploadFile);
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int length = -1;
while ((length = fStream.read(buffer)) != -1) {
ds.write(buffer, 0, length);
}
ds.writeBytes(end);
/* close streams */
fStream.close();
}
ds.writeBytes(twoHyphens + boundary + twoHyphens + end);
/* close streams */
ds.flush();
if (httpURLConnection.getResponseCode() >= 300) {
throw new Exception(
"HTTP Request is not success, Response code is " + httpURLConnection.getResponseCode());
}
if (httpURLConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
inputStream = httpURLConnection.getInputStream();
inputStreamReader = new InputStreamReader(inputStream);
reader = new BufferedReader(inputStreamReader);
tempLine = null;
resultBuffer = new StringBuffer();
while ((tempLine = reader.readLine()) != null) {
resultBuffer.append(tempLine);
resultBuffer.append("
");
}
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (ds != null) {
try {
ds.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (inputStreamReader != null) {
try {
inputStreamReader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return resultBuffer.toString();
}
}
public static void main(String[] args) {
// 上传文件测试
String str = uploadFile("http://127.0.0.1:8080/image/image.do",new String[] { "/Users//H__D/Desktop//1.png","//Users/H__D/Desktop/2.png" });
System.out.println(str);
}
}
uploadFile参考2:
http://blog.csdn.net/linfeng24/article/details/37885919
private void uploadFile() {
String end = "
";
String twoHyphens = "--";
String boundary = "*****";
String newName = "image.jpg";
String uploadFile = "storage/sdcard1/bagPictures/102.jpg";
;
String actionUrl = "http://192.168.1.123:8080/upload/servlet/UploadServlet";
try {
URL url = new URL(actionUrl);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
/* 允许Input、Output，不使用Cache */
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
/* 设置传送的method=POST */
con.setRequestMethod("POST");
/* setRequestProperty */
con.setRequestProperty("Connection", "Keep-Alive");
con.setRequestProperty("Charset", "UTF-8");
con.setRequestProperty("Content-Type",
"multipart/form-data;boundary=" + boundary);
/* 设置DataOutputStream */
DataOutputStream ds = new DataOutputStream(con.getOutputStream());
ds.writeBytes(twoHyphens + boundary + end);
ds.writeBytes("Content-Disposition: form-data; "
+ "name="file1";filename="" + newName + """ + end);
ds.writeBytes(end);
/* 取得文件的FileInputStream */
FileInputStream fStream = new FileInputStream(uploadFile);
/* 设置每次写入1024bytes */
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int length = -1;
/* 从文件读取数据至缓冲区 */
while ((length = fStream.read(buffer)) != -1) {
/* 将资料写入DataOutputStream中 */
ds.write(buffer, 0, length);
}
ds.writeBytes(end);
ds.writeBytes(twoHyphens + boundary + twoHyphens + end);
/* close streams */
fStream.close();
ds.flush();
/* 取得Response内容 */
InputStream is = con.getInputStream();
int ch;
StringBuffer b = new StringBuffer();
while ((ch = is.read()) != -1) {
b.append((char) ch);
}
/* 将Response显示于Dialog */
showDialog("上传成功" + b.toString().trim());
/* 关闭DataOutputStream */
ds.close();
} catch (Exception e) {
showDialog("上传失败" + e);
}
} 自己：
public static String sendMsg(InputStream fStream) throws Exception {
String wholeUrl = "x";
try {
wholeUrl = "x";
URL object = new URL(wholeUrl);
String end = "
";
String twoHyphens = "--";
String boundary = "*****";
HttpURLConnection con = (HttpURLConnection) object.openConnection();
con.setConnectTimeout(5000);
con.setReadTimeout(30000);
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setRequestMethod("POST");
con.setRequestProperty("Connection", "Keep-Alive");
con.setRequestProperty("Charset", "UTF-8");
con.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
con.setRequestProperty("Accept", "application/json");
DataOutputStream ds = new DataOutputStream(con.getOutputStream());
ds.writeBytes(twoHyphens + boundary + end);
ds.writeBytes("Content-Disposition: form-data; " + "name="file";filename="test.jpg"" + end);
ds.writeBytes(end);
// FileInputStream fStream = new FileInputStream(file);
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int length = -1;
while ((length = fStream.read(buffer)) != -1) {
ds.write(buffer, 0, length);
}
ds.writeBytes(end);
fStream.close();
ds.writeBytes(twoHyphens + boundary + twoHyphens + end);
LOGGER.info("CardSender start");
ds.flush();
// 显示 POST 请求返回的内容
StringBuilder sb = new StringBuilder();
int HttpResult = con.getResponseCode();
LOGGER.info("CardSender end");
if (HttpResult == HttpURLConnection.HTTP_OK)
{
BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(), "utf-8"));
String line;
while ((line = br.readLine()) != null)
{
sb.append(line + "
");
}
br.close();
System.out.println(sb);
return sb.toString();
} else {
LOGGER.error("CardSender.fail " + con.getResponseMessage());
throw new Exception("CardSender.fail " + con.getResponseMessage());
}
} catch (Exception e) {
e.printStackTrace();
LOGGER.error("CardSender.error", e);
throw new Exception("CardSender.error", e);
}
}