java模拟表单上传文件
import java.io.BufferedReader;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.URL;import java.util.ArrayList;import java.util.List;/** * 文件上传工具 * @author cc * */public class UploadTools {/** * 上传本地文件 * @param listPath * @param urlPath * @return */ public static String upload(List<String> listPath,String urlPath){//返回数据StringBuffer msg = new StringBuffer();try {String BOUNDARY = "---------7d4a6d158c9"; // 定义数据分隔线URL url = new URL(urlPath);HttpURLConnection conn = (HttpURLConnection) url.openConnection();// 发送POST请求必须设置如下两行conn.setDoOutput(true);conn.setDoInput(true);conn.setUseCaches(false);conn.setRequestMethod("POST");conn.setRequestProperty("connection", "Keep-Alive");conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");conn.setRequestProperty("Charsert", "UTF-8");conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);OutputStream out = new DataOutputStream(conn.getOutputStream());byte[] end_data = ("\r\n--" + BOUNDARY + "--\r\n").getBytes();// 定义最后数据分隔线int leng = listPath.size();for(int i=0;i<leng;i++){String fname = listPath.get(i);File file = new File(fname);StringBuilder sb = new StringBuilder();sb.append("--");sb.append(BOUNDARY);sb.append("\r\n");sb.append("Content-Disposition: form-data;name="file"+i+"";filename=""+ file.getName() + ""\r\n");sb.append("Content-Type:application/octet-stream\r\n\r\n");byte[] data = sb.toString().getBytes();out.write(data);DataInputStream in = new DataInputStream(new FileInputStream(file));int bytes = 0;byte[] bufferOut = new byte[1024];while ((bytes = in.read(bufferOut)) != -1) {out.write(bufferOut, 0, bytes);}out.write("\r\n".getBytes()); //多个文件时，二个文件之间加入这个in.close();}out.write(end_data);out.flush();out.close();// 定义BufferedReader输入流来读取URL的响应BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));String line = null;while ((line = reader.readLine()) != null) {msg.append(line);}} catch (Exception e) {e.printStackTrace();}return msg.toString();} /** * 上传网络文件 * @param listPath * @param urlPath * @return */ public static String upload(String fileName,String urlPath,byte[] bytesFile){//返回数据StringBuffer msg = new StringBuffer();try {String BOUNDARY = "---------7d4a6d158c9"; // 定义数据分隔线URL url = new URL(urlPath);HttpURLConnection conn = (HttpURLConnection) url.openConnection();// 发送POST请求必须设置如下两行conn.setDoOutput(true);conn.setDoInput(true);conn.setUseCaches(false);conn.setRequestMethod("POST");conn.setRequestProperty("connection", "Keep-Alive");conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");conn.setRequestProperty("Charsert", "UTF-8");conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);OutputStream out = new DataOutputStream(conn.getOutputStream());byte[] end_data = ("\r\n--" + BOUNDARY + "--\r\n").getBytes();// 定义最后数据分隔线// 数据流部分 //StringBuilder sb = new StringBuilder();sb.append("--");sb.append(BOUNDARY);sb.append("\r\n");sb.append("Content-Disposition: form-data;name="file";filename=""+ fileName + ""\r\n");sb.append("Content-Type:application/octet-stream\r\n\r\n");byte[] data = sb.toString().getBytes();out.write(data);//写入文件out.write(bytesFile, 0, bytesFile.length);out.write("\r\n".getBytes()); //多个文件时，二个文件之间加入这个// 数据流部分 //out.write(end_data);out.flush();out.close();// 定义BufferedReader输入流来读取URL的响应BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));String line = null;while ((line = reader.readLine()) != null) {msg.append(line);}} catch (Exception e) {e.printStackTrace();}return msg.toString();} public static void main(String[] args){ List<String> list = new ArrayList<String>(); list.add("C:\\Hydrangeas.jpg"); UploadTools.upload(list,"http://127.0.0.1/upload/uploadData.do"); }}?