java客户端仿http传送文件到php服务器

如果是文件较小可以直接使用传参传递：

java客户端代码：

package senssic.demo;import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.File;import java.io.FileReader;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import java.net.URLConnection;import java.util.Scanner;public class HttpCon {public static void main(String[] args) {try {File file = new File("d:" + File.separator + "fg740p.exe");String fname = file.getName();long flength = file.length();String date = "";BufferedReader bfReader = new BufferedReader(new FileReader(file));// 此处如果不是文本文件需要将数据流转换为字符串，post和get只能传递字符串StringBuilder sBuilder = new StringBuilder();while ((date = bfReader.readLine()) != null) {sBuilder.append(date);}bfReader.close();String urlParameters = "fname=" + fname + "&flength=" + flength+ "&file=" + sBuilder.toString();URL url = new URL("http://127.0.0.1/index.php");URLConnection uConnection = url.openConnection();HttpURLConnection hConnection = (HttpURLConnection) uConnection;hConnection.setDoInput(true);hConnection.setDoOutput(true);hConnection.setInstanceFollowRedirects(true);hConnection.setRequestMethod("POST");// 可能受限制如果文件比较大，毕竟是通过传参传文件的hConnection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");hConnection.setRequestProperty("charset", "utf-8");hConnection.setRequestProperty("Content-Length",Integer.toString(urlParameters.getBytes().length));hConnection.setUseCaches(false);DataOutputStream dStream = new DataOutputStream(hConnection.getOutputStream());dStream.writeBytes(urlParameters);dStream.flush();dStream.close();InputStream iStream = hConnection.getInputStream();Scanner scanner = new Scanner(iStream);scanner.useDelimiter("\n");while (scanner.hasNext()) {System.out.println(scanner.next());}hConnection.disconnect();} catch (Exception e) {e.printStackTrace();}}}

php端代码：

<?php$fp=fopen("d://fg740p.exe","a+");$str="文件名：".$_POST["fname"]."文件长度：".$_POST["flength"]."文件内容：".$_POST["file"];fwrite($fp,$_POST["file"]);echo $str;?>

这样缺点比较大，因为post数据限制使用大数据就会不能传递，所以我们使用数据流的方式接收代码如下：

java端：

package senssic.demo;import java.io.ByteArrayInputStream;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import java.io.OutputStream;import java.io.SequenceInputStream;import java.net.HttpURLConnection;import java.net.URL;import java.util.Scanner;public class httpcon2 {public static void main(String[] args) {try {File file = new File("d:" + File.separator + "fg740p.exe");String fname = file.getName();long flength = file.length();InputStream fStream = new FileInputStream(file);String tempstr = "文件名:" + fname + "|\n|文件长度:" + flength + "|\n|";//使用|\n|划分InputStream iStream = new ByteArrayInputStream((tempstr.getBytes()));SequenceInputStream stream = new SequenceInputStream(iStream,fStream);URL url = new URL("http://127.0.0.1/index.php");HttpURLConnection hConnection = (HttpURLConnection) url.openConnection();hConnection.setDoInput(true);hConnection.setDoOutput(true);hConnection.setInstanceFollowRedirects(true);hConnection.setRequestMethod("POST");hConnection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");hConnection.setRequestProperty("charset", "utf-8");hConnection.setUseCaches(false);OutputStream oStream = hConnection.getOutputStream();int temp = 0;while ((temp = stream.read()) != -1) {oStream.write(temp);}InputStream iconStream = hConnection.getInputStream();Scanner scanner = new Scanner(iconStream);scanner.useDelimiter("\n");while (scanner.hasNext()) {System.out.println(scanner.next());}stream.close();oStream.flush();oStream.close();fStream.close();iStream.close();} catch (Exception e) {e.printStackTrace();}}}

php端：

<?php$fp=fopen("e://fg740p.exe","a+");$f=file_get_contents("php://input");$estr=explode("|\n|",$f);//使用|\n|划分fwrite($fp,$estr[2]);$str="文件名：".$estr[0]."文件长度".$estr[1];echo $str;?>

输出结果：

文件名：文件名:fg740p.exe文件长度文件长度:2976536

如果显示413（服务器返回的）

需要修改php.ini和对应服务器的配置文件，将上传文件调到最大就行了，因为我使用的是ngnix所以需要设置的是：

php.info

post_max_size = 10M
upload_max_filesize = 10M

ngnix.conf

找到http{}段，加入如下一句：
client_max_body_size 10m; 

弊端，主要是划分界符的问题，如果你传送的字符串或二进制流和|\n|的二进制流一样的话就会产生错误以为数组元素增加了