本文实例讲述了java实现的简单图片上传功能。分享给大家供大家参考，具体如下：
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import java.io.*;import java.net.*;/**发送端*/class picsend{ public static void main(string[] args) throws exception { if(args.length!=1) { system.out.println("请选择一张.jpg图片"); return; } file file = new file(args[0]); if (!(file.exists() && file.isfile())) { system.out.println("图片有问题(不是文件或不存在)"); return; } if(!file.getname().endswith(".jpg")) { system.out.println("图片格式不对，请重新选择图片"); return; } if(file.length()>1024*1024*10) { system.out.println("图片过大，无法上传"); return; } socket s = new socket("192.168.33.1",10006);//建立服务 fileinputstream fis = new fileinputstream("d:\\美女.jpg");//读取图片 outputstream out = s.getoutputstream();//读到的写入 byte [] b = new byte[1024]; int len = 0; while((len = fis.read(b))!= -1) { out.write(b,0,len); } s.shutdownoutput();//标记结束 inputstream in = s.getinputstream();//读服务端返回数据 byte [] bin = new byte[1024]; int num = in.read(bin); system.out.println(new string(bin,0,num)); fis.close(); s.close(); }}class picthread implements runnable{ private socket s; picthread(socket s) { this.s = s; } public void run() { int count = 1; string ip = s.getinetaddress().gethostaddress();//得到ip try { system.out.println(ip+".............connect"); inputstream in = s.getinputstream();//读到流中数据 file file = new file(ip+"("+(count)+")"+".jpg"); while(file.exists())//判断文件是否存在 file = new file(ip+"("+(count++)+")"+".jpg"); fileoutputstream fos = new fileoutputstream(file);//写入 byte [] b = new byte[1024]; int len = 0; while((len = in.read(b))!=-1) { fos.write(b,0,len); } outputstream out = s.getoutputstream();//写入服务端传过来数据 out.write("上传成功！".getbytes()); fos.close(); s.close(); } catch (exception e) { throw new runtimeexception("上传失败"); } }}/**服务端*/class picrece{ public static void main(string[] args) throws exception { serversocket ss = new serversocket(10006); while(true) { socket s = ss.accept();//接收 new thread(new picthread(s)).start(); } }} |
运行效果图如下：
希望本文所述对大家java程序设计有所帮助。
原文链接：http://blog.csdn.net/chaoyu168/article/details/49902909
