Java图片上传代码



001package com.bj95ol.test;

002   

003import java.io.BufferedReader;

004import java.io.File;

005import java.io.FileNotFoundException;

006import java.io.FileOutputStream;

007import java.io.IOException;

008import java.io.InputStream;

009import java.io.InputStreamReader;

010import java.io.OutputStreamWriter;

011import java.io.PrintWriter;

012import java.net.HttpURLConnection;

013import java.net.MalformedURLException;

014import java.net.URL;

015   

016import javax.servlet.ServletInputStream;

017import javax.servlet.http.HttpServletRequest;

018   

019import sun.misc.BASE64Decoder;

020import sun.misc.BASE64Encoder;

021   

022public class SendImgToWeb {

023    /**

024     * 获得网络图片地址。或者图片地址

025     * @param url

026     * @return

027     */

028    publicString getContentFromWeb(String url)

029    {

030        String filecontent="";

031        InputStream is=null;

032        BASE64Encoder base=newBASE64Encoder();

033        if(url.startsWith("http"))

034        {

035            try{

036                HttpURLConnection urlconn=(HttpURLConnection)newURL(url).openConnection();

037                is=urlconn.getInputStream();

038            }catch (MalformedURLException e) {

039                // TODO Auto-generated catch block

040                e.printStackTrace();

041            }catch (IOException e) {

042                // TODO Auto-generated catch block

043                e.printStackTrace();

044            }

045        }

046        intn=0;

047        byte[] b=null;

048        try{

049            while((n=is.available())>0)

050            {

051                n=is.read(b);

052                if(n==-1)break;

053                filecontent=filecontent+base.encode(b);

054                   

055            }

056            is.close();

057        }catch (IOException e) {

058            // TODO Auto-generated catch block

059            e.printStackTrace();

060        }

061        returnfilecontent;

062    }

063       

064    /**

065     * 将图片内容用post方式发送到url中

066     * @param url

067     * @param postcontent

068     */

069       

070    publicvoid sendImgbyPost(String url,String postcontent)

071    {

072        try{

073            HttpURLConnection huc=(HttpURLConnection)newURL(url).openConnection();

074            huc.setDoInput(true);

075            huc.setDoOutput(true);

076            huc.setRequestMethod("POST");

077               

078            PrintWriter pw=newPrintWriter(newOutputStreamWriter(huc.getOutputStream()));

079            pw.print(postcontent);

080            pw.close();

081               

082            BufferedReader br=newBufferedReader(newInputStreamReader(huc.getInputStream()));

083            String content="";

084            String line=br.readLine();

085            while(line!=null)

086            {

087                content=content+line;

088                line=br.readLine();

089                   

090            }

091               

092        }catch (MalformedURLException e) {

093            // TODO Auto-generated catch block

094            e.printStackTrace();

095        }catch (IOException e) {

096            // TODO Auto-generated catch block

097            e.printStackTrace();

098        }

099           

100    }

101    /**

102     * 在服务器端获取发送过来的内容

103     * @param request

104     * @return

105     */

106    publicString receiveContent(HttpServletRequest request)

107    {

108        inta = 0;

109         byte[] b =new byte[4096];

110        String result="";

111        try

112        {

113         ServletInputStream sis=request.getInputStream();

114        intline=sis.readLine(b, 0, b.length);

115        while(line!=-1)

116        {

117        result=result+newString(b,0,line);

118        line=sis.readLine(b,0, b.length);

119        }

120        }

121        catch(Exception e)

122        {

123        e.printStackTrace();

124        }

125        return result;

126    }

127       

128    /**

129     * 将接受过来的信息生成文件

130     * @param request

131     * @param filename

132     */

133    publicvoid createFile(HttpServletRequest request,String filename)

134    {

135        File file=newFile(filename);

136        try{

137            FileOutputStream fos=newFileOutputStream(file);

138            String content=receiveContent(request);

139            BASE64Decoder base=newBASE64Decoder();

140            byte[] b=base.decodeBuffer(content);

141            fos.write(b);

142            fos.close();

143               

144        }catch (FileNotFoundException e) {

145            // TODO Auto-generated catch block

146            e.printStackTrace();

147        }catch (IOException e) {

148            // TODO Auto-generated catch block

149            e.printStackTrace();

150        }

151           

152    }

153   

154}