📄 413657.xml
字号:
<?xml version='1.0' encoding='GB2312'?>
<?xml-stylesheet type='text/xsl' href='../csdn.xsl'?>
<Topic>
<Issue>
<PostUserNickName>张杨</PostUserNickName>
<rank>一级(初级)</rank>
<ranknum>user1</ranknum>
<credit>110</credit>
<TopicId>413657</TopicId>
<TopicName>jsp如何上传文件，请给代码，解决立即给分（在线）</TopicName>
<PostUserId>140761</PostUserId>
<PostUserName>jamescheng</PostUserName>
<RoomName>JSP</RoomName>
<ReplyNum>2</ReplyNum>
<PostDateTime>2001-12-10 19:03:22</PostDateTime>
<Point>44</Point>
<ReadNum>25</ReadNum>
<RoomId>28</RoomId>
<EndState>2</EndState>
<Content>jsp如何上传文件，请给代码，解决立即给分（在线）</Content>
</Issue>
<Replys>
<Reply>
<PostUserNickName>昊天</PostUserNickName>
<rank>三级(初级)</rank>
<ranknum>user3</ranknum>
<credit>100</credit>
<ReplyID>2727419</ReplyID>
<TopicID>413657</TopicID>
<PostUserId>58261</PostUserId>
<PostUserName>hardas</PostUserName>
<Point>44</Point>
<Content>package pdm;
import java.io.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletException;
 
public class Upload {
	private static String newline = "\n";
	private String uploadDirectory = ".";
	private String ContentType = "";
	private String CharacterEncoding = "";
	private String target_file_name=null;
	private String filename="";
//	private long file_size=0;
	
/**
 * Upload 构造子注释。
 */
public Upload() {
	super();
}
/**
 * 在这里插入方法说明。
 * 建立日期：(01-1-9 16:28:45)
 */
private String getFileName(String s){
		int i = s.lastIndexOf("\\");
		if(i < 0 || i >= s.length() - 1){
			i = s.lastIndexOf("/");
			if(i < 0 || i >= s.length() - 1)
			return s;
		}
		return s.substring(i + 1);
}
	public String getUploadFileName(){ return filename;}
/**
 * 在这里插入方法说明。
 * 建立日期：(01-1-9 16:29:47)
 */
private String readLine(byte Linebyte[], int ai[],ServletInputStream servletinputstream,String CharacterEncoding){
			try{
				//readLine(byte[] buffer, int offset, int length)
				//Reads a line from the POST data.
				ai[0] = servletinputstream.readLine(Linebyte, 0, Linebyte.length);
				if(ai[0] == -1)
				return null;
			}catch(IOException _ex){
				return null;
			}
			try{
				if(CharacterEncoding == null){
					//用缺省的编码方式把给定的byte数组转换为字符串
					//String(byte[] bytes, int offset, int length)
					return new String(Linebyte, 0, ai[0]);
				}else{
					//用给定的编码方式把给定的byte数组转换为字符串
					//String(byte[] bytes, int offset, int length, String enc)
					return new String(Linebyte, 0, ai[0], CharacterEncoding);
				}
			}catch(Exception _ex){
				return null;
			}
}
/**
 * 在这里插入方法说明。
 * 建立日期：(01-1-9 16:29:47)
 */
public void setCharacterEncoding(String s){
		CharacterEncoding = s;
}
/**
 * 在这里插入方法说明。
 * 建立日期：(01-1-9 16:29:37)
 */
public void setContentType(String s){
		ContentType = s;
		int j;
		if((j = ContentType.indexOf("boundary=")) != -1){
			ContentType = ContentType.substring(j + 9);
			ContentType = "--" + ContentType;
		}
}
	public void setTargetName(String n){ target_file_name = n; }
/**
 * 在这里插入方法说明。
 * 建立日期：(01-1-9 16:29:37)
 */
public void setUploadDirectory(String s){
		uploadDirectory = s;
}
/**
 * 在这里插入方法说明。
 * 建立日期：(01-1-9 16:29:47)
 */
	public void uploadFile( HttpServletRequest req) throws ServletException, IOException{
		setCharacterEncoding(req.getCharacterEncoding());
		setContentType(req.getContentType());
		uploadFile(req.getInputStream());
}
/**
 * 在这里插入方法说明。
 * 建立日期：(01-1-9 16:29:47)
 */
public void uploadFile( ServletInputStream servletinputstream) throws ServletException, IOException{
		String s5 = null;
		//String filename = null;
		byte Linebyte[] = new byte[4096];
		byte outLinebyte[] = new byte[4096];
		int ai[] = new int[1];
		int ai1[] = new int[1];
		String line;
		//得到文件名
		while((line = readLine(Linebyte, ai, servletinputstream, CharacterEncoding)) != null){
			int i = line.indexOf("filename=");
			if(i >= 0){
				line = line.substring(i + 10);
				if((i = line.indexOf("\"")) > 0)
				line = line.substring(0, i);
				break;
			}
		}
		filename = line;
		if(filename != null && !filename.equals("\"")){
			filename = getFileName(filename);
			String sContentType = readLine(Linebyte, ai, servletinputstream, CharacterEncoding);
			if(sContentType.indexOf("Content-Type") >= 0)
				readLine(Linebyte, ai, servletinputstream, CharacterEncoding);
				//File(String parent, String child)
				//Creates a new File instance from a parent pathname string
				//and a child pathname string.
			File file;
			if(target_file_name !=null) file= new File(uploadDirectory, target_file_name);
			else file = new File(uploadDirectory,filename);
				//FileOutputStream(File file)
				//Creates a file output stream to write to the file represented
				//by the specified File object.
			FileOutputStream fileoutputstream = new FileOutputStream(file);
			while((sContentType = readLine(Linebyte, ai, servletinputstream, CharacterEncoding)) != null){
				if(sContentType.indexOf(ContentType) == 0 && Linebyte[0] == 45)
					break;
				if(s5 != null){
					//write(byte[] b, int off, int len)
					//Writes len bytes from the specified byte array starting
					//at offset off to this file output stream.
					fileoutputstream.write(outLinebyte, 0, ai1[0]);
					fileoutputstream.flush();
				}
				s5 = readLine(outLinebyte, ai1, servletinputstream, CharacterEncoding);
				if(s5 == null || s5.indexOf(ContentType) == 0 && outLinebyte[0] == 45)
					break;
				fileoutputstream.write(Linebyte, 0, ai[0]);
				fileoutputstream.flush();
			}
			byte byte0;
			if(newline.length() == 1) byte0 = 2;
			else	byte0 = 1;
			if(s5 != null && outLinebyte[0] != 45 && ai1[0] > newline.length() * byte0)
				fileoutputstream.write(outLinebyte, 0, ai1[0] - newline.length() * byte0);
			if(sContentType != null && Linebyte[0] != 45 && ai[0] > newline.length() * byte0)
				fileoutputstream.write(Linebyte, 0, ai[0] - newline.length() * byte0);
				fileoutputstream.close();
			}
}
}
/*********************上传文件的bean****************/
</Content>
<PostDateTime>2001-12-10 20:36:59</PostDateTime>
</Reply>
<Reply>
<PostUserNickName>lieejun</PostUserNickName>
<rank>一级(初级)</rank>
<ranknum>user1</ranknum>
<credit>100</credit>
<ReplyID>3744351</ReplyID>
<TopicID>413657</TopicID>
<PostUserId>179666</PostUserId>
<PostUserName>lieejun</PostUserName>
<Point>0</Point>
<Content>编译没通过。</Content>
<PostDateTime>2002-3-7 18:54:18</PostDateTime>
</Reply>
</Replys>
</Topic>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -