网页请求提交到另外一个jsp 进行处理

  • index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'fileupload.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
</head> <body>
<!-- enctype 默认是 application/x-www-form-urlencoded -->
<form action="AccepteUploadFile.jsp" enctype="multipart/form-data" method="post">
上传文件: <input
type="file" name="file1"><br /> <input type="submit"
value="提交" />
</form>
</body>
</html>
  • AccepteUploadFile.jsp
<%@ page contentType="text/html; charset=gb2312" language="java"
import="java.sql.*" errorPage=""%>
<%@ page import="java.io.*"%>
<%!public String codeToString(String str)
{
String s = str;
try
{
byte tempB[] = s.getBytes("ISO-8859-1");
s = new String(tempB);
return s;
}
catch (Exception e)
{
return s;
}
}%>
<%
String tempFileName = new String("tempFileName1");//接收上传的文件内容的临时文件的文件名
File tempFile1 = new File("f:/", tempFileName);
FileOutputStream outputFile1 = new FileOutputStream(tempFile1);
InputStream fileSource1 = request.getInputStream();//得到客户端提交的所有数据
byte b[] = new byte[1000];
int n;
while ((n = fileSource1.read(b)) != -1)
{
outputFile1.write(b, 0, n); //将得到的客户端数据写入临时文件
}
outputFile1.close();
fileSource1.close();
out.println("tempfile finish <br/>");
RandomAccessFile randomFile1 = new RandomAccessFile(tempFile1, "r"); String firstline = randomFile1.readLine();//读取第一行数据
out.println("firstline:" + firstline+"<br/>");
String FilePath = randomFile1.readLine();//读取第二行数据,这行数据包括了文件的路径和文件名
int position = FilePath.lastIndexOf('\\'); //文件名
String filename = codeToString(FilePath.substring(position + 1,
FilePath.length() - 1));
out.println("FilePath:" + FilePath+"<br/>");
randomFile1.seek(0);//重新定位指针到文件头
long forthEnterPosition = 0;
int forth = 1; //得到第4行回车符号的位置,这是上传文件的开始位置
while ((n = randomFile1.readByte()) != -1 && (forth <= 4))
if (n == '\n')
{
forthEnterPosition = randomFile1.getFilePointer();
forth++;
} File saveFile1 = new File("f:/", filename);
RandomAccessFile randomFile2 = new RandomAccessFile(saveFile1, "rw");
randomFile1.seek(randomFile1.length());
long endPosition = randomFile1.getFilePointer();//找到上传的文件数据的结束位置,即倒数第4行
int j = 1;
while ((endPosition >= 0) && (j <= 4))
{
endPosition--;
randomFile1.seek(endPosition);
if (randomFile1.readByte() == '\n')
j++;
}
randomFile1.seek(forthEnterPosition);
long startPoint = randomFile1.getFilePointer();
while (startPoint < endPosition - 1)
{
randomFile2.write(randomFile1.readByte());
startPoint = randomFile1.getFilePointer();
}
randomFile2.close();
randomFile1.close();
//tempFile1.delete();
out.print("file:" + filename + " succeed upload!<br/>");
response.getWriter().write("hello");
%>

网页请求提交到 servlet 进行处理

  • index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'fileupload.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
</head> <body>
<!-- enctype 默认是 application/x-www-form-urlencoded -->
<form action="servlet/fileServlet" enctype="multipart/form-data" method="post">
文件类型: <input type="text" name="filetype"><br />
上传文件: <input type="file" name="file1"><br /> <input type="submit" value="提交" />
</form> </body>
</html>
  • FileProgressServlet
  • package com;
    
    import java.io.*;
    import java.sql.Date;
    import java.text.SimpleDateFormat;
    import java.util.Iterator;
    import java.util.List;
    import java.util.Random; import javax.servlet.ServletConfig;
    import javax.servlet.ServletContext;
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem;
    import org.apache.commons.fileupload.FileUploadException;
    import org.apache.commons.fileupload.disk.DiskFileItemFactory;
    import org.apache.commons.fileupload.servlet.ServletFileUpload; /*
    * servlet 保存上传文件
    */
    public class FileProgressServlet extends HttpServlet
    { private static final long serialVersionUID = -7744625344830285257L;
    private ServletContext sc;
    private String savePath; public void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException
    {
    doPost(request, response);
    } public void init(ServletConfig config)
    {
    // 在web.xml中设置的一个初始化参数
    savePath = config.getInitParameter("savePath");
    sc = config.getServletContext();
    System.out.println("servler init");
    } public void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException
    {
    request.setCharacterEncoding("UTF-8");
    DiskFileItemFactory factory = new DiskFileItemFactory();
    ServletFileUpload upload = new ServletFileUpload(factory);
    try
    {
    String type = "";
    String path = ""; List<FileItem> items = upload.parseRequest(request);
    Iterator<FileItem> itr = items.iterator();
    while (itr.hasNext())
    {
    FileItem item = (FileItem) itr.next();
    if (item.isFormField())
    {
    System.out.println("表单参数名:" + item.getFieldName()
    + ",表单参数值:" + item.getString("UTF-8"));
    type = item.getString("UTF-8");
    }
    else
    {
    path = getdir(type);
    if (path == "")
    {
    request.setAttribute("upload.message", "getpath error");
    }
    if (item.getName() != null && !item.getName().equals(""))
    {
    System.out.println("上传文件的大小:" + item.getSize());
    System.out.println("上传文件的类型:" + item.getContentType());
    System.out.println("上传文件的名称:" + item.getName()); File tempFile = new File(item.getName());
    Integer rdm = new Random().nextInt();
    File file = new File(path, getDataTimeString(true) +rdm.toString()+tempFile.getName().substring(tempFile.getName().indexOf('.')));
    item.write(file);
    System.out.println("保存的上传文件:" + file.getPath());
    request.setAttribute("upload.message", "上传文件成功!");
    }
    else
    {
    request.setAttribute("upload.message", "没有选择上传文件!");
    }
    }
    }
    }
    catch (FileUploadException e)
    {
    e.printStackTrace();
    System.out.println(e.getMessage());
    }
    catch (Exception e)
    {
    e.printStackTrace();
    System.out.println(e.getMessage());
    }
    request.getRequestDispatcher("/t2.jsp").forward(request, response);
    } private String getdir(String filetype)
    {
    if (filetype == null)
    {
    return "";
    }
    String path = "F:\\youme\\{0}\\" + getDataString() + "\\";
    switch (filetype)
    {
    case "":
    path = path.replace("{0}", "image");
    break;
    case "":
    path = path.replace("{0}", "vedio");
    break;
    default:
    return "";
    }
    try
    {
    java.io.File file = new java.io.File(path);
    if (!file.exists())
    {
    if (!file.mkdirs())
    {
    return "";
    }
    }
    return path;
    }
    catch (Exception ex)
    {
    return "";
    }
    finally
    { }
    } /*
    * 获取当前时间
    */
    private static String getDataTimeString(Boolean isfilename)
    {
    try
    {
    SimpleDateFormat formatter = null;
    if (!isfilename)
    {
    formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    }
    else
    {
    formatter = new SimpleDateFormat("yyyyMMddHHmmss");
    }
    Date curDate = new Date(System.currentTimeMillis());// 获取当前时间
    return formatter.format(curDate);
    }
    catch (Exception ex)
    {
    System.out.println(ex.getMessage());
    return "";
    }
    } /*
    * 获取当前日期
    */
    private static String getDataString()
    {
    try
    {
    SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
    Date curDate = new Date(System.currentTimeMillis());// 获取当前时间
    return formatter.format(curDate);
    }
    catch (Exception ex)
    {
    System.out.println(ex.getMessage());
    return "";
    }
    }
    }

    注意:这里用了组件commons-fileupload-1.3.jar进行文件操作

  • web.xml配置一下servlet(index.jsp提交路径)
    <servlet>
<description>This is the description </description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>FileProgressServlet</servlet-name>
<servlet-class>com.FileProgressServlet</servlet-class> <init-param>
<param-name>savePath</param-name>
<param-value>uploads</param-value>
</init-param>
</servlet> <servlet-mapping>
<servlet-name>FileProgressServlet</servlet-name>
<url-pattern>/servlet/fileServlet</url-pattern>
</servlet-mapping>

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