我想在路径中显示mysql中的图像。在我的项目中，我已经完成了项目中的图像副本。我也采用了复制的路径。我想用该路径显示图像。我正在获取路径在jsp中但是图像没有显示.ANONE请帮助我
Form.jsp
<%@ page language="java" %>
<HTML>
<FORM ENCTYPE="multipart/form-data" ACTION="UploadFile.jsp" METHOD=POST>
<center>
<table border="0" bgcolor=#ccFDDEE>
<tr>
<center><td colspan="2" align="center"><B>UPLOAD THE FILE</B><center></td>
</tr>
<tr><td colspan="2" align="center"> </td></tr>
<tr><td><b>Choose the file To Upload:</b></td>
<td><INPUT NAME="file" TYPE="file"></td>
</tr>
<tr><td colspan="2" align="center"> </td></tr>
<tr><td colspan="2" align="center"><input type="submit" value="Send File"> </td></tr>
<table>
</center>
</FORM>
</HTML>
UploadFile.jsp
<%@ page import="java.io.*,java.sql.*,java.util.zip.*" %>
<%
String saveFile="";
String contentType = request.getContentType();
if((contentType != null)&&(contentType.indexOf("multipart/form-data") >= 0)){
DataInputStream in = new DataInputStream(request.getInputStream());
int formDataLength = request.getContentLength();
byte dataBytes[] = new byte[formDataLength];
int byteRead = 0;
int totalBytesRead = 0;
while(totalBytesRead < formDataLength){
byteRead = in.read(dataBytes, totalBytesRead,formDataLength);
totalBytesRead += byteRead;
}
String file = new String(dataBytes);
saveFile = file.substring(file.indexOf("filename=\"") + 10);
saveFile = saveFile.substring(0, saveFile.indexOf("\n"));
saveFile = saveFile.substring(saveFile.lastIndexOf("\\") + 1,saveFile.indexOf("\""));
int lastIndex = contentType.lastIndexOf("=");
String boundary = contentType.substring(lastIndex + 1,contentType.length());
int pos;
pos = file.indexOf("filename=\"");
pos = file.indexOf("\n", pos) + 1;
pos = file.indexOf("\n", pos) + 1;
pos = file.indexOf("\n", pos) + 1;
int boundaryLocation = file.indexOf(boundary, pos) - 4;
int startPos = ((file.substring(0, pos)).getBytes()).length;
int endPos = ((file.substring(0, boundaryLocation)).getBytes()).length;
File ff = new File("D:\\REAL\\RoseIndia\\images\\"+saveFile);
FileOutputStream fileOut = new FileOutputStream(ff);
System.out.println("THE FILE OUT PATH ARE:"+fileOut);
fileOut.write(dataBytes, startPos, (endPos - startPos));
fileOut.flush();
fileOut.close();
%><br><table border="2"><tr><td><b>You have successfully upload the file:</b>
<%out.println(saveFile);%></td></tr></table>
<FORM ENCTYPE="multipart/form-data" ACTION="DisplayImage" METHOD=POST>
<input type="submit" value="Send File">
</form>
<%
Connection connection = null;
String connectionURL = "jdbc:mysql://localhost:3306/realtime";
PreparedStatement ps = null;
try{
Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection(connectionURL, "root", "root");
ps = connection.prepareStatement("insert into file(image) values(?)");
System.out.println("THE FF PATH ARE:"+ff.getPath());
ps.setString(1, ff.getPath());
int s = ps.executeUpdate();
if(s>0){
System.out.println("Uploaded successfully !");
}
else{
System.out.println("Error!");
}
}
catch(Exception e){
e.printStackTrace();
}
}
%>
DisplayImage.java
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.sql.*;
import java.util.ArrayList;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/DisplayImage")
public class DisplayImage extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out=response.getWriter();
Connection conn = null;
String url = "jdbc:mysql://localhost:3306/";
String dbName = "realtime";
String driver = "com.mysql.jdbc.Driver";
String userName = "root";
String password = "root";
Statement st;
try {
Class.forName(driver).newInstance();
conn = DriverManager.getConnection(url + dbName, userName, password);
System.out.println("Connected!");
String Name = request.getParameter("Name");
ArrayList al = null;
ArrayList Name_list = new ArrayList();
String query = "select * from file ";
st = conn.createStatement();
ResultSet rs = st.executeQuery(query);
while (rs.next()) {
al = new ArrayList();
al.add(rs.getString(1));
System.out.println("al :: " + al);
Name_list.add(al);
}
// out.println("'"+al+"'");
request.setAttribute("piList", Name_list);
RequestDispatcher view = request.getRequestDispatcher("ViewUsers.jsp");
view.forward(request, response);
conn.close();
System.out.println("Disconnected!");
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Returns a short description of the servlet.
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
在这个文件中我得到了空白的图像＆amp;那些图像的路径是正确的
ViewUsers.jsp
<%@ page import="java.util.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>
<table width="1200px" align="center" enctype="multipart/form-data"
style="border:1px solid #000000;">
<tr>
<td colspan=5 align="center"
style="background-color:teal">
<b></b></td>
</tr>
<tr style="background-color:lightgrey;">
<td><b>IMAGE</b></td>
</tr>
<%
int count = 0;
String color = "#F9EBB3";
if (request.getAttribute("piList") != null) {
ArrayList al = (ArrayList) request.getAttribute("piList");
System.out.println("Hai this is from ViewUsers.jsp"+al);
Iterator itr = al.iterator();
while (itr.hasNext()) {
if ((count % 2) == 0) {
color = "#eeffee";
}
count++;
ArrayList pList = (ArrayList) itr.next();
System.out.println("Hai this is from ViewUsers WHILE LOOP"+pList);
%>
<tr style="background-color:<%=color%>;">
<td><%=pList.get(0)%></td>
<%System.out.println("Hai this is from ViewUsers WHILE LOOP"+pList.get(0));%>
<img src="<%=pList.get(0)%>" alt="Image" width="160" height="160" class="img-thumbnail">
</tr>
<%
}
}
if (count == 0) {
%>
<tr>
<td colspan=4 align="center"
style="background-color:#eeffee"><b>Nope</b></td>
</tr>
<% }
%>
</table>
</body>
</html>