图像不显示在任何浏览器，但显示在Eclipse的默认浏览器在jsp页面

问题描述：

我有一个程序，从数据库检索图像的路径。程序在eclipse浏览器中成功检索图像，但不能在任何网页浏览器中检索。我有图像不显示在任何浏览器，但显示在Eclipse的默认浏览器在jsp页面

------------------------------login.jsp------------------------------------------------- 
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" 
pageEncoding="ISO-8859-1"%> 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"  "http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
<head> 
<title>Please Login</title> 

</head> 
<body> 
<form action="log" method="post"> 
<center> 
    <div> 
     <span>Email Id</span><input type="text" name="email" placeholder="Enter Email"><br> 
     <span>Password</span><input type="password" name="upass" placeholder="enter password"> <br> 
     <input type="submit" name="sub" value="Login" id="sub"> 
    </div> 
</center> 
</form> 

</body> 
</html> 

---------------------------------LoginServlet.java-------------------------------------------------------------- 

import java.io.IOException; 
import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import java.sql.SQLException; 

import javax.servlet.RequestDispatcher; 
import javax.servlet.ServletContext; 
import javax.servlet.ServletException; 
import javax.servlet.annotation.WebServlet; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
import javax.servlet.http.HttpSession; 

import org.apache.catalina.Session; 


@WebServlet("/LoginServlet") 
public class LoginServlet extends HttpServlet { 
private static final long serialVersionUID = 1L; 


public LoginServlet() { 
    super(); 

} 


protected void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException,  IOException { 
    String sessionName="sessionmail"; 
    String getEmail=req.getParameter("email"); 
    String getPass=req.getParameter("upass"); 
    try { 
     Class.forName("oracle.jdbc.driver.OracleDriver"); 
     Connection   con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","system","maneger"); 
     PreparedStatement ps=con.prepareStatement("select * from final_social where uemail=? and upass=? "); 
     ps.setString(1, getEmail); 
     ps.setString(2, getPass); 
     ResultSet rs=ps.executeQuery(); 

     while(rs.next()){ 
      if(getEmail.equalsIgnoreCase(rs.getString(3)) && getPass.equals(rs.getString(2))){ 
       System.out.println("unam and pass match"); 
       HttpSession session=req.getSession(true); 
       session.setAttribute("sessionName", getEmail); 
       System.out.println(sessionName); 

       String nextJSP = "/Index.jsp"; 
       RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(nextJSP); 
       dispatcher.forward(req,res); 
      } 
      else{ 
       System.out.println("not match"); 
      } 
     } 
    } catch (ClassNotFoundException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } catch (SQLException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
    } 
} 

----------------------------------------Index.jsp------------------------------------------------ 
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" 
pageEncoding="ISO-8859-1"%> 
<%@page import="javax.xml.crypto.OctetStreamData"%> 
<%@page import="java.sql.Statement"%> 
<%@page import="java.sql.DriverManager"%> 
<%@page import="java.sql.ResultSet"%> 
<%@page import="java.sql.PreparedStatement"%> 
<%@page import="java.sql.Connection"%> 
<%@page import="java.io.*"%> 
<% String filename=""; 
Connection con=null; 
PreparedStatement ps=null; 
ResultSet rs=null; 
%> 
<%Class.forName("oracle.jdbc.driver.OracleDriver"); 
    con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","system","maneger"); 
    //String sessionId=session.getAttribute("sessionName"); 

     ps=con.prepareStatement("select uname,photo from final_social where uemail=?"); 
     ps.setObject(1, session.getAttribute("sessionName")); 
     rs=ps.executeQuery(); 

     %> 
<!DOCTYPE html> 
<html> 
<head> 
<title>Welcome</title> 
<style> 
#uimage{ 
    width: 200px; 
    height: 200px; 
    border-radius: 120px; 
} 
</style> 

</head> 

<body> 
<%while(rs.next()) 
{ 
    filename=rs.getString(2); 
} 
%> 
<img src="file:///<%=filename %>" name="uimage" id="uimage"> 

</body> 
</html>

答

而不是使用像file:///<%=filename %>绝对路径的3第1页的login.jsp 2的index.jsp 3.LoginServlet.java，创建你WebContent文件夹内的一个名为“IMG”文件夹，并把所有的里面的图像。所以，你的文件夹应该是这样的：

WebContent 
      |_img 
       |_img1.jpg 
       |_img2.jpg

，并在你的数据库只保存image names，因为你已经知道在哪里可以找到图像。所以，现在在你的JSP引用的时候，做这样的事情：

<img src="${pageContext.request.contextPath}/img/<%=filename %>" name="uimage" id="uimage">

PS：但你不应该从你的JSP做你的CRUD操作，只是说.. :)

感谢现在的作品。 – 2014-09-21 13:05:21

图像不显示在任何浏览器，但显示在Eclipse的默认浏览器在jsp页面

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