Question

我正在尝试将MySQL服务器上的图像显示到浏览器上。但是以下代码可在Internet Explorer上运行，但不能在Chrome和Mozilla Firefox浏览器上运行。

我是JSP的新手，我已经尝试过该问题的代码，但是没有用。Displaying image in jsp from database

`<%@ include file="connect.jsp" %>
 <%@page import="java.sql.*,java.io.*"%>
 <%@ page import="java.sql.*,java.io.*,java.util.*" %> 
 <%

try{  

    int id = Integer.parseInt(request.getParameter("id"));
    Statement st=connection.createStatement();
            String strQuery = "select image from user where id="+id+"" ;
            ResultSet rs = st.executeQuery(strQuery);
            String imgLen="";
            if(rs.next())
    {
                imgLen = rs.getString(1);
            }  

            rs = st.executeQuery(strQuery);
            if(rs.next())
    {
                int len = imgLen.length();
                byte [] rb = new byte[len];
                InputStream readImg = rs.getBinaryStream(1);
                int index=readImg.read(rb, 0, len);  
                st.close();
                response.reset();
                response.getOutputStream().write(rb,0,len); 
                response.getOutputStream().flush();        
    }   
}
catch (Exception e){
    e.printStackTrace();
}%>

Answer 1

要从SQL数据库中检索多个图像并显示在JSP页面中，可以执行以下操作：

<%
  int id =  Integer.parseInt(request.getParameter("imgid"));

  try {
    Connection con=DriverManager.getConnection("jdbc:sqlserver://LAPTOP-UT57IH20\\SQLEXPRESS14;databaseName=Student;user=sa;password=ccms@321");
    Statement st = con.createStatement();
    String strQuery = "select image from login_users where id='" + id + "'";
    ResultSet rs = st.executeQuery(strQuery);
    String imgLen="";
    if(rs.next()) {

      imgLen = rs.getString(1);
    }  
      rs = st.executeQuery(strQuery);
      if(rs.next()) {
      byte[] bytearray = new byte[4096];
      int size=0;
      InputStream sImage = rs.getBinaryStream(1);
      response.reset();
      response.setContentType("image/jpeg");
      while((size=sImage.read(bytearray))!= -1) {

        response.getOutputStream().write(bytearray,0,size);
      }
      response.getOutputStream().flush();
      response.getOutputStream().close();
      response.flushBuffer();
      sImage.close();
      rs.close();
    }
  }
  catch (Exception e) {

    e.printStackTrace();
  }
%>

我的代码未在Chrome浏览器上显示图片，但可以在Internet Explorer上找到

1 个答案: