圖片選擇部分：
<%@ page contentType=“text/html; charset=utf-8” language=“java” import=“java.sql.*” errorPage="" %>

<%
String path = request.getContextPath();
String basePath = request.getScheme() + “?/”
+ request.getServerName() + “:” + request.getServerPort()
+ path + “/”;
%>

相片id

資料庫連線部分：
<%@ page contentType=“text/html; charset=utf-8” language=“java” import=“java.sql.*” errorPage="" %>

<%@ page import=“java.sql."%>
<%@ page import="java.util.”%>
<%@ page import=“java.io.*”%>

<% request.setCharacterEncoding("utf-8"); String tupianid = request.getParameter("tupianid"); String filename = request.getParameter("photo"); System.out.println(filename); //ServletInputStream str=request.getInputStream(); InputStream str = new FileInputStream(filename); //byte b[]=new byte[str.available()]; //str.read(b);x //ByteArrayInputStream bi=new ByteArrayInputStream(b); String sql1 = "select * from tupian"; Statement stmt = conn4.getConnection().createStatement();

	System.out.println("連線成功");
	ResultSet rs = stmt.executeQuery(sql1);
	rs.last();
	int ID = rs.getInt("ID") + 1;
	String sql = "insert into tupian(ID,tupianid,photo) values(" + ID
			+ ",?,?)";
			
			
	PreparedStatement pstmt = conn4.getConnection().prepareStatement(
			sql);
			
			
			
	pstmt.setString(1, tupianid);
	long l = (long) str.available();
	pstmt.setBinaryStream(2, str, l);
	//out.print(bi.available());
	try {
		pstmt.executeUpdate();
	} catch (Exception e) {
		//out.print(sql);
		out.print(e.getMessage());
	}
	out.println("Success,You Have Insert an Image Successfully");
%>
 

以下是java部分
package com.conDBMS;

import java.sql.Connection;
import java.sql.DriverManager;

public class Conn {
final String MYSQLDBDRIVER = “com.mysql.jdbc.Driver”;
final String MYSQLDBURL = “jdbc:mysql://localhost/user”;
final String MYSQLDBUSER = “root”;
final String MYSQLDBUSERPASS = “root”;

public Connection getConnection() {
	try {
		Class.forName(MYSQLDBDRIVER);
		Connection con = DriverManager.getConnection(MYSQLDBURL,
				MYSQLDBUSER, MYSQLDBUSERPASS);
		return con;
	} catch (Exception e) {
		e.printStackTrace();
		return null;
	}
}
 

}

以下是網頁提示錯誤，不知道哪裡出了問題！
HTTP Status 500 - /image.jsp (line: 16, column: 0) The value for the useBean class attribute com.conDBMS.conn is invalid.
type Exception report

message /image.jsp (line: 16, column: 0) The value for the useBean class attribute com.conDBMS.conn is invalid.

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: /image.jsp (line: 16, column: 0) The value for the useBean class attribute com.conDBMS.conn is invalid.
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:41)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:275)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:107)
org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1380) org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1178)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376) org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2434) org.apache.jasper.compiler.Node$Root.accept(Node.java:464)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
org.apache.jasper.compiler.Generator.generate(Generator.java:3646)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:250)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:356)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:336)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:323)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:585)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:363)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.30 log