直接通过图片的地址来把图片保存到物理位置或数据库里面，这样的做法可以吗？
我想通过io流来实现。大家有没有例子？
------解决方案--------------------你也只能通过IO流来实现。
例子就是读写二进制的文件流
------解决方案--------------------同上
找读写二进制的文件流即可，多动手试一下。
------解决方案--------------------恩,读流.....
------解决方案--------------------Java code
mport java.sql.*;
public class TestInsert {
public static void main(String[] args){
String connectionUrl = "jdbc:sqlserver://localhost:1433;DatabaseName=mydata;user=sa;password=";
Connection conn = null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
conn = DriverManager.getConnection(connectionUrl);
java.io.File file = new java.io.File("d:\\123.jpg");
java.io.FileInputStream fis = new java.io.FileInputStream(file);
ResultSet result=null;
String sql=null;
PreparedStatement prestmt=null;
sql="insert into test(tid,tdata) values(?,?)";
prestmt =conn.prepareStatement(sql);
prestmt.setInt(1, 1);
prestmt.setBinaryStream(2,fis,(int)file.length());
prestmt.executeUpdate();
System.out.println("success!");
conn.close();
}
catch(Exception e){System.out.println("error: " + e);}
}
}
------解决方案--------------------
存放到硬盘上：
jsp页面
Java code
<%@ 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 'daoRuform.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="uploadDRFile.jsp" method="post" enctype="multipart/form-data">
<input name ="daoru" type="file">
<input name = "tijiao" type="submit" value="导入">
</form>
</body>
</html>
------解决方案--------------------
java代码，写在jsp里的
Java code
<%@ page contentType="text/html; charset=gb2312" %>
<%@ page language="java" %>
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>
<html>
<head>
<title>
导入测试
</title>
</head>
<body bgcolor="#ffffff">
<center>
<%
int MAX_SIZE = 102400 * 102400;//定义上载文件的最大字节
String rootPath; // 创建根路径的保存变量
DataInputStream in = null; //声明文件读入类
FileOutputStream fileOut = null;
String remoteAddr = request.getRemoteAddr();//取得客户端的网络地址IP
//out.print(remoteAddr);
//out.print("<br>");
String serverName = request.getServerName(); //获得服务器的名字
out.print("你访问的网站是："+serverName);
out.print("<br>");
//取得jsp文件相对与根地址的地址
out.print("jsp文件相对与根地址的地址:"+request.getServletPath());
out.print("<br>");
String realPath = request.getRealPath(serverName); //取得互联网程序的绝对地址
//out.println(realPath);
//out.print("<br>");
realPath = realPath.substring(0, realPath.lastIndexOf("\\"));
//out.print(realPath);
rootPath = realPath + "\\images\\temp\\"; //创建文件的保存目录upload
//传到服务器上的路径是：<%out.println(rootPath);
String contentType = request.getContentType(); //取得客户端上传的数据类型
//out.println("<p>客户端上传的数据类型 = " + contentType + "</p>");
try {
if(contentType != null && contentType.indexOf("multipart/form-data") >= 0)
{
//读入上传的数据
in = new DataInputStream(request.getInputStream());
int formDataLength = request.getContentLength();
if (formDataLength > MAX_SIZE) {
out.print("<P>上传的文件字节数不可以超过" + MAX_SIZE + "</p>");
return;
}
//保存上传文件的数据
byte dataBytes[] = new byte[formDataLength];//放在一个字符数组里
int byteRead = 0;
int totalBytesRead = 0;
//上传的数据保存在byte数组
while (totalBytesRead < formDataLength) {
byteRead = in.read(dataBytes, totalBytesRead,
formDataLength);
totalBytesRead += byteRead;
}
//根据byte数组创建字符串
String file = new String(dataBytes);
//out.println(file);
//取得上传的数据的文件名
String 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("=");
//取得数据的分隔字符串
String boundary = contentType.substring(lastIndex + 1,
contentType.length());
//创建保存路径的文件名
String fileName = rootPath + saveFile;
//out.print(fileName);
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;
//out.println(boundaryLocation);
//取得文件数据的开始的位置
int startPos = ((file.substring(0, pos)).getBytes()).length;
//out.println(startPos);
//取得文件数据的结束的位置
int endPos = ((file.substring(0, boundaryLocation)).getBytes()).length;
//out.println(endPos);
//检查上载文件是否存在
File checkFile = new File(fileName);
if (saveFile.indexOf(".xls") < 0) {
out.print("<p>你上传的文件不是文本文件！</p>");
} else {
if (checkFile.exists()) {
out.println("<p>" + saveFile + "文件已经存在.</p>");
}
//检查上载文件的目录是否存在
File fileDir = new File(rootPath);
if (!fileDir.exists()) {
fileDir.mkdirs();
}
//创建文件的写出类
fileOut = new FileOutputStream(fileName);
//保存文件的数据
fileOut.write(dataBytes, startPos, (endPos - startPos));
fileOut.close();
out.println("<P>" + saveFile + "文件成功上载.</p>");
}
/**else{
String content = request.getContentType();
out.println
("<p>上传的数据类型不是是multipart/form-data</p>");
}*/
}
}catch(Exception e){e.printStackTrace();}
%>
</center>
</body>
</html>