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<%@ 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>
<title>tupian</title>
</head>
<body>
<form name="upform" action="index.jsp" method="get">
<input type="file" name="file1" />
<br />
<input type="submit" value="Submit" />
<br />
<input type="reset" />
</form>
<%
if (request.getParameter("file1") != null) {
String url=String.valueOf(request.getParameter("file1"));
String[] ss = url.split(".");
if (1==1) {
out.println("<img src='" + request.getParameter("file1")
+ "'/>");
} else {
out.print("你选择的不是图片格式");
}
}
%>
</body>
</html>
out.println("<img src='" +basePath+ request.getParameter("file1")+ "'/>");
是不是这样?