jsp页面查询附件并下载

最新推荐文章于 2023-09-30 20:26:46 发布

xyz112007241012

最新推荐文章于 2023-09-30 20:26:46 发布

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CC 4.0 BY-SA版权

分类专栏： jsp AOS word，下载，java

本文链接：https://blog.youkuaiyun.com/xyz112007241012/article/details/75330139

jsp 同时被 3 个专栏收录

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word，下载，java

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AOS

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本文档提供了一个Java Web环境中实现文件下载功能的示例代码，通过读取服务器上的文件并将其发送到客户端，展示了如何使用Servlet API进行文件下载操作。

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<%@ page language="java" import="java.util.*,java.io.*,java.net.*"
pageEncoding="UTF-8"%>
<%@ page import="com.aisino.platform.db.DbSvr"%>
<%
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%>">
</head>
<%
DbSvr db = DbSvr.getDbService("aosdb");
Map map = new HashMap();
String jjrzbxxid = request.getParameter("jjrzbxxid");
map.put("union_table_id", jjrzbxxid);
Map<String, Object> daMap = db.queryIdFirstRow("zbxtfj.zbxtfjSelectBYJjrzbxxid", map);
String file_area = daMap.get("file_area") != null ? daMap.get(
"file_area").toString() : "";
String file_address = daMap.get("file_address") != null ? daMap
.get("file_address").toString() : "";
String file_name = daMap.get("file_name") != null ? daMap
.get("file_name").toString() : "";
String pathString = file_address+file_name;
System.out.print(pathString);
out.clear();
out = pageContext.pushBody();
/* response.reset();
response.setContentType("application/x-msword");
response.addHeader("Content-Disposition","attachment;filename=" + pathString); */
/* response.setContentType("application/msword"); */

try {
String strPdfPath = new String(pathString);
//判断该路径下的文件是否存在
File file = new File(strPdfPath);
if (file.exists()) {
InputStream inputStream = null;
OutputStream outputStream = null;
byte[] b = new byte[1024];
int len = 0;
try {
inputStream = new FileInputStream(file);
outputStream = response.getOutputStream();

response.setContentType("application/x-msword");
String filename = file.getName();
filename = filename.substring(
filename.lastIndexOf("\\") + 1,
filename.length());
response.addHeader("Content-Disposition",
"inline; filename=" +URLEncoder.encode(filename, "UTF-8"));
response.setContentLength((int) file.length());

while ((len = inputStream.read(b)) != -1) {
outputStream.write(b, 0, len);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (inputStream != null) {
try {
inputStream.close();
inputStream = null;
} catch (IOException e) {
e.printStackTrace();
}
}
if (outputStream != null) {
try {
outputStream.close();
outputStream = null;
} catch (IOException e) {
e.printStackTrace();
}
}
}
} else {
out.print(strPdfPath + " 文件不存在!");
}

} catch (Exception e) {
out.println(e.getMessage());
}
%>
<body>
<br>
</body>
</html>