多平台统一管理软件接口,如何实现多平台统一管理软件接口
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2023-07-12
JavaWeb Struts文件上传功能实现详解
一.Struts文件上传的思路
之前也讲过了FileUpload这个组件,功能很强大,但是操作繁琐复杂。这次,在Strust中也对文件上传有所支持,并FileUpload进行了包装,用起来方便了许多。
这里涉及到了一个标签和一个类:
用这个标签可以上传文件,但是要接收次内容必须依靠org.apache.struts.upload.FormFile
接口完成。
二.实现
sh.jsp:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean"
prefix="bean"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html"
prefix="html"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic"
prefix="logic"%>
UploadForm.java:
package com.zyy.struts.form;
import org.apache.struts.action.ActionForm;
import org.apache.struts.upload.FormFile;
public class UploadForm extends ActionForm {
private FormFile photo;
public FormFile getPhoto() {
return photo;
}
public void setPhoto(FormFile photo) {
this.photo = photo;
}
}
IPTimeStamp.java:
package com.zyy.util;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
public class IPTimeStamp {
private SimpleDateFormat sdf = null;
private String ip = null;
public IPTimeStamp() {
}
public IPTimeStamp(String ip) {
this.ip = ip;
}
public String getIPTimeRand() {
StringBuffer buf = new StringBuffer();
if (this.ip != null) {
String s[] = this.ip.split("\\.");
for (int i = 0; i < s.length; i++) {
buf.append(this.addZero(s[i], 3));
}
}
buf.append(this.getTimeStamp());
Random r = new Random();
for (int i = 0; i < 3; i++) {
buf.append(r.nextInt(10));
}
return buf.toString();
}
public String getDate() {
this.sdf = new SimpleqkgtoDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
return this.sdf.format(new Date());
}
public String getTimeStamp() {
this.sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
return this.sdf.format(new Date());
}
private String addZero(String str, int len) {
StringBuffer s = new StringBuffer();
s.append(str);
while (s.length() < len) {
s.insert(0, "0");
}
return s.toString();
}
public static void main(String args[]) {
System.out.println(new IPTimeStamp("192.168.1.1").getIPTimeRand());
}
}
UploadAction.java:
package com.zyy.struts.action;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.zyy.struts.form.UploadForm;
import com.zyy.util.IPTimeStamp;
public class UploadAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
UploadForm uploadForm = (UploadForm) form;
IPTimeStamp ips = new IPTimeStamp(request.getRemoteAddr());
// 文件名
String fileName = ips.getIPTimeRand()
+ "."
+ uploadForm.getPhoto().getFileName().split("\\.")[uploadForm
.getPhoto().getFileName().split("\\.").length - 1];
// 输出路径
File outFile = new File(super.getServlet().getServletContext()
.getRealPath("/")
+ "upload" + File.separator + fileName);
// 存放图片的文件夹
File file = new File(super.getServlet().getServletContext()
.getRealPath("/")
+ "upload");
if (!file.exists()) {
file.mkdir();
}
InputStream input = uploadForm.getPhoto().getInputStream();
OutputStream output = new FileOutputStream(outFile);
byte data[] = new byte[1024];
int temp = 0;
while ((temp = input.read(data, 0, 1024)) != -1) {
output.write(data);
}
output.close();
input.close();
return null;
}
}
struts-config.xml:
"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">
name="uploadForm" scope="request" type="com.zyy.struts.action.UploadAction">
name="uploadForm" scope="request" type="com.zyy.struts.action.UploadAction">
由于我保存在的是super.getServlet().getServletContext().getRealPath("/")+ "upload"
这是虚拟目录的真实路径的upload文件夹下。
由此可见,在Struts中的文件上传原理和FileUpload一样,但是Struts进行了包装,所以用起来明显比单独用FileUpload组件方便了许多。
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