java中的接口是类吗
201
2023-07-02
java Struts2框架下实现文件上传功能
本文实例为大家分享了Struts2框架实现文件上传的方法,供大家参考,具体内容如下
struts2的配置过程
(1)在项目中加入jar包
(2)web.xml中filter(过滤器)的配置
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/iKAFnweb-app_2_5.xsd"> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/iKAFnweb-app_2_5.xsd">
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
(3)struts.xml配置文件的编写
xmlnsiKAFn="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
xmlnsiKAFn="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
(4)aiKAFnction类的编写
package com.xmgc.sc.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.struts2.ServletActionContext;
public class MyUpLoadAction {
private String title;
private File upload;//与form表单中的file文件类型的名字是一样的
private String uploadContentType;//前缀必须要是上面的upload
private String uploadFileName;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public File getUpload() {
return upload;
}
public void setUpload(File upload) {
this.upload = upload;
}
public String getUploadContentType() {
return uploadContentType;
}
public void setUploadContentType(String uploadContentType) {
this.uploadContentType = uploadContentType;
}
public String getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName;
}
/* public String getSavePath() {
//ServletContext cxt=ServletActionContext.getServletContext();
//String path=cxt.getRealPath("/");
//这个获取的path为:http://localhost:8080/sc
//上传以后变为E:\software\apache-tomcat-6.0.45\webapps\sc
return savePath;
}
public void setSavePath(String savePath) {
//E:\software\apache-tomcat-6.0.45\webapps\sc/myupload
this.savePath = ServletActionContext.getServletContext().getRealPath("/myupload");
}*/
public String execute() throws IOException{
System.out.println(title);//标题
System.out.println(uploadContentType);//准备上传的文件的文件类型
System.out.println(uploadFileName);//准备上传的文件的文件名,记住还有扩展名
System.out.println(upload);
String realPath=ServletActionContext.getServletContext().getRealPath("/");
Strhttp://ing path=realPath+"myupload/"+uploadFileName;
System.out.println(realPath);
System.out.println(path);
FileInputStream fis=new FileInputStream(upload);
FileOutputStream fos=new FileOutputStream(path);
byte[] bytes=new byte[1024];//定义一个1024大小的字节数组
int len=-1;//用来做标志位
while((len=fis.read(bytes))>0){
fos.write(bytes, 0, len);
}
return null;
}
}
(5)jsP页面的编写
<%@ page contentType="text/html;charset=utf-8"%>
文件名:
上传:
经过这次总结,感觉struts2框架下的单文件的上传还是非常简单的,只要获取要存储在什么地方的地址,再通过输入输出流,写到这个地址中去就行了。绝大部分工作,struts2已经帮我们做好了。
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