文件上传

最新推荐文章于 2023-08-29 20:49:08 发布

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最新推荐文章于 2023-08-29 20:49:08 发布

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分类专栏： MyFaces 文章标签： Java OS JSF Apache Ajax

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[color=red][b]Jsp页面：[/b][/color]<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@ taglib uri="http://myfaces.apache.org/tomahawk" prefix="t"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="https://ajax4jsf.dev.java.net/ajax" prefix="a4j"%>

<html>
<head>
<title>文件上传</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">
</head>

<body background="../images/back01.jpg">

<f:view>
<h:form enctype="multipart/form-data">
<h:messages globalOnly="true" styleClass="message" />
<h:panelGrid columns="3" border="0" cellspacing="5">
<h:outputLabel for="myFileId" value="File: " />
<t:inputFileUpload id="myFileId" value="#{upLoadFileBB.myFile}"
storage="file" required="true" />
<h:message for="myFileId" />
<h:outputText value=" " />
<h:commandButton value="Submit"
action="#{upLoadFileBB.processUpLoadFile}" />
<h:outputText value=" " />
</h:panelGrid>
<f:verbatim>
<p/>
</f:verbatim>

<h:panelGrid columns="2" border="0" cellspacing="5">
<h:outputText value="FileName:" />
<h:outputText value="#{upLoadFileBB.myFile.name}" />
<h:outputText value="FileSize:" />
<h:outputText value="#{upLoadFileBB.myFile.size}" />
</h:panelGrid>

</h:form>
</f:view>
</body>
</html>

[color=red][b]管理Bean:[/b][/color]

package com.order.web;

import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;

import org.apache.myfaces.custom.fileupload.UploadedFile;

public class UpLoadFileBB implements java.io.Serializable {

private UploadedFile myFile;

private String splitFullPath(String str) {
str = str.replace('\\', '/');
int index = str.lastIndexOf('/');
str = str.substring(index + 1);
return str;
}

public String processUpLoadFile() {
try {

InputStream is = new BufferedInputStream(myFile.getInputStream());
OutputStream os = new FileOutputStream("c:/"
+ splitFullPath(myFile.getName()));

upLoadFile(is,os);
os.close();
is.close();
return null;
} catch (Exception x) {
FacesMessage message = new FacesMessage(
FacesMessage.SEVERITY_FATAL, x.getClass().getName(), x
.getMessage());
FacesContext.getCurrentInstance().addMessage(null, message);
return null;
}
}

private String upLoadFile(InputStream is,OutputStream os){
int bytesRead = 0;
byte[] bufferFile = new byte[8192];
try {
while ((bytesRead = is.read(bufferFile, 0, 8192)) != -1) {
os.write(bufferFile, 0, bytesRead);// 将文件写入服务器
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "fail" ;
}
return "success" ;

}

public UploadedFile getMyFile() {
return myFile;
}

public void setMyFile(UploadedFile myFile) {
this.myFile = myFile;
}

}

[b][color=red]web.xml片段[/color][/b]

<filter>
<filter-name>MyFacesExtensionsFilter</filter-name>
<filter-class>
org.apache.myfaces.component.html.util.ExtensionsFilter
</filter-class>
<init-param>
<param-name>maxFileSize</param-name>
<param-value>20m</param-value>
</init-param>
<init-param>
<param-name>uploadThresholdSize</param-name>
<param-value>100k</param-value>
</init-param>

</filter>
<filter-mapping>
<filter-name>MyFacesExtensionsFilter</filter-name>
<url-pattern>*.faces</url-pattern>
</filter-mapping>