struts2文件上傳
通過2種方式模擬單個文件上傳，效果如下所示
開發步驟如下：
1、新建一個web工程，導入struts2上傳文件所需jar，如下圖
目錄結構
2、新建Action
第一種方式
package com.ljq.action;
import java.io.File;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings("serial")
publicclass UploadAction extends ActionSupport{
private File p_w_picpath; //上傳的文件
private String p_w_picpathFileName; //文件名稱
private String p_w_picpathContentType; //文件類型
public String execute() throws Exception {
String realpath = ServletActionContext.getServletContext().getRealPath("/p_w_picpaths");
//D:\apache-tomcat-6.0.18\webapps\struts2_upload\p_w_picpaths
System.out.println("realpath: "+realpath);
if (p_w_picpath !=null) {
File savefile =new File(new File(realpath), p_w_picpathFileName);
if (!savefile.getParentFile().exists())
savefile.getParentFile().mkdirs();
FileUtils.copyFile(p_w_picpath, savefile);
ActionContext.getContext().put("message", "文件上傳成功");
}
return"success";
}
public File getImage() {
return p_w_picpath;
}
publicvoid setImage(File p_w_picpath) {
this.p_w_picpath = p_w_picpath;
}
public String getImageFileName() {
return p_w_picpathFileName;
}
publicvoid setImageFileName(String p_w_picpathFileName) {
this.p_w_picpathFileName = p_w_picpathFileName;
}
public String getImageContentType() {
return p_w_picpathContentType;
}
publicvoid setImageContentType(String p_w_picpathContentType) {
this.p_w_picpathContentType = p_w_picpathContentType;
}
}
第二種方式
package com.ljq.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings("serial")
publicclass UploadAction2 extends ActionSupport {
// 封裝上傳文件域的屬性
private File p_w_picpath;
// 封裝上傳文件類型的屬性
private String p_w_picpathContentType;
// 封裝上傳文件名的屬性
private String p_w_picpathFileName;
// 接受依賴注入的屬性
private String savePath;
@Override
public String execute() {
FileOutputStream fos =null;
FileInputStream fis =null;
try {
// 建立文件輸出流
System.out.println(getSavePath());
fos =new FileOutputStream(getSavePath() +"\\"+ getImageFileName());
// 建立文件上傳流
fis =new FileInputStream(getImage());
byte[] buffer =newbyte[1024];
int len =0;
while ((len = fis.read(buffer)) >0) {
fos.write(buffer, 0, len);
}
} catch (Exception e) {
System.out.println("文件上傳失敗");
e.printStackTrace();
} finally {
close(fos, fis);
}
return SUCCESS;
}
/**
* 返回上傳文件的保存位置
*
* @return
*/
public String getSavePath() throws Exception{
return ServletActionContext.getServletContext().getRealPath(savePath);
}
publicvoid setSavePath(String savePath) {
this.savePath = savePath;
}
public File getImage() {
return p_w_picpath;
}
publicvoid setImage(File p_w_picpath) {
this.p_w_picpath = p_w_picpath;
}
public String getImageContentType() {
return p_w_picpathContentType;
}
publicvoid setImageContentType(String p_w_picpathContentType) {
this.p_w_picpathContentType = p_w_picpathContentType;
}
public String getImageFileName() {
return p_w_picpathFileName;
}
publicvoid setImageFileName(String p_w_picpathFileName) {
this.p_w_picpathFileName = p_w_picpathFileName;
}
privatevoid close(FileOutputStream fos, FileInputStream fis) {
if (fis !=null) {
try {
fis.close();
} catch (IOException e) {
System.out.println("FileInputStream關閉失敗");
e.printStackTrace();
}
}
if (fos !=null) {
try {
fos.close();
} catch (IOException e) {
System.out.println("FileOutputStream關閉失敗");
e.printStackTrace();
}
}
}
}
struts.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<!-- 該屬性指定需要Struts2處理的請求後綴，該屬性的默認值是action，即所有匹配*.action的請求都由Struts2處理。
如果用戶需要指定多個請求後綴，則多個後綴之間以英文逗號（,）隔開。 -->
<constant name="struts.action.extension" value="do"/>
<!-- 設置瀏覽器是否緩存靜態內容,默認值爲true(生產環境下使用),開發階段最好關閉 -->
<constant name="struts.serve.static.browserCache" value="false"/>
<!-- 當struts的配置文件修改後,系統是否自動重新加載該文件,默認值爲false(生產環境下使用),開發階段最好打開 -->
<constant name="struts.configuration.xml.reload" value="true"/>
<!-- 開發模式下使用,這樣可以打印出更詳細的錯誤信息 -->
<constant name="struts.devMode" value="true"/>
<!-- 默認的視圖主題 -->
<constant name="struts.ui.theme" value="simple"/>
<!--<constant name="struts.objectFactory" value="spring"/>-->
<!--解決亂碼 -->
<constant name="struts.i18n.encoding" value="UTF-8"/>
<!-- 指定允許上傳的文件最大字節數。默認值是2097152(2M) -->
<constant name="struts.multipart.maxSize" value="10701096"/>
<!-- 設置上傳文件的臨時文件夾,默認使用javax.servlet.context.tempdir -->
<constant name="struts.multipart.saveDir " value="d:/tmp"/>
<package name="upload" namespace="/upload"extends="struts-default">
<action name="*_upload"class="com.ljq.action.UploadAction" method="{1}">
<result name="success">/WEB-INF/page/message.jsp</result>
</action>
</package>
<package name="upload2"extends="struts-default">
<action name="upload2"class="com.ljq.action.UploadAction2" method="execute">
<!-- 動態設置savePath的屬性值 -->
<param name="savePath">/p_w_picpaths</param>
<result name="success">/WEB-INF/page/message.jsp</result>
<result name="input">/upload/upload.jsp</result>
<interceptor-ref name="fileUpload">
<!-- 文件過濾 -->
<param name="allowedTypes">p_w_picpath/bmp,p_w_picpath/png,p_w_picpath/gif,p_w_picpath/jpeg</param>
<!-- 文件大小, 以字節爲單位 -->
<param name="maximumSize">1025956</param>
</interceptor-ref>
<!-- 默認攔截器必須放在fileUpload之後，否則無效 -->
<interceptor-ref name="defaultStack"/>
</action>
</package>
</struts>
上傳表單頁面
<%@ page language="java"import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>文件上傳</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
</head>
<body>
<!-- ${pageContext.request.contextPath}/upload/execute_upload.do-->
<!-- ${pageContext.request.contextPath}/upload2/upload2.do-->
<form action="${pageContext.request.contextPath}/upload2/upload2.do"
enctype="multipart/form-data" method="post">
文件:<input type="file" name="p_w_picpath">
<input type="submit" value="上傳"/>
</form>
<br/>
<s:fielderror />
</body>
</html>
顯示結果頁面
<%@ page language="java"import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>上傳成功</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
</head>
<body>
上傳成功！
<br/><br/>
<!-- ${pageContext.request.contextPath} tomcat部署路徑，
如：D:\apache-tomcat-6.0.18\webapps\struts2_upload\ -->
<img src="${pageContext.request.contextPath}/<s:property value="'p_w_picpaths/'+p_w_picpathFileName"/>">
<s:debug></s:debug>
</body>
</html>