Struts2的上传
1、Struts2默认采用了apache commons-fileupload
2、Struts2支持三种类型的上传组件
3、需要引入commons-fileupload相关依赖包
* commons-io-1.3.2.jar
* commons-fileupload-1.2.1.jar
4、表单中需要采用POST提交方式，编码类型需要使用：multipart/form-data
5、Struts2的Action
取得文件名称->>规则：输入域的名称+固定字符串FileName
取得文件数据->>规则：File 输入域的名称
取得内容类型->>规则：输入域的名称+固定字符串ContentType
6、得到输入流，采用输出流写文件
Action类
package com.djoker.struts2;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.Action;
public class uploadAction {
private String myFileFileName;
private File myFile;
private String descContextType;
public String getMyFileFileName() {
return myFileFileName;
}
public void setMyFileFileName(String myFileFileName) {
this.myFileFileName = myFileFileName;
}
public File getMyFile() {
return myFile;
}
public void setMyFile(File myFile) {
this.myFile = myFile;
}
public String getDescContextType() {
return descContextType;
}
public void setDescContextType(String descContextType) {
this.descContextType = descContextType;
}
public String execute() throws Exception {
System.out.println(myFileFileName);
InputStream is = null;
OutputStream os = null;
try{
is = new BufferedInputStream(new FileInputStream(myFile));
os = new BufferedOutputStream(new FileOutputStream(ServletActionContext.getServletContext().getRealPath("upload") + "/" + myFileFileName));
byte[] ByteBuffer = new byte[1024];
int len = 0;
while((len = is.read(ByteBuffer)) > 0){
os.write(ByteBuffer, 0, len);
}
} finally {
if(is != null){
is.close();
}
if(os != null){
os.close();
}
}
return Action.SUCCESS;
}
}
upload.jsp文件
<%@ page language="java" contentType="text/html; charset=GB18030"
pageEncoding="GB18030"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
<form action="uploadAction.action" method="post" enctype="multipart/form-data">
选择文件:<input type="file" name="myFile"><br>
文件描述:<input type="text" name="desc"><br>
<input type="submit" value="上传">
</form>
</body>
</html>
struts.xml配置中,配置最大文件上传限制
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"
"http://struts.apache.org/dtds/struts-2.1.7.dtd">
<struts>
<!-- 当struts.xml配置文件发生修改，会立刻加载，在生产环境下最好不要配置 -->
<constant name="struts.configuration.xml.reload" value="true"></constant>
<!-- 提供更加友好的提示信息 -->
<constant name="struts.devMode" value="true"></constant>
<!-- 对字符集的设置 -->
<constant name="struts.i18n.encoding" value="GB18030"/>
<!-- 配置文件上传最大限制 -->
<constant name="struts.multipart.maxSize" value="9999999999"></constant>
<package name="struts2" extends="struts-default" >
<global-results>
<result>/success.jsp</result>
<result name="error">/error.jsp</result>
</global-results>
<action name="login" class="com.djoker.struts2.LoginAction">
<result>/success.jsp</result>
<result name="error">/error.jsp</result>
</action>
<action name="uploadAction" class="com.djoker.struts2.uploadAction">
<result>/success.jsp</result>
</action>
</package>
<include file="struts-user.xml"></include>
</struts>
时间： 2024-10-03 23:53:49