动态FormBean实现文件上传（转）
主题： 使用动态的FormBean实现文件上传
开发环境: MyEclipse 5.03
运行环境: Tomcat 5.5.17
步骤：
1. 创建Web项目 uploadDemo,并在WebRoot中创建文件夹photo
2.创建JSP文件: registerUser.jsp
<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>
<html:html lang="true">
<head>
<html:base />
<title>registerUser.jsp</title>
</head>
<body>
<html:form action="/user.do?method=register" method="POST" enctype="multipart/form-data">
userId : <html:text property="userId"/><br/>
salary : <html:text property="salary"/><br/>
<html:multibox property="hob" value="Computer" />Computer
<html:multibox property="hob" value="Ball" />Ball
<html:multibox property="hob" value="Book" />Book<br>
<html:checkbox property="hob" value="talk">Talk</html:checkbox><br>
<html:file property="file"></html:file>
<br>
<html:submit/><html:cancel/>
</html:form>
</body>
</html:html>
3. 创建动态FormBean:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">
<struts-config>
<data-sources />
<form-beans >
<form-bean name="userForm" type="org.apache.struts.validator.DynaValidatorForm">
<form-property name="hob" type="java.lang.String[]" />
<form-property name="userId" type="java.lang.String" />
<form-property name="file" type="org.apache.struts.upload.FormFile" />
<form-property name="salary" type="java.lang.Double" />
</form-bean>
</form-beans>
<global-exceptions />
<global-forwards >
<forward name="success" path="/success.jsp" />
<forward name="failed" path="/failed.jsp" />
</global-forwards>
<action-mappings >
<action
attribute="userForm"
input="/registerUser.jsp"
name="userForm"
parameter="method"
path="/user"
scope="request"
type="com.sunfengwei.upload.struts.action.UserAction"
validate="false" />
</action-mappings>
<message-resources parameter="com.sunfengwei.upload.struts.ApplicationResources" />
</struts-config>
4. Action类 UserAction
package com.sunfengwei.upload.struts.action;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.actions.DispatchAction;
import org.apache.struts.upload.FormFile;
import org.apache.struts.util.ModuleException;
import org.apache.struts.validator.DynaValidatorForm;
/**
* MyEclipse Struts
* Creation date: 04-17-2007
*
* XDoclet definition:
* @struts.action path="/user" name="userForm" input="/registerUser.jsp" parameter="method" scope="request" validate="true"
*/
public class UserAction extends DispatchAction {
/*
* Generated Methods
*/
/**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
DynaValidatorForm userForm = (DynaValidatorForm) form;// TODO Auto-generated method stub
String userId=userForm.getString("userId");
double salary=Double.parseDouble(userForm.get("salary").toString());
//由于动态FormBean中hob是数组,所以要使用getStrings()
String []hob=userForm.getStrings("hob");
//根据虚拟路径取服务器上的物理路径
String dir=servlet.getServletContext().getRealPath("/photo");
FormFile file=(FormFile)userForm.get("file");
InputStream streamIn;
try {
streamIn = file.getInputStream();
OutputStream streamOut=new FileOutputStream(dir+"/"+ userId+".jpg"); //file.getFileName());//
int bytesRead=0;
byte[] buffer=new byte[8192];
while((bytesRead=streamIn.read(buffer,0,8192))!=-1)
{
streamOut.write(buffer,0,bytesRead);
}
streamOut.close();
streamIn.close();
} catch (FileNotFoundException e) {
} catch (IOException e) {
// TODO Auto-generated catch block
}
file.destroy();
//System.out.println(userId);
/** 此处可以调用相关的JavaBean将用户信息持久化 **/
//假设上面的代码能够正确执行,在转到目标页是显示一个提示消息,
ActionMessages msgs=new ActionMessages();
msgs.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("success.msg"));
this.saveMessages(request,msgs);
this.saveErrors(request,msgs);
return mapping.findForward("success");
}
}
5. JSP文件: success.jsp
<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>
<html:html lang="true">
<head>
<html:base />
</head>
<body>
This a struts page. <br>
<html:errors/>
<hr>
<html:messages id="m" message="true">
<bean:write name="m"/>
</html:messages>
</body>
</html:html>
开发环境: MyEclipse 5.03
运行环境: Tomcat 5.5.17
步骤：
1. 创建Web项目 uploadDemo,并在WebRoot中创建文件夹photo
2.创建JSP文件: registerUser.jsp
<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>
<html:html lang="true">
<head>
<html:base />
<title>registerUser.jsp</title>
</head>
<body>
<html:form action="/user.do?method=register" method="POST" enctype="multipart/form-data">
userId : <html:text property="userId"/><br/>
salary : <html:text property="salary"/><br/>
<html:multibox property="hob" value="Computer" />Computer
<html:multibox property="hob" value="Ball" />Ball
<html:multibox property="hob" value="Book" />Book<br>
<html:checkbox property="hob" value="talk">Talk</html:checkbox><br>
<html:file property="file"></html:file>
<br>
<html:submit/><html:cancel/>
</html:form>
</body>
</html:html>
3. 创建动态FormBean:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">
<struts-config>
<data-sources />
<form-beans >
<form-bean name="userForm" type="org.apache.struts.validator.DynaValidatorForm">
<form-property name="hob" type="java.lang.String[]" />
<form-property name="userId" type="java.lang.String" />
<form-property name="file" type="org.apache.struts.upload.FormFile" />
<form-property name="salary" type="java.lang.Double" />
</form-bean>
</form-beans>
<global-exceptions />
<global-forwards >
<forward name="success" path="/success.jsp" />
<forward name="failed" path="/failed.jsp" />
</global-forwards>
<action-mappings >
<action
attribute="userForm"
input="/registerUser.jsp"
name="userForm"
parameter="method"
path="/user"
scope="request"
type="com.sunfengwei.upload.struts.action.UserAction"
validate="false" />
</action-mappings>
<message-resources parameter="com.sunfengwei.upload.struts.ApplicationResources" />
</struts-config>
4. Action类 UserAction
package com.sunfengwei.upload.struts.action;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.actions.DispatchAction;
import org.apache.struts.upload.FormFile;
import org.apache.struts.util.ModuleException;
import org.apache.struts.validator.DynaValidatorForm;
/**
* MyEclipse Struts
* Creation date: 04-17-2007
*
* XDoclet definition:
* @struts.action path="/user" name="userForm" input="/registerUser.jsp" parameter="method" scope="request" validate="true"
*/
public class UserAction extends DispatchAction {
/*
* Generated Methods
*/
/**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
DynaValidatorForm userForm = (DynaValidatorForm) form;// TODO Auto-generated method stub
String userId=userForm.getString("userId");
double salary=Double.parseDouble(userForm.get("salary").toString());
//由于动态FormBean中hob是数组,所以要使用getStrings()
String []hob=userForm.getStrings("hob");
//根据虚拟路径取服务器上的物理路径
String dir=servlet.getServletContext().getRealPath("/photo");
FormFile file=(FormFile)userForm.get("file");
InputStream streamIn;
try {
streamIn = file.getInputStream();
OutputStream streamOut=new FileOutputStream(dir+"/"+ userId+".jpg"); //file.getFileName());//
int bytesRead=0;
byte[] buffer=new byte[8192];
while((bytesRead=streamIn.read(buffer,0,8192))!=-1)
{
streamOut.write(buffer,0,bytesRead);
}
streamOut.close();
streamIn.close();
} catch (FileNotFoundException e) {
} catch (IOException e) {
// TODO Auto-generated catch block
}
file.destroy();
//System.out.println(userId);
/** 此处可以调用相关的JavaBean将用户信息持久化 **/
//假设上面的代码能够正确执行,在转到目标页是显示一个提示消息,
ActionMessages msgs=new ActionMessages();
msgs.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("success.msg"));
this.saveMessages(request,msgs);
this.saveErrors(request,msgs);
return mapping.findForward("success");
}
}
5. JSP文件: success.jsp
<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>
<html:html lang="true">
<head>
<html:base />
</head>
<body>
This a struts page. <br>
<html:errors/>
<hr>
<html:messages id="m" message="true">
<bean:write name="m"/>
</html:messages>
</body>
</html:html>
应用于：
http://hi.baidu.com/hhayy7758/blog/item/7dbfd60a756a5f38b1351d93.html