struts2上传文件报的错

[laipi888]

2010-7-11 13:44:32 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: Struts has detected a file upload UI tag (s:file) being used without a form set to enctype 'multipart/form-data'. This is probably an error!
2010-7-11 13:44:32 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: Struts has detected a file upload UI tag (s:file) being used without a form set to method 'POST'. This is probably an error!
2010-7-11 13:44:44 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: Error setting expression 'file' with value '[Ljava.lang.String;@19f410'
ognl.MethodFailedException: Method "setFile" failed for object com.action.UploadAction@1f87254 [java.lang.NoSuchMethodException: com.action.UploadAction.setFile([Ljava.lang.String;)]
at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1265)
at ognl.OgnlRuntime.setMethodValue(OgnlRuntime.java:1454)
at ognl.ObjectPropertyAccessor.setPossibleProperty(ObjectPropertyAccessor.java:85)
at ognl.ObjectPropertyAccessor.setProperty(ObjectPropertyAccessor.java:162)
at com.opensymphony.xwork2.ognl.accessor.ObjectAccessor.setProperty(ObjectAccessor.java:28)
at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2225)
at com.opensymphony.xwork2.ognl.accessor.CompoundRootAccessor.setProperty(CompoundRootAccessor.java:65)
at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2225)
at ognl.ASTProperty.setValueBody(ASTProperty.java:127)
at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)
at ognl.SimpleNode.setValue(SimpleNode.java:301)
at ognl.Ognl.setValue(Ognl.java:737)
at com.opensymphony.xwork2.ognl.OgnlUtil.setValue(OgnlUtil.java:198)
at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:161)
at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:149)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.setParameters(ParametersInterceptor.java:276)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:187)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)

[laipi888]

<?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>

<constant name="struts.custom.il8n.resources" value="message"></constant> <!-- 定义国际化方式，将struts2内置的验证提示方式覆盖掉 “message”为自己创建的文件，且必须在src根目录下 -->
<constant name="struts.i18n.encoding" value="gbk"></constant>
<constant name="struts.multipart.saveDir" value="f:"></constant>

<package name="struts2" extends="struts-default">

<interceptors> <!-- 拦截器根节点 -->
<interceptor name="auth" class="interceptor.AuthInterceptor"></interceptor> <!-- 定义一个拦截器 -->

<interceptor name="MethodFilterInterceptor" class="interceptor.MethodFilterInteceptor"></interceptor> <!-- 对指定方法进行拦截 -->


<interceptor-stack name="default"> <!-- 定义一个拦截器栈 -->
<interceptor-ref name="auth"></interceptor-ref>
<interceptor-ref name="defaultStack"></interceptor-ref> <!-- 引用继承下来的默认拦截器 -->
</interceptor-stack>


</interceptors>



<!-- <default-interceptor-ref name="default"> --> <!-- 定义一个默认的拦截器引用 -->

<!--</default-interceptor-ref>-->

<global-results> <!-- 定义一个全局的结果 -->
<result name="login" type="redirect">/login.jsp</result>
</global-results>

<action name="login" class="com.action.LoginAction">
<result name="success">/register2.jsp</result>
<result name="input">/login.jsp</result>
<result name="false">/login.jsp</result>
</action>
<action name="pointConvert" class="com.action.PointAction">
<result name="success">/output.jsp</result>
</action>
<action name="register" class="com.action.RegisterAction" method="reg"> <!-- Action会调用“reg”这个方法 -->
<result name="success">/success.jsp</result>
<result name="input">/register2.jsp</result>

<interceptor-ref name="MethodFilterInterceptor">
<param name="includeMethods">text,execute</param> <!-- 对指定方法进行拦截 -->
<param name="excludeMethods">execute</param> <!-- 对指定方法不拦截 -->
</interceptor-ref>

<interceptor-ref name="auth"></interceptor-ref>
<interceptor-ref name="defaultStack"></interceptor-ref> <!-- 引用继承下来的默认拦截器 -->

<!--
<interceptor-ref name="auth"></interceptor-ref>
<interceptor-ref name="defaultStack"></interceptor-ref>
-->

</action>

<action name="upload" class="com.action.UploadAction">
<result name="success">/uploadfile/result.jsp</result>
</action>
</package>
</struts>

[laipi888]

UploadAction

package com.action;

import java.io.*;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class UploadAction extends ActionSupport {
private String username;
private File file;
private String fileFileName;
private String fileContentType;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public File getFile() {
return file;
}
public void setFile(File file) {
this.file = file;
}
public String getFileFileName() {
return fileFileName;
}
public void setFileFileName(String fileFileName) {
this.fileFileName = fileFileName;
}

public String getFileContentType() {
return fileContentType;
}
public void setFileContentType(String fileContentType) {
this.fileContentType = fileContentType;
}
@Override
public String execute() throws Exception {
InputStream is = new FileInputStream(file);
String path = ServletActionContext.getRequest().getRealPath("/uploadfile");
OutputStream os = new FileOutputStream(new File(path,this.getFileFileName()));
byte[] bu = new byte[1024];
int length = 0;
while((length=is.read())>0){
os.write(bu, 0, length);
}
is.close();
os.close();

return SUCCESS;
}

}

[laipi888]

upload.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>

<%@ taglib uri="/struts-tags" prefix="s" %>

<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'upload.jsp' starting page</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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->

</head>

<body>
<s:form action="upload">
<s:textfield name="username" label="username"></s:textfield><br>
<s:file name="file" label="file"></s:file><br>
<s:submit></s:submit>
</s:form>
</body>
</html>

[小爽昵称已被占用]

without a form set to enctype 'multipart/form-data'.

要设置form的enctype。

[neverloseming]

<s:form action="admin/addImageItems.do" method="post" enctype="multipart/form-data">
加上红色字体那部分

[closewbq]

[Quote=引用 5 楼 neverloseming 的回复:]
<s:form action="admin/addImageItems.do" method="post" enctype="multipart/form-data">
加上红色字体那部分
[/Quote]
错误消息提示的很明显：

警告: Struts has detected a file upload UI tag (s:file) being used without a form set to enctype 'multipart/form-data'. This is probably an error!

就是form没有设置 enctype="multipart/form-data"

[rove_life]

设置entype="multipart.form-data"。

[huangzuoyu]

我也遇到了这个麻烦了。。