<form name="addform" action="candiate/candiateadd.action" method="post" enctype ="multipart/form-data">
<input id="zhuceImage" name="upfile"type="file"/>
<input id="zhuceBimage" name="upfile" type="file"/>
<input id="zhuceName" name="candiate.candiateName" type="text"/>
</formAction：public class CandiateAction {
private Candiate candiate;
private List<File> upfile;
private List<String> fileFileName;
private List<String> fileContentType;
get set方法
public String candiateadd() throws IOException{
//得到工程保存图片的路径
String address = ServletActionContext.getServletContext().getRealPath("/images/upload");
String relateAddress = "images/upload";//保存到数据库的相对路径
System.out.println(address);
System.out.println(upfile.size());
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
String dateTime = sdf.format(new Date());
//循环上传的文件
for(int i = 0 ; i < upfile.size() ; i ++){
InputStream is = new FileInputStream(upfile.get(i)); //得到图片保存的位置(根据address来得到图片保存的路径在tomcat下的该工程里)
File destFile = new File(address,this.getFileFileName().get(i)+dateTime);
this.getFileFileName().get(i)取不到上传文件的名字
//把图片写入到上面设置的路径里
OutputStream os = new FileOutputStream(destFile);
byte[] buffer = new byte[400];
int length = 0 ;
while((length = is.read(buffer))>0){
os.write(buffer, 0, length);
}
is.close();
os.close();
}
//将上传的文件路径存入数据库
candiate.setCandiateImage(relateAddress+"/"+this.getFileFileName().get(0)+dateTime);
candiate.setCandiateBimage(relateAddress+"/"+this.getFileFileName().get(1)+dateTime);
return "index";
}
}struts.xml:<package name="candiateadd" namespace="/candiate" extends="struts-default">
<action name="candiateadd" class="com.tyut.actions.CandiateAction" method="candiateadd">
<interceptor-ref name="candiateadd">
<param name="allowedTypes">
image/bmp,image/png,image/gif,image/jpeg,image/jpg,image/x-png
</param>
</interceptor-ref>
<interceptor-ref name="defaultStack"/>
<result name="success">/index.jsp</result>
</action>
</package>web.xml:<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter> <filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>以上是我根据网上搜到的自己写的。运行出现错误，不知道为什么，希望大家能出来解释下，我是新手，希望能够解释详细点，
分立马送上。
错误的提示是这样的：
错误1：
严重: Exception starting filter struts2
Unable to load configuration. - interceptor-ref - file:/D:/Program%20Files/NetBeans%206.7.1/Apache%20Software%20Foundation/Apache%20Tomcat%206.0.18/webapps/zxtp/WEB-INF/classes/struts.xml:91:50
Caused by: Unable to load configuration. - interceptor-ref - file:/D:/Program%20Files/NetBeans%206.7.1/Apache%20Software%20Foundation/Apache%20Tomcat%206.0.18/webapps/zxtp/WEB-INF/classes/struts.xml:91:50
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418)
... 29 more
Caused by: Unable to find interceptor class referenced by ref-name candiateadd - interceptor-ref - file:/D:/Program%20Files/NetBeans%206.7.1/Apache%20Software%20Foundation/Apache%20Tomcat%206.0.18/webapps/zxtp/WEB-INF/classes/struts.xml:91:50
at com.opensymphony.xwork2.config.providers.InterceptorBuilder.constructInterceptorReference(InterceptorBuilder.java:52)
错误2：是我把struts2.xml里的<interceptor-ref name="candiateadd">
<param name="allowedTypes">
image/bmp,image/png,image/gif,image/jpeg,image/jpg,image/x-png
</param>
</interceptor-ref>
<interceptor-ref name="defaultStack"/>
去掉后运行项目提示
java.lang.NullPointerException
com.tyut.actions.CandiateAction.candiateadd(CandiateAction.java:100)
more...
该怎么解决，我是新手，希望能解释的详细点，解决后分马上送上
解决方案 »
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错误的原因：
1： 没有转码
2： 拦截器配置错误
3： 名称没有按照规范命名
4： 没哟设置流格式
5： struct版本不一直导致无法加载配置文件
6： action 配置错误或者没有对应上<?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>
<!-- developer mode convenient for Debug --> <constant name="struts.i18n.encoding" value="GBK" />
<constant name="struts.ui.theme" value="simple" />
<constant name="struts.ui.templateDir" value="template" />
<constant name="struts.ui.templateSuffix" value="ftl" />
<package name="uploadFile" extends="struts-default"> <action name="myUpload" class="com.UploadAction">
<interceptor-ref name="fileUpload">
<param name="savePath">/file</param>
<param name="maximumSize">1024000</param>
</interceptor-ref>
<interceptor-ref name="defaultStack" />
<result name="input">/index.jsp</result>
<result name="success">/showUpload.jsp</result>
</action>
<action name="download" class="com.DownLoadAction">
<!-- 设置文件名参数，由页面上传入 -->
<param name="fileName"></param>
<result name="success" type="stream">
<!-- 下载文件类型定义 -->
<param name="contentType">
application/octet-stream
</param>
<!-- 下载文件处理方法 -->
<param name="contentDisposition">
attachment;filename="${downloadChineseFileName}"
</param>
<!-- 下载文件输出流定义 -->
<param name="inputName">downloadFile</param>
<param name="bufferSize">4096</param>
</result>
</action>
</package>
</struts>
java.lang.NullPointerException
com.tyut.actions.CandiateAction.candiateadd(CandiateAction.java:100)
more...
麻烦你帮忙看下我写的代码，到底哪个地方出错了？
struts.xml:先不管上传的是什么文件，不设置拦截器<package name="candiateAdd" namespace="/candiate" extends="struts-default">
<action name="candiateAdd" class="com.tyut.actions.CandiateAction" method="candiateAdd">
<result name="success">/index.jsp</result>
</action>
</package>public class CandiateAction {
private Candiate candiate; private File[] uploadFile;//上传的文件名
private String[] contentType;
private String[] caption;
private String[] uploadFilename;
所有的get set方法。。
/**
* 拷贝文件到相应的目录下
* @param src
* @param dst
*/
private static void copy(File src, File dst) {
try {
InputStream in = null;
OutputStream out = null;
try {
in = new BufferedInputStream(new FileInputStream(src));
out = new BufferedOutputStream(new FileOutputStream(dst));
byte[] buffer = new byte[16 * 1024];
while (in.read(buffer) > 0) {
out.write(buffer);
}
} finally {
if (null != in) {
in.close();
}
if (null != out) {
out.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
public String candiateAdd() throws IOException{
//得到工程保存图片的路径
String address = ServletActionContext.getServletContext().getRealPath ("/images/upload");
String relateAddress = "images/upload";//保存到数据库的相对路径
System.out.println(address);
System.out.println(uploadFile.length);
//上面的address和uploadFile.length都能输出值。 //上传的image文件，对应uploadFile的第一个图片
File imageFile = null;
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
String dateTime = sdf.format(new Date());
String candiateImageName = dateTime+new String(uploadFilename[0]);
imageFile = new File(address+"/"+candiateImageName);
copy(this.getUploadFile()[0],imageFile);
candiate.setCandiateImage(relateAddress+"/"+candiateImageName);
//上传bimage文件对应第二个图片,本项目只需要上传两个图片
File bimageFile = null;
String dateTime1 = sdf.format(new Date());
String candiatebimageName = dateTime1+new String(uploadFilename[1]);
bimageFile = new File(address+"/"+candiatebimageName);
copy(this.getUploadFile()[1],bimageFile);
candiate.setCandiateBimage(relateAddress+"/"+candiatebimageName);
System.out.println(candiate.getCandiateImage());
return "success";
}
}jsp页面：<form name="addform" action="candiate/candiateAdd.action" method="post" enctype ="multipart/form-data">
<input id="zhuceImage" name="upfile" type="file"/>
<input id="zhuceBimage" name="upfile" type="file"/>
<input id="zhuceName" name="candiate.candiateName" type="text"/>
</form项目的jar包：
antlr-2.7.6.jar
asm-attrs.jar
asm.jar
cglib-2.1.3.jar
commons-beanutils.jar
commons-collections-2.1.1.jar
commons-collections.jar
commons-fileupload-1.2.2.jar
commons-io-2.0.1.jar
commons-lang.jar
commons-logging-1.0.4.jar
commons-logging.jar
dom4j-1.6.1.jar
ehcache-1.2.3.jar
ejb3-persistence.jar
ezmorph-1.0.6.jar
freeer-2.3.15.jar
hibernate-annotations.jar
hibernate-commons-annotations.jar
hibernate-entitymanager.jar
hibernate-validator.jar
hibernate3.jar
jaas.jar
javassist.jar
jaxen-1.1-beta-7.jar
jboss-archive-browsing.jar
jdbc2_0-stdext.jar
json-lib-2.2.3-jdk13.jar
jsonplugin-0.34.jar
jstl.jar
jta.jar
log4j-1.2.11.jar
msbase.jar
mssqlserver.jar
msutil.jar
ognl-2.7.3.jar
standard.jar
struts2-core-2.1.8.jar
xml-apis.jar
xwork-2.1.2.jar
xwork-core-2.1.6.jar
现在，专心下来看代码的人少了，而且对于新手，还有很多都不知道其中的原理，我也是最近开始学struts2的。
<input id="zhuceImage" name="upfile" type="file"/>
<input id="zhuceBimage" name="upfile" type="file"/>
注意这里的file的name值，你设的为upfile
那么Action里的绑定的upfile---》对应文件
upfileFileName---》对应名字
把这几个字段该了就行了
特别注意struts2是怎么绑定。
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
String dateTime = sdf.format(new Date());
String candiateImageName = dateTime+upfileFilename[0];
楼主记得给分哈
你jsp页面写的是这样的
<input id="zhuceImage" name="upfile" type="file"/>
<input id="zhuceBimage" name="upfile" type="file"/>
Action里
private List<File> upfile; ---》估计楼主恰好设对了
private List<String> fileFileName; ---》错，应该为upfileFileName
private List<String> fileContentType; ---》错，应该为upfileContentType
this.getFileFileName().get(i)当然报NULL错误了应该为this.getUpfileFileName.get(i)