struts2上传图片到服务器并存路径到数据库出错
- HTML code
<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
Action：
- Java code
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) [color=#FF0000]File destFile = new File(address,this.getFileFileName().get(i)+dateTime);[/color] [color=#FF0000]this.getFileFileName().get(i)取不到上传文件的名字[/color] //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:
- XML code
<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:
- XML code
<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
[解决办法]
参考： http://blog.csdn.net/voyage_mh1987/article/details/5884966
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
- HTML code
<?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>
[解决办法]
楼主，你好
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
[解决办法]
关于报NULL错误
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)
[解决办法]