错误状态500源不为空struts2文件上传不起作用

Question

仅是我想将文件上传到数据库和文本字段字符串 我想如果用户不选择任何文件，则只有文本字段字符串将保存在数据库中。并且一些默认文件名将保存在fileuploader的列中。

这是我的要求

jsp code

<form class="login" method="post" enctype="multipart/form-data" action="department">
            <p class="lead">Add Department</p>
            <div class="form-group">
                <input autocomplete="off" type="text" name="depname" class="required form-control" placeholder="Department Name">
            </div>
            <div class="form-group">

                            <input type="file" name="userImage" label="Choose File" size="40">

            </div>
            <div class="form-group">

                <input type="submit" class="btn btn-primary btn-lg1 btn-block" name="submit" value="Add">
            </div>
                    <s:actionmessage />
                    <s:actionerror />
               </form>

动作类department.java

package myweb;




import java.io.File;
import java.io.FileInputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;

import com.opensymphony.xwork2.ActionSupport;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.sql.SQLException;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.io.FileUtils;
import static org.apache.struts2.ServletActionContext.getServletContext;

public class department extends ActionSupport {

    private File userImage;
    private String userImageContentType;
    private String userImageFileName;
    private HttpServletRequest servletRequest;

    public File getUserImage() {
        return userImage;
    }

    public void setUserImage(File userImage) {
        this.userImage = userImage;
    }

    public String getUserImageContentType() {
        return userImageContentType;
    }

    public void setUserImageContentType(String userImageContentType) {
        this.userImageContentType = userImageContentType;
    }

    public String getUserImageFileName() {
        return userImageFileName;
    }

    public void setUserImageFileName(String userImageFileName) {
        this.userImageFileName = userImageFileName;
    }

    public HttpServletRequest getServletRequest() {
        return servletRequest;
    }

    public void setServletRequest(HttpServletRequest servletRequest) {
        this.servletRequest = servletRequest;
    }




    private String depname;




    public String getDepname() {
        return depname;
    }

    public void setDepname(String depname) {
        this.depname = depname;
    }



    @Override
        public String execute() throws ClassNotFoundException, SQLException, FileNotFoundException, IOException
        {
            HttpServletRequest request = null;


            String path=getServletContext().getInitParameter("path");
            String place=getServletContext().getInitParameter("place");
            String uname=getServletContext().getInitParameter("uname");
            String pass=getServletContext().getInitParameter("pass");

            try
            {
                String filename=new java.util.Date().getTime()+getUserImageFileName();
                String filePath = getServletContext().getRealPath("/")+"pics\\";
                File fileToCreate = new File(filePath,  filename);
                FileUtils.copyFile(this.userImage, fileToCreate);
                if(!userImage.exists())
                {
                    filename="default.png";
                }
                else
                {
                    Class.forName("com.mysql.jdbc.Driver");
                    Connection myconn = DriverManager.getConnection(path+place, uname, pass);
                    try

                    {
                        if(getUserImageContentType().equals("image/gif") || getUserImageContentType().equals("image/jpeg") || getUserImageContentType().equals("image/png"))
                        {
                            String query="insert into department(depname,depimage) values(?,?)";
                            PreparedStatement myst=myconn.prepareStatement(query);
                            myst.setString(1, getDepname());
                            myst.setString(2, filename);
                            if(myst.executeUpdate()>0)
                            {
                                addActionMessage("Department Added");
                                return "save";
                            }
                            else
                            {
                                addActionError("Error in Something");
                                return "error";
                            }
                        }
                        else
                        {
                            addActionError("Only Image File Is Supported");
                            return "notsupported";
                        }
                    }
                    catch(SQLException e)
                    {
                        addActionError("Error Due to "+e.getMessage());
                        return "error2";
                    }
                }

            }
            catch(ClassNotFoundException e)
            {
                addActionError("Error In Connection Due to "+e.getMessage());
                return "conn_error";
            }

        return null;


        }

}

我尝试了许多代码来解决此问题，但未成功

struts.xml




<action name="department" class="myweb.department">
               <interceptor-ref name="fileUpload">
                <param name="maximumSize">2097152</param>
                <param name="allowedTypes">image/png,image/gif,image/jpeg,image/pjpeg</param>
                </interceptor-ref>
                <interceptor-ref name="defaultStack"></interceptor-ref>
            <result name="save">add_department.jsp</result>
                        <result name="error">add_department.jsp</result>
                        <result name="error2">add_department.jsp</result>
                        <result name="conn_error">add_department.jsp</result>
                        <result name="notsupported">add_department.jsp</result>
        </action>



error logs

这是我面临的错误日志

22988 [http-nio-8080-exec-6] INFO org.apache.struts2.dispatcher.Dispatcher - Unable to find 'struts.multipart.saveDir' property setting. Defaulting to javax.servlet.context.tempdir
23499 [http-nio-8080-exec-6] ERROR org.apache.struts2.dispatcher.Dispatcher - Exception occurred during processing request: Source must not be null
java.lang.NullPointerException: Source must not be null
    at org.apache.commons.io.FileUtils.copyFile(FileUtils.java:761)
    at org.apache.commons.io.FileUtils.copyFile(FileUtils.java:731)
    at myweb.department.execute(department.java:125)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:450)
    at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:289)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:252)
    at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:167)
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)
    at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:239)
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:239)
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:325)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:161)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:325)
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
    at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
    at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:563)
    at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:434)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1156)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1539)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1495)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:748)

Answer 1

尝试在JSP中使用Struts2 taglib，例如<s:form>，<s:file>等。

我认为this page对您有所帮助。请仔细阅读。