0
我收到java.io.IOException：java.lang.NullPointerException：參數錯誤：參數url爲null。Primefaces 6和Content Flow錯誤
XHTML文件：
<p:dataTable var="vehicleTransactionList" value="#{viewCompanyManagedBean.vehicleTransactionList}">
<p:column headerText="#{messages.saptrn}">
<h:outputText value="#{vehicleTransactionList.vehicleTransactionId}" />
</p:column>
<p:column headerText="#{messages.scalepics}"> \t
<p:contentFlow value="#{viewCompanyManagedBean.vehicleTransactionList}" var="newimage">
<p:graphicImage value="#{newimage.imageLocations}" styleClass="content" />
<div class="caption">#{newimage.imageLocations}</div>
</p:contentFlow>
</p:column>
</p:dataTable>的錯誤是在第二列＃{newimage.imageLocations}
管Bean：
package com.company.beans;
import com.company.entities.Company;
import com.company.entities.Scale;
import com.company.entities.ScaleMeasurement;
import com.company.entities.VehicleTransaction;
import com.company.services.db.ScaleMeasurementService;
import com.company.services.db.ScaleService;
import java.io.IOException;
import java.net.UnknownHostException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.PostConstruct;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import javax.faces.bean.ViewScoped;
import javax.faces.context.FacesContext;
import javax.servlet.http.HttpServletRequest;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.primefaces.event.SelectEvent;
import sunw.io.Serializable;
@SuppressWarnings("deprecation")
@ManagedBean
@ViewScoped
public class ViewCompanyManagedBean implements Serializable {
\t static Logger webRecySys = null;
static {
\t webRecySys = Logger.getLogger("com.company.webRecySys"); \t
}
\t
\t public ViewCompanyManagedBean() {
\t \t
\t }
\t @PostConstruct
\t public void populateCompanyData() {
\t \t prepareData(new Date());
\t \t
images = new ArrayList<String>();
for (int i = 1; i <= 7; i++) {
images.add("file_" + i + ".jpg");
}
\t }
\t @PostConstruct
\t public void onDateSelect(SelectEvent event) throws UnknownHostException {
\t \t SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy");
\t \t String date = format.format(event.getObject());
\t \t try {
\t \t \t Date selectedDate = format.parse(date);
\t \t \t prepareData(selectedDate); \t \t \t \t \t \t \t
\t \t } catch (ParseException e) {
\t \t \t e.printStackTrace();
\t \t }
\t \t FacesContext facesContext = FacesContext.getCurrentInstance();
\t \t facesContext.addMessage(null,new FacesMessage(FacesMessage.SEVERITY_INFO, "Date Selected",format.format(event.getObject())));
\t }
\t
\t private void prepareData(Date forData) {
\t \t ScaleService ss = new ScaleService();
\t \t ScaleMeasurementService sms = new ScaleMeasurementService();
\t \t Scale right = ss.find(getRightScale());
\t \t Scale left = ss.find(getLeftScale());
\t \t this.measurements = sms.getMeasurementForScale(right,forData);
\t \t this.measurements.addAll(sms.getMeasurementForScale(left,forData));
\t \t SimpleDateFormat sdf = new SimpleDateFormat("ddMMyyyy");
\t \t this.fileName = "Shredder_Measurements_"+ sdf.format(forData);
\t \t for (ScaleMeasurement s : measurements) {
\t \t \t if (s.getScale().getScaleId().equalsIgnoreCase(rightScale)) {
\t \t \t \t this.rightScaleMeasurementSum += s.getMeasurement();
\t \t \t }
\t \t \t if (s.getScale().getScaleId().equalsIgnoreCase(leftScale)) {
\t \t \t \t this.leftScaleMeasurementSum += s.getMeasurement();
\t \t \t }
\t \t }
\t \t vehicleTransactionList = getVehicleTransactionList(sdf.format(forData) , (HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest());
\t }
\t
\t
\t private ArrayList<VehicleTransaction> getVehicleTransactionList(String fileDateFormat,HttpServletRequest request) {
\t \t
\t \t ResourceBundle resourceb = ResourceBundle.getBundle("com.company.messages.image");
\t \t String imgRootPath = resourceb.getString("imagerootpath");
\t \t
\t \t ArrayList<VehicleTransaction> images = new ArrayList<VehicleTransaction>();
\t \t String name = request.getLocalName();
\t \t if (name != null) {
\t \t \t if (name.startsWith("0")) {
\t \t \t \t name = "localhost";
\t \t \t }
\t \t }
\t \t else {
\t \t \t name = "localhost";
\t \t }
\t \t Scale scale = new ScaleService().find("01");
\t \t Company c = new ScaleService().getCompanyFromScale(scale);
\t \t String companyName = c.getCompanyName().trim().replace(" ", "_"); \t \t
\t \t String URL = "http://"+name+":"+request.getLocalPort()+imgRootPath+"/"+companyName+"/"+fileDateFormat+"/";
\t \t
\t \t ArrayList<String> picUrls = new ArrayList<String>(); \t \t
\t \t Document doc;
\t \t try {
\t \t \t doc = Jsoup.connect(URL).get();
\t \t \t for (Element file : doc.select("a")) {
\t \t \t \t String urlPathToFile = file.attr("href");
\t \t \t \t String fileName = file.text();
\t \t \t \t if (urlPathToFile.endsWith(".jpg") && fileName.endsWith(".jpg")) {
\t \t \t \t \t String picUrl = "http://"+name+":"+request.getLocalPort()+imgRootPath+"/"+companyName+"/"+fileDateFormat+"/"+fileName;
\t \t \t \t \t
\t \t \t \t \t picUrls.add(picUrl); \t \t \t \t \t
\t \t \t \t }
\t \t }
\t \t } catch (IOException e) {
\t \t \t webRecySys.logp(Level.WARNING, this.getClass().getCanonicalName() , "getAllImagesList", "Cannot get list of Images: "+e.getMessage());
\t \t } \t
\t \t ArrayList<String> vehicleTransactionIdList = getVehicleTransactionIds(picUrls);
\t \t
\t \t for (String vehicleTransactionId : vehicleTransactionIdList) {
\t \t \t ArrayList<String> imagesForTransaction = getVehicleTransaction(vehicleTransactionId,picUrls);
\t \t \t VehicleTransaction s = new VehicleTransaction(imagesForTransaction, vehicleTransactionId);
\t \t \t images.add(s);
\t \t }
\t \t
\t \t return images;
\t }
\t private ArrayList<String> getVehicleTransaction(String vehicleTransactionId,ArrayList<String> picUrls) {
\t \t ArrayList<String> imagesForTransaction = new ArrayList<String>();
\t \t for (String url : picUrls) {
\t \t \t if (url.contains(vehicleTransactionId)) {
\t \t \t \t imagesForTransaction.add(url);
\t \t \t }
\t \t }
\t \t return imagesForTransaction;
\t }
\t
\t private ArrayList<String> getVehicleTransactionIds(ArrayList<String> picUrls) {
\t \t ArrayList<String> vehicleTransactionIds = new ArrayList<String>();
\t \t for (String pic : picUrls) {
\t \t \t String vehicleTransactionId = pic.substring(pic.lastIndexOf("/")+1);
\t \t \t vehicleTransactionId = vehicleTransactionId.substring(0,vehicleTransactionId.indexOf("_"));
\t \t \t if (!existsInArl(vehicleTransactionId,vehicleTransactionIds)) {
\t \t \t \t vehicleTransactionIds.add(vehicleTransactionId);
\t \t \t }
\t \t }
\t \t return vehicleTransactionIds;
\t }
\t private boolean existsInArl (String s , ArrayList<String> arl) {
\t \t boolean exists = false;
\t \t for (String c : arl) {
\t \t \t if (c.equalsIgnoreCase(s)) {
\t \t \t \t exists = true;
\t \t \t }
\t \t }
\t \t return exists;
\t }
\t
\t public Date getDate() {
\t \t return date;
\t }
\t public void setDate(Date date) {
\t \t this.date = date;
\t }
\t public List<ScaleMeasurement> getMeasurements() {
\t \t return measurements;
\t }
\t public void setMeasurements(List<ScaleMeasurement> measurements) {
\t \t this.measurements = measurements;
\t }
\t public String getFileName() {
\t \t return fileName;
\t }
\t public void setFileName(String fileName) {
\t \t this.fileName = fileName;
\t }
\t public List<String> getImages() {
\t \t return images;
\t }
\t public void setImages(List<String> images) {
\t \t this.images = images;
\t } \t
\t public String getRightScale() {
\t \t return rightScale;
\t }
\t public void setRightScale(String rightScale) {
\t \t this.rightScale = rightScale;
\t }
\t public String getLeftScale() {
\t \t return leftScale;
\t }
\t public void setLeftScale(String leftScale) {
\t \t this.leftScale = leftScale;
\t }
\t public int getRightScaleMeasurementSum() {
\t \t return rightScaleMeasurementSum;
\t }
\t public void setRightScaleMeasurementSum(int rightScaleMeasurementSum) {
\t \t this.rightScaleMeasurementSum = rightScaleMeasurementSum;
\t }
\t public int getLeftScaleMeasurementSum() {
\t \t return leftScaleMeasurementSum;
\t }
\t public void setLeftScaleMeasurementSum(int leftScaleMeasurementSum) {
\t \t this.leftScaleMeasurementSum = leftScaleMeasurementSum;
\t }
\t public ArrayList<VehicleTransaction> getVehicleTransactionList() {
\t \t return vehicleTransactionList;
\t }
\t public void setVehicleTransactionList(
\t \t \t ArrayList<VehicleTransaction> vehicleTransactionList) {
\t \t this.vehicleTransactionList = vehicleTransactionList;
\t }
\t // Used for Calendar
\t private Date date;
\t // Used for Shredder Measurements \t
\t private List<ScaleMeasurement> measurements = new ArrayList<ScaleMeasurement>();
\t private String fileName;
\t private String rightScale = "02";
\t private String leftScale = "03";
\t private int rightScaleMeasurementSum;
\t private int leftScaleMeasurementSum;
\t
\t // Used for Pictures
private List<String> images;
private ArrayList<VehicleTransaction> vehicleTransactionList = new ArrayList<VehicleTransaction>();
\t private static final long serialVersionUID = 7449888248791054139L;
}VehicleTransaction POJO的：
package com.company.entities;
import java.util.ArrayList;
public class VehicleTransaction {
\t public VehicleTransaction() {
\t \t
\t }
\t public VehicleTransaction(ArrayList<String> imageLocations, String vehicleTransactionId) {
\t \t super();
\t \t this.imageLocations = imageLocations;
\t \t this.vehicleTransactionId = vehicleTransactionId;
\t }
\t public ArrayList<String> getImageLocations() {
\t \t return imageLocations;
\t }
\t public void setImageLocations(ArrayList<String> imageLocations) {
\t \t this.imageLocations = imageLocations;
\t }
\t public String getVehicleTransactionId() {
\t \t return vehicleTransactionId;
\t }
\t public void setVehicleTransactionId(String vehicleTransactionId) {
\t \t this.vehicleTransactionId = vehicleTransactionId;
\t }
\t private ArrayList<String> imageLocations;
\t private String vehicleTransactionId;
}什麼是我的錯？
護理添加一些評論什麼該區別是什麼？所以其他人不必做手動'差異' – Kukeltje