小编Ond*_*žka的帖子

我正在尝试从我的JSF Web应用程序中打印pdf文档.

当我findPrinter()从main方法调用方法时,PrintServices找到了,但是当我从网页调用此方法时PrintService找不到.下面提到的代码..

 public static void main(final String[] args) throws Exception {
    PrintTest printTest = new PrintTest();
    printTest.findPrinter();
 }

 public void findPrinter() {

    PrintService[] printServices = PrinterJob.lookupPrintServices();
    System.out.println("Print Services Length :: " + printServices.length);
    for (PrintService printService : printServices) {
        System.out.println("PrintService :: " + printService);
}

   <h:form>
    <p:commandButton value="Print" action="#{printTest.findPrinter()}"/> 
   </h:form>

有什么建议...

我实现了DTO业务从TomEE到JBoss的迁移。

我有这个实体：

@NamedQueries({
@NamedQuery(name = "common.plagebusiness.plage.getAllPlages", query = "SELECT p FROM Plage p ORDER BY p.plageRgMax, p.plageCReseau") })
@Entity
@Table(name = "PLAGE")
public class Plage {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "idPlage")
    private Integer idPlage;

    @Column(name = "rgMin")
    private String plageRgMin;

使用此接口：

@Local
public interface PlagePersistenceManager {

public void importPlages(List<DetailFH55> listeEnregDetail) throws PlageBusinessException, ParseException;

}

并执行：

@Stateless(name = "common.plagebusiness.PlagePersistenceManager")
public class PlagePersistenceManagerImpl implements PlagePersistenceManager {

    private static final Logger LOGGER = Logger.getLogger(PlagePersistenceManager.class);

    @PersistenceContext(unitName = "PlageBusiness")
    private EntityManager em;

    @Override …

D3有两种设置类的方法:

selection.attr("class", (d) => d.isFoo ? "foo" : "");
selection.classed("foo", (d) => d.isFoo)

我正在寻找一种方法来添加一个按照数据命名的类.就像这样:

selection.classed((d) => "node" + d.id, true);

• 我不想使用,id因为多个DOM元素将共享该类.
• 我不想使用attr它,因为它可能会覆盖已存在的其他类.

所以我能做到

selection.attr("class", (d) => d3.select(this).attr("class") + " node" + d.id);

感觉有点hackish.

更好的解决方案？或正在进行的功能？

在 Angular 中，我有一个服务，通过constructor(...). 然而，该服务也是在某个地方通过调用构造函数创建的。因此，在参数中添加它所依赖的另一个服务将会改变 API。我想避免这种情况。

有没有办法将一个服务注入另一个服务而不将其添加到构造函数参数中？例如现场注入？

import {Inject, Injectable} from "@angular/core";
import {
    Http, Request, ConnectionBackend, RequestOptions, RequestOptionsArgs, Response, Headers,
    RequestMethod
} from "@angular/http";

import {KeycloakService} from "./keycloak.service";
import {Observable} from 'rxjs/Observable';
import {EventBusService} from "../events/event-bus.service";
import {LoadingSomethingFinishedEvent, LoadingSomethingStartedEvent} from "../events/windup-event";

@Injectable()
export class WindupHttpService extends Http {
    constructor(
        _backend: ConnectionBackend,
        _defaultOptions: RequestOptions,
        private _keycloakService: KeycloakService,
        // ----- This is what I want to avoid. -----
        private _eventBus: EventBusService,
    ) {
        super(_backend, _defaultOptions);
    }

    // -------  This is …

我查看了 stackoverflow 上有关此主题的网络搜索结果和答案，但找不到任何人有相同的问题。以下是我正在使用的启用性能日志记录的代码：

    ChromeOptions options = new ChromeOptions();

    // options.addArguments("--headless");
    options.addArguments("--remote-debugging-port=9222");
    options.addArguments("--no-sandbox");
    options.addArguments("--disable-application-cache");
    options.addArguments("--disable-notifications");
    options.addArguments("--disable-dev-shm-usage");
    options.addArguments("--disable-extensions");
    options.addArguments("--test-type");
    options.addArguments("start-maximized");
    options.addArguments("disable-infobars");
    //options.addArguments("user-data-dir=C:\\apps\\selenium\\chrome\\data");
    options.setExperimentalOption("useAutomationExtension", false);
    options.setExperimentalOption("excludeSwitches", Collections.singletonList("enable-automation"));

    // add Network logging
    LoggingPreferences logPrefs = new LoggingPreferences();
    logPrefs.enable(LogType.PERFORMANCE, Level.ALL);
    options.setCapability(CapabilityType.LOGGING_PREFS, logPrefs);

    Map<String, Object> perfLogPrefs = new HashMap<String, Object>();
    perfLogPrefs.put("enableNetwork", true);
    perfLogPrefs.put("traceCategories", "devtools.network");
    options.setExperimentalOption("perfLoggingPrefs", perfLogPrefs);

    webDriver = new ChromeDriver(options);

    webDriver.manage().deleteAllCookies();
    webDriver.manage().window().maximize();

执行时，出现如下错误：

    Starting ChromeDriver 80.0.3987.16 (320f6526c1632ad4f205ebce69b99a062ed78647-refs/branch-heads/3987@{#185}) on port 27252
    Only local connections are allowed.
    Please protect ports used by ChromeDriver and related test frameworks to …

我想计算 kotlin 中的数组列表。我所拥有的是类似的东西：

val names = listOf("apple", "apple", "orange", "orange", "banana", "pears", "grape", "apricots")

我想要的输出是这样的：

苹果 : 2 橙子 : 2 香蕉 : 1 梨 : 1 葡萄 : 1 杏子 : 1

你能帮我吗，谢谢

SVG DOM可以用JavaScript控制,所以它可以启用AJAX ......我想知道Wicket是否还有一些SVG组件.如果Wicket可以拥有纯粹xml/svg的输出格式.

快速谷歌搜索只显示Code Ranch的问题.

我最近将我的代码从jboss 4.2.3迁移到jboss 7.这有点奇怪,我无法弄清楚原因.我在处理程序类的顶部使用了注释@Controller,但它不再起作用了.当我改为使用xml时,它工作正常.有人提出一些提示吗？

web.xml中

   <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    id="WebApp_ID" version="2.5">

    <display-name>asweb</display-name>

    <filter>
      <filter-name>springCharacterEncodingFilter</filter-name>
      <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
      <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
      </init-param>
    </filter>

    <filter>
        <filter-name>openEntityManagerInViewFilter</filter-name>
        <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
    </filter>

    <filter-mapping>
      <filter-name>springCharacterEncodingFilter</filter-name>
      <url-pattern>*.do</url-pattern>
    </filter-mapping>

    <filter-mapping>
        <filter-name>openEntityManagerInViewFilter</filter-name>
        <url-pattern>*.do</url-pattern>
    </filter-mapping>

    <filter-mapping>
        <filter-name>openEntityManagerInViewFilter</filter-name>
        <url-pattern>/ws/*</url-pattern>
    </filter-mapping>

    <filter>
        <filter-name>sitemesh</filter-name>
        <filter-class>
            com.opensymphony.module.sitemesh.filter.PageFilter
        </filter-class>
    </filter>

    <filter-mapping>
        <filter-name>sitemesh</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

<servlet>
        <servlet-name>simple</servlet-name>
        <servlet-class>org.sonatype.mavenbook.web.SimpleServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>simple</servlet-name>
        <url-pattern>/simple.do</url-pattern>
    </servlet-mapping>
    <servlet>
         <servlet-name>aswebmvc</servlet-name>
         <servlet-class>org.springframework.web.servlet.DispatcherServlet
         </servlet-class>
         <load-on-startup>3</load-on-startup>
     </servlet>

     <servlet-mapping>
         <servlet-name>aswebmvc</servlet-name>
         <url-pattern>*.do</url-pattern>
     </servlet-mapping>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/applicationContext.xml
        </param-value>
    </context-param>

    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>/WEB-INF/classes/log4j.properties</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> …

我试图将我的JBOSS 5.1应用程序迁移到JBOSS 7.0.2.在管理控制台中,我选择部署 - >添加内容和我的.war并尝试启用它.我已经解决了一些问题,但是无法解决这个问题:(简而言之,在最后很长时间)

Caused by: java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener from [Module "deployment.ZaprogsProject.war:main" from Servic
e Module Loader]

我复制到JBOSS7\standalone\lib\以下文件:

spring-aop-3.0.5.RELEASE.jar
spring-asm-3.0.5.RELEASE.jar
spring-beans-3.0.5.RELEASE.jar
spring-context-3.0.5.RELEASE.jar
spring-context-support-3.0.5.RELEASE.jar
spring-core-3.0.5.RELEASE.jar
spring-expression-3.0.5.RELEASE.jar
spring-jdbc-3.0.5.RELEASE.jar
spring-orm-3.0.5.RELEASE.jar
spring-test-3.0.5.RELEASE.jar
spring-tx-3.0.5.RELEASE.jar
spring-web-3.0.5.RELEASE.jar
spring-webmvc-3.0.5.RELEASE.jar

我读过这个:https ://docs.jboss.org/author/display/AS7/How+do+I+migrate+my+application+from+AS5+or+AS6+to+AS7 (调试并解决ClassNotFoundExceptions和NoClassDefFoundErrors)但无法为我找到解决方案并仍然得到相同的错误.有人可以帮忙吗？

22:19:12,091 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-1) MSC00001: Failed to start service jboss.deployment.unit."ZaprogsProject.war".INSTALL: o
rg.jboss.msc.service.StartException in service jboss.deployment.unit."ZaprogsProject.war".INSTALL: Failed to process phase INSTALL of deployment "ZaprogsProject
.war"
        at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:121) [jboss-as-server-7.0.2.Final.jar:7.0.2.Final]
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1824) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1759) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [:1.7.0]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) …

@FacesConverter在AJAX调用期间p:selectOneMenu(Primefaces 3.0),JBoss-7.1.0.CR1b 的自定义有一个奇怪的问题.

简化的转换器看起来像这样,在这个类中没有NPE或其他异常

@FacesConverter("MyConverter")
public class MyConverter implements Converter
{      
  public Object getAsObject(FacesContext fc, UIComponent uic, String value)
  {
    logger.debug("getAsObject value: "+value);
    if (submittedValue.trim().equals("")) {return null;}
    else
    {           
      MyEjb ejb = new MyEjb();
      ejb.setId(Long.parseLong(value()));
      return ejb;  //**** alternative with return null; ****
    }
  }  
  public String getAsString(FacesContext fc, UIComponent uic, Object value)
  { 
    if (value == null || value.equals("")) {return "";}
    else
    {
        MyEjb ejb = (MyEjb)value;
        return ""+ejb.getId(); 
    }  
  }  
}

转换器用于p:selectOneMenu:

<h:form> …