Senior Pomidor's questions

在不同机器上将日期格式化为字符串时的不同含义。

Calendar date = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
sdf.setTimeZone(TimeZone.getTimeZone("GMT+03:00"));
sdf.format(date.getTime());

yyyy-MM-dd'T'HH:mm:ssXXX 应将日期作为字符串返回，其中 XXX 为 +TimeZone 即 +03:00

在一台机器上，结果是正确的2018-06-08T13:47:16+03:00，而在另一台机器上，结果是不正确的2018-06-08T13:47:16Z。

谁能说说是什么原因？

java version "1.8.0_162"
Java(TM) SE Runtime Environment (build 1.8.0_162-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.162-b12, mixed mode)

有 2 台服务器（amq1、amq2）部署了 ActiveMQ。创建队列的服务位于第三台服务器上。

在我指定的连接设置中spring.activemq.broker-url: failover:(ssl://amq1:61616,ssl://amq1:61616)

两台服务器都正常工作并且不会丢失连接。

问题是该服务首先按优先级连接到amq1，但有时会更改连接到amq2，然后又回到第一个。日志中没有消息表明与 amq1 的连接已丢失。

INFO 24003 --- [ActiveMQ Task-1] o.a.a.t.failover.FailoverTransport   : Successfully connected to ssl://amq2:61616  
INFO 24003 --- [ActiveMQ Task-1] o.a.a.t.failover.FailoverTransport       : Successfully connected to ssl://amq2:61616  
INFO 24003 --- [ActiveMQ Task-1] o.a.a.t.failover.FailoverTransport       : Successfully connected to ssl://amq1:61616 
ERROR 24003 --- [http-nio-127.0.0.1-8080-exec-4] r.o.RestExceptionHandler  : dm.exception.ActiveMQException: Failed get JMS response:  
INFO 24003 --- [ActiveMQ Task-1] o.a.a.t.failover.FailoverTransport       : Successfully connected to ssl://amq2:61616  
INFO 24003 --- [ActiveMQ Task-1] o.a.a.t.failover.FailoverTransport       : Successfully connected to ssl://amq1:61616

我怎样才能使与 amq2 的连接仅在 amq1 停止响应时才连接？

ps 如果只指定一台amq server，那么当连接消失时，spring默认尝试重连10次。我想在 10 次后更改与 amq2 的连接

不清楚为什么RHEL7控制台显示???????? 而不是权限

如您所见，用户是所有者，可以访问该文件夹，但无法正常查看权限。也不能“转到”文件夹。root 可以正常查看所有内容并且可以执行所有操作。

如果您向文件夹发出 777，则问题消失

[dm@app524 ~]$ ll
total 210004
drw-rw-rw-  4 dm dm  4096 Jul 21 15:12 config 
[dm@app524 ~]$ ll config/
ls: cannot access config/dm-notification.yml: Permission denied
ls: cannot access config/dm-dynamics.yml: Permission denied
ls: cannot access config/security: Permission denied
ls: cannot access config/dm-admin-api.yml: Permission denied
ls: cannot access config/dm-otp.yml: Permission denied
ls: cannot access config/dm-db-app.yml: Permission denied
ls: cannot access config/attachments: Permission denied
total 0
d????????? ? ? ? ?            ? attachments
-????????? ? ? ? ?            ? dm-admin-api.yml
-????????? ? ? ? ?            ? dm-db-app.yml
-????????? ? ? ? ?            ? dm-dynamics.yml
-????????? ? ? ? ?            ? dm-notification.yml
-????????? ? ? ? ?            ? dm-otp.yml
d????????? ? ? ? ?            ? security
[dm@app524 ~]$ cd config/
-bash: cd: config/: Permission denied
[dm@app524 ~]$ sudo -s
[root@app524 dm]# ll config/
total 28
drw-rw-rw- 2 dm dm 4096 Jul 21 15:12 attachments
-rw-rw-rw- 1 dm dm  139 Jul 21 15:12 dm-admin-api.yml
-rw-rw-rw- 1 dm dm  129 Jul 21 15:12 dm-db-app.yml
-rw-rw-rw- 1 dm dm  232 Jul 21 15:12 dm-dynamics.yml
-rw-rw-rw- 1 dm dm  407 Jul 21 15:12 dm-notification.yml
-rw-rw-rw- 1 dm dm  104 Jul 21 15:12 dm-otp.yml
drw-rw-rw- 2 dm dm 4096 Jul 21 15:12 security

Gitlab 页面允许您在那里发布 index.html。

有一个已部署的最新版本的 GitLab。我需要做什么才能使用我的主 DNS 并同时发布网站？

我有一个带有 4gb ram 的软呢帽 25。当我运行命令 #yum list installed 或者yum list installed > text我得到

分配 4294967296 字节内存不足！

4294967296 字节 == 4GB

执行该命令时，系统中有超过 3GB 的可用 RAM。免费交换 500Mb

在系统日志中：

[79678.056028] 内存不足：杀死进程 16669 (dnf) 得分 548 或牺牲子进程

去哪里挖？为什么4GB不够用？如何解决问题？

不输入密码就不能用ssh-key连接。

这就是我正在做的：

1. 生成了一个密钥ssh-keygen -t rsa
2. eval "$(ssh-agent -s)"
3. ssh-add .ssh/id_rsa
4. 复制.ssh/id_rsa.pub，通过腻子打开并保存私钥和公钥。
5. 更正/etc/ssh/sshd_config并重新加载sshd

使用用户名“MyUser”。

服务器我们拒绝的密钥

尝试将 authorized_keys 复制到/etc/ssh/authorized_keys 和到root，因为该服务是手动启动的。不解决问题。

告诉我我做错了什么，我怎样才能完成任务？

有一个 XML 文件 match.xml，很容易通过 curl 发送 POST 并将其添加到数据库中。

curl -F "xml=@match.xml" web_url

Java 的标准 POST 实现返回 POST 响应代码::400 错误请求

public static void sendPOST(String data) throws IOException {
    URL obj = new URL(FinalConstants.BETRADAR_UPLOAD);
    HttpURLConnection con = (HttpURLConnection) obj.openConnection();
    con.setRequestMethod("POST");
    con.setRequestProperty("User-Agent", USER_AGENT);

    // For POST only - START
    con.setDoOutput(true);
    OutputStream os = con.getOutputStream();
    os.write(data.getBytes());
    os.flush();
    os.close();
    // For POST only - END

    int responseCode = con.getResponseCode();
    System.out.println("POST Response Code :: " + responseCode);

    if (responseCode == HttpURLConnection.HTTP_OK) { //success
        BufferedReader in = new BufferedReader(new InputStreamReader(
                con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        // print result
        System.out.println(response.toString());
    } else {
        System.out.println("POST request not worked");
    }
}

并使用这样的设置返回相同的错误

        httpURLConnection.setReadTimeout(10000);
        httpURLConnection.setConnectTimeout(15000);
        httpURLConnection.setRequestMethod("POST");
        httpURLConnection.setRequestProperty("Content-Type", "text/xml");


        httpURLConnection.setDoInput(true);
        httpURLConnection.setDoOutput(true);

告诉我它是如何工作的curl -F？如何正确发送数据？

更新程序

我用 HttpClient 尝试了几个选项，它们都提供了以下内容

HttpResponseProxy{HTTP/1.1 400 错误请求 [服务器：nginx，日期：2017 年 2 月 9 日星期四 20:07:18 GMT，内容类型：应用程序/八位字节流，内容长度：0，连接：保持活动状态]}

1个选项

    HttpClient client = new DefaultHttpClient();
    HttpPost post = new HttpPost(FinalConstants.UPLOAD);
    HttpEntity entity =
            new ByteArrayEntity(data.getBytes("UTF-8"),
                    ContentType.TEXT_XML); 
    post.setEntity(entity);
    HttpResponse response = client.execute(post);
    String result = EntityUtils.toString(response.getEntity());

选项 2

InputStream in ;
StringEntity entity = new StringEntity(data, ContentType.create(
    "text/xml", Consts.UTF_8));
entity.setChunked(true);
HttpPost httppost = new HttpPost( FinalConstants.UPLOAD);

httppost.setEntity(entity);

HttpClient client = HttpClients.createDefault();
HttpResponse response = client.execute(httppost);
System.out.println(response.toString());
in=response.getEntity().getContent();
String body = IOUtils.toString(in);
System.out.println(body);

也是使用该文件的变体

builder.addBinaryBody(
    "file",
    new FileInputStream(f),
    ContentType.APPLICATION_OCTET_STREAM, // Также как и с другими типами 
    f.getName()
);

都一样，我想发送一个字符串，而不是一个文件

UPD2

public static void sendPOST(File file) throws IOException {
    try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
        final HttpPost uploadFile = new HttpPost(FinalConstants.UPLOAD);
        final HttpEntity entity = MultipartEntityBuilder
                .create()
                .addBinaryBody("xml", file).build();
        uploadFile.setEntity(entity);
        final HttpResponse response = httpClient.execute(uploadFile);
        System.out.println(EntityUtils.toString(response.getEntity()));
    }
}


java.lang.NoSuchMethodError: org.apache.http.entity.ContentType.create(Ljava/lang/String;[Lorg/apache/http/NameValuePair;)Lorg/apache/http/entity/ContentType;

    at org.apache.http.entity.mime.MultipartEntityBuilder.buildEntity(MultipartEntityBuilder.java:219)
    at org.apache.http.entity.mime.MultipartEntityBuilder.build(MultipartEntityBuilder.java:240)

如何（是否可能）在程序结束时destroy-method调用而不调用appContext.close()？

void main(){
appContext = new ClassPathXmlApplicationContext("spring.xml"); 

... blablabla...

// завершаю программу без вызова appContext.close()
}

有一个实体

public class RealEstateType {
private long customer_id;
private String name;
private Customer customerByCustomerId;

@Id
@Column(name = "customer_id", insertable = false, updatable = false)
public long getCustomerId() {
    return customer_id;
}

public void setCustomerId(long id) {
    this.customer_id = id;
}

描述了表

CREATE TABLE db.real_estate_type (
  customer_id BIGINT NOT NULL,
  name CHARACTER VARYING(255),
  FOREIGN KEY (customer_id) REFERENCES db.customer (id)
  MATCH SIMPLE ON UPDATE NO ACTION ON DELETE NO ACTION
);

哪个customer_id是FOREIGN KEY

@Column(name = "customer_id")Hibernate 在, @Column(name = "customer_id", insertable = false, updatable = false),上抛出异常@Column(name = "customer_id", insertable = true, updatable = false)

amework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [spring.xml]: Invocation of init method failed; nested exception is org.hibernate.MappingException: Repeated column in mapping for entity: hibernate.model.df.RealEstateType column: customer_id (should be mapped with insert="false" update="false")
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:756)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)

但是，如果您删除customer_id并制作 PK @Id @Column(name = "name")，那么一切正常。

如果我们离开customer_id并进行 PK @Id @Column(name = "name")，我们会得到同样的错误。

向我解释这种行为的原因以及如何解决它？

实体 DB Tibero可以没有PK。将数据库实体映射到代码（通过数据库模式生成持久性映射）需要Hibernate.

当然，您可以读取 ResultSet 并进一步处理它，但这在读取时很方便，而在写入或更新数据库中的记录时，您将不得不实现您的自行车。

你有什么建议吗？是否有其他 ORM 系统可以在没有 PK 的情况下工作？

Ps 如果没有 PC，即使更新也无法完成，因为没有可以让您准确识别记录的唯一字段。Tibero 中的所有属性都可以为空，这意味着您可以有 N 个字段为空的记录。

有一个N元素数组。

arr.parallelStream()如果核心数为 4（让它成为） ，它会运行多少个线程M？

有一个 Maven 项目，其中 pom 具有依赖项：

   <dependency>
        <groupId>ru.company</groupId>
        <artifactId>jpos</artifactId>
        <version>1.4.8.2</version>
    </dependency>
   <dependency>
        <groupId>org.jpos</groupId>
        <artifactId>jpos</artifactId>
        <version>1.9.0</version>
    </dependency>

我需要使用它的方法，org.jpos.iso.ISOMsg 正好包中ru.company包含org.jpos

如果我pom只指定 in ru.company，那么一切都会正常工作，但我还需要另一个包。我将如何解决这个问题？

ps 因为一个包包含另一个包，所以可以使用这个包。但我想知道如何处理这种情况。

大家好！将 Web 应用程序部署到 tomcat 服务器。通过intellij idea这里具有这样的特点：

<component name="ArtifactManager">
  <artifact type="exploded-war" build-on-make="true" name="webrp:war exploded">
    <output-path>$PROJECT_DIR$/target/webrp-1.0</output-path>
    <root id="root">
      <element id="directory" name="WEB-INF">
        <element id="directory" name="classes">
          <element id="module-output" name="webrp" />
        </element>
        <element id="directory" name="lib">
          <element id="library" level="project" name="Maven: com.vaadin:vaadin-server:7.6.7" />
          <element id="library" level="project" name="Maven: com.vaadin:vaadin-sass-compiler:0.9.13" />
          <element id="library" level="project" name="Maven: com.vaadin.external.flute:flute:1.3.0.gg2" />
          <element id="library" level="project" name="Maven: com.yahoo.platform.yui:yuicompressor:2.4.8" />
          <element id="library" level="project" name="Maven: rhino:js:1.7R2" />
          <element id="library" level="project" name="Maven: com.vaadin:vaadin-shared:7.6.7" />
          <element id="library" level="project" name="Maven: com.vaadin.external.streamhtmlparser:streamhtmlparser-jsilver:0.0.10.vaadin1" />
          <element id="library" level="project" name="Maven: com.vaadin.external.google:guava:16.0.1.vaadin1" />
          <element id="library" level="project" name="Maven: org.jsoup:jsoup:1.8.3" />
          <element id="library" level="project" name="Maven: com.vaadin:vaadin-push:7.6.7" />
          <element id="library" level="project" name="Maven: com.vaadin.external.atmosphere:atmosphere-runtime:2.2.7.vaadin1" />
          <element id="library" level="project" name="Maven: com.vaadin.external.slf4j:vaadin-slf4j-jdk14:1.6.1" />
          <element id="library" level="project" name="Maven: org.w3c.css:sac:1.3" />
          <element id="library" level="project" name="Maven: com.vaadin:vaadin-themes:7.6.7" />
          <element id="library" level="project" name="Maven: org.tltv.gantt:gantt-addon:0.9.3" />
        </element>
      </element>
      <element id="javaee-facet-resources" facet="webrp/web/Web" />
    </root>
  </artifact>
</component>

结果，我有一个错误：

Aug 09, 2016 9:51:40 AM com.vaadin.server.VaadinServlet serveStaticResourcesInVAADIN
INFO: Requested resource [/VAADIN/widgetsets/ru.comp.webgrp.MyAppWidgetset/ru.comp.webgrp.MyAppWidgetset.nocache.js] not found from filesystem or through class loader. Add widgetset and/or theme JAR to your classpath or add files to WebContent/VAADIN folder.

网上介绍的那些方法都不管用，有的也不适合。据我了解，问题是 vaadin 本身不编译。添加更多时出现相同的错误gwt-compiler-output

如果我们添加整个输出：

    <component name="ArtifactManager">
  <artifact type="exploded-war" build-on-make="true" name="webrp:war exploded">
    <output-path>$PROJECT_DIR$/target/webrp-1.0</output-path>
    <root id="root">
      <element id="directory" name="WEB-INF">
        <element id="directory" name="classes">
          <element id="module-output" name="webrp" />
        </element>
        <element id="directory" name="lib">
          <element id="library" level="project" name="Maven: com.vaadin:vaadin-server:7.6.7" />
          <element id="library" level="project" name="Maven: com.vaadin:vaadin-sass-compiler:0.9.13" />
          <element id="library" level="project" name="Maven: com.vaadin.external.flute:flute:1.3.0.gg2" />
          <element id="library" level="project" name="Maven: com.yahoo.platform.yui:yuicompressor:2.4.8" />
          <element id="library" level="project" name="Maven: rhino:js:1.7R2" />
          <element id="library" level="project" name="Maven: com.vaadin:vaadin-shared:7.6.7" />
          <element id="library" level="project" name="Maven: com.vaadin.external.streamhtmlparser:streamhtmlparser-jsilver:0.0.10.vaadin1" />
          <element id="library" level="project" name="Maven: com.vaadin.external.google:guava:16.0.1.vaadin1" />
          <element id="library" level="project" name="Maven: org.jsoup:jsoup:1.8.3" />
          <element id="library" level="project" name="Maven: com.vaadin:vaadin-push:7.6.7" />
          <element id="library" level="project" name="Maven: com.vaadin.external.atmosphere:atmosphere-runtime:2.2.7.vaadin1" />

.........................................

          <element id="library" level="project" name="Maven: org.codehaus.jackson:jackson-xc:1.9.12" />
        </element>
      </element>
      <element id="javaee-facet-resources" facet="webrp/web/Web" />
      <element id="directory" name="VAADIN">
        <element id="directory" name="widgetsets">
          <element id="gwt-compiler-output" facet="webrp/gwt/GWT" />
        </element>
      </element>
    </root>
  </artifact>
</component>

然后我得到一个错误：

SEVERE: Allocate exception for servlet WebrpUIServlet
java.lang.VerifyError: Bad type on operand stack
Exception Details:
  Location:
    com/vaadin/server/BootstrapHandler.setupStandaloneDocument(Lcom/vaadin/server/BootstrapHandler$BootstrapContext;Lcom/vaadin/server/BootstrapPageResponse;)V @54: invokevirtual
  Reason:
    Type 'org/jsoup/nodes/DocumentType' (current frame, stack[1]) is not assignable to 'org/jsoup/nodes/Node'
  Current Frame:
    bci: @54
    flags: { }
    locals: { 'com/vaadin/server/BootstrapHandler', 'com/vaadin/server/BootstrapHandler$BootstrapContext', 'com/vaadin/server/BootstrapPageResponse', 'org/jsoup/nodes/Document', 'org/jsoup/nodes/DocumentType' }
    stack: { 'org/jsoup/nodes/Element', 'org/jsoup/nodes/DocumentType' }
  Bytecode:
    0x0000000: 2c12 4b12 4cb6 004d 2c12 4e12 4cb6 004d
    0x0000010: 2c12 4f09 b600 502c b600 514e bb00 5259
    0x0000020: 1253 121e 121e 2db6 0054 b700 553a 042d
    0x0000030: 03b6 0056 1904 b600 5757 2db6 0058 3a05
    0x0000040: 1905 1259 b600 5a12 5b12 5cb6 005d 125e
    0x0000050: 125f b600 5d57 1905 1259 b600 5a12 5b12
    0x0000060: 60b6 005d 125e 1261 b600 5d57 2bb6 0022
    0x0000070: 3a06 013a 0719 0613 0062 b600 63c0 0062
    0x0000080: 3a08 1906 1300 64b6 0063 c000 643a 0919
    0x0000090: 08c6 003e 1909 c600 39bb 0065 59bb 002c
    0x00000a0: 59b7 002d 1906 b600 66b6 0031 1267 b600
    0x00000b0: 3113 0062 b600 68b6 0031 1269 b600 3113
    0x00000c0: 0064 b600 68b6 0031 b600 32b7 006a bf19
    0x00000d0: 08c6 000f 1908 b900 6b01 003a 07a7 004a
    0x00000e0: 1909 c600 4519 09b9 006c 0100 3a0a 190a
    0x00000f0: b600 6dc0 006e 2bb6 0018 b900 6f02 003a
    0x0000100: 07a7 0026 3a0b bb00 3d59 bb00 2c59 b700
    0x0000110: 2d12 71b6 0031 190a b600 66b6 0031 b600
    0x0000120: 3219 0bb7 0072 bf19 07c6 0019 1905 1259
    0x0000130: b600 5a12 7312 74b6 005d 125e 1907 b600
    0x0000140: 5d57 2cb6 0075 bb00 7659 2bb6 0018 2bb6
    0x0000150: 0022 b700 77b6 0078 3a0a 190a c600 1019
    0x0000160: 0512 79b6 005a 190a b600 7a57 1905 127b
    0x0000170: b600 5a12 7c12 7db6 005d 127e b600 7a57
    0x0000180: 2bb6 007f 3a0b 190b c600 6a2a 2b19 0bb6
    0x0000190: 0080 3a0c 1905 1281 b600 5a12 8212 83b6
    0x00001a0: 005d 127c 1284 b600 5d12 85bb 002c 59b7
    0x00001b0: 002d 190c b600 3112 86b6 0031 b600 32b6
    0x00001c0: 005d 5719 0512 81b6 005a 1282 1287 b600
    0x00001d0: 5d12 7c12 84b6 005d 1285 bb00 2c59 b700
    0x00001e0: 2d19 0cb6 0031 1286 b600 31b6 0032 b600
    0x00001f0: 5d57 1906 1300 88b6 0063 c000 883a 0c19
    0x0000200: 0cc6 004d 190c b900 8901 003a 0d19 0d3a
    0x0000210: 0e19 0ebe 360f 0336 1015 1015 0fa2 0031
    0x0000220: 190e 1510 323a 112a 2b19 0619 11b7 008a
    0x0000230: 3a12 1905 128b b600 5a12 7c12 8cb6 005d
    0x0000240: 128d 1912 b600 5d57 8410 01a7 ffce 1906
    0x0000250: 1300 8eb6 0063 c000 8e3a 0d19 0dc6 0054
    0x0000260: 190d b900 8f01 003a 0e19 0e3a 0f19 0fbe
    0x0000270: 3610 0336 1115 1115 10a2 0038 190f 1511
    0x0000280: 323a 122a 2b19 0619 12b7 008a 3a13 1905
    0x0000290: 1281 b600 5a12 8212 90b6 005d 127c 127d
    0x00002a0: b600 5d12 8519 13b6 005d 5784 1101 a7ff
    0x00002b0: c72d b600 263a 0e19 0e12 9112 92b6 005d
    0x00002c0: 5719 0e12 93b6 0094 57b1               
  Exception Handler Table:
    bci [238, 257] => handler: 260
  Stackmap Table:
    full_frame(@207,{Object[#310],Object[#341],Object[#346],Object[#345],Object[#397],Object[#347],Object[#316],Object[#398],Object[#399],Object[#400]},{})
    same_frame(@224)
    full_frame(@260,{Object[#310],Object[#341],Object[#346],Object[#345],Object[#397],Object[#347],Object[#316],Object[#398],Object[#399],Object[#400],Object[#316]},{Object[#401]})
    chop_frame(@295,1)
    same_frame(@322)
    append_frame(@364,Object[#398])
    append_frame(@498,Object[#398])
    full_frame(@537,{Object[#310],Object[#341],Object[#346],Object[#345],Object[#397],Object[#347],Object[#316],Object[#398],Object[#399],Object[#400],Object[#398],Object[#398],Object[#402],Object[#403],Object[#403],Integer,Integer},{})
    full_frame(@590,{Object[#310],Object[#341],Object[#346],Object[#345],Object[#397],Object[#347],Object[#316],Object[#398],Object[#399],Object[#400],Object[#398],Object[#398],Object[#402]},{})
    full_frame(@629,{Object[#310],Object[#341],Object[#346],Object[#345],Object[#397],Object[#347],Object[#316],Object[#398],Object[#399],Object[#400],Object[#398],Object[#398],Object[#402],Object[#404],Object[#403],Object[#403],Integer,Integer},{})
    full_frame(@689,{Object[#310],Object[#341],Object[#346],Object[#345],Object[#397],Object[#347],Object[#316],Object[#398],Object[#399],Object[#400],Object[#398],Object[#398],Object[#402],Object[#404]},{})

    at com.vaadin.server.VaadinServletService.createRequestHandlers(VaadinServletService.java:49)
    at com.vaadin.server.VaadinService.init(VaadinService.java:191)
    at com.vaadin.server.VaadinServlet.createServletService(VaadinServlet.java:317)
    at com.vaadin.server.VaadinServlet.init(VaadinServlet.java:223)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1238)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1151)
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:828)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    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:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

这是 WebrUI 的样子：

@Theme("valo")
@Widgetset("ru.comp.webgrp.MyAppWidgetset")
@Title(value = "Планирование")
public class WebrpUI extends UI {

    private Navigator navigator;

    @Override
    protected void init(VaadinRequest request) {
        navigator = new Navigator(this, this);
        navigator.addView("", ResourcesView.class);
        navigator.addView("resources", ResourcesView.class);
    }

    @WebServlet(urlPatterns = "/*", name = "WebrpUIServlet", asyncSupported = true)
    @VaadinServletConfiguration(ui = WebrpUI.class, productionMode = false)
    public static class WebrpUIServlet extends VaadinServlet {
    }
}

聚甲醛

        <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.0</version>
            <configuration>
                <encoding>${project.encoding}</encoding>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-resources-plugin</artifactId>
            <version>2.6</version>
            <configuration>
                <encoding>${project.encoding}</encoding>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.3</version>
            <configuration>
                <failOnMissingWebXml>false</failOnMissingWebXml>
                <!-- Exclude some unnecessary files generated by the GWT compiler. -->
                <packagingExcludes>WEB-INF/classes/VAADIN/gwt-unitCache/**,
                    WEB-INF/classes/VAADIN/widgetsets/WEB-INF/**</packagingExcludes>
            </configuration>
        </plugin>
        <plugin>
            <groupId>com.vaadin</groupId>
            <artifactId>vaadin-maven-plugin</artifactId>
            <version>${vaadin.plugin.version}</version>
            <configuration>
                <extraJvmArgs>-Xmx512M -Xss1024k</extraJvmArgs>
                <webappDirectory>${basedir}/target/classes/VAADIN/widgetsets</webappDirectory>
                <draftCompile>false</draftCompile>
                <compileReport>false</compileReport>
                <style>OBF</style>
                <strict>true</strict>
                <runTarget>http://localhost:8080/webrp</runTarget>
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>update-theme</goal>
                        <goal>update-widgetset</goal>
                        <goal>compile</goal>
                        <!-- disabled by default to use on-the-fly theme compilation -->
                        <!-- <goal>compile-theme</goal> -->
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-source-plugin</artifactId>
            <version>2.4</version>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-clean-plugin</artifactId>
            <version>2.6.1</version>
            <!-- Clean up also any pre-compiled themes -->
            <configuration>
                <filesets>
                    <fileset>
                        <directory>src/main/webapp/VAADIN/themes</directory>
                        <includes>
                            <include>**/styles.css</include>
                            <include>**/styles.scss.cache</include>
                        </includes>
                    </fileset>
                </filesets>
            </configuration>
        </plugin>

        <!-- The Jetty plugin allows us to easily test the development build by
        running jetty:run on the command line. -->
        <plugin>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-maven-plugin</artifactId>
            <version>${jetty.plugin.version}</version>
            <configuration>
                <scanIntervalSeconds>2</scanIntervalSeconds>
            </configuration>
        </plugin>
    </plugins>

也许问题在于执行mvn clrean installand时mvn clean vaadin:compile跳过了以下步骤：

[INFO] 
[INFO] --- maven-clean-plugin:2.6.1:clean (default-clean) @ webrp ---
[INFO] Deleting C:\svn\tmpTrunk\webrp\target
[INFO] Deleting C:\svn\tmpTrunk\webrp\src\main\webapp\VAADIN\themes (includes = [**/styles.css, **/styles.scss.cache], excludes = [])
[INFO] 
[INFO] --- vaadin-maven-plugin:7.6.7:update-theme (default) @ webrp ---
[INFO] Theme processing is skipped
[INFO] 
[INFO] --- vaadin-maven-plugin:7.6.7:update-widgetset (default) @ webrp ---
[INFO] GWT compilation is skipped
[INFO] 
[INFO] >>> vaadin-maven-plugin:7.6.7:compile (default) @ webrp >>>
[INFO] 
[INFO] --- vaadin-maven-plugin:7.6.7:update-theme (default) @ webrp ---
[INFO] Theme processing is skipped
[INFO] 
[INFO] <<< vaadin-maven-plugin:7.6.7:compile (default) @ webrp <<<
[INFO] 
[INFO] --- vaadin-maven-plugin:7.6.7:compile (default) @ webrp ---
[INFO] GWT compilation is skipped
[INFO] 
[INFO] --- maven-install-plugin:2.3.1:install (default-install) @ webrp ---
[INFO] Installing C:\svn\tmpTrunk\webrp\pom.xml to C:\Users\s\.m2\repository\ru\comp\webrp\1.0\webrp-1.0.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6.162s
[INFO] Finished at: Tue Aug 09 10:06:32 MSK 2016
[INFO] Final Memory: 27M/445M
[INFO] ------------------------------------------------------------------------

Process finished with exit code 0

告诉我如何解决这个问题？