小编twe*_*sat的帖子

我正在使用eclipse,android 3.2.和运行android x86的虚拟机.(V3.2)

我使用Holo主题,我想删除操作栏标题和图标.所以我这样做

@Override
public void onCreate(Bundle savedInstanceState)
{
    ActionBar actionBar = getActionBar();
    actionBar.setDisplayShowTitleEnabled(false);
    actionBar.setDisplayShowHomeEnabled(false);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.test);
}

它工作正常,但......

当应用程序启动时,我首先显示标题和图标,然后才看到它们消失.所以它不是很漂亮.

如果我使用debug,我只能在离开onCreate时才能看到setDisplayShowTitleEnabled生效.

那么有没有办法在活动显示之前隐藏标题和图标？

谢谢.

什么相当于Windows中的主机文件？

我想添加一个dns条目,所以'sql1'指向localhost.

我尝试将sql1 127.0.0.1添加到/etc/resolveconf/resolv.conf.d/base,然后sudo service resolveconf restart,但它无法正常工作.ping到sql仍然给我未知的主机sql1.

我有一个字符串代表日期(有或没有时间)喜欢13/12/2017或13/12/2017 15:39:51

所以我正在尝试将java 8 DateTimeFormatter与可选部分一起使用.

该代码有效

LocalDateTime localDateTime = LocalDateTime.parse("13/12/2017 15:39:51",DateTimeFormatter.ofPattern("dd/MM/yyyy[ HH:mm:ss]"));
System.out.println(localDateTime.format(DateTimeFormatter.ofPattern("dd/MM/yyyy")));
System.out.println(localDateTime.format(DateTimeFormatter.ofPattern("HH:mm:ss")));

13/12/2017
15:39:51

但我不明白为什么那个没有

LocalDateTime localDateTime = LocalDateTime.parse("13/12/2017",DateTimeFormatter.ofPattern("dd/MM/yyyy[ HH:mm:ss]"));

给我

Exception in thread "main" java.time.format.DateTimeParseException: Text '13/12/2017' could not be parsed: Unable to obtain LocalDateTime from TemporalAccessor: {},ISO resolved to 2017-12-13 of type java.time.format.Parsed
at java.time.format.DateTimeFormatter.createError(DateTimeFormatter.java:1920)
at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1855)
at java.time.LocalDateTime.parse(LocalDateTime.java:492)
...

甚至还有

LocalDateTime localDateTime = LocalDateTime.parse("13/12/2017",DateTimeFormatter.ofPattern("dd/MM/yyyy"));

它不适用于相同的例外.

我有Ubuntu 18.04 server一个coporate proxy.

我设置http_proxy和https_proxy环境变量。

服务器正在运行Docker 19.03，它也被配置为使用 http_proxy 和 https_poxy。

如果运行docker run -it ubuntu:18.04，在容器内，我可以执行apt update和apt install curl -y

然后我可以做类似的事情curl www.google.com。

但它不适用于https：

root@1b6abfb4ff90:/# curl -v -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar
% Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                             Dload  Upload   Total   Spent    Left  Speed
0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     
0*   Trying 10.30.88.14...
* TCP_NODELAY set …

假设我有

class Student
{
String name;
int    age;
String teacher;
}

然后 :

public class App1
{
    public static void main(String[] args)
    {
        Student st = new Student();
        st.setName("toto");

        XStream xs = new XStream();

        xs.alias("student",Student.class);

        System.out.println(xs.toXML(st));
    }

}

给我 :

<student>
  <name>toto</name>
  <age>0</age>
</student>

有没有办法处理空值？我的意思是 :

<student>
  <name>toto</name>
  <age>0</age>
  <teacher></teacher>
</student>

如果我这样做是可能的

st.setTeacher("");

但如果老师是空的,那就不行了

我尝试使用自定义转换器,但似乎空值不会发送到转换器.

阅读这个问题,我尝试了答案中给出的例子,它运行正常.现在我想做同样的事情,但使用Student类的自定义适配器.所以我有:

public class AsyncDemo extends ListActivity {
  private static final String[] items={"lorem", "ipsum", "dolor",
                                      "sit", "amet", "consectetuer",
                                      "adipiscing", "elit", "morbi",
                                      "vel", "ligula", "vitae",
                                      "arcu", "aliquet", "mollis",
                                      "etiam", "vel", "erat",
                                      "placerat", "ante",
                                      "porttitor", "sodales",
                                      "pellentesque", "augue",
                                      "purus"};
    private List<Student>  students;
    private StudentAdapter studentsAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

//    setListAdapter(new ArrayAdapter<String>(this,
//                        android.R.layout.simple_list_item_1,
//                        new ArrayList<String>()));

    students = new ArrayList<Student>();
    students.clear();
    studentsAdapter = new StudentAdapter(this, students);
    setListAdapter(studentsAdapter);

    new AddStringTask().execute();
    }

//  class AddStringTask extends …

我厌倦了网络服务.

我有一个非常简单的soap webservice:

@Remote
public interface StudentService
{
public String sayHello();
public List<Student> getStudents();
}

和

@Stateless
@WebService
public class StudentServiceImpl implements StudentService
{

@Override
public String sayHello()
{
    return "Hello World";
}

public List<Student> getStudents()
{
    List<Student> students = new ArrayList<Student>();

    Student st1 = new Student();
    st1.setMatricule(1234);
    st1.setName("student1");
    students.add(st1);

    Student st2 = new Student();
    st2.setMatricule(5678);
    st2.setName("student2");
    students.add(st2);

    return students;
    }
}

和

public class Student implements Serializable
{
private static final long serialVersionUID = 8286393242028201686L;

private int matricule; 
private …

我有 :

src/main/java/com.tuto
|
-Class1.java
-Class2.java
-Class3.java

我的pom打包了一场战争.所以在我的战争中,在WEB-INF/classes/com/tuto中我发现了3个类.

现在我想排除Class2.java

我试过了

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.1</version>
            <configuration>
              <excludes>
                 <exclude>**/Class2.class</exclude>
              </excludes>
            </configuration>
        </plugin>

但它不起作用.

我能怎么做 ？

好吧,就像Aaron告诉我的那样,这是有效的:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-war-plugin</artifactId>
    <version>2.1</version>
    <configuration>
        <packagingExcludes>**/Class2.class</packagingExcludes>
    </configuration>
</plugin>

但......

让我们从另一方面解决问题:我想排除除Class1和Class3之外的所有问题

所以我试过了

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-war-plugin</artifactId>
    <version>2.1</version>
    <configuration>
        <packagingIncludes>**/Class1.class,**/Class3.class</packagingIncludes>
    </configuration>
</plugin>

而这次它不起作用.

我正在尝试将docker-compose环境变量用于由设置的图像名称，Jenkinsfile但是它不起作用。

我有一个Jenkinsfile包含

node() {

  stage('Checkout') {
    cleanWs()
    git credentialsId: 'xxx', url: 'ssh://git@...'
  }

  stage('Build') {
    withMaven(maven: 'maven-3.5.3') {
      sh 'mvn clean package'
      def pom = readMavenPom file:'pom.xml'
      JAR_FILE = pom.artifactId + "-" + pom.version + ".jar"
      JAR_VERSION = pom.version
    }
  }

  stage('Build Docker Image') {
    echo "Docker Build ..."
    docker.withTool('docker') {
      app = docker.build("microservices/my-service:${JAR_VERSION}","--build-arg JAR_FILE=${JAR_FILE} .")
    }
  }

  stage('Running Docker Container') {
    echo "Docker Run ..."
    withEnv(['VERSION=1.0.0']) {
      docker.withTool('docker') {
        sh "docker-compose rm -f …

我有一个SpringBoot 2.2.4.RELEASE像 RestRepostory 这样的

import io.micrometer.core.instrument.Gauge;
import io.micrometer.core.instrument.MeterRegistry;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.PostConstruct;

@RestController
public class MyController {

    private MeterRegistry meterRegistry;

    public MyController(MeterRegistry meterRegistry) {
        this.meterRegistry = meterRegistry;
    }

    private Gauge myGauge;
    private Integer myInteger = 0;

    @PostConstruct
    private void init() {
        myGauge = Gauge.builder("my.gauge", myInteger, Integer::intValue)
                .register(meterRegistry);
    }

    @GetMapping("/count")
    public void count() {
        myInteger = 5;
    }

}

应用程序启动后，访问http://localhost:8082/actuator/prometheus可以看到

# HELP my_gauge  
# TYPE my_gauge gauge
my_gauge 0.0

但是访问http://localhost:8082/count/后，该值仍然是 0.0

有什么问题 ？我也不明白构建器函数的第三个参数。是这个原因吗？ …