FPS Bard's questions

我的问题如下，有 XML：

<ds:Transforms>
   <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped"/>
   <ds:Transform Algorithm="http://www.w3.org/TR/2001/REC"/>
</ds:Transforms>

Transforms 标签是空的，但它有一个属性。

Pojo 变换：

@Data
public class Transforms {
    @JacksonXmlProperty(localName = "Transform")
    @JacksonXmlElementWrapper
    private List<Transform> transform;
}

波乔变换：

@Data
public class Transform {
    @JacksonXmlProperty(isAttribute = true, localName = "Algorithm")
    private String algorithm;
}

序列化和反序列化时我总是得到：

Transforms(transform=[])

如何获取带有属性的变换列表？

《有效编程》一书中的代码：

public class StopThread {
    private static boolean stopRequested;

    public static void main(String[] args) throws InterruptedException {
        Thread t = new Thread(() -> {
            int i = 0;
            while (!stopRequested){
                i++;
            }
            System.out.println(i);
        });
        t.start();

        Thread.sleep(10);
        stopRequested = true;
    }
}

此代码导致线程 t 内的无限循环。但是如果在给定的循环中，添加 System.out.printl();

public class StopThread {
    private static boolean stopRequested;

    public static void main(String[] args) throws InterruptedException {
        Thread t = new Thread(() -> {
            int i = 0;
            while (!StopThread.stopRequested){
                i++;
                System.out.println();
            }
            System.out.println(i);
        });
        t.start();

        Thread.sleep(10);
        stopRequested = true;
    }
}

在这种情况下，循环被中断。这个怎么运作？

我下载了 wildfly 快速入门 ma​​ster 分支，但我无法编译它，就像 mvn install 命令给出了类似的错误：

[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]
[ERROR]   The project org.wildfly.quickstarts:quickstart-parent:21.0.0.Beta1-SNAPSHOT (C:\Users\Main\Desktop\MyTutorials\quickstart-master\pom.xml) has 2 errors
[ERROR]     Non-resolvable import POM: Failure to find org.wildfly.bom:wildfly-jakartaee8-with-tools:pom:21.0.0.Beta1-SNAPSHOT in https://repository.jboss.org/nexus/content/groups/public/ was cached in the local repository, resolution will not be reattempted until the update interval of jboss-public-repository-
group has elapsed or updates are forced @ line 102, column 25 -> [Help 2]
[ERROR]     Non-resolvable import POM: Failure to find org.wildfly.bom:wildfly-microprofile:pom:21.0.0.Beta1-SNAPSHOT in https://repository.jboss.org/nexus/content/groups/public/ was cached in the local repository, resolution will not be reattempted until the update interval of jboss-public-repository-group has
 elapsed or updates are forced @ line 110, column 25 -> [Help 2]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
[ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException

`

[INFO] --- jaxws-tools-maven-plugin:1.2.3.Final:wsconsume (default) @ jaxws-retail-service ---
[ERROR] "C:\Program" ?? пў?п?вбп ў?гва????? Ё?Ё ў??и???
[ERROR] Є?? ?¤??, ЁбЇ???п???? Їа??а ???? Ё?Ё Ї Є?в?л? д ????.
[INFO]    ------------------------------------------------------------------------
[INFO] Reactor Summary for Quickstart: jaxws-retail 20.0.0.Final:
[INFO]
[INFO] Quickstart: jaxws-retail ........................... SUCCESS [  0.923 s]
[INFO] Quickstart: jaxws-retail - service ................. FAILURE [  0.839 s]
[INFO] Quickstart: jaxws-retail - client .................. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.911 s
[INFO] Finished at: 2020-06-26T14:59:21+03:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.jboss.ws.plugins:jaxws-tools-maven-plugin:1.2.3.Final:wsconsume (default) on project jaxws-retail-service: Error while running wsconsume: Process terminated with code 1 -> [Help 1]
[ERROR]

底线是 - Java 中有一个项目 - 一个在线书店，我在上面学习了编写 CRUD。用servlet编写并连接到mysql。从存储库下载时，表中必须填充某些数据。我知道我可以导出表格，但有必要从其他来源填充​​它们。我怎样才能做到这一点？我读到有一个内置的h2表，也就是说，如果我理解正确的话，它可以内置到项目本身中，它会存储数据。我可以以某种方式做到这一点，以便在项目部署和启动时，将来自 h2 的数据获取并传输到 mysql 吗？如果问题很愚蠢，请记住我们都研究并提出了愚蠢的问题）

编写了一个不会让未经授权的用户通过的登录过滤器：

在这种情况下，在授权期间，它会将我抛回登录页面，即 if 条件不起作用。但是如果我们通过 URI 添加验证：

这一切都很好！我不明白为什么会这样？为什么要做这个检查？请解释它是如何工作的。

import javax.swing.*;
import java.awt.*;

public class TabbedDemo {
    public static void main(String[] args) {
        String str;
        JFrame frame = new JFrame("TESSTING");
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.setSize(500, 500);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);

        JTabbedPane tabbedPane = new JTabbedPane();

        JPanel addPanel = new JPanel();
        addPanel.add(new JLabel("KOKO"));
        addPanel.add(new JButton("KOKO"));
        addPanel.add(new JTextField("KOKO"));

        JPanel updatePanel = new JPanel();
        JPanel deletePanel = new JPanel();
        JPanel showPanel = new JPanel();


        tabbedPane.addTab("ADD", addPanel);
        tabbedPane.addTab("UPDATE",updatePanel);
        tabbedPane.addTab("DELETE",deletePanel);
        tabbedPane.addTab("SHOW",showPanel);
        frame.add(tabbedPane);
    }
}