小编Pet*_*der的帖子

我有一个批处理文件,它使用maven运行java类,它依赖于tools.jar(来自JDK).
例如:
MVN -f \的pom.xml -e EXEC:java的-Dfile.encoding = "UTF-8" -Dexec.mainClass = MyClass的-Dexec.args ="%1%2%3%4%5%6 %7%8%9"-Dexec.classpathScope = runtime
我的程序使用JDK中的tools.jar,我在maven中添加了一个指向它的系统依赖项.
由于exec:java目标不包含系统依赖项,我想手动从命令行添加依赖项.
虽然我预计它是微不足道的,但我可以找到办法.任何帮助将不胜感激.
谢谢,
Avner

使用ajax我请求一个这样的authenticationID:

这是错误的,因为真正的HTTP-Transfer是这样的:

(顺便说一句:响应类型是"application/json; charset = UTF-8")

我看到之间发生了冲突

-1369082024195183657 and 
-1369082024195183600

如何防止四舍五入或是一个错误？

我有一个文件

/user/guest/work/test/src/main/java/Test.java

和一个文件对象：

File f = new File("/user/guest/work/test/src/main/java/Test.java");

我需要这个输出

System.out.println(f);                   ->                       src/main/java/Test.java
System.out.println(f.getAbsolutePath()); -> /user/guest/work/test/src/main/java/Test.java

我试过：

File relativeTo = new File("/user/guest/work/test");
new File(relativeTo.toURI().relativize(f.toURI()));

但它正在抛出一个

java.lang.IllegalArgumentException: URI is not absolute
   at java.io.File.<init>(File.java:416)
   at Test.<init>(Test.java:43)

如何获得所需的输出？

我使用此方法将客户端证书注册到服务器证书中.

/**
 * Links the user's certificate into the server's keystore/truststore.
 * 
 * @param server
 *            The server party.
 * @return <code>true</code> if the certificate has been bound,
 *         <code>false</code> if the certificate already was bound to the
 *         truststore.
 * @throws KeyStoreException
 */
public boolean linkToServerCertificate(Party server) throws KeyStoreException {
    if (keyAlias.equals(server.keyAlias)) {
        throw new IllegalArgumentException("The alias of client and server must be different!");
    }
    keystore.setCertificateEntry(server.keyAlias, server.getAliasCert());
    Certificate certificate = keystore.getCertificate(keyAlias);
    server.keystore.setCertificateEntry(keyAlias, certificate);
    return true;
}

重新启动AS后,我收到以下消息:

有环境变量JAVA_OPTS =" …

I like to generate images from .puml files in a maven project.

What i do not like to archivee is a hard binding between the project and the library that generates the images. So I like to use this build command:

mvn com.github.jeluard:plantuml-maven-plugin:1.2:generate \
  -Dplantuml.outputDirectory=target \
  -Dplantuml.sourceFiles={*.puml}

So the third line fills the sourceFiles-class-variable

Unfortunately the syntax {*.puml} seems to be wrong:

[INFO] --- plantuml-maven-plugin:1.2:generate (default-cli) @ test ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.047 …

将单例注入原型bean的类加载行为会是什么？

我尝试过以其他方式在单例中注入原型并使用查找方法解决问题。

如果应该调试由 gradle 运行的应用程序，则添加参数

--debug-jvm

调试器将启动一个 jpda-server（因为 server=yes）并挂起直到 eclipse（或其他）附加到套接字。

反过来怎么做？如何告诉 gradle-bootrun 附加到 eclipse-jpda-server？

我试图设置这样的选项：

bootRun {
  jvmArgs=["-agentlib:jdwp=transport=dt_socket,server=n,suspend=y,address=localhost:5005"]
}

但是出现异常：

* What went wrong:
Execution failed for task ':bootRun'.
> The value for property 'enabled' is final and cannot be changed any further.

* Try:
Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':bootRun'.
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.lambda$executeIfValid$1(ExecuteActionsTaskExecuter.java:205)
        at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:263)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeIfValid(ExecuteActionsTaskExecuter.java:203)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:184)
        at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:114) …

我编写了一个自定义 Maven 插件，可以从自定义模式构建 Java 代码。

项目结构是这样的：

Project
+ plugin
+ web-application

反应器首先编译插件，然后编译应用程序。

通常的 mvn 命令是：

mvn

...谁触发了<defaultGoal>plugin:scaffold package</defaultGoal>

在新机器上，构建失败，因为在 Reactor 计划构建阶段时插件尚不可知。所以我得mvn install先打电话。然后mvn plugin:scaffold package就像魅力一样发挥作用。

问题是：每当我修改脚手架插件并调用mvn plugin:scaffold package脚手架插件的修改时，尚未使用它，因为它尚未安装到存储库中。所以我得mvn install先再打电话。

有没有办法：

1. 安装对插件的修改
2. 使用插件的修改构建网络应用程序

一步到位？

我知道构造函数在java中不可继承,我们需要使用super() - super必须是Constructors中的第一个语句.

但为什么我不能使用@Override注释？

例如:

public class Foo extends Point2D.Double {
    @Override // The annotation @Override is disallowed for this location
    public Foo(){}
}

如果我有一个Foo的实例,我永远不能Point2D.Double.Double()直接打电话!这种行为完全像Overriding!

我有一个奇怪的 JPEG 图像文件 ImageIO.read() 无法加载：

ImageIO.read(new URL("http://nocturne.wmw.cc/a.jpg"));

有任何想法吗？

Exception in thread "main" javax.imageio.IIOException: Unsupported Image Type
    at com.sun.imageio.plugins.jpeg.JPEGImageReader.readInternal(JPEGImageReader.java:995)
    at com.sun.imageio.plugins.jpeg.JPEGImageReader.read(JPEGImageReader.java:966)
    at javax.imageio.ImageIO.read(ImageIO.java:1448)
    at javax.imageio.ImageIO.read(ImageIO.java:1400)
    at Main.main(Main.java:23)

图片网址