JNLP - NoSuchMethodException(JNLP - NoSuchMethodException)

 一段时间以来一直在努力解决这个问题。 我有一个类，有一个主要的方法，当从Eclipse运行时，这个方法非常好。 无论如何，当我使用我的JNLP文件运行它（使用maven-jar-plugin）时，我无法管理它来开始工作。 
 
 我得到的错误如下： 
 
java.lang.NoSuchMethodException: my.package.ishere.MainClass.main([Ljava.lang.String;)
    at java.lang.Class.getMethod(Unknown Source)
    at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
    at com.sun.javaws.Launcher.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
 
 我的主要方法是在正确的包中，主要方法是public，static，返回类型是void，并且有一个字符串数组作为参数。 
 
 为了生成jar文件，在pom中我包含以下内容： 
 
<plugin>
          <artifactId>maven-jar-plugin</artifactId>
          <configuration>             
            <source>1.6</source>
            <target>1.6</target>
            <encoding>UTF-8</encoding> 
                <archive>
                        <manifestFile>${manifestFile}</manifestFile>
                        <manifest>
                            <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                            <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
                            <mainClass>my.package.ishere.Mainclass</mainClass>
                        </manifest>
                        <addMavenDescriptor>false</addMavenDescriptor>
                    </archive>
                </configuration>
</plugin>
 
 最后，在我的JNLP中，我正确地包含了代码库，正确地包含了所有必需的资源，以及具有main =“true”属性的jar文件。 
 
 此外，我甚至在jar上检查了清单文件，它清楚地说明了Main-Class：my.package.ishere.MainClass 。 任何人都可以给我一个关于接下来要检查的提示吗？ 我疯了！ 
 
 （显然包名和类名不是真正的名称）。 
 
 提前致谢！！ 
 
 编辑：MainClass代码请求。 
 
package my.package.ishere;

//HELLA long import list not going to add.

public class MainClass extends Frame implements WindowListener {

static String xmlParams;

public static void main(String[] args) {
    try {
            xmlParams = new String(base64Decoder.decodeBuffer(args[0]));
            MainClass mc = new MainClass();
            mc.setLayout(new FlowLayout());
            System.out.println(mc.getParameter("id"));
            mc.init();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}
 
 这是一个我转换成独立应用程序的旧applet。 
 
 更新： 
 
 设法使它运行主jar; 将maven的类路径添加到清单中，并从命令提示符处运行java -jar name-of-the-jar.jar param1和yay，它工作正常。 无论如何，没有设法从JNLP直接运行 - 仍然得到“NoSuchMethodException”。 

Been struggling with this issue for a while already. I have a class, with a main method, which works perfectly fine when ran from Eclipse. No matter what, when i jar it (with maven-jar-plugin) to run it with my JNLP file i can't manage it to get to work.
 
The error im getting is as follows:
 
java.lang.NoSuchMethodException: my.package.ishere.MainClass.main([Ljava.lang.String;)
    at java.lang.Class.getMethod(Unknown Source)
    at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
    at com.sun.javaws.Launcher.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
 
My main method is in the right package, and the main method is public, static, returning type is void and has an array of strings as the parameter.
 
In order to generate the jar file, in the pom I include the following:
 
<plugin>
          <artifactId>maven-jar-plugin</artifactId>
          <configuration>             
            <source>1.6</source>
            <target>1.6</target>
            <encoding>UTF-8</encoding> 
                <archive>
                        <manifestFile>${manifestFile}</manifestFile>
                        <manifest>
                            <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                            <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
                            <mainClass>my.package.ishere.Mainclass</mainClass>
                        </manifest>
                        <addMavenDescriptor>false</addMavenDescriptor>
                    </archive>
                </configuration>
</plugin>
 
Finally, in my JNLP, I'm including the codebase correctly, all the required resources correctly, and the jar file with the main="true" attribute.
 
Furthermore, I even checked the manifest file on the jar and it says clearly Main-Class: my.package.ishere.MainClass. Could anyone give me a hint on what to check next? I'm going nuts!
 
(Obviously the package name and the class name ain't the real ones).
 
Thanks in advance!!
 
EDIT: MainClass code on request.
 
package my.package.ishere;

//HELLA long import list not going to add.

public class MainClass extends Frame implements WindowListener {

static String xmlParams;

public static void main(String[] args) {
    try {
            xmlParams = new String(base64Decoder.decodeBuffer(args[0]));
            MainClass mc = new MainClass();
            mc.setLayout(new FlowLayout());
            System.out.println(mc.getParameter("id"));
            mc.init();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}
 
It is an old applet I converted into a stand-alone application.
 
UPDATE:
 
Managed to make it work running the main jar; added the classpath from maven to the manifest and from the command prompt i ran java -jar name-of-the-jar.jar param1 and yay, it worked. No matter what, haven't managed to run it straight from the JNLP - still getting the "NoSuchMethodException".

原文：https://stackoverflow.com/questions/33147530