如果没有IDE，则无法安装jar包 [英] Cannot install a jar package without an IDE

问题描述

我有一个dropbox-core-sdk-1.7.5.jar存档文件.我尝试使用

I have a dropbox-core-sdk-1.7.5.jar archive file. I tried to install it as a package in my Home directory with:

java -jar dropbox-core-sdk-1.7.5.jar

java -jar dropbox-core-sdk-1.7.5.jar

但是终端弹出:在dropbox-core-sdk-1.7.5.jar中没有主清单属性".线程无法执行jar文件:无主清单属性" ; 建议我需要添加类似于"Main-Class:com.mypackage.MyClass" META-INF/MANIFEST.MF文件的行.但是我不知道我应该输入什么课程.

but the terminal spits out: "no main manifest attribute, in dropbox-core-sdk-1.7.5.jar". The thread Can't execute jar- file: "no main manifest attribute" suggests that I need to add a line similar to "Main-Class: com.mypackage.MyClass" META-INF/MANIFEST.MF file. But I don't know what class I'm supposed to type in.

我在 http://www.wikihow上找到了说明. com/Run-a-.Jar-Java-File ，但它们同样令人困惑.

I've found instructions on http://www.wikihow.com/Run-a-.Jar-Java-File, but they are just as confusing.

有人可以向我解释这个不可执行的jar文件应该怎么做，以便我可以让机器知道该软件包存在吗?

Can someone explain to me what I should do about this non-executable jar file so that I could let the machine know that this package exists?

推荐答案

命令行:

如果您尝试在没有IDE的情况下构建它，并使用

If you are trying to build it without an IDE and are using the Main.java file included on the Dropbox Site...

// Include the Dropbox SDK.
import com.dropbox.core.*;
import java.io.*;
import java.util.Locale;

public class Main
{
    public static void main(String[] args) throws IOException, DbxException
    {
        // Get your app key and secret from the Dropbox developers website.
        final String APP_KEY = "INSERT_APP_KEY";
        final String APP_SECRET = "INSERT_APP_SECRET";

        DbxAppInfo appInfo = new DbxAppInfo(APP_KEY, APP_SECRET);

        DbxRequestConfig config = new DbxRequestConfig("JavaTutorial/1.0",
            Locale.getDefault().toString());
        DbxWebAuthNoRedirect webAuth = new DbxWebAuthNoRedirect(config, appInfo);

        // Have the user sign in and authorize your app.
        String authorizeUrl = webAuth.start();
        System.out.println("1. Go to: " + authorizeUrl);
        System.out.println("2. Click \"Allow\" (you might have to log in first)");
        System.out.println("3. Copy the authorization code.");
        String code = new BufferedReader(new InputStreamReader(System.in)).readLine().trim();

        // This will fail if the user enters an invalid authorization code.
        DbxAuthFinish authFinish = webAuth.finish(code);

        DbxClient client = new DbxClient(config, authFinish.accessToken);

        System.out.println("Linked account: " + client.getAccountInfo().displayName);

        File inputFile = new File("working-draft.txt");
        FileInputStream inputStream = new FileInputStream(inputFile);
        try
        {
            DbxEntry.File uploadedFile = client.uploadFile("/magnum-opus.txt",
                DbxWriteMode.add(), inputFile.length(), inputStream);
            System.out.println("Uploaded: " + uploadedFile.toString());
        }
        finally
        {
            inputStream.close();
        }

        DbxEntry.WithChildren listing = client.getMetadataWithChildren("/");
        System.out.println("Files in the root path:");
        for (DbxEntry child : listing.children)
        {
            System.out.println("    " + child.name + ": " + child.toString());
        }

        FileOutputStream outputStream = new FileOutputStream("magnum-opus.txt");
        try
        {
            DbxEntry.File downloadedFile = client.getFile("/magnum-opus.txt", null,
                outputStream);
            System.out.println("Metadata: " + downloadedFile.toString());
        }
        finally
        {
            outputStream.close();
        }
    }
}

在相应目录的终端中使用以下命令行:

Use these command lines in a terminal from the appropriate directory:

要编译:javac -cp dropbox-core-sdk-1.7.5.jar Main.java
运行:java -cp .;dropbox-core-sdk-1.7.5.jar;jackson-core-2.2.3.jar Main(对于类似Unix的操作系统，使用:代替;)

To Compile: javac -cp dropbox-core-sdk-1.7.5.jar Main.java
To Run: java -cp .;dropbox-core-sdk-1.7.5.jar;jackson-core-2.2.3.jar Main (use : instead of ; for Unix-like operating systems)

Eclipse IDE:

如果使用的是Eclipse IDE，则只需将dropbox-core-sdk-1.7.5.jar文件复制到项目中，右键单击它，然后选择菜单选项Build Path -> Add to Build Path.然后，它应该出现在Package Explorer窗口的Referenced Libraries文件夹中，然后您就可以导入和使用它了.

If you are using the Eclipse IDE, you can simply copy the dropbox-core-sdk-1.7.5.jar file into your project, right click on it, and select the menu option Build Path -> Add to Build Path. It should then appear in your Referenced Libraries folder in the Package Explorer window, and then you should be able to import and use it.

重复jackson-core-2.2.3.jar的过程.

如果您愿意，此链接包含将.jar文件添加到项目的一般过程的多个分步图像:

This link has multiple step by step images of the general process of adding a .jar file to your project if you prefer: http://www.wikihow.com/Add-JARs-to-Project-Build-Paths-in-Eclipse-(Java)

// Import whatever you want from the Dropbox SDK...
import com.dropbox.*; // everything
import com.dropbox.core.*;
import com.dropbox.core.http.*;
import com.dropbox.core.json.*;
import com.dropbox.core.util.*;

public class Test
{
    public static void main(String[] args)
    {
        // Do stuff
    }
}

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