如何打印导入的java库？ [英] How to print imported java libraries?

问题描述

有没有办法在Java代码中打印已导入的库，并在执行期间可用？

Is there a way to print within a Java Code the libraries that has been imported, and available during the execution?

例如：

import javax.swing.JFrame;
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        //some code
    }   
}

I需要打印 javax.swing.JFrame 。

推荐答案

如果需要你的源代码中使用的实际导入（而不是使用字节码中的信息），你可以使用一个名为 QDox 的库来解析它您的源代码，并可以获得您使用的导入列表：

If you need the actual imports used in your source code (rather than using the information in the bytecode), you can use a library called QDox which will parse your source code and can get a list of the imports you use:

Main.java

Main.java

import com.thoughtworks.qdox.JavaDocBuilder;
import javax.swing.JFrame;
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        JavaDocBuilder java = new JavaDocBuilder();
        java.addSourceTree(new java.io.File("."));
        for (String i : java.getClassByName("Main").getSource().getImports()) {
            System.out.println(i);
        }
    }
}

编译并运行：

# If you don't have wget, just download the QDox jar by hand
wget -U "" http://repo1.maven.org/maven2/com/thoughtworks/qdox/qdox/1.12/qdox-1.12.jar

javac -classpath qdox-1.12.jar Main.java
java -classpath qdox-1.12.jar:. Main

输出为：

com.thoughtworks.qdox.JavaDocBuilder
javax.swing.JFrame

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