java ProcessBuidler

最新推荐文章于 2024-01-19 11:11:18 发布

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本文介绍了一个Java程序，该程序利用ProcessBuilder类来执行外部命令并捕获输出。示例展示了如何设置工作目录及合并错误流，同时读取命令执行后的输出。



import java.io.File;
import java.io.InputStream;

/**
 * 
 * @author xiejiaohui
 *
 */
public class ProcessBuilderTest {

	public static synchronized void run(String[] cmd, String dir) {
		try {
			ProcessBuilder builder = new ProcessBuilder(cmd);
			if (dir != null && (!"".equals(dir))) {
				builder.directory(new File(dir));
			}
			builder.redirectErrorStream(true);
			Process process = builder.start();
			InputStream input = process.getInputStream();

			byte[] re = new byte[1024];
			while (input.read(re) != -1) {
				System.out.println(new String(re));
			}
			input.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static void main(String[] args) {
		String[] xjh_1 = {"java", "-server", "-version"};
		String[] xjh_2 = { "javac", "HelloWorld.java" };
		String[] xjh_3 = { "java", "HelloWorld" };
		try {
			ProcessBuilderTest.run(xjh_1, null);
			ProcessBuilderTest.run(xjh_1, "");
			ProcessBuilderTest.run(xjh_1, "d://");
			ProcessBuilderTest.run(xjh_2, "d://");
			ProcessBuilderTest.run(xjh_3, "d://");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}