Java教程
java 同时启动多个项目
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1.工具类 JarStarter.jar
import java.io.*;
import java.util.Objects;
/**
* 启动项目依赖可执行jar的工具类
*/
public class JarStarter {
/**
*
* @param parttern 匹配的jar模式
* @param args 运行jar需要的参数
* @param sync 同步执行
*/
public static void start (String parttern, String[] args,boolean sync) {
String root = System.getProperty("user.dir");
findAndStartJar(new File(root),parttern,args,sync);
}
private static void findAndStartJar (File file, String parttern, String[] args,boolean sync) {
File[] listFiles = file.listFiles();
if (listFiles != null) {
for (File x : listFiles) {
if (x.getName().contains(parttern) && x.getName().endsWith(".jar")) {
doStart(x.getAbsolutePath(),args,sync);
} else {
if (x.isDirectory()) {
findAndStartJar (x,parttern,args,sync);
}
}
}
}
}
private static boolean doStart (String jarPath,String[] args,boolean sync) {
if (sync) {
start0(jarPath, args, sync);
} else {
new Thread(() -> {
start0(jarPath, args, sync);
}).start();
}
return true;
}
private static void start0 (String jarPath,String[] args,boolean sync) {
Runtime runtime = Runtime.getRuntime();
String cmd = "java -jar " + jarPath;
if (Objects.nonNull(args) && args.length > 0) {
for (int i = 0; i < args.length; i++) {
cmd = cmd.concat(args[i]);
}
}
System.err.println("use command " + cmd + "start a new jar");
try {
Process process = runtime.exec(cmd);
doPrint(process.getInputStream());
} catch (IOException e) {
e.printStackTrace();
}
}
public static void registerHook() {
new Thread(()-> {
while (true) {
Runtime runtime = Runtime.getRuntime();
runtime.addShutdownHook(new Thread(() -> {
try {
System.err.println("exit xxl-job-admin");
Process exec = runtime.exec("jps");
doPrint(exec.getInputStream());
} catch (IOException e) {
e.printStackTrace();
}
}));
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
}
private static void doPrint(InputStream inputStream) throws IOException {
byte bytes[] = new byte[1024];
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
String line = null;
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
inputStream.close();
}
public static void main(String[] args) throws IOException, InterruptedException {
start("xxl-job-admin-2.3.1",null,true);
}
}
2.在springboot中的使用
import com.google.common.collect.Lists;
import com.togeek.task.common.JarStarter;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration;
import org.springframework.scheduling.annotation.EnableScheduling;
import java.util.List;
@EnableScheduling
@SpringBootApplication(scanBasePackages = {"cn.togeek.util", "com.togeek"}, exclude = LiquibaseAutoConfiguration.class)
public class Application {
public static void main(String[] args) {
List
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