java 使用的Java执行一些本地命令,并等待返回结果
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package common;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
/**
* You can run native command by this util.
*
*
*/
public class NativeCommandUtil {
///// the test code
public static void main(String[] args) {
String cmd = "curl http://www.baidu.com";
try {
NativeCommandResponse response = runNativeCommand(cmd);
System.out.println(response);
} catch (NativeCommandRunException e) {
e.printStackTrace();
}
}
/**
* execute a native command
*
* @param command the command to run
* @return the result of the command
* @throws NativeCommandRunException ref {@link NativeCommandRunException}
*/
public static NativeCommandResponse runNativeCommand(String command) throws NativeCommandRunException {
if (command == null || command.isEmpty()) {
throw new NativeCommandRunException("empty command!");
}
String[] commandWithArgs = command.split(" ");
if (commandWithArgs.length == 0) {
throw new NativeCommandRunException("empty command find!");
}
return runNativeCommand(commandWithArgs);
}
/**
* execute a native command
*
* @param command the command to run
* @return the result of the command
* @throws NativeCommandRunException ref {@link NativeCommandRunException}
*/
public static NativeCommandResponse runNativeCommand(String... command) throws NativeCommandRunException {
if (command == null || command.length == 0) {
throw new NativeCommandRunException("empty command find!");
}
Process process;
try {
process = Runtime.getRuntime().exec(command);
} catch (Exception e) {
throw new NativeCommandRunException(e.getMessage());
}
/// read result from process
List<String> result = new ArrayList<>();
int exitCode = -1;
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
try {
String line;
while ((line = reader.readLine()) != null) {
result.add(line);
}
/// wait for the process to terminal
process.waitFor();
exitCode = process.exitValue();
} catch (Exception e) {
throw new NativeCommandRunException(e.getMessage());
} finally {
try {
reader.close();
} catch (IOException e) {
// ai
}
}
return new NativeCommandResponse(exitCode, result);
}
public static class NativeCommandResponse {
public NativeCommandResponse(int exitCode, List<String> ret) {
this.exitCode = exitCode;
this.ret = ret;
}
public NativeCommandResponse(int exitCode) {
this.exitCode = exitCode;
}
public int getExitCode() {
return exitCode;
}
public void setExitCode(int exitCode) {
this.exitCode = exitCode;
}
public List<String> getRet() {
return ret;
}
public void setRet(List<String> ret) {
this.ret = ret;
}
@Override
public String toString() {
return "NativeCommandResponse{" +
"exitCode=" + exitCode +
", ret=" + ret +
'}';
}
public boolean isOk() {
return exitCode == 0;
}
private int exitCode;
private List<String> ret;
}
public static class NativeCommandRunException extends Exception {
/**
* Constructs a new exception with {@code null} as its detail message.
* The cause is not initialized, and may subsequently be initialized by a
* call to {@link #initCause}.
*/
public NativeCommandRunException() {
super();
}
/**
* Constructs a new exception with the specified detail message. The
* cause is not initialized, and may subsequently be initialized by
* a call to {@link #initCause}.
*
* @param message the detail message. The detail message is saved for
* later retrieval by the {@link #getMessage()} method.
*/
public NativeCommandRunException(String message) {
super(message);
}
/**
* Constructs a new exception with the specified detail message and
* cause. <p>Note that the detail message associated with
* {@code cause} is <i>not</i> automatically incorporated in
* this exception's detail message.
*
* @param message the detail message (which is saved for later retrieval
* by the {@link #getMessage()} method).
* @param cause the cause (which is saved for later retrieval by the
* {@link #getCause()} method). (A <tt>null</tt> value is
* permitted, and indicates that the cause is nonexistent or
* unknown.)
*/
public NativeCommandRunException(String message, Throwable cause) {
super(message, cause);
}
/**
* Constructs a new exception with the specified cause and a detail
* message of <tt>(cause==null ? null : cause.toString())</tt> (which
* typically contains the class and detail message of <tt>cause</tt>).
* This constructor is useful for exceptions that are little more than
* wrappers for other throwables (for example, {@link
* java.security.PrivilegedActionException}).
*
* @param cause the cause (which is saved for later retrieval by the
* {@link #getCause()} method). (A <tt>null</tt> value is
* permitted, and indicates that the cause is nonexistent or
* unknown.)
*/
public NativeCommandRunException(Throwable cause) {
super(cause);
}
/**
* Constructs a new exception with the specified detail message,
* cause, suppression enabled or disabled, and writable stack
* trace enabled or disabled.
*
* @param message the detail message.
* @param cause the cause. (A {@code null} value is permitted,
* and indicates that the cause is nonexistent or unknown.)
* @param enableSuppression whether or not suppression is enabled
* or disabled
* @param writableStackTrace whether or not the stack trace should
* be writable
*/
protected NativeCommandRunException(String message, Throwable cause,
boolean enableSuppression,
boolean writableStackTrace) {
super(message, cause, enableSuppression, writableStackTrace);
}
}
}
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