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ããpublic Process execï¼String[] cmdarrayï¼ String[] envpï¼ File dirï¼
ããpublic Process execï¼String commandï¼ String[] envpï¼ File dirï¼
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redirectErrorStreamï¼boolean redirectErrorStreamï¼
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ãã
import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
ããpublic class Test1 {
public static void main(String[] args) {
try {
Process p = null;
String line = null;
BufferedReader stdout = null;
ãã//list the files and directorys under C:\
p = Runtime.getRuntime().exec("CMD.exe /C dir", null, new File("C:\\"));
stdout = new BufferedReader(new InputStreamReader(p
.getInputStream()));
while ((line = stdout.readLine()) != null) {
System.out.println(line);
}
stdout.close();
ãã//echo the value of NAME
p = Runtime.getRuntime().exec("CMD.exe /C echo %NAME%", new String[] {"NAME=TEST"});
stdout = new BufferedReader(new InputStreamReader(p
.getInputStream()));
while ((line = stdout.readLine()) != null) {
System.out.println(line);
}
stdout.close();
} catch (Exception e) {
e.printStackTrace();
}
}
ããï¼2ï¼ProcessBuilder
ãã
ããimport java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
ããpublic class Test2 {
public static void main(String[] args) {
try {
List list = new ArrayList();
ProcessBuilder pb = null;
Process p = null;
String line = null;
BufferedReader stdout = null;
//list the files and directorys under C:\
list.add("CMD.EXE");
list.add("/C");
list.add("dir");
pb = new ProcessBuilder(list);
pb.directory(new File("C:\\"));
p = pb.start();
stdout = new BufferedReader(new InputStreamReader(p
.getInputStream()));
while ((line = stdout.readLine()) != null) {
System.out.println(line);
}
stdout.close();
ãã//echo the value of NAME
pb = new ProcessBuilder();
mand(new String[] {"CMD.exe", "/C", "echo %NAME%"});
pb.environment().put("NAME", "TEST");
p = pb.start();
stdout = new BufferedReader(new InputStreamReader(p
.getInputStream()));
while ((line = stdout.readLine()) != null) {
System.out.println(line);
}
stdout.close();
} catch (Exception e) {
e.printStackTrace();
}
}
ãã}
ãã5ãè·åè¿ç¨çè¿åå¼
ããé常ï¼ä¸ä¸ªç¨åº/è¿ç¨å¨æ§è¡ç»æåä¼åæä½ç³»ç»è¿åä¸ä¸ªæ´æ°å¼ï¼0ä¸è¬ä»£è¡¨æ§è¡æåï¼é0表示æ§è¡åºç°é®é¢ãæ两ç§æ¹å¼å¯ä»¥ç¨æ¥è·åè¿ç¨çè¿å
å¼ãä¸æ¯å©ç¨waitFor()ï¼è¯¥æ¹æ³æ¯é»å¡çï¼æ§å¯¼è¿ç¨æ§è¡å®æååè¿åã该æ¹æ³è¿åä¸ä¸ªä»£è¡¨è¿ç¨è¿åå¼çæ´æ°å¼ãå¦ä¸ä¸ªæ¹æ³æ¯è°ç¨
exitValue()æ¹æ³ï¼è¯¥æ¹æ³æ¯éé»å¡çï¼è°ç¨ç«å³è¿åãä½æ¯å¦æè¿ç¨æ²¡ææ§è¡å®æï¼åæåºå¼å¸¸ã
ãã6ãé»å¡çé®é¢
ããç±Process代表çè¿ç¨å¨æäºå¹³å°ä¸ææ¶å并ä¸è½å¾å¥½çå·¥ä½ï¼ç¹å«æ¯å¨å¯¹ä»£è¡¨è¿ç¨çæ åè¾å
¥æµãè¾åºæµåé误è¾åºè¿è¡æä½æ¶ï¼å¦æ使ç¨ä¸æ
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ãã
ããstdout = new BufferedReader(new InputStreamReader(p
.getErrorStream()));
ããé£ä¹ç¨åºå°åçé»å¡ï¼ä¸è½æ§è¡å®æï¼èæ¯hangå¨é£éã
ããå½è¿ç¨å¯å¨åï¼å°±ä¼æå¼æ åè¾åºæµåé误è¾åºæµåå¤è¾åºï¼å½è¿ç¨ç»ææ¶ï¼å°±ä¼å
³éä»ä»¬ãå¨ä»¥ä¸ä¾åä¸ï¼é误è¾åºæµæ²¡ææ°æ®è¦è¾åºï¼æ åè¾åºæµä¸
ææ°æ®è¾åºãç±äºæ åè¾åºæµä¸çæ°æ®æ²¡æ被读åï¼è¿ç¨å°±ä¸ä¼ç»æï¼é误è¾åºæµä¹å°±ä¸ä¼è¢«å
³éï¼å æ¤å¨è°ç¨readLine()æ¹æ³æ¶ï¼æ´ä¸ªç¨åºå°±ä¼è¢«é»
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ããé对æ åè¾åºæµåé误è¾åºæµæé æçé®é¢ï¼å¯ä»¥ä½¿ç¨ProcessBuilderçredirectErrorStream()æ¹æ³å°ä»ä»¬åäºä¸ºä¸ï¼è¿æ¶ååªè¦è¯»åæ åè¾åºçæ°æ®å°±å¯ä»¥äºã
ããå½å¨ç¨åºä¸ä½¿ç¨ProcessçwaitFor()æ¹æ³æ¶ï¼ç¹å«æ¯å¨è¯»åä¹åè°ç¨waitFor()æ¹æ³æ¶ï¼ä¹æå¯è½é æé»å¡ãå¯ä»¥ç¨çº¿ç¨çæ¹æ³æ¥è§£å³è¿ä¸ªé®é¢ï¼ä¹å¯ä»¥å¨è¯»åæ°æ®åï¼è°ç¨waitFor()æ¹æ³çå¾
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ããï¼1ï¼ä½¿ç¨ProcessBuilderç±»ï¼å©ç¨redirectErrorStreamæ¹æ³å°æ åè¾åºæµåé误è¾åºæµåäºä¸ºä¸ï¼å¨ç¨start()æ¹æ³å¯å¨è¿ç¨åï¼å
ä»æ åè¾åºä¸è¯»åæ°æ®ï¼ç¶åè°ç¨waitFor()æ¹æ³çå¾
è¿ç¨ç»æã
ããå¦ï¼
ãã
ããimport java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
ããpublic class Test3 {
public static void main(String[] args) {
try {
List list = new ArrayList();
ProcessBuilder pb = null;
Process p = null;
String line = null;
BufferedReader stdout = null;
//list the files and directorys under C:\
list.add("CMD.EXE");
list.add("/C");
list.add("dir");
pb = new ProcessBuilder(list);
pb.directory(new File("C:\\"));
//merge the error output with the standard output
pb.redirectErrorStream(true);
p = pb.start();
//read the standard output
stdout = new BufferedReader(new InputStreamReader(p
.getInputStream()));
while ((line = stdout.readLine()) != null) {
System.out.println(line);
}
int ret = p.waitFor();
System.out.println("the return code is " + ret);
stdout.close();
ãã} catch (Exception e) {
e.printStackTrace();
}
}
ãã}
ããï¼2ï¼ä½¿ç¨çº¿ç¨
ãã
ããimport java.util.*;
import java.io.*;
ããclass StreamWatch extends Thread {
InputStream is;
ããString type;
ããList output = new ArrayList();
ããboolean debug = false;
ããStreamWatch(InputStream is, String type) {
this(is, type, false);
}
ããStreamWatch(InputStream is, String type, boolean debug) {
this.is = is;
this.type = type;
this.debug = debug;
}
ããpublic void run() {
try {
PrintWriter pw = null;
ããInputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line = null;
while ((line = br.readLine()) != null) {
output.add(line);
if (debug)
System.out.println(type + ">" + line);
}
if (pw != null)
pw.flush();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
ããpublic List getOutput() {
return output;
}
}
ããpublic class Test5 {
public static void main(String args[]) {
try {
List list = new ArrayList();
ProcessBuilder pb = null;
Process p = null;
ãã// list the files and directorys under C:\
list.add("CMD.EXE");
list.add("/C");
list.add("dir");
pb = new ProcessBuilder(list);
pb.directory(new File("C:\\"));
p = pb.start();
ãã// process error and output message
StreamWatch errorWatch = new StreamWatch(p.getErrorStream(),
"ERROR");
StreamWatch outputWatch = new StreamWatch(p.getInputStream(),
"OUTPUT");
ãã// start to watch
errorWatch.start();
outputWatch.start();
ãã//wait for exit
int exitVal = p.waitFor();
ãã//print the content from ERROR and OUTPUT
System.out.println("ERROR: " + errorWatch.getOutput());
System.out.println("OUTPUT: " + outputWatch.getOutput());
System.out.println("the return code is " + exitVal);
ãã} catch (Throwable t) {
t.printStackTrace();
}
}
}
ãã7ãå¨Javaä¸æ§è¡Javaç¨åº
ããæ§è¡ä¸ä¸ªJavaç¨åºçå
³é®å¨äºï¼
ããï¼1ï¼ç¥éJAVAèææºçä½ç½®ï¼å³java.exeæè
javaçè·¯å¾
ããï¼2ï¼ç¥éè¦æ§è¡çjavaç¨åºçä½ç½®
ããï¼3ï¼ç¥é该ç¨åºæä¾èµçå
¶ä»ç±»çä½ç½®
ãã举ä¸ä¸ªä¾åï¼ä¸ç®äºç¶ã
ããï¼1ï¼å¾
æ§è¡çJavaç±»
ãã
public class MyTest {
public static void main(String[] args) {
System.out.println("OUTPUT one");
System.out.println("OUTPUT two");
System.err.println("ERROR 1");
System.err.println("ERROR 2");
for(int i = 0; i < args.length; i++)
{
System.out.printf("args[%d] = %s.", i, args[i]);
}
}
}
ããï¼2ï¼æ§è¡è¯¥ç±»çç¨åº
ãã
import java.util.*;
import java.io.*;
ããclass StreamWatch extends Thread {
InputStream is;
ããString type;
ããList output = new ArrayList();
ããboolean debug = false;
ããStreamWatch(InputStream is, String type) {
this(is, type, false);
}
ããStreamWatch(InputStream is, String type, boolean debug) {
this.is = is;
this.type = type;
this.debug = debug;
}
ããpublic void run() {
try {
PrintWriter pw = null;
ããInputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line = null;
while ((line = br.readLine()) != null) {
output.add(line);
if (debug)
System.out.println(type + ">" + line);
}
if (pw != null)
pw.flush();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
ããpublic List getOutput() {
return output;
}
}
ããpublic class Test6 {
public static void main(String args[]) {
try {
List list = new ArrayList();
ProcessBuilder pb = null;
Process p = null;
String java = System.getProperty("java.home") + File.separator + "bin" + File.separator + "java";
String classpath = System.getProperty("java.class.path");
// list the files and directorys under C:\
list.add(java);
list.add("-classpath");
list.add(classpath);
list.add(MyTest.class.getName());
list.add("hello");
list.add("world");
list.add("good better best");
pb = new ProcessBuilder(list);
p = pb.start();
System.out.println(mand());
ãã// process error and output message
StreamWatch errorWatch = new StreamWatch(p.getErrorStream(),
"ERROR");
StreamWatch outputWatch = new StreamWatch(p.getInputStream(),
"OUTPUT");
ãã// start to watch
errorWatch.start();
outputWatch.start();
ãã//wait for exit
int exitVal = p.waitFor();
ãã//print the content from ERROR and OUTPUT
System.out.println("ERROR: " + errorWatch.getOutput());
System.out.println("OUTPUT: " + outputWatch.getOutput());
System.out.println("the return code is " + exitVal);
ãã} catch (Throwable t) {
t.printStackTrace();
}
}
}
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