JAVA Process类的简单学习

(1)执行简单的DOS命令，如打开一个记事本

    

Java代码
package com.iwtxokhtd.other;  
 
import java.io.IOException;  
 
public class ProcessTest {  
 
    public static void main(String[] args) {  
        try {  
                        Process proc=Runtime.getRuntime().exec("notepad");  
        } catch (IOException e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }  
 
    }  
 
} 

package com.iwtxokhtd.other;

import java.io.IOException;

public class ProcessTest {

public static void main(String[] args) {
try {
Process proc=Runtime.getRuntime().exec("notepad");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}


(2)使用它的其它构造方法执行相关的命令，如下例：

 

Java代码
package com.iwtxokhtd.other;  
 
import java.io.IOException;  
 
public class ProcessTest {  
 
    public static void main(String[] args) {  
        try {  
              
            String exeFullPathName="C:/Program Files/Internet Explorer/IEXPLORE.EXE";  
            String message="www.google.com";  
            String []cmd={exeFullPathName,message};  
            Process proc=Runtime.getRuntime().exec(cmd);  
        } catch (IOException e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }  
 
    }  
 
} 

package com.iwtxokhtd.other;

import java.io.IOException;

public class ProcessTest {

public static void main(String[] args) {
try {

String exeFullPathName="C:/Program Files/Internet Explorer/IEXPLORE.EXE";
String message="www.google.com";
String []cmd={exeFullPathName,message};
Process proc=Runtime.getRuntime().exec(cmd);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}


执行上述命令可以打开Google网站

(3)列出系统正在运行的所有进程信息

  

Java代码
package com.iwtxokhtd.other;  
 
import java.io.BufferedReader;  
import java.io.IOException;  
import java.io.InputStreamReader;  
 
public class ListAllProcessTest {  
 
    //列出所有的进程信息  
    public static void main(String[] args) {  
        BufferedReader br=null;  
        try {  
            Process proc=Runtime.getRuntime().exec("tasklist");  
            br=new BufferedReader(new InputStreamReader(proc.getInputStream()));  
            @SuppressWarnings("unused")  
            String line=null;  
            System.out.println("打印所有正在运行的进程信息");  
            while((line=br.readLine())!=null){  
                System.out.println(br.readLine());  
            }  
        } catch (IOException e) {  
            e.printStackTrace();  
        }finally{  
            if(br!=null){  
                try {  
                    br.close();  
                } catch (Exception e) {  
                    e.printStackTrace();  
                }  
            }  
        }  
          
 
    }  
 
} 

package com.iwtxokhtd.other;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class ListAllProcessTest {

//列出所有的进程信息
public static void main(String[] args) {
BufferedReader br=null;
try {
Process proc=Runtime.getRuntime().exec("tasklist");
br=new BufferedReader(new InputStreamReader(proc.getInputStream()));
@SuppressWarnings("unused")
String line=null;
System.out.println("打印所有正在运行的进程信息");
while((line=br.readLine())!=null){
System.out.println(br.readLine());
}
} catch (IOException e) {
e.printStackTrace();
}finally{
if(br!=null){
try {
br.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}


}

}


(4)判断一个具体的进程是否正在运行，如下例：

Java代码
package com.iwtxokhtd.other;  
import java.io.BufferedReader;  
import java.io.InputStreamReader;  
public class FindProcessExeTest  
{  
    public static void main(String []args){  
          
        if(findProcess("QQ.exe")){  
            System.out.println("------判断指定的进程是否在运行------");  
            System.out.println("QQ.exe该进程正在运行!");  
        }else{  
            System.out.println("------判断指定的进程是否在运行------");  
            System.out.println("QQ.exe该进程没有在运行!");  
        }  
 
    }  
    public static boolean findProcess(String processName){  
        BufferedReader br=null;  
        try{  
             
            //下面这句是列出含有processName的进程图像名  
            Process proc=Runtime.getRuntime().exec("tasklist /FI \"IMAGENAME eq "+processName+"\"");  
            br=new BufferedReader(new InputStreamReader(proc.getInputStream()));  
            String line=null;  
            while((line=br.readLine())!=null){  
                //判断指定的进程是否在运行  
                if(line.contains(processName)){  
                    return true;  
                }  
            }  
              
            return false;  
        }catch(Exception e){  
            e.printStackTrace();  
            return false;  
        }finally{  
            if(br!=null){  
                try{  
                    br.close();  
                }catch(Exception ex){  
                }  
            }  
              
        }  
    }  
}