command = "cmd.exe /c "+command;
ByteArrayOutputStream stdout = new ByteArrayOutputStream();
PumpStreamHandler psh = new PumpStreamHandler(stdout);
CommandLine cl = CommandLine.parse(command);
DefaultExecutor exec = new DefaultExecutor();
exec.setStreamHandler(psh);
try{
    exec.execute(cl);
}catch (Exception e){
    e.printStackTrace();
}
return  stdout.toString();

<dependency>
   <groupId>org.apache.commons</groupId>
   <artifactId>commons-exec</artifactId>
   <version>1.3</version>
</dependency>

使用Apache Common-Exec 框架