使用mogrify 转化图片格式为RGB-白红宇

mogrify 下载地址:http://www.imagemagick.org/script/binary-releases.php#windows

cmd执行结果:

mogrify -colorspace RGB -quality 100 "D:\software\eclipse\workspace2\demo_channel_terminal\src\main\resources\mini.jpg"

说明:最后一个参数是要转化的图片全路径.

那么如何使用来调用呢?

测试代码:

       Java代码   
@Test  
        public void test02()  
        {  
            Process p = null;  
            String []command = null;  
  
            command = new String[]{ 
"cmd"," /c ","mogrify.exe" ,"-colorspace", "RGB", "-quality" ,"100" ,"\"D:\\software\\eclipse\\workspace2\\demo_channel_terminal\\src\\main\\resources\\mini.jpg\""};//cmd /c is needed
            BufferedReader reader = null;  
            try  
            {  
                p = Runtime.getRuntime().exec(command, null);//)  
                reader = new BufferedReader(new InputStreamReader(p  
                        .getErrorStream(),"gbk"));  
                StringBuilder sb = new StringBuilder();  
                String readedLine = null;  
                try  
                {  
                    while ((readedLine = reader.readLine()) != null)  
                    {  
                        sb.append(readedLine);  
                        sb.append("\r\n");  
                    }  
                }  
                catch (IOException e)  
                {  
                    e.printStackTrace();  
                }  
                finally  
                {  
                    try  
                    {  
                        reader.close();  
                        p.destroy();  
                    }  
                    catch (IOException e)  
                    {  
                        e.printStackTrace();  
                    }  
                }  
                String content = sb.toString();  
                System.out.println(content);  
            }  
            catch (IOException e)  
            {  
                e.printStackTrace();  
            }  
  
        }  

执行报错:

'mogrify.exe' 不是内部或外部命令，也不是可运行的程序

或批处理文件。

但是我在命令行里面执行没有问题呀!!!

为什么命令行里面没问题,java调用就有问题呢?

最后找到了原因:java执行本地命令时要指定命令(exe文件)所在路径

String commandFolder="D:\\Program Files\\ImageMagick-6.8.9-Q16\\";

p = Runtime.getRuntime().exec(command, null,new File(commandFolder/*命令的所在目录*/));//)

reader = new BufferedReader(new InputStreamReader(p

.getErrorStream(),"gbk"));

正确的代码如下:

       Java代码   
@Test  
        public void test02()  
        {  
            Process p = null;  
            String []command = null;  
//          command = new String[]{"cmd"," /c ","dir"};//cmd /c is needed  
            command = new String[]{ 
"cmd"," /c ","mogrify.exe" ,"-colorspace", "RGB", "-quality" ,"100" ,"\"D:\\software\\eclipse\\workspace2\\demo_channel_terminal\\src\\main\\resources\\mini.jpg\""};//cmd /c is needed
            BufferedReader reader = null;  
            try  
            {  
                String commandFolder="D:\\Program Files\\ImageMagick-6.8.9-Q16\\";  
                p = Runtime.getRuntime().exec(command, null,new File(commandFolder/*命令的所在目录*/));//)  
                reader = new BufferedReader(new InputStreamReader(p  
                        .getErrorStream(),"gbk"));  
                StringBuilder sb = new StringBuilder();  
                String readedLine = null;  
                try  
                {  
                    while ((readedLine = reader.readLine()) != null)  
                    {  
                        sb.append(readedLine);  
                        sb.append("\r\n");  
                    }  
                }  
                catch (IOException e)  
                {  
                    e.printStackTrace();  
                }  
                finally  
                {  
                    try  
                    {  
                        reader.close();  
                        p.destroy();  
                    }  
                    catch (IOException e)  
                    {  
                        e.printStackTrace();  
                    }  
                }  
                String content = sb.toString();  
                System.out.println(content);  
            }  
            catch (IOException e)  
            {  
                e.printStackTrace();  
            }  
  
        }  

mogrify网盘下载地址:http://pan.baidu.com/s/1i3vHPOh

安装完成之后目录情况:

参考:http://iaiai.iteye.com/blog/1461370

注意:

(1)java 执行dir或ipconfig的命令不需要执行命令所在目录,但是执行用户安装上的exe就必须执行命令所在目录;

(2)java执行操作系统命令时一定要加上"cmd /c"