我无法捕获控制台输出从Java在FOP过程和所有我的过程

我无法捕获控制台输出从Java在FOP过程和所有我的过程

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我无法捕获控制台输出从Java在FOP过程和所有我的过程，它不工作

本文介绍了我无法捕获控制台输出从Java在FOP过程和所有我的过程，它不工作的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我使用eclipse + java。我有一个从控制台执行指令的方法。复制& 

  public void viewPDF（String cmd）{
 
 try {
 
进程p = Runtime.getRuntime（）。exec（cmd）; 
 
 BufferedReader in = new BufferedReader（
 new InputStreamReader（p.getInputStream（）））; 
 String line = null; 
 while（（line = in.readLine（））！= null）{
 System.out.println（line）; 
} 
} catch（IOException e）{
 e.printStackTrace（）; 
} 
}



如果我在控制台cmd中执行这个代码。

  C：\fop-0.93 \fop -xml C：\document.xml -xsl C：\ document.xsl -pdf C：\document.pdf -d

但如果我尝试执行java方法它不工作，因为我不能捕获控制台输出。



控制台正在等待，最后我需要停止红色按钮...



有人可以捕获控制台输出？与其他进程我可以（.bat，文件读取等...）但捕获fop输出它是不可能的。



PD：对不起我的英语... :(



谢谢!!!

解决方案


这篇文章中的某人：



时Fop异常



说



FWIW，FOP只是一个java库，你不想将它作为外部进程执行，只需使用STI API。示例代码.google.com/p/fop-maven-plugin/source/browse / ...一个例子如何fo。 - Gyro Gearless Aug 30 at 21:27



这是我创建的类inspired：D other：

  import java.io.ByteArrayInputStream; 
 import java.io.ByteArrayOutputStream; 
 import java.io.File; 
 import java.io.FileNotFoundException; 
 import java.io.FileOutputStream; 
 import java.io.IOException; 
 import java.io.InputStream; 
 import java.io.OutputStream; 
 
 import javax.xml.transform.Result; 
 import javax.xml.transform.Source; 
 import javax.xml.transform.Transformer; 
 import javax.xml.transform.TransformerConfigurationException; 
 import javax.xml.transform.TransformerException; 
 import javax.xml.transform.TransformerFactory; 
 import javax.xml.transform.TransformerFactoryConfigurationError; 
 import javax.xml.transform.sax.SAXResult; 
 import javax.xml.transform.stream.StreamSource; 
 
 import org.apache.fop.apps.FOPException; 
 import org.apache.fop.apps.FOUserAgent; 
 import org.apache.fop.apps.Fop; 
 import org.apache.fop.apps.FopFactory; 
 import org.apache.fop.apps.MimeConstants; 
 
 public class ConstructorFOP {
 
 private InputStream inputStream; 
 
 public void xmlToPdf（String RUTA_XML，String RUTA_XSL，String RUTA_PDF）{
 
 try {
 System.out.println（Preparing ...）; 
 
 //设置目录
文件baseDir = new File（C：）; 
文件outDir =新文件（baseDir，out）; 
 outDir.mkdirs（）; 
 
文件xmlfile =新文件（RUTA_XML）; 
文件xsltfile =新文件（RUTA_XSL）; 
文件pdffile =新文件（RUTA_PDF）; 
 
 System.out.println（输入XML：+ xmlfile）; 
 System.out.println（Input XSL：+ xsltfile）; 
 System.out.println（OutputPDF：+ pdffile）; 
 System.out.println（）; 
 System.out.println（Transforming ...）; 
 
 //根据需要配置fopFactory 
 final FopFactory fopFactory = FopFactory.newInstance（）; 
 
 FOUserAgent foUserAgent = fopFactory.newFOUserAgent（）; 
 //根据需要配置foUserAgent 
 
 ByteArrayOutputStream out = new ByteArrayOutputStream（）; 
 
 TransformerFactory tFactory = TransformerFactory.newInstance（）; 
 
 Fop fop = fopFactory.newFop（MimeConstants.MIME_PDF，foUserAgent，out）; 
 
 //设置输入
源src = new StreamSource（xmlfile）; 
 
 //安装Transformer 
源xsltSrc = new StreamSource（xsltfile）; 
 Transformer transformer = tFactory.newTransformer（xsltSrc）; 
 
 //确保XSL转换的结果通过管道传递到FOP 
结果res = new SAXResult（fop.getDefaultHandler（））; 
 transformer.transform（src，res）; 
 
 ByteArrayOutputStream baos = out; 
 inputStream = new ByteArrayInputStream（baos.toByteArray（））; 
 
 InputStreamAFile（pdffile，inputStream）; 
} catch（FOPException e）{
 System.out.println（ERROR DOC 3）; 
 e.printStackTrace（）; 
} catch（TransformerConfigurationException e）{
 System.out.println（ERROR DOC 4）; 
 e.printStackTrace（）; 
} catch（TransformerFactoryConfigurationError e）{
 System.out.println（ERROR DOC 5）; 
 e.printStackTrace（）; 
} catch（TransformerException e）{
 System.out.println（ERROR DOC 6）; 
 e.printStackTrace（）; 
} 
} 
 
 public void InputStreamAFile（File pdffile，InputStream entrada）{
 try {
 OutputStream salida = new FileOutputStream（pdffile）; 
 byte [] buf = new byte [1024]; // Actualizado me olvide del 1024 
 int len; 
 while（（len = entrada.read（buf））> 0）{
 salida.write（buf，0，len）; 
} 
 salida.close（）; 
 entrada.close（）; 
 System.out.println（Se realizo la conversion con exito）; 
} catch（FileNotFoundException e）{
 System.out.println（ERROR DOC 1）; 
 e.printStackTrace（）; 
} catch（IOException e）{
 System.out.println（ERROR DOC 2）; 
 e.printStackTrace（）; 
} 
} 
}

p>

I'm using eclipse + java. I have a method for execute instructions from console. Copied & pasted from internet...

public void viewPDF(String cmd){

    try {

        Process p = Runtime.getRuntime().exec( cmd);

        BufferedReader in = new BufferedReader(
                            new InputStreamReader(p.getInputStream()));
        String line = null;
        while ((line = in.readLine()) != null) {
            System.out.println(line);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}

If I execute this code in console cmd all is Ok.

C:\fop-0.93\fop -xml C:\document.xml -xsl C:\document.xsl -pdf C:\document.pdf -d

but if I try to execute from java method it doesn't work, because I can't capture the console output.

The console is waiting and finally I need stop with the red button...

Someone can capture the console output? with other process I can (.bat, file read, etc...) but capture fop output it's impossible.

PD: Sorry for my english... :(

Thanks!!!

解决方案

Finally, instead of running fop from console and capture its output, I have made a java program that creates the pdf.

Someone in this post:

Fop exception when FopFactory.newInstance()

says

FWIW, FOP is just a java library. You dont want to execute it as external process, just use STI API. See for example code.google.com/p/fop-maven-plugin/source/browse/... for an example how to fo that. - Gyro Gearless Aug 30 at 21:27

this is the class I created "inspired": D other: 

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.stream.StreamSource;

import org.apache.fop.apps.FOPException;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.MimeConstants;

public class ConstructorFOP {

    private InputStream inputStream;

    public void xmlToPdf(String RUTA_XML, String RUTA_XSL, String RUTA_PDF) {

        try {
            System.out.println("Preparing...");

            // Setup directories
            File baseDir = new File("C:");
            File outDir = new File(baseDir, "out");
            outDir.mkdirs();

            File xmlfile = new File(RUTA_XML);
            File xsltfile = new File(RUTA_XSL);
            File pdffile = new File(RUTA_PDF);

            System.out.println("Input XML : " + xmlfile);
            System.out.println("Input XSL : " + xsltfile);
            System.out.println("OutputPDF : " + pdffile);
            System.out.println("");
            System.out.println("Transforming...");

            // configure fopFactory as desired
            final FopFactory fopFactory = FopFactory.newInstance();

            FOUserAgent foUserAgent = fopFactory.newFOUserAgent();
            // configure foUserAgent as desired

            ByteArrayOutputStream out = new ByteArrayOutputStream();

            TransformerFactory tFactory = TransformerFactory.newInstance();

            Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, out);

            // Setup input
            Source src = new StreamSource(xmlfile);

            // Setup Transformer
            Source xsltSrc = new StreamSource(xsltfile);
            Transformer transformer = tFactory.newTransformer(xsltSrc);

            // Make sure the XSL transformation's result is piped through to FOP
            Result res = new SAXResult(fop.getDefaultHandler());
            transformer.transform(src, res);

            ByteArrayOutputStream baos = out;
            inputStream = new ByteArrayInputStream(baos.toByteArray());

            InputStreamAFile(pdffile, inputStream);
        } catch (FOPException e) {
            System.out.println("ERROR DOC 3");
            e.printStackTrace();
        } catch (TransformerConfigurationException e) {
            System.out.println("ERROR DOC 4");
            e.printStackTrace();
        } catch (TransformerFactoryConfigurationError e) {
            System.out.println("ERROR DOC 5");
            e.printStackTrace();
        } catch (TransformerException e) {
            System.out.println("ERROR DOC 6");
            e.printStackTrace();
        }
    }

    public void InputStreamAFile(File pdffile, InputStream entrada) {
        try {
            OutputStream salida = new FileOutputStream(pdffile);
            byte[] buf = new byte[1024];// Actualizado me olvide del 1024
            int len;
            while ((len = entrada.read(buf)) > 0) {
                salida.write(buf, 0, len);
            }
            salida.close();
            entrada.close();
            System.out.println("Se realizo la conversion con exito");
        } catch (FileNotFoundException e) {
            System.out.println("ERROR DOC 1");
            e.printStackTrace();
        } catch (IOException e) {
            System.out.println("ERROR DOC 2");
            e.printStackTrace();
        }
    }
}

Thanks!!!

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08-23 09:42
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