csv文件被app占用但不会被返回

时间:2014-01-24 09:57:16

标签: java xml csv mule

我现在正在接受培训。我在mule studio中有以下代码,这只是java端。我认为这就是问题所在。

就像说的那样,csv文件来自它所在的文件夹,但它没有到达输出文件夹。欢迎任何建议或提示(如果已经工作了将近15个小时。)

package com.csvToXml.common;

import net.sf.flatpack.DefaultDataSet;
import net.sf.flatpack.DefaultParserFactory;
import net.sf.flatpack.Parser;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.StringReader;
import java.io.StringWriter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.BufferedReader;

import org.w3c.dom.Document;
import org.w3c.dom.Element;




public class CsvConverter {


  public static int numberOfRows;
    public static int rowNumber = 0;
    public static int columnNumber = 0;


 private static char delimiter = ',';
 private static char qualifier = '"';
 private static boolean ignoreFirstRecord = true;

 public CsvConverter() {

 }

 public String convert(String csv)  {
  StringReader sr = new StringReader(csv);
  FileReader fr = null;

  //Get the configuration file for csv processing
  try {
   fr = new       FileReader("/users/jacqueslecoq/MuleStudio/workspace/stock/flows/usermap.xml");
  } catch (FileNotFoundException e) {   
   e.printStackTrace();
  }

  //The csv parser
  Parser p = DefaultParserFactory.getInstance().newDelimitedParser(fr, sr,delimiter,   qualifier, ignoreFirstRecord);

  DefaultDataSet d = (DefaultDataSet) p.parse();

  //Build the xml
  DocumentBuilderFactory dFact = DocumentBuilderFactory.newInstance();
        DocumentBuilder build;
        Document doc=null;
  try {
   build = dFact.newDocumentBuilder();

        doc = build.newDocument();
  } catch (ParserConfigurationException e) {

   e.printStackTrace();
  }
        Element root = doc.createElement("root");
         doc.appendChild(root);

        Element Details = doc.createElement("rows");
        root.appendChild(Details);


  while (d.next()) {

    String[] colums = d.getColumns();
    for(int i=0; i<colums.length;i++ ){
     Element name = doc.createElement(colums[i]);
              name.appendChild(doc.createTextNode(d.getString(colums[i])));
              Details.appendChild(name);
    }

  }
  TransformerFactory tf = TransformerFactory.newInstance();
  Transformer transformer=null;
  StringWriter writer = null;

  try {
   transformer = tf.newTransformer();
   writer = new StringWriter();
   transformer.transform(new DOMSource(doc), new StreamResult(writer));
  } catch (TransformerConfigurationException e) {

   e.printStackTrace();
  } catch (TransformerException e) {

   e.printStackTrace();
  }


  String output = writer.getBuffer().toString();

  return output;

 }

1 个答案:

答案 0 :(得分:0)

因为您没有提供足够的信息来帮助您,所以我会给您随机的一般建议:)

因为你在骡子,有些事情你应该让骡子做而不是自己编码。例如,应该删除执行DOM到XML转换的方法的所有末尾,并替换为在组件之后添加的<mulexml:dom-to-xml-transformer />

另外,我想象usermap.xml,因为它在你的项目中。如果是这种情况,为什么每次加载?您可以在CsvConverter()中预加载一次。并且不要像这样硬编码文件路径,在Mule中部署应用程序时永远不会工作。相反,将usermap.xml放入src/main/resources并将其作为类路径资源加载Thread.currentThread().getContextClassloader().getResourceAsStream("usermap.xml")

PS。什么'顶部的所有静态变量?如果他们是不变的,那么也要做最后的决定。并为常量命名THE_JAVA_WAY