使用javax.xml.stream包的xml生成解析

XML文件生成与加密

最新推荐文章于 2025-07-30 14:04:12 发布

原创最新推荐文章于 2025-07-30 14:04:12 发布 · 3.8k 阅读

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#xml #exception #output #null #database #string

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本文介绍了一种使用Java实现的XML文件生成方法，通过XMLWriter类将MyDataclass中的数据写入XML文件，并利用BASE64Encoder进行加密处理。文中详细展示了如何设置XML文档的属性及如何遍历数据集合来填充XML元素。

一、XML文件的生成

说明：

XMLWriter ：读取传入的数据封装类（MyDataclass ）中的数据写入到xml文件中，并用BASE64Encoder对数据进行加密。

MyDataclass ：数据封装bean.

package com.test;

import java.io.File;
import java.io.FileWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;

import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamWriter;

import org.apache.log4j.Logger;

import com.tsxd.trans.model.transdata.FieldData;
import com.tsxd.trans.model.transdata.RowData;
import com.tsxd.trans.model.transdata.TransToHospData;

public class XMLWriter {
private static final Logger logger=Logger.getLogger(XMLWriter.class);

private MyDataclass trans_data=null;
private sun.misc.BASE64Encoder base64_encode;

public XMLWriter(MyDataclass data){
  trans_data=data;
  base64_encode=new sun.misc.BASE64Encoder();
}

public boolean writeXml(String outputFileName){
  boolean result=false;
  if (null==trans_data){
   return false;
  }
  XMLOutputFactory outputFactory=XMLOutputFactory.newInstance();
  FileWriter output=null;
  XMLStreamWriter xmlWriter=null;
  long row_id=1;
  try{
   output=new FileWriter(new File(outputFileName));
   xmlWriter=outputFactory.createXMLStreamWriter(output);
   xmlWriter.writeStartDocument("GB2312","1.0");
   xmlWriter.writeStartElement("root");

   xmlWriter.writeStartElement("version");
   xmlWriter.writeCharacters("1.0");
   xmlWriter.writeEndElement();//end of version

   xmlWriter.writeStartElement("metadatas");
   xmlWriter.writeStartElement("metadata");
   SimpleDateFormat sf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
   xmlWriter.writeAttribute("generatetime",sf.format(new Date()));
   xmlWriter.writeAttribute("generate_org_code", trans_data.getGenerate_org_code());
   xmlWriter.writeAttribute("charset_encode", "GB2312");
   xmlWriter.writeAttribute("dest_org_id",trans_data.getDest_org_id());
   xmlWriter.writeEndElement(); //end of metadata
   xmlWriter.writeEndElement(); //end of metadatas

   xmlWriter.writeStartElement("data");
   xmlWriter.writeAttribute("tablename", base64_encode.encode(trans_data.getTablename().getBytes()));

   List<RowData> row_list=trans_data.getRow_datas();
   for(int i=0;i<(row_list.size());i++){
    RowData row_data=row_list.get(i);
    xmlWriter.writeStartElement("row");
    xmlWriter.writeAttribute("op", "");
    xmlWriter.writeAttribute("row_id", String.valueOf(row_id));
    List<FieldData> field_datas=row_data.getField_datas();
    for(int j=0;j<field_datas.size();j++){
     FieldData field=field_datas.get(j);
     xmlWriter.writeStartElement(base64_encode.encode(field.getField_name().getBytes()));
     xmlWriter.writeCharacters(base64_encode.encode(field.getData_value().getBytes()));
     xmlWriter.writeEndElement();//end of fieldname
    }
    row_id=row_id+1;
    xmlWriter.writeEndElement();//end of row
   }

   xmlWriter.writeEndElement(); //end of data
   xmlWriter.writeEndElement(); //end of root

   xmlWriter.close();
   output.close();

   result=true;
  }catch(Exception e){
   logger.error("产生 "+outputFileName+"时发生了错误!");
   logger.error(e.getMessage(),e);
  }finally{

   if (xmlWriter!=null){
    try{
     xmlWriter.close();
    }catch(Exception e){

    }
   }
   if (output!=null){
    try{
     output.close();
    }catch(Exception e){

    }
   }
  }

  return result;
}

}