OAF_文件系列6_实现OAF导出XML文件javax.xml.parsers/transformer（案例）

 20150803 Created By BaoXinjian

一、摘要

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通过javax.xml.parsers和javax.xml.parsers产生XML文件

此过程需要用到一些包方法

1. File：创建XML文件

2. DocumentBuilderFactory / DocumentBuilder ： 创建XML文件，并创建根节点

3. 创建节点

3.1 document.createElement：创建节点

3.2 document.createTextNode("INTERAL")：设置节点文本

3.3 element.appendChild(empnum)：设置节点属性

 

二、实现分析

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1. 创建exportEmployee.java程序

 

 

2. 实现解析的主要过程

package bxj.oracle.apps.ap.java;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.transform.OutputKeys;
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.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

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


public class exportEmployeeXML {

    private void ExportEmployeeXML() {
    
        try 
        {
          //创建文件
          File empxmlfile = new File("/u2/VIS/visappl/gavin/employeexml/employeewxml.xml");
          DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
          DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
          Document doc = docBuilder.newDocument();
          
          //创建根节点
          Element root = doc.createElement("Header"); 
          doc.appendChild(root);
          
          //创建EMPLOYEE节点
          Element emp = doc.createElement("EMPLOYEE"); 
          root.appendChild(emp); 
          
          //创建EMPLOYEE明细节点
          Element empid = doc.createElement("EMPLOYEEID"); 
          emp.appendChild(empid);
          Text empid_text = doc.createTextNode("1"); 
          empid.appendChild(empid_text);
          
          Element empnum = doc.createElement("EMPLOYEENUM"); 
          emp.appendChild(empnum);
          Text empnum_text = doc.createTextNode("FS_0001"); 
          empnum.appendChild(empnum_text);
          
          Element empname = doc.createElement("EMPLOYEENAME"); 
          empname.setAttribute("GENDER","MALE");
          emp.appendChild(empname);
          Text empname_text = doc.createTextNode("BaoXinjian"); 
          empname.appendChild(empname_text);
          
          Element emptype = doc.createElement("EMPLOYEETYPE"); 
          emp.appendChild(emptype);
          Text emptype_text = doc.createTextNode("INTERAL"); 
          emptype.appendChild(emptype_text);
          
          Element empcountry = doc.createElement("COUNTRY"); 
          emp.appendChild(empcountry);
          Text empcountry_text = doc.createTextNode("CN"); 
          empcountry.appendChild(empcountry_text);
          
          Element empaddr = doc.createElement("ADDRESS"); 
          emp.appendChild(empaddr);
          Text empaddr_text = doc.createTextNode("Hangzhou"); 
          empaddr.appendChild(empaddr_text);
          
          Element empdesc = doc.createElement("DESCRIPTION"); 
          emp.appendChild(empdesc);
          Text empdesc_text = doc.createTextNode("Test Employee XML Export"); 
          empdesc.appendChild(empdesc_text);
          
          //打开文件流
          FileOutputStream fos = new FileOutputStream(empxmlfile); 
          OutputStreamWriter osw = new OutputStreamWriter(fos); 
          callDomWriter(doc, osw, "UTF-8"); 
          osw.close(); 
          fos.close(); 
        }
        catch (Exception ex)
        {
          ex.printStackTrace();
        }   
    }
    
    //文件转换
    public void callDomWriter(Document doc, Writer writer, String encoding) { 
        try 
        { 
          Source source = new DOMSource(doc); 
          Result res = new StreamResult(writer); 
          Transformer xformer = TransformerFactory.newInstance().newTransformer(); 
          xformer.setOutputProperty(OutputKeys.ENCODING, encoding); 
          xformer.transform(source, res); 
        }catch (TransformerConfigurationException e) { 
           e.printStackTrace(); 
        } catch (TransformerException e) { 
           e.printStackTrace(); 
        }              
     } 

    public exportEmployeeXML() {
    }

    public static void main(String[] args) {
        System.out.println("gavin main Start");
        exportEmployeeXML exportEmployeeXML = new exportEmployeeXML();    
        exportEmployeeXML.ExportEmployeeXML();
        System.out.println("gavin main End");
    }
}

 

三、运行测试

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1. 运行测试

 

 2. 确定是否在本地所创建的XML文件

 

3. 查看所常见的XML文件，并无问题

 

Thanks and Regards