android sax creates xml file

The first two articles briefly explain the way sax parses xml and implement the parsing function. Next use sax to create the xml file.

Specifically how to use sax to create xml, add relevant comments in the program, or directly enter the code.

package cn.com.sax;

import java.io.OutputStream;
import java.io.StringWriter;

import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TransformerHandler;
import javax.xml.transform.stream.StreamResult;

import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;

import android.util.Log;

class SxaCreateXml {
    /**
     * SAX方式生成XML
     *
     * @param list
     * @return
     */
    public String saxToXml(OutputStream output) {
        String xmlStr = null;
        try {
            // 用来生成XML文件
            // 实现此接口的对象包含构建转换结果树所需的信息
            Result resultXml = new StreamResult(output);

            // 用来得到XML字符串形式
            // 一个字符流，可以用其回收在字符串缓冲区中的输出来构造字符串
            StringWriter writerStr = new StringWriter();
            // 构建转换结果树所需的信息。
            Result resultStr = new StreamResult(writerStr);

            // 创建SAX转换工厂
            SAXTransformerFactory sff = (SAXTransformerFactory) SAXTransformerFactory
                    .newInstance();
            // 转换处理器，侦听 SAX ContentHandler
            // 解析事件，并将它们转换为结果树 Result
            TransformerHandler th = sff.newTransformerHandler();
            // 将源树转换为结果树
            Transformer transformer = th.getTransformer();
            // 设置字符编码
            transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
            // 是否缩进
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");

            // 设置与用于转换的此 TransformerHandler 关联的 Result
            // 注：这两个th.setResult不能同时启用
             th.setResult(resultXml);
//           th.setResult(resultStr);
            //创建根元素<calsses>,并设置其属性为空
            th.startDocument();
            AttributesImpl attr = new AttributesImpl();
            th.startElement("", "calsses", "calsses", attr);

            //创建一级子元素<group>,并设置其属性
            attr.clear();
            attr.addAttribute("","name", "name", "", "一年级");
            attr.addAttribute("","num", "num", "", "10");
            th.startElement("", "", "group", attr);
            //创建二级子元素<person>,并设置其属性
            attr.clear();
            attr.addAttribute("","name", "name", "", "小明");
            attr.addAttribute("","age", "age", "", "7");
            th.startElement("", "", "person", attr);
            //创建三级子元素<chinese>,并设置其值
            attr.clear();
            th.startElement("", "", "chinese", attr);
            th.characters("语文90".toCharArray(), 0, "语文90".length());
            th.endElement("", "", "chinese");
            //创建三级子元素<english>,并设置其值
            th.startElement("", "", "english", attr);
            th.characters("英语80".toCharArray(), 0, "英语80".length());
            th.endElement("", "", "english");

            th.endElement("", "", "person");
            th.endElement("", "", "group");
            th.endElement("", "calsses", "calsses");
            th.endDocument();
            xmlStr = writerStr.getBuffer().toString();
        } catch (TransformerConfigurationException e) {
            Log.e("TEST", ""+e.toString());
        } catch (SAXException e) {
            Log.e("TEST", ""+e.toString());
        } catch (Exception e) {
            Log.e("TEST", ""+e.toString());
        }
        Log.e("TEST","生成的"+xmlStr);
        return xmlStr;
    }
}

Call this method to achieve the purpose of creating xml files.

new SxaCreateXml().saxToXml(openFileOutput("sax.xml",  Context.MODE_PRIVATE));

The generated sax.xml file is still in the data/data/cn.xxx.xxx/files folder.

<?xml version="1.0" encoding="UTF-8"?>

<calsses>
<group name="一年级" num="10">
<person name="小明" age="7">
<chinese>语文90</chinese>
<english>英语80</english>
</person>
</group>
</calsses>

The above is the content of the xml file created by android sax. For more related content, please pay attention to the PHP Chinese website (www.php.cn)!