Java操作XML(4)--使用woodstox处理XML
2021-03-05 01:26
标签：sch class efi filter html 代码 rac element tin Woodstox是一个快速、开源的StAX实现；被视为执行效果最佳的StAX实现之一。本文主要介绍使用Woodstox来理XML，文中所使用到的软件版本：Java 1.8.0_191、woodstox-core-asl 4.4.1。 该例子演示如何使用Woodstox来解析XML以及使用Woodstox来生成XML。 Java操作XML(4)--使用woodstox处理XML 标签：sch class efi filter html 代码 rac element tin 原文地址：https://www.cnblogs.com/wuyongyin/p/14333642.html1、引入依赖
dependency>
groupId>org.codehaus.woodstoxgroupId>
artifactId>woodstox-core-aslartifactId>
version>4.4.1version>
dependency>
2、Java代码例子
package com.abc.demo.general.xml;
import org.codehaus.stax2.*;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.xml.namespace.QName;
import javax.xml.stream.*;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.XMLEvent;
/**
* 使用Woodstox处理xml
*/
public class WoodstoxCase {
private static Logger logger = LoggerFactory.getLogger(WoodstoxCase.class);
/**
* 基于光标的方式解析xml
* @throws Exception
*/
@Test
public void parse() throws Exception {
XMLInputFactory2 factory = (XMLInputFactory2)XMLInputFactory2.newFactory();
XMLStreamReader2 reader = (XMLStreamReader2)factory.createXMLStreamReader(WoodstoxCase.class.getResourceAsStream("student.xml"));
//添加过滤器
XMLStreamReader2 filterReader = (XMLStreamReader2)factory.createFilteredReader(reader, new StreamFilter() {
@Override
public boolean accept(XMLStreamReader reader) {
//处理开始节点
if (reader.isStartElement()) {
return true;
}
return false;
}
});
while (filterReader.hasNext()) {
int type = filterReader.next();
if (type == XMLStreamReader.START_ELEMENT) {
if ("student".equals(reader.getName().getLocalPart())) {
logger.info("rollno:" + reader.getAttributeValue("", "rollno"));
} else if ("firstname".equals(reader.getName().getLocalPart())
|| "lastname".equals(reader.getName().getLocalPart())
|| "nickname".equals(reader.getName().getLocalPart())
|| "marks".equals(reader.getName().getLocalPart())) {
logger.info(reader.getName().getLocalPart() + ":" + reader.getElementText());
} else {
continue;
}
}
// else if (type == XMLStreamReader.CHARACTERS){
// logger.info(reader.getText());
//
// } else if (type == XMLStreamReader.END_ELEMENT) {
// logger.info("END_ELEMENT:" + reader.getName().getLocalPart() + ">");
// }
}
}
/**
* 基于迭代模型的方式解析xml
* @throws Exception
*/
@Test
public void parse2() throws Exception {
XMLInputFactory2 factory = (XMLInputFactory2)XMLInputFactory.newInstance();
XMLEventReader2 reader = (XMLEventReader2)factory.createXMLEventReader(WoodstoxCase.class.getResourceAsStream("student.xml"));
//添加过滤器
XMLEventReader2 filterReader = (XMLEventReader2)factory.createFilteredReader(reader, event -> {
//处理开始节点
if (event.isStartElement()) {
return true;
}
return false;
});
while (filterReader.hasNext()) {
XMLEvent event = filterReader.nextEvent();
if (event.isStartElement()) {
if ("student".equals(event.asStartElement().getName().getLocalPart())) {
logger.info("rollno:" + event.asStartElement().getAttributeByName(new QName("", "rollno")).getValue());
Attribute attributeTestattr = event.asStartElement().getAttributeByName(new QName("http://www.w3.org/TR/html4/school/", "testattr"));
if (attributeTestattr != null) {
logger.info("testattr:" + attributeTestattr.getValue());
}
} else if ("firstname".equals(event.asStartElement().getName().getLocalPart())
|| "lastname".equals(event.asStartElement().getName().getLocalPart())
|| "nickname".equals(event.asStartElement().getName().getLocalPart())
|| "marks".equals(event.asStartElement().getName().getLocalPart())) {
logger.info(event.asStartElement().getName().getLocalPart() + ":" + filterReader.getElementText());
} else {
continue;
}
}
}
}
/**
* 生成xml
* @throws Exception
*/
@Test
public void toXml() throws Exception {
XMLOutputFactory2 factory = (XMLOutputFactory2)XMLOutputFactory2.newInstance();
XMLStreamWriter2 writer = (XMLStreamWriter2)factory.createXMLStreamWriter(System.out);
writer.writeStartDocument("UTF-8", "1.0");
writer.writeStartElement("school", "class", "http://www.w3.org/TR/html4/school/");
//第一个学生
writer.writeStartElement("school", "student", "http://www.w3.org/TR/html4/school/");
writer.writeAttribute("rollno", "1");
writer.writeAttribute("school","http://www.w3.org/TR/html4/school/", "testattr", "test");
writer.writeStartElement("school", "firstname", "http://www.w3.org/TR/html4/school/");
writer.writeCharacters("cxx1");
writer.writeEndElement();
writer.writeStartElement("lastname");
writer.writeCharacters("Bob1");
writer.writeEndElement();
writer.writeStartElement("nickname");
writer.writeCharacters("stars1");
writer.writeEndElement();
writer.writeStartElement("marks");
writer.writeCharacters("85");
writer.writeEndElement();
writer.writeEndElement();
//第二个学生
writer.writeStartElement("student");
writer.writeAttribute("rollno", "2");
writer.writeStartElement("firstname");
writer.writeCharacters("cxx2");
writer.writeEndElement();
writer.writeStartElement("lastname");
writer.writeCharacters("Bob2");
writer.writeEndElement();
writer.writeStartElement("nickname");
writer.writeCharacters("stars2");
writer.writeEndElement();
writer.writeStartElement("marks");
writer.writeCharacters("85");
writer.writeEndElement();
writer.writeEndElement();
//第三个学生
writer.writeStartElement("student");
writer.writeAttribute("rollno", "3");
writer.writeStartElement("firstname");
writer.writeCharacters("cxx3");
writer.writeEndElement();
writer.writeStartElement("lastname");
writer.writeCharacters("Bob3");
writer.writeEndElement();
writer.writeStartElement("nickname");
writer.writeCharacters("stars3");
writer.writeEndElement();
writer.writeStartElement("marks");
writer.writeCharacters("85");
writer.writeEndElement();
writer.writeEndElement();
writer.writeEndElement();
writer.writeEndDocument();
}
}
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