AXIOM 读写 xml文件

• 什么是AXIOM?

Axiom ,也就是Axis Object Model
Axis2用Axiom处理soap文档和soap信息。

• Axiom的一些特性：

1. Lightweight（轻量），更少的内存需要。
2. Deferred building（延迟构建）
3. Pull based（pull模式），OM基于StAX－－标准的pull parser API。

• pull模式

Axiom采用pull解析方式，基于StAX（JSR173）。
SAX和DOM 都是基于push的解析方式，也就是说解析控制在parser本身。
Axiom和StAX紧密相关，要使用Axiom，StAX相关的jar包也必须在classpath下。

• Axiom读XML：

1.需要的包

axiom-api-1.2.8.jar

包含javax.xml.*的 包 JDK中就有javax.xml.*的包,但一定不要使用他们,所以一定要把AXIS2下的此包加入buildPath,如果不加入,系统也不报错,因为会从JDK中找到,但这样使用JDK的包就会在运行的时候出异常

2.范例test1.xml 文件(用于下面的读写)

<?xml version="1.0" encoding="UTF-8"?> <fool> <student> <name>mac</name> <id>12</id> <age>33</age> <sex>male</sex> </student> <student> <name>silly</name> <id>5</id> <age>12</age> <sex>female</sex> </student> <teacher> <name>Mr. Jones</name> <id>2</id> <age>31</age> <sex>male</sex> </teacher> <student> <name>macy</name> <id>2</id> <age>40</age> <sex>female</sex> </student> <student> <name>tom</name> <id>32</id> <age>31</age> <sex>male</sex> </student> <message>hello world</message> </fool>

3.简单读-----直接匹配name去读

// 首先对具体的xml文件构建parser FileInputStream xmlFile = new FileInputStream("test1.xml"); XMLStreamReader parser = XMLInputFactory.newInstance().createXMLStreamReader(xmlFile); // 还需要StAXOMBuilder对象 StAXOMBuilder builder = new StAXOMBuilder(parser); OMElement doc = builder.getDocumentElement(); // 读到<fool></fool> OMElement cre = doc.getFirstChildWithName(new QName("student")); //读到<student> OMElement cre1 = cre.getFirstChildWithName(new QName("id")); // 读到<id></id> System.out.println(cre1.getLocalName()+":"+cre1.getText()); cre1 = cre.getFirstChildWithName(new QName("name")); // 读到<name></name> System.out.println(cre1.getLocalName()+":"+cre1.getText()); cre1 = cre.getFirstChildWithName(new QName("age")); // 读到<age></age> System.out.println(cre1.getLocalName()+":"+cre1.getText()); cre1 = cre.getFirstChildWithName(new QName("sex")); // 读到<sex></sex> System.out.println(cre1.getLocalName()+":"+cre1.getText());

结果: id:12 name:mac age:33 sex:male

4.复杂读-----getChild

FileInputStream xmlFile = new FileInputStream("test1.xml"); XMLStreamReader parser = XMLInputFactory.newInstance().createXMLStreamReader(xmlFile); StAXOMBuilder builder = new StAXOMBuilder(parser); OMElement doc = builder.getDocumentElement(); Iterator<OMElement> iter = doc.getChildElements(); while(iter.hasNext()){ OMElement temp = iter.next(); System.out.println("===================="); System.out.println(temp.getLocalName()); System.out.println(temp.getText()); if(temp.getLocalName().equals("student")){ Iterator<OMElement> iter1 = temp.getChildElements(); System.out.println("----------------"); while(iter1.hasNext()){ OMElement temp1 = iter1.next(); System.out.println(temp1.getLocalName()+":"+temp1.getText()); } } }

结果: ==================== student ---------------- name:mac id:12 age:33 sex:male ==================== student ---------------- name:silly id:5 age:12 sex:female ==================== teacher ==================== student ---------------- name:macy id:2 age:40 sex:female ==================== student ---------------- name:tom id:32 age:31 sex:male ==================== message hello world

• Axiom写XML：

简单方式(基本方式,无ns,无attribute)

1.建立节点 // 通常通过OMFactory来构造XML文档中的element OMFactory factory = OMAbstractFactory.getOMFactory(); //建立doc节点,doc节点会和下面的root节点合并 OMDocument doc = factory.createOMDocument(); //建立root节点 OMElement root = factory.createOMElement(new QName("root")); //建立两个普通节点 OMElement stu = factory.createOMElement(new QName("student")); stu.addChild(factory.createOMText("mac")); OMElement tea = factory.createOMElement(new QName("teacher")); tea.addChild(factory.createOMText("silly"));

2.构建树 //构建树,将两个普通节点连到root节点上 root.addChild(stu); root.addChild(tea); //构建树,将root节点连到doc节点上 doc.addChild(root);

3. 写入文件 // 构建writer做输出器 XMLStreamWriter writer = XMLOutputFactory.newInstance().createXMLStreamWriter( new FileOutputStream("2.xml")); root.serialize(writer); // cache on writer.flush();

4. 看结果 "2.xml" <root><student>mac</student><teacher>silly</teacher></root> 此文件缺陷: 1.没有xml页首的<?xml version="1.0" encoding="UTF-8"?> 2.没有回车换行

5.试着用AXIOM读 FileInputStream xmlFile = new FileInputStream("2.xml"); XMLStreamReader parser = XMLInputFactory.newInstance().createXMLStreamReader(xmlFile); StAXOMBuilder builder = new StAXOMBuilder(parser); OMElement doc = builder.getDocumentElement(); Iterator<OMElement> iter = doc.getChildElements(); while(iter.hasNext()){ OMElement temp = iter.next(); System.out.println("===================="); System.out.println(temp.getLocalName()+":"+temp.getText()); } 结果: ==================== student:mac ==================== teacher:silly

Axiom写XML,复杂方式

1. 构建节点 // 通常通过OMFactory来构造XML文档中的element OMFactory factory = OMAbstractFactory.getOMFactory(); // 建立 namespace OMNamespace ns = factory.createOMNamespace("http://demo.axiom","x"); OMNamespace ns1 = factory.createOMNamespace("http://ot.demo.axiom","y"); //建立doc节点,doc节点会和下面的root节点合并 OMDocument doc = factory.createOMDocument(); //建立root节点 OMElement root = factory.createOMElement("root",ns); //建立两个普通节点 OMElement stu = factory.createOMElement("student",ns1); stu.addChild(factory.createOMText("mac")); OMElement tea = factory.createOMElement("teacher", "http://namespace", "ns"); tea.addChild(factory.createOMText("silly"));

2.构建树 //构建树,将两个普通节点连到root节点上 root.addAttribute(factory.createOMAttribute("attr", ns, "hello world")); root.addChild(stu); root.addChild(tea); //构建树,将root节点连到doc节点上 doc.addChild(root);

3. 输出到文件或打印到屏幕 // 构建writer做输出器 XMLStreamWriter writer = XMLOutputFactory.newInstance().createXMLStreamWriter( new FileOutputStream("2.xml")); root.serialize(writer); // cache on writer.flush();

4. 生成xml如下: <x:root xmlns:x="http://demo.axiom" x:attr="hello world"><y:student xmlns:y="http://ot.demo.axiom">mac</y:student><ns:teacher xmlns:ns="http://namespace">silly</ns:teacher></x:root>

5.试着用AXIOM读 FileInputStream xmlFile = new FileInputStream("2.xml"); XMLStreamReader parser = XMLInputFactory.newInstance().createXMLStreamReader(xmlFile); StAXOMBuilder builder = new StAXOMBuilder(parser); OMElement doc = builder.getDocumentElement(); Iterator<OMElement> iter = doc.getChildElements(); while(iter.hasNext()){ OMElement temp = iter.next(); System.out.println("===================="); System.out.println(temp.getLocalName()+":"+temp.getText()); } 结果: ==================== student:mac ==================== teacher:silly 转自：http://blog.sina.com.cn/s/blog_6151984a0100lq9p.html