使用SAX读取XML文件--（将信息封装到对象）

来源：互联网发布：服装工厂erp软件编辑：程序博客网时间：2024/06/15 22:43

实现功能：使用SAX读取contact.xml文件，并将读取到的信息封装到对象中，然后输出；

XML文件：contact.xml

<?xml version="1.0" encoding="utf-8"?><contactList><contact id="001" name="eric"><name>张三</name><age>20</age><phone>134222223333</phone><email>zhangsan@qq.com</email><qq>432221111</qq></contact><contact id="002" name="jacky"><name>eric</name><age>20</age><phone>134222225555</phone><email>lisi@qq.com</email><qq>432222222</qq></contact></contactList>

对象类：Contact.java

package SAX;public class Contact {public String id;public String name;public String age;public String phone;public String email;public String qq;public String getId() {return id;}public void setId(String id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAge() {return age;}public void setAge(String age) {this.age = age;}public String getPhone() {return phone;}public void setPhone(String phone) {this.phone = phone;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}public String getQq() {return qq;}public void setQq(String qq) {this.qq = qq;}@Overridepublic String toString() {return "Contact [age=" + age + ", email=" + email + ", id=" + id+ ", name=" + name + ", phone=" + phone + ", qq=" + qq + "]";}}

SAX的处理程序：MyDefaultHandler3.java

package SAX;import java.util.ArrayList;import java.util.List;import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;/* * SAX的处理程序 */public class MyDefaultHandler3 extends DefaultHandler {//存储所有的联系人的对象private List<Contact> list = new ArrayList<Contact>();public List<Contact> getList() {return list;}//保存一个联系人信息private Contact contact;//用于临时存储当前读到的标签名private String curTag;/* *思路： *1）创建Contact对象 *2）  把每个contact标签内容存入到Contact对象 *3）把Contact对象放到List中 */public void startElement(String uri, String localName, String qName,Attributes attributes) throws SAXException {curTag = qName;//读取到contact的开始标签创建Contact对象if("contact".equals(qName)) {contact = new Contact();//设置id值contact.setId(attributes.getValue("id"));}}@Overridepublic void characters(char[] ch, int start, int length)throws SAXException {//当前文本内容String content = new String(ch,start,length);if("name".equals(curTag)) {contact.setName(content);}if("age".equals(curTag)) {contact.setAge(content);}if("phone".equals(curTag)) {contact.setPhone(content);}if("email".equals(curTag)) {contact.setEmail(content);}if("qq".equals(curTag)) {contact.setQq(content);}}@Overridepublic void endElement(String uri, String localName, String qName)throws SAXException {//设置空是为了避免空格和换行设置到对象时属性中curTag = null;//读到contact的结束标签放入List中if("contact".equals(qName)) {list.add(contact);}}}

主程序：Demo_sax2.java

package SAX;import java.io.File;import java.util.List;import javax.xml.parsers.ParserConfigurationException;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.xml.sax.SAXException;public class Demo_sax2 {public static void main(String[] args) throws Exception {SAXParser parser = SAXParserFactory.newInstance().newSAXParser();MyDefaultHandler3 handler = new MyDefaultHandler3();parser.parse(new File("./src/contact.xml"), handler);List<Contact> list = handler.getList();for(Contact contact : list) {System.out.println(contact);}}}

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