Sax 解析 XMl

最近工作中遇到了解析xml文件问题，xpath < SAX < spring-oxm， 

遂记录下来

代码结构：

package com.example.demo.sax.common;

import java.util.ArrayList;
import java.util.List;

import com.example.demo.sax.model.User;
import lombok.Builder;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class XmlParseHandler extends DefaultHandler {
 // xml片段内容
 private StringBuilder sb = new StringBuilder();
 // 片段名称
 private String strTag = "";
 // 开始时间
 long starTime;
 // 结束时间
 long endTime;
 // 开始记录
 private boolean bolStartRecordFlg = false;

 public XmlParseHandler(String tag) {
 this.strTag = tag;
 }

 /**
 * 文档解析开始调用
 */
 @Override
 public void startDocument() throws SAXException {
 starTime = System.currentTimeMillis();
 System.out.println("开始读取文档：" + starTime);
 }

 /**
 * 文档解析结束后调用
 */
 @Override
 public void endDocument() throws SAXException {
 endTime = System.currentTimeMillis();
 System.out.println("结束读取文档：" + endTime);
 System.out.println("用时：" + (endTime - starTime));
 }


 @Override
 public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {

 if (qName.equals(strTag)) {
 bolStartRecordFlg = true;
 }
 if (bolStartRecordFlg) {
 sb.append("<" + qName + ">");
 }

 }

 @Override
 public void endElement(String uri, String localName, String qName) throws SAXException {

 if (bolStartRecordFlg) {
 sb.append("</" + qName + ">");
 }
 if (qName.equals(strTag)) {
 bolStartRecordFlg = false;
 //System.out.println(sb.toString());
 doSomething(sb.toString());
 sb.delete(0,sb.length());
 }
 }

 @Override
 public void characters(char[] ch, int start, int length) throws SAXException {
 if(bolStartRecordFlg){
 sb.append(new String(ch,start,length));
 }
 }

 public void doSomething(String strXml){

 }
}

package com.example.demo.sax.handler;

import com.example.demo.sax.common.XmlParseHandler;

import java.util.ArrayList;

public class Handler extends XmlParseHandler {
    private ArrayList<String> arrayList ;

 public Handler(ArrayList<String> arrayList, String tag) {
 super(tag);
 this.arrayList = arrayList;
 }

 @Override
 public void doSomething(String strXml) {
 arrayList.add(strXml);
 }
}

package com.example.demo.sax;

import com.example.demo.sax.handler.Handler;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import java.util.ArrayList;

@Configuration
public class TestSAX {

 private static String file= "D:\\WorkSpace\\sax\\src\\main\\resources\\xml\\users.xml";

 public static void main(String[] args) throws Exception{
 ArrayList<String> arrayList = new ArrayList<String>();
 SAXParserFactory factory = SAXParserFactory.newInstance();
 SAXParser parser = factory.newSAXParser();
 parser.parse(file,new Handler(arrayList,"user"));
 arrayList.toString();
 }

}

pom文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 <modelVersion>4.0.0</modelVersion>

 <groupId>com.example.demo</groupId>
 <artifactId>sax</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <packaging>jar</packaging>

 <name>sax</name>
 <description>Demo project for Spring Boot</description>

 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>2.0.3.RELEASE</version>
 <relativePath/> <!-- lookup parent from repository -->
 </parent>

 <properties>
 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 <java.version>1.8</java.version>
 </properties>

 <dependencies>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter</artifactId>
 </dependency>

 <dependency>
 <groupId>org.projectlombok</groupId>
 <artifactId>lombok</artifactId>
 <optional>true</optional>
 </dependency>

 <dependency>
 <groupId>org.springframework</groupId>
 <artifactId>spring-oxm</artifactId>
 <version>3.0.5.RELEASE</version>
 </dependency>

 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-test</artifactId>
 <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build></project>