读取本地文件

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用javax.xml、w3c解析

package cn.com.xinli.monitor.utils;import org.w3c.dom.Document;import org.w3c.dom.Element;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import java.io.File;/** * Created by jiyy on 2017/4/6. */public class ReadXmlTest {    public static void main(String[] args){        Element element = null;        // 可以使用绝对路劲        File f = new File("D:/workspace-idea/monitor-service/src/main/resources/logMonitor.xml");        // documentBuilder为抽象不能直接实例化(将XML文件转换为DOM文件)        DocumentBuilder db = null;        DocumentBuilderFactory dbf = null;        try {            // 返回documentBuilderFactory对象            dbf = DocumentBuilderFactory.newInstance();            // 返回db对象用documentBuilderFatory对象获得返回documentBuildr对象            db = dbf.newDocumentBuilder();            // 得到一个DOM并返回给document对象            Document dt = db.parse(f);            // 得到一个elment根元素            element = dt.getDocumentElement();            // 获得根节点            System.out.println("根元素：" + element.getNodeName());        }catch (Exception e ){            e.printStackTrace();        }    }}

用dom4j解析

package cn.com.xinli.monitor.test;import org.apache.commons.io.IOUtils;import org.dom4j.Document;import org.dom4j.DocumentException;import org.dom4j.DocumentHelper;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.net.URISyntaxException;/** * Created by jiyy on 2017/4/6. */public class ReadFileTest {    public static void  main(String[] args){        //方法一：本地绝对路径获取xml文件内容，项目外的路径        String fileUrl = "/D:/workspace-idea/monitor-service/src/main/resources/logMonitor.xml";        InputStream fis = null;        try {            fis = new FileInputStream(new File(fileUrl));            String content = IOUtils.toString(fis,"UTF-8");            Document document = DocumentHelper.parseText(content);        } catch (java.io.IOException e) {            e.printStackTrace();        } catch (DocumentException e) {            e.printStackTrace();        }        //方法二:项目绝对路径是在本class文件所在项目的根目录下找，也就是classes/下        try {            String content2 = IOUtils.toString(ReadFileTest.class.getResourceAsStream("/logMonitor.xml"), "UTF-8");            Document document2 = DocumentHelper.parseText(content2);        } catch (IOException e) {            e.printStackTrace();        }catch (DocumentException e) {            e.printStackTrace();        }        //方法三：相对目录，在本ReadFileTest编译后的.class文件同级目录        try {            String content3 = IOUtils.toString(ReadFileTest.class.getResourceAsStream("logMonitor.xml"), "UTF-8");            Document document3 = DocumentHelper.parseText(content3);        } catch (IOException e) {            e.printStackTrace();        }catch (DocumentException e) {            e.printStackTrace();        }        //方法四：相对目录，在本ReadFileTest编译后的.class文件上级目录的config目录下        try {            String content4 = IOUtils.toString(ReadFileTest.class.getResourceAsStream("../config/logMonitor.xml"), "UTF-8");            Document document4 = DocumentHelper.parseText(content4);        } catch (IOException e) {            e.printStackTrace();        }catch (DocumentException e) {            e.printStackTrace();        }        //方法五：动态获取相对目录        try {            String xmlPath = "logMonitor.xml";            //获取当前类加载的根目录，如：/C:/Program Files/Apache/Tomcat 6.0/webapps/fee/WEB-INF/classes/            String path = ReadFileTest.class.getClassLoader().getResource("").toURI().getPath();            // 把文件读入文件输入流，存入内存中            FileInputStream in = new FileInputStream(new File(path + xmlPath));            String content5 = IOUtils.toString(in,"UTF-8");            Document document5 = DocumentHelper.parseText(content5);        } catch (IOException e) {            e.printStackTrace();        } catch (DocumentException e) {            e.printStackTrace();        }catch (URISyntaxException e) {            e.printStackTrace();        }    }}

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