动态修改xml（log4j.xml）文件

import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.PrintWriter;import java.io.RandomAccessFile;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory; //下面主要是org.xml.sax包的类import org.apache.log4j.FileAppender;import org.apache.log4j.Level;import org.apache.log4j.Logger;import org.apache.log4j.xml.DOMConfigurator;import org.w3c.dom.Document;import org.w3c.dom.Node;import org.w3c.dom.NodeList;import javax.xml.transform.OutputKeys;import javax.xml.transform.Transformer;import javax.xml.transform.TransformerException;import javax.xml.transform.TransformerFactory;import javax.xml.transform.dom.DOMSource;import javax.xml.transform.stream.StreamResult;public class SetLogUtils {private Logger log = Logger.getLogger(SetLogUtils.class);private String xmlfilename = SetLogUtils.class.getResource("/log4j.xml").getPath();public void setloglevel(String logpackage, String loglevel) {log.info("修改日志级别");Document document = load(xmlfilename);Node root = document.getDocumentElement();// 获得第二级子节点的集合NodeList secondNodes = root.getChildNodes();if (secondNodes != null) {for (int i = 0; i < secondNodes.getLength(); i++) {// 循环获得第二级子节点Node secondNode = secondNodes.item(i);System.out.println(secondNode.getNodeName());log.info(secondNode.getNodeName());// 判断第二级节点是否为logger节点if (secondNode.getNodeType() == Node.ELEMENT_NODE&& secondNode.getNodeName().equals("logger")) {// 获得logger节点的name属性String name = secondNode.getAttributes().getNamedItem("name").getNodeValue();System.out.println(name);log.info(name);// 循环获得logger下面的第三级节点for (Node thirdNode = secondNode.getFirstChild(); thirdNode != null; thirdNode = thirdNode.getNextSibling()) {// 判断第三级节点是否为level节点if (thirdNode.getNodeType() == Node.ELEMENT_NODE&& thirdNode.getNodeName().equals("level")) {// 获得level节点的value属性String value = thirdNode.getAttributes().getNamedItem("value").getNodeValue();// 修改level节点的value属性if (logpackage.equals(name)) {thirdNode.getAttributes().getNamedItem("value").setNodeValue(loglevel);}}}}}}// 修改class路径下面的log4j.xml文件doc2XmlFile(document, xmlfilename);// 在xml配置文件中追加<!DOCTYPE log4j:configuration SYSTEM \"log4j.dtd\">appendMethodA(xmlfilename);// 在内存中改变日志级别。changeLogLever(logpackage, loglevel);//动态加载日志文件configure(xmlfilename);log.info("修改完成!!");}// 修改文件日志路径public void setlogpath(String logname, String logpath) {log.info("修改日志路径");Document document = load(xmlfilename);Node root = document.getDocumentElement();// 获得第二级子节点的集合NodeList secondNodes = root.getChildNodes();if (secondNodes != null) {for (int i = 0; i < secondNodes.getLength(); i++) {// 循环获得第二级子节点Node secondNode = secondNodes.item(i);System.out.println("appender节点：" + secondNode.getNodeName());log.info("appender节点：" + secondNode.getNodeName());// 判断第二级节点是否为logger节点if (secondNode.getNodeType() == Node.ELEMENT_NODE&& secondNode.getNodeName().equals("appender")) {// 获得appender节点的name属性String name = secondNode.getAttributes().getNamedItem("name").getNodeValue();// 循环获得logger下面的第三级节点for (Node thirdNode = secondNode.getFirstChild(); thirdNode != null; thirdNode = thirdNode.getNextSibling()) {// 判断第三级节点是否为level节点if (thirdNode.getNodeType() == Node.ELEMENT_NODE&& thirdNode.getNodeName().equals("param")) {String paramfilename = thirdNode.getAttributes().getNamedItem("name").getNodeValue();if (paramfilename.equals("File")) {// 获得param节点的value属性String value = thirdNode.getAttributes().getNamedItem("value").getNodeValue();log.info("日志路径:" + value);System.out.println("日志路径:" + value);// 修改param节点的value属性if (logname.equals(name)) {thirdNode.getAttributes().getNamedItem("value").setNodeValue(logpath+"/"+name+".log");}// thirdNode.getAttributes().getNamedItem("value").setNodeValue("rrrrrrrrrr");// String value3// =thirdNode.getAttributes().getNamedItem("value").getNodeValue();// System.out.println("修改日志路径:"+value3);}}}}}}// 修改class路径下面的log4j.xml文件doc2XmlFile(document, xmlfilename);appendMethodA(xmlfilename);// 修改项目相对路径下面的log4j.xml文件// doc2XmlFile(document,"resources/log4j.xml");// 修改内存的路径changeLogPath(logpath, logname);//动态加载日志文件configure(xmlfilename);log.info("日志路径修改完成");}private void changeLogPath(String path, String appenderName) {Logger logger = log.getLogger("com.shenfeinfo");FileAppender fileAppender = (FileAppender) logger.getAppender(appenderName);fileAppender.setFile(path + "/" + appenderName + ".log");System.out.println("PATH:" + path + "/" + appenderName + ".log");fileAppender.activateOptions();}// 修改文件日志文件大小public void setlogsize(String logname, String size) {log.info("修改日志大小");Document document = load(xmlfilename);Node root = document.getDocumentElement();// 获得第二级子节点的集合NodeList secondNodes = root.getChildNodes();if (secondNodes != null) {for (int i = 0; i < secondNodes.getLength(); i++) {// 循环获得第二级子节点Node secondNode = secondNodes.item(i);System.out.println("appender节点：" + secondNode.getNodeName());log.info("appender节点：" + secondNode.getNodeName());// 判断第二级节点是否为logger节点if (secondNode.getNodeType() == Node.ELEMENT_NODE&& secondNode.getNodeName().equals("appender")) {// 获得appender节点的name属性String name = secondNode.getAttributes().getNamedItem("name").getNodeValue();// 循环获得logger下面的第三级节点for (Node thirdNode = secondNode.getFirstChild(); thirdNode != null; thirdNode = thirdNode.getNextSibling()) {// 判断第三级节点是否为level节点if (thirdNode.getNodeType() == Node.ELEMENT_NODE&& thirdNode.getNodeName().equals("param")) {String paramfilsize = thirdNode.getAttributes().getNamedItem("name").getNodeValue();log.info("日志大小：" + paramfilsize);if (paramfilsize.equals("maxFileSize")) {// 获得param节点的value属性String value = thirdNode.getAttributes().getNamedItem("value").getNodeValue();System.out.println("日志路径:" + value);// 修改param节点的value属性if (logname.equals(name)) {thirdNode.getAttributes().getNamedItem("value").setNodeValue(size + "KB");}}}}}}}// 修改class路径下面的log4j.xml文件doc2XmlFile(document, xmlfilename);appendMethodA(xmlfilename);// 修改项目相对路径下面的log4j.xml文件// doc2XmlFile(document,"resources/log4j.xml");// appendMethodA("resources/log4j.xml");configure(xmlfilename);log.info("日志大小修改完成");}// 加载配置配置文件public Document load(String filename) {System.out.println(filename);Document document = null;try {DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = factory.newDocumentBuilder();document = builder.parse(new File(filename));document.normalize();} catch (Exception ex) {ex.printStackTrace();}return document;}// 将修改的document保存xml文件public void doc2XmlFile(Document document, String filename) {try {/** 将document中的内容写入文件中 */TransformerFactory tf = TransformerFactory.newInstance();Transformer transformer = tf.newTransformer();DOMSource source = new DOMSource(document);/** 编码 */transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");transformer.setOutputProperty(OutputKeys.INDENT, "yes");PrintWriter pw = new PrintWriter(new FileOutputStream(filename));StreamResult result = new StreamResult(pw);transformer.transform(source, result);} catch (TransformerException mye) {log.info("保存log4j.xml文件出错" + mye);mye.printStackTrace();} catch (IOException exp) {log.info("保存log4j.xml文件出错" + exp);exp.printStackTrace();}}// 在配置文件中追加<!DOCTYPE log4j:configuration SYSTEM \"log4j.dtd\">public void appendMethodA(String fileName) {try {String content = "<!DOCTYPE log4j:configuration SYSTEM \"log4j.dtd\">";// 打开一个随机访问文件流，按读写方式RandomAccessFile randomFile = new RandomAccessFile(fileName, "rw");// 文件长度，字节数String str = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>";// 将写文件指针移到文件尾。randomFile.seek(str.length());// randomFile.writeUTF(content+readFileByBytes(fileName));randomFile.writeBytes(content + readFileByBytes(fileName));randomFile.close();} catch (IOException e) {log.info("追加<!DOCTYPE log4j:configuration SYSTEM \"log4j.dtd\">错误"+ e);e.printStackTrace();}}/** * 读取出源xml文件中<!DOCTYPE log4j:configuration SYSTEM \"log4j.dtd\">后面的部分 * 用于上面追加的时候补全被覆盖的部分 *  * @param fileName * @return */public String readFileByBytes(String fileName) {String content = "";String Start = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>";String Ending = "</log4j:configuration>";InputStream in = null;try {System.out.println("以字节为单位读取文件内容，一次读多个字节：");// 一次读多个字节byte[] tempbytes = new byte[10000];int byteread = 0;in = new FileInputStream(fileName);// 读入多个字节到字节数组中，byteread为一次读入的字节数while ((byteread = in.read(tempbytes)) != -1) {System.out.write(tempbytes, 0, byteread);content += new String(tempbytes);}} catch (FileNotFoundException e) {log.info("读取log4j.xml文件出错" + e);e.printStackTrace();} catch (IOException e) {log.info("读取log4j.xml文件出错" + e);e.printStackTrace();} finally {try {if(in != null){in.close();}} catch (IOException e) {log.info("读取log4j.xml文件出错" + e);e.printStackTrace();}}content = content.substring(Start.length(), content.length());String[] ss = content.split(Ending);content = ss[0] + "</log4j:configuration>";return content;}// 改变不同包下面的不同的级别public void changeLogLever(String logpackage, String logLevelmap) {Logger.getLogger(logpackage).setLevel(getLevel(logLevelmap));}// 将字符串转换成日志级别public Level getLevel(String level) {level = level.toUpperCase();System.out.println(level);if (level.equals("FATAL")) {return Level.FATAL;} else if (level.equals("ERROR")) {return Level.ERROR;} else if (level.equals("WARN")) {return Level.WARN;} else if (level.equals("INFO")) {return Level.INFO;} else {return Level.DEBUG;}}public static void main(String[] args) {// new SetLogUtils().load("");// new SetLogUtils().setlogsize("1000");DOMConfigurator.configure("");}//动态加载日志文件public void configure(String filename){DOMConfigurator.configure(filename);}}