本文实例为大家分享了java常用工具类的具体代码，供大家参考，具体内容如下

package com.jarvis.base.util;import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.io.StringReader;import java.io.StringWriter;import java.net.URL;import java.util.Properties;import javax.xml.transform.OutputKeys;import javax.xml.transform.Result;import javax.xml.transform.Source;import javax.xml.transform.Transformer;import javax.xml.transform.TransformerFactory;import javax.xml.transform.stream.StreamResult;import javax.xml.transform.stream.StreamSource;import org.dom4j.Document;import org.dom4j.Element;import org.dom4j.io.OutputFormat;import org.dom4j.io.SAXReader;import org.dom4j.io.XMLWriter;/** * * * @Title: XMLHelper.java * @Package com.jarvis.base.util * @Description:XML工具类 * @version V1.0 */public final class XMLHelper { /** * 把XML按照给定的XSL进行转换，返回转换后的值 * * @param xml * xml * @param xsl * xsl * @return * @throws Exception */ public static String xml2xsl(String xml, URL xsl) throws Exception { if (StringHelper.isEmpty(xml)) { throw new Exception("xml string is empty"); } if (xsl == null) { throw new Exception("xsl string is empty"); } StringWriter writer = new StringWriter(); Source xmlSource = null; Source xslSource = null; Result result = null; try { xmlSource = new StreamSource(new StringReader(xml)); xslSource = new StreamSource(xsl.openStream()); result = new StreamResult(writer); TransformerFactory transFact = TransformerFactory.newInstance(); Transformer trans = transFact.newTransformer(xslSource); trans.transform(xmlSource, result); return writer.toString(); } catch (Exception ex) { throw new Exception(ex); } finally { writer.close(); writer = null; xmlSource = null; xslSource = null; result = null; } } /** * 把XML按用户定义好的XSL样式进行输出 * * @param xmlFilePath * XML文档 * @param xsl * XSL样式 * @return 样式化后的字段串 */ public static String xml2xsl(String xmlFilePath, String xsl) throws Exception { if (StringHelper.isEmpty(xmlFilePath)) { throw new Exception("xml string is empty"); } if (StringHelper.isEmpty(xsl)) { throw new Exception("xsl string is empty"); } StringWriter writer = new StringWriter(); Source xmlSource = new StreamSource(new File(xmlFilePath)); Source xslSource = new StreamSource(new File(xsl)); Result result = new StreamResult(writer); try { TransformerFactory transFact = TransformerFactory.newInstance(); Transformer trans = transFact.newTransformer(xslSource); Properties properties = trans.getOutputProperties(); properties.setProperty(OutputKeys.ENCODING, "UTF-8"); properties.put(OutputKeys.METHOD, "html"); trans.setOutputProperties(properties); trans.transform(xmlSource, result); return writer.toString(); } finally { writer.close(); writer = null; xmlSource = null; xslSource = null; result = null; } } /** * 读取XML文档，返回Document对象.<br> * * @param xmlFile * XML文件路径 * @return Document 对象 */ public static Document getDocument(String xmlFile) throws Exception { if (StringHelper.isEmpty(xmlFile)) { return null; } File file = null; SAXReader saxReader = new SAXReader(); file = new File(xmlFile); return saxReader.read(file); } /** * 读取XML文档，返回Document对象.<br> * * @param xmlFile * file对象 * @return Document 对象 */ public static Document getDocument(File xmlFile) { try { SAXReader saxReader = new SAXReader(); return saxReader.read(xmlFile); } catch (Exception ex) { ex.printStackTrace(); System.err.println("读取xml文件出错，返回null"); return null; } } /** * 读取XML字串，返回Document对象 * * @param xmlString * XML文件路径 * @return Document 对象 */ public static Document getDocumentFromString(String xmlString) { if (StringHelper.isEmpty(xmlString)) { return null; } try { SAXReader saxReader = new SAXReader(); return saxReader.read(new StringReader(xmlString)); } catch (Exception ex) { ex.printStackTrace(); System.err.println("读取xml文件出错，返回null"); return null; } } /** * 描述：把xml输出成为html 作者： 时间：Oct 29, 2008 4:57:56 PM * * @param xmlDoc * xmlDoc * @param xslFile * xslFile * @param encoding * 编码 * @return * @throws Exception */ public static String xml2html(String xmlDoc, String xslFile, String encoding) throws Exception { if (StringHelper.isEmpty(xmlDoc)) { throw new Exception("xml string is empty"); } if (StringHelper.isEmpty(xslFile)) { throw new Exception("xslt file is empty"); } StringWriter writer = new StringWriter(); Source xmlSource = null; Source xslSource = null; Result result = null; String html = null; try { xmlSource = new StreamSource(new StringReader(xmlDoc)); xslSource = new StreamSource(new File(xslFile)); result = new StreamResult(writer); TransformerFactory transFact = TransformerFactory.newInstance(); Transformer trans = transFact.newTransformer(xslSource); Properties properties = trans.getOutputProperties(); properties.put(OutputKeys.METHOD, "html"); properties.setProperty(OutputKeys.ENCODING, encoding); trans.setOutputProperties(properties); trans.transform(xmlSource, result); html = writer.toString(); writer.close(); return html; } catch (Exception ex) { throw new Exception(ex); } finally { writer = null; xmlSource = null; xslSource = null; result = null; } } /** * 描述：把xml输出成为html * * @param xmlFile * xmlFile * @param xslFile * xslFile * @param encoding * 编码 * @return * @throws Exception */ public static String xmlFile2html(String xmlFile, String xslFile, String encoding) throws Exception { if (StringHelper.isEmpty(xmlFile)) { throw new Exception("xml string is empty"); } if (StringHelper.isEmpty(xslFile)) { throw new Exception("xslt file is empty"); } StringWriter writer = new StringWriter(); Source xmlSource = null; Source xslSource = null; Result result = null; String html = null; try { xmlSource = new StreamSource(new File(xmlFile)); xslSource = new StreamSource(new File(xslFile)); result = new StreamResult(writer); TransformerFactory transFact = TransformerFactory.newInstance(); Transformer trans = transFact.newTransformer(xslSource); Properties properties = trans.getOutputProperties(); properties.put(OutputKeys.METHOD, "html"); properties.setProperty(OutputKeys.ENCODING, encoding); trans.setOutputProperties(properties); trans.transform(xmlSource, result); html = writer.toString(); writer.close(); return html; } catch (Exception ex) { throw new Exception(ex); } finally { writer = null; xmlSource = null; xslSource = null; result = null; } } /** * 描述： * * @param name * 名 * @param element * 元素 * @return */ public static String getString(String name, Element element) { return (element.valueOf(name) == null) ? "" : element.valueOf(name); } /** * 将一个XML文档保存至文件中. * * @param doc * 要保存的XML文档对象. * @param filePath * 要保存到的文档路径. * @param format * 要保存的输出格式 * @return true代表保存成功，否则代表不成功. */ public static boolean savaToFile(Document doc, String filePathName, OutputFormat format) { XMLWriter writer; try { String filePath = FileHelper.getFullPath(filePathName); // 若目录不存在，则建立目录 if (!FileHelper.exists(filePath)) { if (!FileHelper.createDirectory(filePath)) { return false; } } writer = new XMLWriter(new FileWriter(new File(filePathName)), format); writer.write(doc); writer.close(); return true; } catch (IOException ex) { ex.printStackTrace(); System.err.println("写文件出错"); } return false; } /** * 将一个XML文档保存至文件中. * * @param filePath * 要保存到的文档路径. * @param doc * 要保存的XML文档对象. * @return true代表保存成功，否则代表不成功. */ public static boolean writeToXml(String filePathName, Document doc) { OutputFormat format = OutputFormat.createCompactFormat(); format.setEncoding("UTF-8"); return savaToFile(doc, filePathName, format); }}

数据验证工具类

package com.jarvis.base.util;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.regex.Matcher;import java.util.regex.Pattern;/** * 说明: 常用的数据验证工具类。 * */public class ValidateUtil { public static final Pattern CODE_PATTERN = Pattern.compile("^0\\d{2,4}$"); public static final Pattern POSTCODE_PATTERN = Pattern.compile("^\\d{6}$"); public static final Pattern BANK_CARD_PATTERN = Pattern.compile("^\\d{16,30}$"); /** * 匹配图象 * * * 格式: /相对路径/文件名.后缀 (后缀为gif,dmp,png) * * 匹配 : /forum/head_icon/admini2005111_ff.gif 或 admini2005111.dmp * * * 不匹配: c:/admins4512.gif * */ public static final String ICON_REGEXP = "^(/{0,1}//w){1,}//.(gif|dmp|png|jpg)$|^//w{1,}//.(gif|dmp|png|jpg)$"; /** * 匹配email地址 * * * 格式: XXX@XXX.XXX.XX * * 匹配 : foo@bar.com 或 foobar@foobar.com.au * * 不匹配: foo@bar 或 $$$@bar.com * */ public static final String EMAIL_REGEXP = "(?://w[-._//w]*//w@//w[-._//w]*//w//.//w{2,3}$)"; /** * 匹配并提取url * * * 格式: XXXX://XXX.XXX.XXX.XX/XXX.XXX?XXX=XXX * * 匹配 : http://pile(regexp); Matcher matcher = pattern.matcher(str); return matcher.matches(); } }

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