JAVA处理的HTML的工具类.docx

JAVA处理的HTML的工具类，可以生成静态HTML页面，将HTML的内容转成纯文本。可以用于一些爬虫功能或者一些特殊处理的地方，代码有比较清晰的注释，所以也可以用于I/O流和HTML标签相关正则表达式的学习。package example.utils.html;import java.io.ByteArrayOutputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.util.regex.Pattern;import javax.servlet.RequestDispatcher;import javax.servlet.ServletContext;import javax.servlet.ServletException;import javax.servlet.ServletOutputStream;import javax.servlet.WriteListener;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpServletResponseWrapper;import org.apache.log4j.Logger;/* * HTML页面工具类 * * author Javier.Yao * */public class HtmlUtils private static Logger logger = Logger.getLogger(HtmlUtils.class);/* * 生成静态HTML页面的方法 * * param request * 请求对象 * param response * 响应对象 * param servletContext * Servlet上下文 * param fileName * 文件名称 * param fileFullPath * 文件完整路径 * param jspPath * 需要生成静态文件的JSP路径(相对即可) * throws IOException * throws ServletException */public void createStaticHTMLPage(HttpServletRequest request, HttpServletResponse response, ServletContext servletContext, String fileName, String fileFullPath, String jspPath)throws ServletException, IOException response.setContentType(text/html;charset=UTF-8);/ 设置HTML结果流编码(即HTML文件编码)RequestDispatcher rd = servletContext.getRequestDispatcher(jspPath);/ 得到JSP资源final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();/ 用于从ServletOutputStream中接收资源final ServletOutputStream servletOuputStream = new ServletOutputStream() / 用于从HttpServletResponse中接收资源Overridepublic void write(int b) throws IOException byteArrayOutputStream.write(b);public void write(byte b, int off, int len) byteArrayOutputStream.write(b, off, len);Overridepublic void setWriteListener(WriteListener listener) Overridepublic boolean isReady() return false; final PrintWriter printWriter = new PrintWriter(new OutputStreamWriter(byteArrayOutputStream);/ 把转换字节流转换成字符流HttpServletResponse httpServletResponse = new HttpServletResponseWrapper(response) / 用于从response获取结果流资源(重写了两个方法)public ServletOutputStream getOutputStream() return servletOuputStream;public PrintWriter getWriter() return printWriter;rd.include(request, httpServletResponse);/ 发送结果流printWriter.flush();/ 刷新缓冲区，把缓冲区的数据输出FileOutputStream fileOutputStream = new FileOutputStream(fileFullPath);byteArrayOutputStream.writeTo(fileOutputStream);/ 把byteArrayOuputStream中的资源全部写入到fileOuputStream中fileOutputStream.close();/ 关闭输出流，并释放相关资源response.sendRedirect(fileName);/ 发送指定文件流到客户端/* * 将HTML的内容转成纯文本 * * param inputString 带html标签的文本内容 * return 返回纯文本 */public static String Html2Text(String inputString) String htmlStr = inputString;String textStr = ;java.util.regex.Pattern p_script;java.util.regex.Matcher m_script;java.util.regex.Pattern p_style;java.util.regex.Matcher m_style;java.util.regex.Pattern p_html;java.util.regex.Matcher m_html;java.util.regex.Pattern p_html1;java.util.regex.Matcher m_html1;try / 定义script的正则表达式或*?sS*?String regEx_script = *?sS*?;/ 定义style的正则表达式或*?sS*?String regEx_style = *?sS*?;String regEx_html = +; / 定义HTML标签的正则表达式String regEx_html1 = +;p_script = Ppile(regEx_script, Pattern.CASE_INSENSITIVE);m_script = p_script.matcher(htmlStr);htmlStr = m_script.replaceAll(); / 过滤script标签p_style = Ppile(regEx_style, Pattern.CASE_INSENSITIVE);m_style = p_style.matcher(htmlStr);htmlStr = m_style.replaceAll(); / 过滤style标签p_html = Ppile(regEx_html, Pattern.CASE_INSENSITIVE);m_html = p_html.matcher(htmlStr);htmlStr = m_html.replaceAll(); / 过滤html标签p_html1 = Ppile(regEx_html1