根据文件模板用ant设值
最近有个需求，要求用java生成一段js的变量，因为变量是动态的，项目也是global的。因此想到了用ant.刚写完，现在乘热打铁。
我用的是filter去截取用户请求路径。主要业务是在doFilter里面，只是个demo哈。
package com.test;import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import org.apache.tools.ant.DefaultLogger;import org.apache.tools.ant.Project;import org.apache.tools.ant.ProjectHelper;public class TestFilter implements Filter {public void destroy() {// TODO Auto-generated method stub}public void doFilter(ServletRequest arg0, ServletResponse arg1,FilterChain arg2) throws IOException, ServletException {System.out.println("--------------");HttpServletRequest req = (HttpServletRequest) arg0;String uri = req.getRequestURI();System.out.println(uri);//要生成的jsp，把var 变量就放在这里了，其他JSP直接include这个jsp就行String reportFileName = "lala.jsp";System.out.println("reportFileName == " + reportFileName);//ant 模板String tempPathAnt = "jsVarable.xml";//build的路径String buildPath = "D:\\study\\myeclipse6.0\\test\\src\\com\\test\"+ tempPathAnt;//要生成的jsp的路径String destPath = "D:\\study\\myeclipse6.0\\test\\WebRoot\"+ reportFileName;System.out.println("destPath " + destPath);Map map = new HashMap();// set content valueString content = "<script>var test=">"+uri+"<"</script>";//设值，以便ant能得到map.put("destPath", destPath);map.put("content", content);build(buildPath, map, true);try {//因为是文件更新，所以用点时间去等他更新， 必须修改Thread.sleep(3000);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}arg2.doFilter(arg0, arg1);}public void init(FilterConfig arg0) throws ServletException {// TODO Auto-generated method stub}public static boolean build(String buildFile, Map propertyMap,boolean isDebug) {File file = new File(buildFile);Project project = new Project();ProjectHelper helper = ProjectHelper.getProjectHelper();if (isDebug) {DefaultLogger consoleLogger = new DefaultLogger();consoleLogger.setErrorPrintStream(System.err);consoleLogger.setOutputPrintStream(System.out);consoleLogger.setMessageOutputLevel(Project.MSG_ERR);project.addBuildListener(consoleLogger);}project.fireBuildStarted();project.init();//遍历传来的mapIterator iterator = propertyMap.keySet().iterator();while (iterator.hasNext()) {String key = (String) iterator.next();Object value = propertyMap.get(key);if (value instanceof String) {project.setProperty(key, (String) value);}}helper.parse(project, file);project.executeTarget(project.getDefaultTarget());project.fireBuildFinished(null);return true;}}<?xml version="1.0" encoding="UTF-8"?><project name="test" default="test" basedir="."><!-- 1、过滤参数 --><target name="setParam"><!-- 内容 --><filter token="content" value="${content}" /></target><!-- 2、删除原有文件 --><target name="removeFile" depends="setParam"><delete file="${destPath}" /></target><!-- 3、创建文件 --><target name="test" depends="setParam,removeFile"><copyfile dest="${destPath}" src="jsTemplate.jsp" filtering="true" forceoverwrite="true" /><echo message="copyfile ${destPath} success" /> </target></project>@content@