wdfx100

jar:3
jcaptcha-2.0-alpha-1-SNAPSHOT.jar
jcaptcha-api-1.0.jar
jcaptcha-integration-simple-servlet-2.0-alpha-1-SNAPSHOT.jar

<form action="pay2" method="post">
      	<input type="hidden" name="token" value="${requestScope.request_token }"/>
    		输入支付金额：<input type="text" name="money"/><br>
    		请输入验证码：<input type="text" name="code" value=""/><br/>
    		<img alt="验证码" src="/jcaptcha.jpg" id="img">

wdfx100

//token.servlet→jsp→servlet→jsp结果页

public class TokenUtil {

  public static void createToken(HttpServletRequest request,HttpServletResponse response){
		
		UUID uuid = UUID.randomUUID();
		String token = uuid.toString();
		request.getSession().setAttribute("session_token",token);
		request.setAttribute("request_token", token);

wdfx100

//注意要点
//1.文件格式的设置
//2.文件名中中文的设置
//3.文件大小的设置
//4.设置一个相应的头 Servlet download file:搜  键：文件的描述   值：对应的文件
      response.setContentType("application/pdf");//设置文件格式
    
  	String fileName = "第一章.pdf";
  	File file = new File("I:/test/upload","第一章.pdf");//下载文件的路径及名称
  	response.setContentLength(new Long(file.length()).intValue());//进度条的操作，提示完成进度

wdfx100

//jar:ImageUtil.jar filters-2.0.235.jar
//jquert.jcrop.js  jcrop.css
      <img alt="" src="http://www.wdfx100.com/upload/${fileName }">
    	  <form action="jcrop" method="post">
  		  	<input type="hidden" name="fileName" value="${fileName}">
  		  	<input type="hidden" name="x1" id="x">
  		  	<input type="hidden" name="y1" id="y">
  		  	<input type="hidden" name="x2" id="x2">
  		  	<input type="hidden" name="y2" id="y2">
  		  	<input type="submit" value="剪裁"/>

wdfx100

//commons.apache.org 下的一个组件 upload
//jar:commons-fileupload-1.2.2.jar,依赖jar:commons-io-1.4.jar

<form action="fileUpload" method="post" enctype="multipart/form-data">
      文件描述：<input type="text" name="filedesc"><br/>
    	<input type="file" name="myfile"><br/>
    	<input type="submit" value="提交"/>
</form>
    
if(ServletFileUpload.isMultipartContent(request)){//获取请求的方式改变

wdfx100

//jar:commons-email-1.2
//1.5的javaee.jar下的mail文件删除，添加1.4的mail.jar


//1、commons-email发送普通文本邮件
public static void sendSimpleEmail(String toEmailAddress,String subject,String msg){
  	Email email = new SimpleEmail();
		email.setHostName("smtp.163.com");//发信件的邮件服务器
		email.setAuthentication("wdfx100", "**********");//设置身份验证:用户名和密码
		email.setCharset("UTF-8");

wdfx100

//jar:commons-dbcp-1.4 
//依赖的jar:commons-pool-1.5.6
//第一种//
private  static  BasicDataSource bd=null;
  static{
		bd = new BasicDataSource();
		bd.setDriverClassName(DIRVER);
		bd.setUrl(URL);
		bd.setUsername(NAME);
		bd.setPassword(PASSWORD);

wdfx100

public class DBhelp<T>{

  
	final String DRIVER="com.mysql.jdbc.Driver";
	final String URL="jdbc:mysql://127.0.0.1:3306/bookSystem";
	final String USERNAME="root";
	final String PASSWORD="123";
	
	/**
	 * 获取数据库连接对象

wdfx100

var eventUtil={
  			addHandler:function(element,type,handler){
					if(element.addEventListener){
						element.addEventListener(type,handler,false);
					}else if(element.attachEvent){
						element.attachEvent("on"+type,handler);
					}else{
					
						element["on"+type]=handler;
					

wdfx100

一、三种设置虚拟目录的方式
Tomcat设置 /conf/server.xml 

• 修改端口号 

<Connector port="8080" protocol="HTTP/1.1" 

         connectionTimeout="20000" 

         redirectPort="8443" />