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public static boolean sql_inj(String str) 
{
String inj_str = "'|and|exec|insert|select|delete|update|count|*|%|chr|mid|master|truncate|char|declare|;|or|-|+|,";
String inj_stra[] = split(inj_str,"|");
for (int i=0 ; i < inj_stra.length ; i++ )
{
if (str.indexOf(inj_stra)>=0)
{
return true;
}
}
return false;
}

jsp中调用该函数检查是否包函非法字符
<%
if(request.getParameter("userID") != null)
userID = request.getParameter("userID").trim();

if (StringUtil.sql_inj(userID) || StringUtil.sql_inj(pwd)){
%>
<Script Language=javascript>alert('参数中包含非法字符！');history.back(-1);</Script>" ;
<%
}else{
……
}%>

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  <Connector
port="8080"               maxHttpHeaderSize="8192"
               maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
               enableLookups="false" redirectPort="8443" acceptCount="100"
               connectionTimeout="20000" disableUploadTimeout="true" URIEncoding="UTF-8"/>

    <Connector port="8009"
               enableLookups="false" redirectPort="8443" protocol="AJP/1.3" URIEncoding="UTF-8" />

<a href=tag.jsp?tag=<%=URLEncoder.encode(blog.getTags(),"UTF-8")%>><strong><font color=red><%=blog.getTags() %>
解码时直接用
java.net.URLDecoder.decode(request.getParameter("tag"));即可解决乱码问题！

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现在很多媒体公司都在将自己的音频视频以podcast的方式发布，目前以音频文件为主（mp3）。如：新英格兰杂志、自然、科学、美国国家广播电台等，会越来越多的。以后，随时会有海量的最新信息等你下载。

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javax.servlet.ServletException: Hibernate operation: Cannot open connection; uncategorized SQLException for SQL [???]; SQL state [null]; error code [0]; Connections could not be acquired from the underlying database!; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

<!-- for properties files -->
 <bean id="propertyConfigurer"
  class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
  <property name="locations">
   <list>
    <value>classpath:c3p0.properties</value>
   </list>
  </property>
 </bean>

<!-- for dataSource -->
<bean id="dataSource"  class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
  <property name="driverClass" value="${jdbc.driver}" />
  <property name="jdbcUrl" value="${jdbc.url}" />

  <property name="properties">
   <props>
    <prop key="c3p0.minPoolSize">${hibernate.c3p0.minPoolSize}</prop>
    <prop key="hc3p0.maxPoolSize">${hibernate.c3p0.maxPoolSize}</prop>
    <prop key="hc3p0.timeout">${hibernate.c3p0.timeout}</prop>
    <prop key="c3p0.max_statement">${hibernate.c3p0.max_statement}</prop>
    <prop key="user">${jdbc.username}</prop>
    <prop key="password">${jdbc.password}</prop>
    <prop key="c3p0.testConnectionOnCheckout">true</prop>
   </props>
  </property>
 </bean>

	
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

		<property name="dataSource">
			<ref bean="dataSource" />
		</property>
		<property name="mappingResources">
            <list>
                <value>com/voff/hibernate/Blog.hbm.xml</value>
            </list>
        </property>
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">
					org.hibernate.dialect.MySQLDialect
				</prop>
				<prop key="hibernate.show_sql">
				true
				</prop>
				<prop key="hibernate.connection.provider_class">
                org.hibernate.connection.C3P0ConnectionProvider
               </prop>
			</props>
		</property>
	</bean>
	
	 <!-- transactionManager -->
	 <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory">
            <ref bean="sessionFactory"/>
        </property>
    </bean>
    
    <bean id="BlogDao" class="com.voff.dao.BlogDaoimpl">
        <property name="sessionFactory">
            <ref bean="sessionFactory"/>
        </property>
    </bean>
    
    	<!-- spring dao proxy -->
    <bean id="BlogDaoProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
        <property name="transactionManager">
            <ref bean="transactionManager"/>
        </property>
        <property name="proxyInterfaces">
            <list>
                <value>com.voff.dao.BlogDao</value>
            </list>
        </property>
        <property name="target">
            <ref bean="BlogDao"/>
        </property>
        <property name="transactionAttributes">
            <props>
                <prop key="insert">PROPAGATION_REQUIRED</prop>
                <prop key="save*">PROPAGATION_REQUIRED</prop>
                <prop key="update*">PROPAGATION_REQUIRED</prop>
                <prop key="find*">PROPAGATION_REQUIRED</prop>
                <prop key="*">PROPAGATION_REQUIRED,readOnly</prop>   
            </props>
        </property>
    
    </bean>
    
	</beans>

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost/spring?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=

hibernate.c3p0.minPoolSize=5
hibernate.c3p0.maxPoolSize=20
hibernate.c3p0.timeout=100
hibernate.c3p0.max_statement=50

package com.voff.dao;

import java.util.ArrayList;
import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.voff.hibernate.Blog;



public class BlogDaoimpl extends HibernateDaoSupport implements BlogDao{

	public void addblog(Blog blog) {
		getHibernateTemplate().save(blog);
		
		
	}

	public void delblog(int id) {

		Object blog=getHibernateTemplate().load(Blog.class,id);    
		 getHibernateTemplate().delete(blog); 

		
	}

	public void updateblog(Blog blog) {
		getHibernateTemplate().update(blog);

		
	}
	
	public Blog getblog(int id){
		return (Blog) getHibernateTemplate().get(Blog.class,id);
	}
	
	
   public int Totallimitblog(int caid,String bauthor){
	   String sql = "from Blog where cateid='"+caid+"' and bauthor ='"+bauthor+"'";
		  List total = getHibernateTemplate().find(sql);

		return total.size();
   }
	
	public ArrayList showblog(int firstRow,int maxRow,int caid,String bauthor){
		List   list=new   ArrayList();   

		  Session   session  =  getHibernateTemplate().getSessionFactory().openSession();   
		  Query   query   =session.createQuery("from Blog where cateid='"+caid+"' and bauthor ='"+bauthor+"' order by blogid desc");   
		  query.setFirstResult(firstRow);   
		  query.setMaxResults(maxRow);   
		  list=query.list();  
		  session.flush();
		  session.close();
		  return   (ArrayList) list;
	}




}

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LoadModule jk_module modules/mod_jk.so

<IfModule mod_jk.c>
JkWorkersFile "/usr/local/apache/conf/workers.properties"
JkLogFile "logs/mod_jk.log"
JkLogLevel warn

#JkMount /jsp-examples worker1
#JkMount /jsp-examples/* worker1
# Map in the Ozibug webapp
JkMount /yahoo/* worker1

</IfModule>

<IfModule mod_limitipconn.c>
 <Location /yahoo>
    MaxConnPerIP 1000
 </Location>
</IfModule>

# Define 1 real worker using ajp13
worker.list=worker1
# Set properties for worker1 (ajp13)
worker.worker1.type=ajp13
worker.worker1.host=localhost
worker.worker1.port=8009
worker.worker1.lbfactor=50
worker.worker1.cachesize=10
worker.worker1.cache_timeout=600
worker.worker1.socket_keepalive=1
worker.worker1.socket_timeout=300

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

<session-factory>
	<property name="connection.username">root</property>
	<property name="connection.password"></property>
	<property name="connection.url">
		jdbc:mysql://localhost/backup?useUnicode=true&characterEncoding=UTF-8
	</property>
	<property name="dialect">
		org.hibernate.dialect.MySQLDialect
	</property>
	<property name="myeclipse.connection.profile">Mysql</property>
	<property name="connection.driver_class">
		com.mysql.jdbc.Driver
	</property>

	<!-- Echo all executed SQL to stdout -->
	<property name="show_sql">true</property>
	<property name="hibernate.jdbc.fetch_size">50</property>
	<property name="hibernate.jdbc.batch_size">25</property>

   <property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
  <property name="hibernate.c3p0.max_size">20</property>
  <property name="hibernate.c3p0.min_size">5</property>
  <property name="hibernate.c3p0.timeout">15000</property>
  <property name="hibernate.c3p0.max_statements">100</property>
  <property name="hibernate.c3p0.idle_test_period">120</property>
  <property name="hibernate.c3p0.acquire_increment">2</property>
  <property name="hibernate.c3p0.validate">true</property>

	<!-- mapping resource="com/voff/News.hbm.xml" /-->
	<mapping resource="com/voff/News.hbm.xml" />
	<mapping resource="com/voff/User.hbm.xml" />
	<mapping resource="com/voff/Comment.hbm.xml" />
	<mapping resource="com/voff/Category.hbm.xml" />
	<mapping resource="com/voff/Pk.hbm.xml" />
	<mapping resource="com/voff/Qa.hbm.xml" />
	<mapping resource="com/voff/Logs.hbm.xml" />
</session-factory>

</hibernate-configuration>

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 <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
 
    <class name="com.voff.News" table="news">
        <id name="nid">
            <generator class="increment"/> 
        </id>
        <property name="ncontent" /> 
        <property name="hits" />
        <property name="nauthor"/> 
        <property name="ntitle"/> 
        <property name="time"/>
        <property name="iftop"/> 
        <property name="ifshow"/> 
        <property name="cateid"/>
        <property name="lastupdate"/>
        
    </class>

</hibernate-mapping> 

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

<session-factory>
	<property name="connection.username">root</property>
	<property name="connection.password"></property>
	<property name="connection.url">
		jdbc:mysql://localhost/news?useUnicode=true&characterEncoding=UTF-8
	</property>
	<property name="dialect">
		org.hibernate.dialect.MySQLDialect
	</property>
	<property name="myeclipse.connection.profile">Mysql</property>
	<property name="connection.driver_class">
		com.mysql.jdbc.Driver
	</property>

	<!-- Echo all executed SQL to stdout -->
	<property name="show_sql">true</property>


	<property name="c3p0.min_size">5</property> 
    <property name="c3p0.max_size">30</property> 
    <property name="c3p0.time_out">1800</property> 
    <property name="c3p0.max_statement">50</property> 
	<property name="connection.pool_size">1</property>

	
	<mapping resource="com/voff/News.hbm.xml" />
	<mapping resource="com/voff/User.hbm.xml" />
	<mapping resource="com/voff/Comment.hbm.xml" />
	<mapping resource="com/voff/Category.hbm.xml" />
	<mapping resource="com/voff/Pk.hbm.xml" />
	<mapping resource="com/voff/Qa.hbm.xml" />
	<mapping resource="com/voff/Logs.hbm.xml" />
</session-factory>

</hibernate-configuration>

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<%@ page language="java" contentType="text/html;charset=GB2312"%> 
<%@ page import="org.hibernate.*,org.hibernate.cfg.*,ch03.hibernate.HibernateUtil,ch03.hibernate.User"%>

  
   <%
          try{
         Session ssession;
            ssession = HibernateUtil.currentSession();
            Transaction tx= ssession.beginTransaction();
			for(int i=0;i<20;i++){
           	User user = new User();
			
			user.setUsername("Hibernate");
			user.setPassword("hello110");
			user.setEmail("chen@163.com");
            ssession.save(user);
            }
            tx.commit();
			out.println("ok");
 
            HibernateUtil.closeSession();
            }catch(HibernateException e){
            }
            


     
   %> 

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<Resource name="jdbc/MYDS" auth="Container" type="javax.sql.DataSource"/>
   <ResourceParams name="jdbc/chen">
      <parameter>
         <name>username</name>
         <value>root</value>
      </parameter>
      <parameter>
         <name>password</name>
         <value></value>
      </parameter>
      <parameter>
         <name>driverClassName</name>
         <value>com.mysql.jdbc.Driver</value>
      </parameter>
      <parameter>
         <name>url</name>
         <value>jdbc:mysql://localhost/voff</value>
      </parameter>
   </ResourceParams>
</Context>

<Resource
   name="jdbc/chen"
   auth="Container"
   type="javax.sql.DataSource"
   username="root"
   password=""
   driverClassName="com.mysql.jdbc.Driver"
   url="jdbc:mysql://localhost/voff"
/>

<%@ page language="java" contentType="text/html;charset=GB2312"%>
<%@ page import="java.sql.*,javax.sql.*,javax.naming.*"%>
<%
   Connection conn=null;
   String url="jdbc:mysql://localhost:3306/voff";
   String user="root";
   String password="";
   try{
       InitialContext ctx=new InitialContext();
       DataSource ds=(DataSource)ctx.lookup("java:comp/env/jdbc/chen");
       conn=ds.getConnection();
       if(conn!=null)
       {
        out.println("数据源jdbc/chen配置正确！");
       }
       }catch(Exception e)
       {
        out.println("数据库驱动加载出现错误！"+e.getMessage());
       }
%>

<%@page contentType="text/html;charset=gb2312"%>
<%@page import="java.sql.*"%>
<%@page import="javax.sql.DataSource"%>
<%@page import="javax.naming.*"%>
<html>
<body>
<%
try{
Context initCtx=new InitialContext();
DataSource db = (DataSource)initCtx.lookup("java:comp/env/jdbc/chen");
Connection conn = db.getConnection();
ResultSet rs=null;
Statement stmt = conn.createStatement();
String sql="select * from user limit 10";
rs = stmt.executeQuery(sql);
out.println("User-list"+"<br>");
while(rs.next()){
  out.print("id is"+rs.getString("id")+"<br>");
  out.print("name is"+rs.getString("username")+"<br>");
}
rs.close();
stmt.close();
conn.close();
}
catch(Exception e){
out.print(e);
}
%>
</body>
</html>

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Tomcat是一个带有jsp环境的servlet容器.servlet容器是一个根据用户的行为可以管理和激活servlet的运行时的shell. 
　　
　　粗略地可以将servlet容器分为如下几类: 
　　
　　独立的servlet容器 
　　
　　内置有web服务器的一部分.指当使用基于Java的web服务器的情形,例如servlet容器是JavaWebServer的一个部分. 独立的servlet容器是Tomcat的默认模式. 
　　
　　大多数的web服务器并非基于Java,因此,我们可以得出如下两种容器的模式. 
　　
　　进程内的servlet容器 
　　
　　servlet容器作为web服务器的插件和Java容器的实现.Web服务器插件在内部地址空间打开一个JVM(java virtual machine)使Java容器得以在内部运行.如有某个需要调用servlet的请求,,插件将取得对此请求的控制并将他传递(使用JNI)给Java容器.进程内容器对于多线程,单进程的服务器非常合适并且提供很好的运行速度,但伸缩性有所不足. 
　　
　　进程外的servlet容器 
　　
　　servlet容器运行于web服务器之外的地址空间且作为web服务器的插件和Java容器的实现的结合.web服务器插件和Java容器 JVM使用IPC机制(通常是TCP/IP)进行通讯.当一个调用servlet的请求到达时,插件将取得对此请求的控制并将其传递(使用IPC等)给Java容器,进程外容器的反应时间或进程外容器引擎不如进程内容器,但进程外容器引擎在许多其他可比的范围内更好(伸缩性,稳定性等). 
　　
　　Tomcat既可作为独立的容器(主要是用于开发与调试)又可作为对现有服务器的附加(当前支持Apache,IIS和Netscape服务器).即任何时候配置Tomcat你都必须决定如何应用他,如选择第二或第三种模式,你还需要安装一个web服务器接口

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package chen.hibernate;

import chen.hibernate.User;
//import org.hibernate.*;
import org.hibernate.cfg.*;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.HibernateException;
import org.hibernate.cfg.Configuration;

public class   Test {
	public static void main(String[] args) {
		try
		{
			SessionFactory sf = new Configuration().configure().bulidSessionFactory();
			
			Session session  = sf.openSession();

			Transaction tx = session.beginTransaction();

			
            for (int i=0;i<3000;i++)
            {
		    User user = new User();
			user.setUsername("hibernate");
			user.setPassword("123");
			session.save(user);
                        }
			tx.commit();
			session.close();
			
			System.out.println("ok");
			
		}
		catch (HibernateException e)
		{
			e.printStackTrace();
		}

 }
}

 方法 bulidSessionFactory()
位置： 类 org.hibernate.cfg.Configuration
                        SessionFactory sf =
dSessionFactory();

Test.java:19: 找不到符号
符号： 类 Transation
位置： 类 chen.hibernate.Test
                        Transation tx = sess
                        ^
Test.java:34: 找不到符号
符号： 类 HibernateException
位置： 类 chen.hibernate.Test
                catch (HibernateException e)

Test.java:16: 找不到符号
符号： 方法bulidSessionFactory()
位置：  类 org.hibernate.cfg.Configuration
                        SessionFactory sf = new Configuration().confi
                                            ^
gure().bulidSessionFactory();

  Configuration config = new Configuration().configure();      
		  SessionFactory sessionFactory = config.buildSessionFactory();  
		  Session session = sessionFactory.openSession(); 
			Transaction tx = session.beginTransaction();

log4j:WARN No appenders could be find for logger
log4j:WARN please initialize the log4j system properly

Exception in thread "main" java.lang.NoClassDefFoundError: net/sf/ehcache/CacheException
  at java.lang.Class.getDeclaredConstructors0(Native Method)

多看文档，多思考，自己解决问题。
多写代码，多锻炼，程序不费力气。

NoClassDefFoundError: org/objectweb/asm/Type 

Exception in thread "main" java.lang.NoClassDefFoundError: javax/transaction/Synchronization

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