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Tomcat7 新的数据库连接池Tomcat jdbc pool介绍和配置

2017-02-22 14:22 801 查看

1、Tomcat 中直接使用的方法：全局的连接池

在conf/server.xml下的<GlobalNamingResources>节点里配置resource，例如：

[xml] view plain copy <Resource name="jdbc/ens"
      auth="Container"
      type="javax.sql.DataSource"
      factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
      testWhileIdle="true"
      testOnBorrow="true"
      testOnReturn="false"
      validationInterval="30000"
      timeBetweenEvictionRunsMillis="30000"
      maxActive="100"
      minIdle="10"
      maxWait="10000"
      initialSize="10"
      removeAbandonedTimeout="60"
      removeAbandoned="true"
      logAbandoned="true"
      minEvictableIdleTimeMillis="30000"
      jmxEnabled="true"
      jdbcInterceptors=
"org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer"
      username="root"
      password="123"
      driverClassName="com.mysql.jdbc.Driver"
      url="jdbc:mysql://localhost:3306/ens"/>

2、

然后，在context.xml文件的<Context></Context>节点中添加如下配置：[xml] view plain copy <ResourceLink global="jdbc/ens" name="jdbc/ens" type="javax.sql.DataSource"/>

3、用JSP测试一下：

<%@ page language="java" contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

<%@ page import="java.io.*,java.util.*,java.sql.*"%>

<%@ page import="javax.servlet.http.*,javax.servlet.*" %>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql"%>

<%@page import="java.sql.Connection"%>

<%@page import="javax.naming.Context"%>

<%@page import="javax.naming.InitialContext"%>

<%@page import="javax.sql.DataSource"%>

<%@page import="java.sql.Statement"%>

<%@page import="java.sql.ResultSet"%>

<html>
<head>
<title> select 操作</title>
</head>
<body>

<sql:setDataSource var="snapshot" driver="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/test"
user="root" password="Dap1234$"/>

<sql:update dataSource="${snapshot}" var="result">
INSERT INTO t_test (name,year) VALUES ('菜鸟教程移动站', 2017);
</sql:update>
<sql:query dataSource="${snapshot}" var="result">
SELECT * from t_test;
</sql:query>
<c:forEach var="row" items="${result.rows}">
${row.id}-->${row.name}-->${row.year}--><br>
</c:forEach>
<p>
Haha
</p>

<table border='1'>
<tr>
<td>id</td>
<td>名称</td>
<td>年份</td>
</tr>
<%
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
String url ="jdbc:mysql://localhost/test?user=root&password=Dap1234$&useUnicode=true&characterEncoding=utf-8";
//myDB为数据库名
Connection conn= DriverManager.getConnection(url);
out.println(conn);
Statement ps = conn.createStatement();
ResultSet rs = ps.executeQuery("select * from t_test");
while(rs.next()){
String id = rs.getString("id");
String name = rs.getString("name");
String year = rs.getString("year");
%>
<tr>
<td><%=id%></td>
<td><%=name%></td>
<td><%=year%></td>
</tr>
<%
}
/*
import java.sql.*;
//Class.forName("org.gjt.mm.mysql.Driver").newInstance();
Class.forName("com.mysql.jdbc.Driver");
//String url ="jdbc:mysql://localhost/test?user=root$&password=Dap1234$&useUnicode=true&characterEncoding=utf-8";
String url ="jdbc:mysql://localhost:3306/test"; </pre><pre name="code" class="java">//myDB为数据库名
Connection conn= DriverManager.getConnection(url,"root","root");
Statement stmtNew=conn.createStatement();
*/
%>

</table>
<p>
--------------------
</p>
<%
out.println("god");
%>

<%

//连接池的获取

Connection conn1 = null;

DataSource ds = null;

ResultSet rs1 =null;

Statement stmt = null;

Context initCtx = new InitialContext();

ds =(DataSource)initCtx.lookup("java:comp/env/jdbc/test");

if(ds!=null){

out.println("已经获得DataSource!");

out.println("<br>");

conn1 = ds.getConnection();

try{

stmt = conn1.createStatement();

String sql ="select * from t_test";

rs1 = stmt.executeQuery(sql);

out.println("以下是从数据库中读取出来的数据:<br>");

while(rs1.next()){

out.println("<br>");

out.println(rs1.getString("name"));

}

}catch(Exception ex){

ex.printStackTrace();
out.println("有异常了！");

}finally{

conn1.close();

rs1.close();

stmt.close();

}

}

%>
</body>

</html>

参考方法五
http://blog.csdn.net/jiangbingbo123/article/details/51398011
方法七为单个web项目配置数据池

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