tomcat7.0.42设置mysql数据库连接池

server.xml

<Resource name="jdbc/test" 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="false" 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/test"/>
 
<Host appBase="webapps" autoDeploy="true" name="localhost" unpackWARs="true">
<Context docBase="blog3" path="/blog3" reloadable="true" source="org.eclipse.jst.jee.server:blog3"/>
</Host>

context.xml

<ResourceLink global="jdbc/test" name="jdbc/test" type="javax.sql.DataSource" />

Java代码：

public class DBconn {
    private static String datasoucename = "java:comp/env/jdbc/test";
    Context context = null;
    DataSource ds = null;
    Connection conn = null;
 
    public Connection getconn() {
        return initConnection();
    }
 
    public DataSource getDataSource() {
        try {
            context = new InitialContext();
        } catch (NamingException e) {
            System.err.println("连接池上下文不存在! " + e.getMessage());
        }
        try {
            ds = (DataSource) context.lookup(datasoucename);
        } catch (NamingException e) {
            System.err.println("数据源没发现! " + e.getMessage());
        }
        return ds;
    }
 
    private Connection initConnection() {
        try {
            context = new InitialContext();
        } catch (NamingException e) {
            System.err.println("连接池上下文不存在! " + e.getMessage());
        }
        try {
            ds = (DataSource) context.lookup(datasoucename);
        } catch (NamingException e) {
            System.err.println("数据源没发现! " + e.getMessage());
        }
        try {
            conn = ds.getConnection();
        } catch (SQLException e) {
            System.err.println("获取连接失败! " + e.getMessage());
        }
        return conn;
    }
 
    public void freeConnection() {
        try {
            conn.close();
        } catch (Exception e) {
            System.err.println("释放连接出错! ");
            e.printStackTrace();
        }
    }
 
}