ʹÓÃservletºÍJava Bean·ÃÎÊMySQL

»·¾³: JDK 5.0 + Tomcat 5.5.4
JDK°²×°Â·¾¶: D:\Java\jdk1.5.0_01
Tomcat°²×°Â·¾¶:D:\Tomcat 5.5
ÉèÖû·¾³±äÁ¿(¿ØÖÆÃæ°å->ϵͳ->¸ß¼¶):
java_home=D:\Java\jdk1.5.0_01
path=%JAVA_HOME%\bin
classpath=.;D:\Java\jdk1.5.0_01\lib\dt.jar;D:\Java\jdk1.5.0_01\lib\tools.jar;D:\Tomcat 5.5\common\lib\servlet-api.jar;D:\Tomcat 5.5\common\lib\mysql-connector-java-3.1.6-bin.jar;
ÆäÖÐD:\Tomcat 5.5\common\lib\servlet-api.jarΪTomcatµÄservlet APIʵÏÖ,Ò»¶¨Òª¼ÓÉÏ,²»ÈçÎÞ·¨±àÒëservlet
D:\Tomcat 5.5\common\lib\mysql-connector-java-3.1.6-bin.jar;ÊÇMySQLµÄJDBCÇý¶¯,connect/J 3.1.6,¿Éµ½MySQL¹Ù·½ÍøÕ¾ÏÂÔØ
Tomcat5.5ÐéÄâĿ¼É趨:
D:\Tomcat 5.5\conf\Catalina\localhostÏÂмÓÒ»test.xml
ÄÚÈÝÈçÏÂ:
<Context path="/test" docBase="d:/www" reloadable="true" crossContext="true" debug="0" >
</Context>
d:\www·¾¶½«ÊÇÎÒÃDzâÊÔÍøÕ¾µÄ¸ùĿ¼,ͨ¹ýhttp://localhost:8080/test·ÃÎʸÃÐéÄâĿ¼
d:\wwwϽ¨ÓÐĿ¼WEB-INF,ÏÂÓÐweb.xmlÉèÖÃÎļþ(¿É²Î¿¼D:\Tomcat 5.5\webapps\ROOT\WEB-INF\web.xml),classesĿ¼ºÍlibĿ¼
//Á¬½ÓÊý¾Ý¿âµÄJava BeanÎļþÃûDBConn.java
package zhy.database;
import java.sql.*;
public class DBConn {
public DBConn() {
}
//declare variable
private Connection conn = null;
ResultSet rs = null;
private String server = "127.0.0.1";
private String port = "3306";
private String db = "test";
private String user = "root";
private String pass = "password";
private String drivername="com.mysql.jdbc.Driver";
private String URL="jdbc:mysql://"+server+":"+port+"/"+db+"?user="+user+"&password="+pass;
public Connection getConn(){//get database connection
try{
Class.forName(drivername).newInstance();
conn = DriverManager.getConnection(URL);
}
catch(Exception e){
e.printStackTrace();
}
return this.conn ;
}
public ResultSet executeSQL(String str) {
try{
Statement stmt = conn.createStatement();
rs = stmt.executeQuery(str);
}
catch(Exception e){
e.printStackTrace();
}
return this.rs;
}
}
±àÒëjavac welcome.java,½«±àÒëº