一、jsp连接Oracle8/8i/9i数据库(用thin模式)
testOracle.jsp如下:
<%@ page contentType="text/html;charset=gb2312"%> <%@
page import="java.sql.*"%> <% String result = ""; //
查询结果字符串
String sql
= "select * from
test"; // SQL
字符串
// 连接字符串,格式:
"jdbc:数据库驱动名称:连接模式:@数据库服务器ip:端口号:数据库SID" String url = "jdbc:oracle:thin:@localhost:1521:orcl"; String username = "scott"; //
用户名 String password = "tiger"; //密码
// 创建oracle数据库驱动实例 Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
//
获得与数据库的连接 Connection conn
= DriverManager.getConnection(url, username,
password); //
创建执行语句对象 Statement stmt
= conn.createStatement(); //
执行sql语句,返回结果集 ResultSet
rs = stmt.executeQuery(sql);
while ( rs.next()
) { result
+= "\n
第一个字段内容:" + rs.getString(1) + "<BR>"; }
rs.close(); //
关闭结果集 stmt.close(); //
关闭执行语句对象 conn.close(); // 关闭与数据库的连接 %>
<HTML> <BODY> <%=result%> </BODY> </HTML> |
二、jsp连接Sql
Server7.0/2000数据库testSqlServer.jsp如下
<%@ page contentType="text/html;charset=gb2312"%> <%@
page import="java.sql.*"%> <% String sql = "select
* from test";
// 连接字符串,格式:
"jdbc:公司名称:数据库驱动名称://数据库服务器ip:端口号;DatabaseName=数据库名称" String url = "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=pubs"; String username = "scott"; String password
= "tiger";
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
Connection conn = DriverManager.getConnection(url,
username, password); Statement stmt
= conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs =
stmt.executeQuery(sql);
%>
<HTML> <BODY>
<% while ( rs.next()
) { %> 第一个字段内容为:<%=rs.getStrisng(1)%><BR> <% }
rs.close(); stmt.close(); conn.close(); %>
</BODY> </HTML> |
三、jsp连接DB2数据库testDB2.jsp如下:
<%@ page contentType="text/html;charset=gb2312"%> <%@
page import="java.sql.*"%> <% String sql = "select
* from test";
// 连接字符串,格式:
"jdbc:数据库驱动名称://数据库服务器ip:端口号/数据库名称" String url = "jdbc:db2://localhost:5000/sample"; String username = "scott"; String password
= "tiger";
Class.forName("com.ibm.db2.jdbc.app.DB2Driver").newInstance();
Connection conn = DriverManager.getConnection(url,
username, password); Statement stmt
= conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs =
stmt.executeQuery(sql);
rs.close(); stmt.close(); conn.close(); %> |
四、jsp连接Informix数据库 testInformix.jsp如下:
<%@ page contentType="text/html;charset=gb2312"%> <%@
page import="java.sql.*"%> <% String sql = "select
* from test";
// 连接字符串,格式:
"jdbc:数据库驱动名称://数据库服务器ip:端口号/数据库名称:INFORMIXSERVER=服务器名;user=用户名;password=密码" String url = "jdbc:informix-sqli://123.45.67.89:1533/testDB:INFORMIXSERVER=myserver;user=testuser;password=testpassword";
Class.forName("com.informix.jdbc.IfxDriver").newInstance();
Connection conn = DriverManager.getConnection(url); Statement stmt =
conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs =
stmt.executeQuery(sql);
rs.close(); stmt.close(); conn.close(); %> |
五、jsp连接Sybase数据库
testSybase.jsp如下:
<%@ page contentType="text/html;charset=gb2312"%> <%@
page import="java.sql.*"%> <% String sql = "select
* from test";
// 连接字符串,格式:
"jdbc:公司名称:数据库驱动名称:数据库服务器ip:端口号/数据库名称" String url = "jdbc:sybase:Tds:localhost:5007/tsdata";
Properties prop = System.getProperties(); prop.put("user", "userid"); //
用户名 prop.put("password", "user_password"); // 密码
Class.forName("com.sybase.jdbc.SybDriver").newInstance();
Connection conn = DriverManager.getConnection(url,
prop); Statement stmt
= conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs =
stmt.executeQuery(sql);
rs.close(); stmt.close(); conn.close(); %> |
六、jsp连接MySQL数据库 testMySQL.jsp如下:
<%@ page contentType="text/html;charset=gb2312"%> <%@
page import="java.sql.*"%> <% String sql = "select
* from test";
// 连接字符串,格式:
"jdbc:数据库驱动名称://数据库服务器ip/数据库名称?user=用户名&password=密码&使用Unicode=布尔值&字符编码=编码" String url = "jdbc:mysql://localhost/softforum?user=soft&password=soft1234&useUnicode=true&characterEncoding=8859_1"; String username = "scott"; String password
= "tiger";
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
Connection conn = DriverManager.getConnection(url,
username, password); Statement stmt
= conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs =
stmt.executeQuery(sql);
rs.close(); stmt.close(); conn.close(); %> |
七、jsp连接PostgreSQL数据库testPostgreSQL.jsp如下:
<%@ page contentType="text/html;charset=gb2312"%> <%@
page import="java.sql.*"%> <% String sql = "select
* from test";
// 连接字符串,格式:
"jdbc:数据库驱动名称://数据库服务器ip/数据库名称" String url = "jdbc:postgresql://localhost/soft"; String username = "scott"; String password
= "tiger";
Class.forName(""org.postgresql.Driver").newInstance();
Connection conn = DriverManager.getConnection(url,
username, password); Statement stmt
= conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs =
stmt.executeQuery(sql);
rs.close(); stmt.close(); conn.close(); %> |
下面是简单的数据库操作Javabean的代码:
DbWrapper.java |
import java.sql.*;import java.util.*;publicclass DbWrapper
{// 定义连接池对象为静态变量,将一直存在,直到工作目录关闭。privatestatic DataSource ds =null; // 1.用连接池的方式获得连接// 如果不是做多数据库程序,推荐使用此方法// 相关内容:在tomcat管理界面配置连接池publicstatic Connection openConnection()throws Exception
{// 只需要初始化1次if( ds ==null){
Context initContext =newInitialContext();
Context envContext =(Context) initContext.lookup("java:/comp/env");
DataSource ds =(DataSource) envContext.lookup("jdbc/MyDataSource");}return ds.getConnection();}// 2.用jdbc驱动获得连接// 相关内容:JSP数据库连接大全publicstatic Connection openConnection(
String driver,
String url,
String username,
String password)throws Exception
{
Class.forName(driver).newInstance();return DriverManager.getConnection(url, username, password);}publicstaticvoidcloseConnection(Connection conn)throws Exception
{if( conn !=null){
conn.close();}} publicstaticintexecuteUpdate(String sql)throws Exception
{int count =0;
Connection conn =null;
Statement stmt =null;try{
conn =openConnection();
stmt = conn.createStatement();
count = stmt.executeUpdate(sql);}catch( Exception e ){throw e;}finally{closeConnection(conn);}return count;}publicstatic List executeQuery(String sql)throws Exception
{
List list =newArrayList();
Connection conn =null;
Statement stmt =null;
ResultSet rs =null;try{
conn =openConnection();
stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
ResultSetMetaData rsmd = rs.getMetaData();while( rs.next()){
Map map =newHashMap();for(int i =1; i <= rsmd.getColumnCount(); i++){
map.put(rsmd.getColumnName(i), rs.getObject(i));}
list.add(map);} }catch( Exception e ){
e.printStackTrace();}finally{if( rs !=null) rs.close();closeConnection(conn);}return list; }}
|
// 1.对于insert, update, delete语句 int count = DbWrapper.executeUpdate(sql); // 2.对于selete语句
java.util.List list = DbWrapper.executeQuery(sql); // 方法一:按名字取值,注意大小写是严格区分的for(int i =0; i < list.size(); i++){
java.util.Map map =(java.util.Map)list.get(i);
out.println(mag.get("column_name").toString());} // 方法二:遍历取值for(int i =0; i < list.size(); i++){
java.util.Map map =(java.util.Map)list.get(i); for(java.util.Iterator it = map.keySet().iterator(); it.hasNext();){
String column_name = it.next().toString());
// 取值时注意null判断
out.println(column_name +" = "+ map.get(column_name) ==null?"": map.get(column_name).toString());}}
| |
jsp数据库连接大全和数据库操作封装到Javabean,古老的榕树,5-wow.com