Jdbc连Sybase数据库的几种方法_MySQL

SybaseJDBC

1.单用一个JSP文件测试SYBASE jconnect-5_2 JDBC数据库接口：

JSP测试SYBASE jconnect-5_2 JDBC数据库接口




Class.forName("com.sybase.jdbc2.jdbc.SybDriver");
String url ="jdbc:sybase:Tds:localhost:2638";
Connection conn= DriverManager.getConnection(url, "dba","sql");
Statement stmt=conn.createStatement();
String sql="select emp_lname,dept_id,street,city,state from employee order by emp_lname";
ResultSet rs=stmt.executeQuery(sql);
while(rs.next()) {
out.print("");
out.print("");
out.print("");
out.print("");
out.print("");
}
%>

"+rs.getString("emp_lname")+"

"+rs.getString("dept_id")+"

"+rs.getString("street")+"

"+rs.getString("city")+"

"+rs.getString("state")+"

---

rs.close();
stmt.close();
conn.close();
%> 

 

 

2.再用JSP和Java Bean的方法:
JSP Code:

ResultSet rs=sybase.Query("select * from tjck_dh");
while(rs.next()) {
out.print("|"+rs.getString("name")+"|");
out.print(rs.getString("card_no")+"|");
out.print(rs.getString("amount")+"|");
out.print(rs.getString("home_call")+"|");
out.print(rs.getString("office_call")+"|
");
}
rs.close();
%>

---

 

Bean的代码:

package test;
import java.sql.*;

public class sybconn {
// String sDBDriver = "com.sybase.jdbc2.jdbc.SybDriver"; 
String sConnStr = "jdbc:sybase:Tds:localhost:2638";
// String user="dba";
// String passwd="sql";
Connection conn = null;
ResultSet rs = null;

public ResultSet Query(String sql) throws SQLException,Exception {
Class.forName("com.sybase.jdbc2.jdbc.SybDriver").newInstance();
conn = DriverManager.getConnection(sConnStr,"dba","sql");
Statement stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
return rs;
}
}

 

3.利用JDBC(SYBAE jconnect-5_2)查询Sybase ASA7.0中数据的图形化Java程序范例:

//
//   一个简单的利用JDBC(SYBAE jconnect-5_2)查询Sybase ASA7.0中数据的图形化Java程序范例
//    执行的SQL语句是" select * from employee "  ,可以改成自己所需的.
//    运行方式为: c:\> java JDBCTest 
//

import java.awt.*;     
import java.sql.*;   // 在使用JDBC之前，必须引入JAVA的SQL包

class JDBCTest extends Frame {
TextArea myTextArea;
public JDBCTest () {
//设定程序的显示界面
super("一个简单的利用JDBC(jconnect-5_2)查询Sybase ASA7.0中数据的图形化Java程序范例");
setLayout(new FlowLayout());
myTextArea = new TextArea(30,80);
add(myTextArea);
resize(500,500);
show();
myTextArea.appendText("数据库查询中，请等待......\n");
}
void displayResults(ResultSet results) throws SQLException {
//首先得到查询结果的信息
ResultSetMetaData resultsMetaData = results.getMetaData();
int cols = resultsMetaData.getColumnCount();
//将等待信息清除
myTextArea.setText("");
//显示结果
while(results.next()) {
for(int i=1;iif(i>1)
myTextArea.appendText("\t");
try{
myTextArea.appendText(results.getString(i));
}
// 捕获空值时产生的异常
catch(NullPointerException e){
}
}
myTextArea.appendText("\n");
}
}

public boolean handleEvent(Event evt) {
if (evt.id == Event.WINDOW_DESTROY) {
System.exit(0);
return true;
}
return super.handleEvent(evt);
}

public static void main(String argv[]) throws SQLException,Exception {
//设定查询字串
String queryString = "select * from employee";
JDBCTest myJDBCTest = new JDBCTest();
//加载驱动程序
Class.forName("com.sybase.jdbc2.jdbc.SybDriver").newInstance();
//建立连接,localhost为主机名,dba为用户名，sql为密码
Connection myConn = DriverManager.getConnection("jdbc:sybase:Tds:localhost:2638","dba","sql");
Statement myStmt = myConn.createStatement();
//执行查询
ResultSet myResults = myStmt.executeQuery(queryString);
myJDBCTest.displayResults(myResults);
//关闭所有打开的资源
myResults.close();
myStmt.close();
myConn.close();
}
}