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在JSP中访问数据库大全_MySQL

Jun 01, 2016 pm 02:10 PM
jspcontentEncyclopediadatabaseaccess

  
现在有好多初学jsp的网友经常会问数据库怎么连接啊,怎么老出错啊?所以我集中的在这写篇文章供大家参考,其实这种把数据库逻辑全部放在jsp里未必是好的做法,但是有利于初学者学习,所以我就这样做了,当大家学到一定程度的时候,可以考虑用MVC的模式开发。在练习这些代码的时候,你一定将jdbc的驱动程序放到服务器的类路径里,然后要在数据库里建一个表test,有两个字段比如为test1,test2,可以用下面SQL建 create table test(test1 varchar(20),test2 varchar(20),然后向这个表写入一条测试纪录,那么现在开始我们的jsp和数据库之旅吧。 



一、jsp连接Oracle8/8i/9i数据库(用thin模式) 
testoracle.jsp如下: 
 
 
 

 
String url="jdbc:oracle:thin:@localhost:1521:orcl"; 
//orcl为你的数据库的SID 
String user="scott"; 
String password="tiger"; 
Connection conn= DriverManager.getConnection(url,user,password); 
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); 
String sql="select * from test"; 
ResultSet rs=stmt.executeQuery(sql); 
while(rs.next()) {%> 
您的第一个字段内容为: 
您的第二个字段内容为: 
 
 
stmt.close(); 
conn.close(); 
%> 
 
 



二、jsp连接Sql Server7.0/2000数据库 
testsqlserver.jsp如下: 
 
 
 
 
String url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=pubs"; 
//pubs为你的数据库的 
String user="sa"; 
String password=""; 
Connection conn= DriverManager.getConnection(url,user,password); 
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); 
String sql="select * from test"; 
ResultSet rs=stmt.executeQuery(sql); 
while(rs.next()) {%> 
您的第一个字段内容为: 
您的第二个字段内容为: 
 
 
stmt.close(); 
conn.close(); 
%> 
 
 



三、jsp连接DB2数据库 
testdb2.jsp如下: 
 
 
 
 
String url="jdbc:db2://localhost:5000/sample"; 
//sample为你的数据库名 
String user="admin"; 
String password=""; 
Connection conn= DriverManager.getConnection(url,user,password); 
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); 
String sql="select * from test"; 
ResultSet rs=stmt.executeQuery(sql); 
while(rs.next()) {%> 
您的第一个字段内容为: 
您的第二个字段内容为: 
 
 
stmt.close(); 
conn.close(); 
%> 
 
 



四、jsp连接Informix数据库 
testinformix.jsp如下: 
 
 
 
 
String url = 
"jdbc:informix-sqli://123.45.67.89:1533/testDB:INFORMIXSERVER=myserver; 
user=testuser;password=testpassword"; 
//testDB为你的数据库名 
Connection conn= DriverManager.getConnection(url); 
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); 
String sql="select * from test"; 
ResultSet rs=stmt.executeQuery(sql); 
while(rs.next()) {%> 
您的第一个字段内容为: 
您的第二个字段内容为: 
 
 
stmt.close(); 
conn.close(); 
%> 
 
 



五、jsp连接Access数据库 
import ="java.util.*" 
import ="java.io.*" 
import="java.text.*" 
contentType="text/html; charset=gb2312" 
buffer="20kb" 
%>String odbcQuery; 
Connection odbcconn; 
Statement odbcstmt; 
ResultSet odbcrs; 
String username,title,content,work,email,url,time,date; 
String datetime; 
%> 
try{ 
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); 
}catch (ClassNotFoundException e) 
{ out.print ("驱动程序不存在"); 
}  
try{ 
odbcconn = DriverManager.getConnection("jdbc:odbc:db1"); 
odbcstmt = odbcconn.createStatement();      
odbcQuery="Select * From book where datetime>2001-4-26 Order By datetime DESC"; 
odbcrs=odbcstmt.executeQuery(odbcQuery); 
int i=0; 
while (iwhile (odbcrs.next()) 

//*/////////////////////////显示数据库的内容用于调试程序是用// 
int ii; 
try{ 
try{ 
for (ii=1;;ii++) 
out.print ("
Cloumn "+ii+" is: "+odbcrs.getString(ii)); 
}catch (NullPointerException e) { 
out.print ("有空的指针"); 

}catch (SQLException e){ 


odbcrs.close(); 
odbcstmt.close(); 
odbcconn.close(); 
}catch (SQLException e) 
{ out.print (e); 

%> 
Statement
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