JSP中用连接数据库解决思路
日期：2014-05-18 浏览次数：20652 次
JSP中用连接数据库
这是Java文件:
package com.auto.evl;
import java.sql.*;
/**
*
* @author lpeter SQLServer 连接测试
*
*/
public class DBConn {
// 驱动类
static String driverClass =
"com.microsoft.jdbc.sqlserver.SQLServerDriver ";
// 连接字符串
static String url =
"jdbc:microsoft:sqlserver://127.0.0.1:1433;dataBaseName=RestaurantMIS_ShiLiHongZhuang ";
// 密码
static String password = " ";
// 用户名
static String username = "sa ";
// 待执行的 SQL 语句
static String sql = "SELECT * FROM CY_CanTaiBiao ";
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
public DBConn() {
try {
Class.forName(driverClass);
try {
conn = DriverManager.getConnection(url, username, password);
} catch (SQLException e) {
e.printStackTrace();
}
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
}
if (conn == null) {// 连接没有关闭时关闭连接
System.out.print( "数据库连接错误 ");
}
}
public Connection getConnection() {
return this.conn;
}
}
这是JSP文件内容:
<%@ page import= "java.sql.* "%>
<jsp:useBean id= "Test " class= "com.auto.evl.DBConn " scope= "page "/>
<html>
<Body>
<%Test T = new Test();%>
</body>
</html>
这是错误信息:
An error occurred at line: 2 in the jsp file: /src/Login.jsp
Generated servlet error:
D:\jboss-3.2.8.SP1\jboss-3.2.8.SP1\jboss-3.2.8.SP1\server\default\work\jboss.web\localhost\Project\org\apache\jsp\src\Login_jsp.java:45: package com.auto.evl does not exist
com.auto.evl.DBConn Test = null;
------解决方案--------------------
顶
------解决方案--------------------
package com.auto.evl does not exist
=========包不存在
------解决方案--------------------
无法找到这个包 com.auto.evl does not exist
这是Java文件:
package com.auto.evl;
import java.sql.*;
/**
*
* @author lpeter SQLServer 连接测试
*
*/
public class DBConn {
// 驱动类
static String driverClass =
"com.microsoft.jdbc.sqlserver.SQLServerDriver ";
// 连接字符串
static String url =
"jdbc:microsoft:sqlserver://127.0.0.1:1433;dataBaseName=RestaurantMIS_ShiLiHongZhuang ";
// 密码
static String password = " ";
// 用户名
static String username = "sa ";
// 待执行的 SQL 语句
static String sql = "SELECT * FROM CY_CanTaiBiao ";
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
public DBConn() {
try {
Class.forName(driverClass);
try {
conn = DriverManager.getConnection(url, username, password);
} catch (SQLException e) {
e.printStackTrace();
}
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
}
if (conn == null) {// 连接没有关闭时关闭连接
System.out.print( "数据库连接错误 ");
}
}
public Connection getConnection() {
return this.conn;
}
}
这是JSP文件内容:
<%@ page import= "java.sql.* "%>
<jsp:useBean id= "Test " class= "com.auto.evl.DBConn " scope= "page "/>
<html>
<Body>
<%Test T = new Test();%>
</body>
</html>
这是错误信息:
An error occurred at line: 2 in the jsp file: /src/Login.jsp
Generated servlet error:
D:\jboss-3.2.8.SP1\jboss-3.2.8.SP1\jboss-3.2.8.SP1\server\default\work\jboss.web\localhost\Project\org\apache\jsp\src\Login_jsp.java:45: package com.auto.evl does not exist
com.auto.evl.DBConn Test = null;
------解决方案--------------------
顶
------解决方案--------------------
package com.auto.evl does not exist
=========包不存在
------解决方案--------------------
无法找到这个包 com.auto.evl does not exist
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