登入界面java jsp_JSP登入界面（HTML+JavaBan）
运用JavaBean封装数据库，简单的JSP登入界面,我在看代码之前，先说下用到的文件，总共会用到5个文件。
1.index.jsp:登入成功界面(一个空文件)2.login.jsp：登入界面3. LoginACtion.jsp ：登入判断，中间跳转界面
4.usres.java:用户名注册界面 5.ORMDBUtil.java:后台连接数据库
1.login.jsp
Insert title here.thred{
}
function on_submit(){
if((form1.username.value!="admin")||(form1.userpassword.value!="admin"))
{
alter("账户或密码错误");
form1.username.focus();
return false;
}
学生选课管理系统后台管理登入
用户名：密 码：2.LoginACtion.jsp
Insert title hereString name=request.getParameter("username");
String password=request.getParameter("userpassword");
String sql="select * from admin where username='"+name+"'and password= '"+password+"'";
ResultSet rs=db.Query(sql);
if(rs.next())
response.sendRedirect("index.jsp");
else
response.sendRedirect("login.jsp");
%>
3.usres.java
package com.po;
public class usres {
private String username ;
private String password ;
public usres(){}
{}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
4.ORMDBUtil.java
package com.po;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
public class ORMDBUtil {
/**
*
* @return
* @throws SQLException
* @throws ClassNotFoundException
* @throws ClassNotFoundException
*/
public Connection getConnection() throws SQLException,
InstantiationException,IllegalAccessException,
ClassNotFoundException{
Connection conn = null;
Class.forName( "com.microsoft.sqlserver.jdbc.SQLServerDriver");
String url= "jdbc:sqlserver://localhost:1433;DatabaseName=student ";
String user = "sa";
String password = "12345";
conn = DriverManager.getConnection(url, user, password);
return conn;
}
/**
*
* @param sql
* @return
* @throws Exception
*/
@SuppressWarnings("rawtypes")
public ResultSet Query(String sql){
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try {
conn = getConnection();
} catch (InstantiationException | IllegalAccessException
| ClassNotFoundException | SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
stmt = conn.createStatement();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
rs = stmt.executeQuery(sql);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return rs;
}
}