?? 第5章（1）.txt
字號(hào):
sql.executeUpdate(condition1);
sql.executeUpdate(condition2);
sql.executeUpdate(condition3);
//顯示更新后的表中的記錄：
%>
<P>更新后的表的記錄：
<%
rs=sql.executeQuery("SELECT * FROM students");
out.print("<Table Border>");
out.print("<TR>");
out.print("<TH width=100>"+"學(xué)號(hào)");
out.print("<TH width=100>"+"姓名");
out.print("<TH width=50>"+"數(shù)學(xué)成績(jī)");
out.print("<TH width=50>"+"英語成績(jī)");
out.print("<TH width=50>"+"物理成績(jī)");
out.print("</TR>");
while(rs.next())
{
out.print("<TR>");
number=rs.getString(1);
out.print("<TD >"+number+"</TD>");
xingming=rs.getString(2);
out.print("<TD >"+xingming+"</TD>");
math=rs.getInt("數(shù)學(xué)成績(jī)");
out.print("<TD >"+math+"</TD>");
english=rs.getInt("英語成績(jī)");
out.print("<TD >"+english+"</TD>");
physics=rs.getInt("物理成績(jī)");
out.print("<TD >"+physics+"</TD>");
out.print("</TR>") ;
}
out.print("</Table>");
con.close();
}
catch(SQLException e)
{ }
%>
</FONT>
</BODY>
</HTML>
例子9（效果如圖5.24、5.25所示）
Example5_9.jsp:
<%@ page contentType="text/html;charset=GB2312" %>
<%@ page import="java.sql.*" %>
<HTML>
<BODY bgcolor=pink >
<Font size=1>
<P>添加新的記錄到數(shù)據(jù)庫：
<FORM action="newDatabase.jsp" method=post>
同學(xué)學(xué)號(hào)：
<Input type="text" name="number">
<BR>同學(xué)姓名：
<Input type="text" name="name">
<BR>數(shù)學(xué)成績(jī)：
<Input type="text" name="math">
<BR>英語成績(jī)：
<Input type="text" name="english">
<BR>物理成績(jī)：
<Input type="text" name="physics">
<BR><Input type="submit" name="b" value="提交添加">
<P>數(shù)據(jù)庫添加記錄前的數(shù)據(jù)記錄是：
<% String name,number;
int math,physics,english;
Connection con;
Statement sql;
ResultSet rs;
try{Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}
catch(ClassNotFoundException e){}
try { con=DriverManager.getConnection("jdbc:odbc:moon","sa","");
sql=con.createStatement();
rs=sql.executeQuery("SELECT * FROM students");
out.print("<Table Border>");
out.print("<TR>");
out.print("<TH width=100>"+"學(xué)號(hào)");
out.print("<TH width=100>"+"姓名");
out.print("<TH width=50>"+"數(shù)學(xué)成績(jī)");
out.print("<TH width=50>"+"英語成績(jī)");
out.print("<TH width=50>"+"物理成績(jī)");
out.print("</TR>");
while(rs.next())
{ out.print("<TR>");
number=rs.getString(1);
out.print("<TD >"+number+"</TD>");
name=rs.getString(2);
out.print("<TD >"+name+"</TD>");
math=rs.getInt("數(shù)學(xué)成績(jī)");
out.print("<TD >"+math+"</TD>");
english=rs.getInt("英語成績(jī)");
out.print("<TD >"+english+"</TD>");
physics=rs.getInt("物理成績(jī)");
out.print("<TD >"+physics+"</TD>");
out.print("</TR>") ;
}
out.print("</Table>");
con.close();
}
catch(SQLException e1) {}
%>
</Font>
</BODY>
</HTML>
newDatabase.jsp：
<%@ page contentType="text/html;charset=GB2312" %>
<%@ page import="java.sql.*" %>
<HTML>
<BODY bgcolor=pink ><Font size=1>
<% //獲取提交的學(xué)號(hào)：
String number=request.getParameter("number");
if(number==null)
{number="";
}
byte b[]=number.getBytes("ISO-8859-1");
number=new String(b);
//獲取提交的姓名：
String name=request.getParameter("name");
if(name==null)
{name="";
}
byte c[]=name.getBytes("ISO-8859-1");
name=new String(c);
//獲取提交的新的數(shù)學(xué)成績(jī)：
String m=request.getParameter("math");
if(m==null)
{m="-100"; }
//獲取提交的新的英語成績(jī)：
String e=request.getParameter("english");
if(e==null)
{e="-100"; }
//獲取提交的新的物理成績(jī)：
String p=request.getParameter("physics");
if(p==null)
{p="-100"; }
Connection con=null;
Statement sql=null;
ResultSet rs=null;
try{Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); }
catch(ClassNotFoundException event){}
try {con=DriverManager.getConnection("jdbc:odbc:moon","sa","");
sql=con.createStatement();
String condition=
"INSERT INTO students VALUES"+"("+"'"+number+"','"+name+"',"+m+","+e+","+p+")";
sql.executeUpdate(condition); //執(zhí)行添加操作：
//顯示添加新記錄后表中的記錄：
%>
<P>添加新記錄后的表：
<%
rs=sql.executeQuery("SELECT * FROM students ORDER BY 學(xué)號(hào) ");
out.print("<Table Border>");
out.print("<TR>");
out.print("<TH width=100>"+"學(xué)號(hào)");
out.print("<TH width=100>"+"姓名");
out.print("<TH width=50>"+"數(shù)學(xué)成績(jī)");
out.print("<TH width=50>"+"英語成績(jī)");
out.print("<TH width=50>"+"物理成績(jī)");
out.print("</TR>");
while(rs.next())
{ out.print("<TR>");
String n=rs.getString(1);
out.print("<TD >"+n+"</TD>");
String xingming=rs.getString(2);
out.print("<TD >"+xingming+"</TD>");
int math=rs.getInt("數(shù)學(xué)成績(jī)");
out.print("<TD >"+math+"</TD>");
int english=rs.getInt("英語成績(jī)");
out.print("<TD >"+english+"</TD>");
int physics=rs.getInt("物理成績(jī)");
out.print("<TD >"+physics+"</TD>");
out.print("</TR>") ;
}
out.print("</Table>");
con.close();
}
catch(SQLException event)
{ }
%>
</FONT>
</BODY>
</HTML>
例子10（效果如圖5.26、5.27所示）
Example5_10.jsp：
<%@ page contentType="text/html;charset=GB2312" %>
<%@ page import="java.sql.*" %>
<HTML>
<BODY bgcolor=pink >
<Font size=1>
<P>刪除記錄：
<FORM action="delete.jsp" method=post>
輸入被刪除記錄的學(xué)號(hào)：
<Input type="text" name="number">
<BR>
<BR><Input type="submit" name="b" value="提交刪除">
</FORM>
<P>數(shù)據(jù)庫刪除前的數(shù)據(jù)記錄是：
<% String name,number;
int math,physics,english;
Connection con;
Statement sql;
ResultSet rs;
try{Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}
catch(ClassNotFoundException e){}
try { con=DriverManager.getConnection("jdbc:odbc:sun","sa","");
sql=con.createStatement();
rs=sql.executeQuery("SELECT * FROM students");
out.print("<Table Border>");
out.print("<TR>");
out.print("<TH width=100>"+"學(xué)號(hào)");
out.print("<TH width=100>"+"姓名");
out.print("<TH width=50>"+"數(shù)學(xué)成績(jī)");
out.print("<TH width=50>"+"英語成績(jī)");
out.print("<TH width=50>"+"物理成績(jī)");
out.print("</TR>");
while(rs.next())
{ out.print("<TR>");
number=rs.getString(1);
out.print("<TD >"+number+"</TD>");
name=rs.getString(2);
out.print("<TD >"+name+"</TD>");
math=rs.getInt("數(shù)學(xué)成績(jī)");
out.print("<TD >"+math+"</TD>");
english=rs.getInt("英語成績(jī)");
out.print("<TD >"+english+"</TD>");
physics=rs.getInt("物理成績(jī)");
out.print("<TD >"+physics+"</TD>");
out.print("</TR>") ;
}
out.print("</Table>");
con.close();
}
catch(SQLException e1) {}
%>
</Font>
</BODY>
</HTML>
delete.jsp：
<%@ page contentType="text/html;charset=GB2312" %>
<%@ page import="java.sql.*" %>
<HTML>
<BODY bgcolor=pink ><Font size=1>
<% //獲取提交的學(xué)號(hào)：
String number=request.getParameter("number");
if(number==null)
{number="";
}
byte b[]=number.getBytes("ISO-8859-1");
number=new String(b);
Connection con=null;
Statement sql=null;
ResultSet rs=null;
try{Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}
catch(ClassNotFoundException event){}
try {con=DriverManager.getConnection("jdbc:odbc:sun","sa","");
sql=con.createStatement();
//刪除操作：
String deleteAll="DELETE FROM students WHERE 學(xué)號(hào)"+" = "+"'"+number+"'";
sql.executeUpdate(deleteAll);
%>
<P>刪除記錄后的表：
<%
rs=sql.executeQuery("SELECT * FROM students ORDER BY 學(xué)號(hào) ");
out.print("<Table Border>");
out.print("<TR>");
out.print("<TH width=100>"+"學(xué)號(hào)");
out.print("<TH width=100>"+"姓名");
out.print("<TH width=50>"+"數(shù)學(xué)成績(jī)");
out.print("<TH width=50>"+"英語成績(jī)");
out.print("<TH width=50>"+"物理成績(jī)");
out.print("</TR>");
while(rs.next())
{ out.print("<TR>");
String n=rs.getString(1);
out.print("<TD >"+n+"</TD>");
String xingming=rs.getString(2);
out.print("<TD >"+xingming+"</TD>");
int math=rs.getInt("數(shù)學(xué)成績(jī)");
out.print("<TD >"+math+"</TD>");
int english=rs.getInt("英語成績(jī)");
out.print("<TD >"+english+"</TD>");
int physics=rs.getInt("物理成績(jī)");
out.print("<TD >"+physics+"</TD>");
out.print("</TR>") ;
}
out.print("</Table>");
con.close();
}
catch(SQLException event)
{out.print(""+event);
}
%>
</FONT>
</BODY>
</HTML>
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