Zusammenfassung von Beispielen gängiger Methoden für JSP+MySQL-Datenbankoperationen-PHP开发-php.cn

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Zusammenfassung von Beispielen gängiger Methoden für JSP+MySQL-Datenbankoperationen

高洛峰

Dec 27, 2016 pm 01:41 PM

Die Beispiele in diesem Artikel beschreiben gängige Methoden für JSP+MySQL-Datenbankoperationen. Teilen Sie es als Referenz mit allen. Die Details lauten wie folgt:

1. Anzeigen:

<%@ page contentType="text/html;charset=GB2312" %> 
<%@ page import="java.sql.*" %> 
<HTML><style type="text/css">
<!--
body {
  background-color: #99CCFF;
}
-->
</style> 
<BODY>
<font color="#FFFFFF"> 
<center>
<% Connection con; 
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","123456");
Statement sql; 
ResultSet rs; 
try
{ 
sql=con.createStatement(); 
rs=sql.executeQuery("SELECT * FROM student");
out.print("<Table Border style=&#39;font-size: 10pt&#39;>"); 
out.print("<TR><td colspan=5 align=center>考生数据</td></tr>"); 
out.print("<TR><td colspan=5 align=center><a href=&#39;add.jsp&#39; target=&#39;_self&#39;>添加考生信息</a></td></tr>"); 
out.print("<TR>"); 
out.print("<Td width=50 >"+"姓名"); 
out.print("<Td width=100 >"+"年龄"); 
out.print("<Td width=100>"+"出生日期"); 
out.print("<Td width=100 colspan=2>"+"操作"); 
out.print("</TR>"); 
while(rs.next()) 
{ out.print("<TR>"); 
out.print("<TD >"+rs.getString(2)+"</TD>"); 
out.print("<TD >"+rs.getString(3)+"</TD>"); 
out.print("<TD >"+rs.getString(4)+"</TD>"); 
String idstr=rs.getString(1);
out.print("<TD><a href=&#39;delete.jsp?id="+idstr+"&#39;>删除</a></TD>"); 
out.print("<TD><a href=&#39;update.jsp?id="+idstr+"&#39;>修改</a></TD>"); 
out.print("</TR>") ; 
}
out.print("</Table>"); 
con.close(); 
} 
catch(SQLException e1) 
{ 
out.print("SQL异常！！！！"); 
} 
%> 
</center>
</BODY> 
</HTML>

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2. Hinzufügen:

<%@ page contentType="text/html;charset=gb2312" %>
<HTML><HEAD>
<style type="text/css">
<!--
body {
  background-image: url();
  background-color: #CCCCFF;
}
.STYLE5 {font-family: "Courier New", Courier, monospace; font-size: 14px; }
.STYLE6 {
  font-family: "Courier New", Courier, monospace;
  font-size: 24px;
}
-->
</style>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"></HEAD>
<BODY>
<Font size=2>
<p align="center" class="STYLE6">添加考生信息</p>
<CENTER>
<FORM action="insert.jsp" name=form>
<table>
  <tr><td height="36"><span class="STYLE5">姓名:</span></td>
  <td><Input name="name" type=text size="15" ></td></tr>
  <tr>
   <td height="36"><span class="STYLE5">年龄:</span></td>
  <td><Input name="age" type=text size="15"></td></tr>
  <tr>
   <td height="36"><span class="STYLE5">出生年月:</span></td>
  <td><Input name="birth" type=text size="15"></td></tr>
 </table>
 <table width="165">
  <tr><td width="42" wnameth="42"><Input type=submit name="g" value="添加"></td>
   <td width="28" wnameth="50"> </td>
   <td width="42" wnameth="50"><Input type="reset" name="h" value="重置"></td>
   <td width="33" wnameth="42"> </td>
  </tr>
</table>
</Form></CENTER>
</Body></HTML>

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3 🎜> 4. Update-Beispiel 1:

<%@ page contentType="text/html;charset=gb2312" %> 
<%@ page import="java.sql.*" %> 
<html> 
<head> 
<title>删除操作</title> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"><style type="text/css">
<!--
body {
  background-color: #FFCCFF;
}
-->
</style></head> 
<body> 
<center>
<% Connection con; 
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","123456");
Statement stmt; 
Statement s; 
ResultSet rs; 
String id=request.getParameter("id");
try
{ 
stmt=con.createStatement();
String sql="delete from student where id="+id; 
stmt.executeUpdate(sql); 
s=con.createStatement(); 
rs=s.executeQuery("SELECT * FROM student"); 
out.print("<Table Border style=&#39;font-size: 10pt&#39;>"); 
out.print("<TR><td colspan=5 align=center>考生数据</td></tr>");
out.print("<TR><td colspan=5 align=center><a href=&#39;add.jsp&#39; target=&#39;_self&#39;>添加考生信息</a></td></tr>"); 
out.print("<TR>"); 
out.print("<Td width=50 >"+"姓名"); 
out.print("<Td width=100 >"+"年龄"); 
out.print("<Td width=100>"+"出生日期"); 
out.print("<Td width=100 colspan=2>"+"操作"); 
out.print("</TR>"); 
while(rs.next()) 
{ out.print("<TR>"); 
out.print("<TD >"+rs.getString(2)+"</TD>"); 
out.print("<TD >"+rs.getString(3)+"</TD>"); 
out.print("<TD >"+rs.getString(4)+"</TD>"); 
String idstr=rs.getString(1);
out.print("<TD >"+idstr+"</TD>"); 
out.print("<TD><a href=&#39;delete.jsp?id="+idstr+"&#39;>删除</a></TD>"); 
out.print("<TD><a href=&#39;update.jsp?id="+idstr+"&#39;>修改</a></TD>"); 
out.print("</TR>") ; 
} 
out.print("</Table>"); 
con.close(); 
} 
catch(SQLException e1) 
{ 
out.print("SQL异常！！！！"); 
} 
%>
</center>
</body> 
</html>

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5. Update-Beispiel 2:

<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
<!--
body {
  background-color: #FFCCFF;
}
-->
</style></head>
<body>
<%String id=request.getParameter("id");
 Connection con; 
 String name=null;
 String age=null;
 String birth=null;
 String id1=null;
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","123456");
Statement sql; 
ResultSet rs; 
try
{ 
sql=con.createStatement(); 
rs=sql.executeQuery("SELECT * FROM student");
while(rs.next()) 
{ 
 name=rs.getString(2);
 age=rs.getString(3);
 birth=rs.getString(4);
 id1=rs.getString(1);
}
con.close(); 
} 
catch(SQLException e1) 
{ 
out.print("SQL异常！！！！"); 
} 
%>
<center>
<form action="update2.jsp">
<center>
 <p>  </p>
 <p>姓名：
  <input name="name" type="text" size="15" value="<%=name%>">
 </p>
 <p>
 年龄：
  <input name="age" type="text" size="15" value="<%=age%>">
 </p>
 <p>出生日期：
  <input name="birth" type="text" size="15" value="<%=birth%>">
  <input name="id1" type="hidden" value="<%=id1%>" />
</p>
 <p><input name="g" type="submit" value="修改">     <input name="h" type="reset" value="重置"></p>
</form>
</center>
</body>
</html>

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6. Datenbank erstellen

<%@ page contentType="text/html;charset=gb2312" %>
<%@ page import="java.sql.*" %> 
<%
String name=request.getParameter("name");
String age=request.getParameter("age");
String birth=request.getParameter("birth");
String id1=request.getParameter("id1");
System.out.println(id1);
Connection con=null;
try
{ 
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","123456");
Statement sql; 
sql=con.createStatement(); 
String sql2="update student set name=&#39;"+name+"&#39;,age=&#39;"+age+"&#39;,birth=&#39;"+birth+"&#39; where id="+id1;
System.out.print(sql2);
int s=sql.executeUpdate(sql2);
}
catch(Exception e){
System.out.println(e);
}
%>
恭喜你，修改成功！<br />
<a href="chakan.jsp">查看</a>

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Ich hoffe, dass dieser Artikel für das JSP-Programmierdesign aller hilfreich sein wird.

<%@ page contentType="text/html;charset=gb2312" %>
<%@ page import="java.sql.*" %> 
<%
String name=request.getParameter("name");
String age=request.getParameter("age");
String birth=request.getParameter("birth");
Connection con=null;
try
{ 
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","123456");
Statement sql; 
sql=con.createStatement(); 
String sql2="insert into student(name,age,birth) values(&#39;"+name+"&#39;,&#39;"+age+"&#39;,&#39;"+birth+"&#39;)";
System.out.print(sql2);
int s=sql.executeUpdate(sql2);
}
catch(Exception e){
System.out.println(e);
}
%>
恭喜你，添加成功！<br />
<a href="chakan.jsp">查看</a>

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Weitere Beispiele und Zusammenfassungen gängiger Methoden für JSP+MySQL-Datenbankoperationen finden Sie auf der chinesischen PHP-Website!

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