addsql_jsp.java
来自「Internet 开发技术分章节代码和自己完成的课程设计全代码（在zuoye文件」· Java 代码 · 共 150 行
JAVA
150 行
package org.apache.jsp;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import java.sql.*;
public final class AddSQL_jsp extends org.apache.jasper.runtime.HttpJspBase
implements org.apache.jasper.runtime.JspSourceDependent {
private static java.util.List _jspx_dependants;
public Object getDependants() {
return _jspx_dependants;
}
public void _jspService(HttpServletRequest request, HttpServletResponse response)
throws java.io.IOException, ServletException {
JspFactory _jspxFactory = null;
PageContext pageContext = null;
HttpSession session = null;
ServletContext application = null;
ServletConfig config = null;
JspWriter out = null;
Object page = this;
JspWriter _jspx_out = null;
PageContext _jspx_page_context = null;
try {
_jspxFactory = JspFactory.getDefaultFactory();
response.setContentType("text/html; charset=GBK");
pageContext = _jspxFactory.getPageContext(this, request, response,
null, true, 8192, true);
_jspx_page_context = pageContext;
application = pageContext.getServletContext();
config = pageContext.getServletConfig();
session = pageContext.getSession();
out = pageContext.getOut();
_jspx_out = out;
out.write("\r\n");
out.write("<html>\r\n");
out.write("<head>\r\n");
out.write("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=GBK\">\r\n");
out.write("<title>数据库操作</title>\r\n");
out.write("</head>\r\n");
out.write("<body>\r\n");
out.write(" <H3>从数据库读取表数据</H3><hr>\r\n");
out.write("<table border=1>\r\n");
out.write("<tr><td>学号</td><td>姓名</td><td>成绩</td></tr>\r\n");
String driverName="sun.jdbc.odbc.JdbcOdbcDriver"; //定义JDBC-ODBC驱动程序对象
String dbName="TestDB"; //定义数据库名
String tableName="student"; //定义数据库中的表名
String userName=""; //定义数据库用户名
String userPasswd=""; //定义数据库存取密码
String conURL="jdbc:odbc:"+dbName; //定义JDBC的URL对象
String sql="SELECT * FROM "+tableName; //定义SQL语言对象
Class.forName(driverName); //加载JDBC-ODBC驱动程序
Connection con=DriverManager.getConnection(conURL,userName,userPasswd);//连接数据库
Statement s=con.createStatement(); //定义查询数据库的对象
ResultSet rs=s.executeQuery(sql); //得到student表查询的结果集
while(rs.next())
{
out.println("<tr>");
out.println("<td>"+rs.getString("id")+"</td>");
out.println("<td>"+rs.getString("name")+"</td>");
out.println("<td>"+rs.getInt("score")+"</td>");
out.println("</tr>");
}
rs.close();
out.write("\r\n");
out.write(" </table>\r\n");
out.write(" ");
//向数据库插入记录
PreparedStatement ps=con.prepareStatement("insert into student values(?,?,?)");
ps.setString(1,"0004");
ps.setString(2,"王刚");
ps.setInt(3,94);
//使用SQL命令insert插入一条到student表中
ps.execute();
ps.close();
out.write("\r\n");
out.write(" <H3>插入后的数据库记录</H3><hr>\r\n");
out.write(" <table border=1>\r\n");
out.write(" <tr><td>学号</td><td>姓名</td><td>成绩</td></tr>\r\n");
Statement s1=con.createStatement();
ResultSet rs1=s1.executeQuery(sql);
while(rs1.next())
{
out.println("<tr>");
out.println("<td>"+rs1.getString("id")+"</td>");
out.println("<td>"+rs1.getString("name")+"</td>");
out.println("<td>"+rs1.getInt("score")+"</td>");
out.println("</tr>");
}
rs1.close();
out.write(" \r\n");
out.write(" </table>\r\n");
out.write(" ");
//修改id="0004"的记录
String up="update student set score=93 where id='0004'";
PreparedStatement ps1=con.prepareStatement(up);
ps1.executeUpdate();
ps1.close();
out.write("\r\n");
out.write("<H3>修改后的数据库记录</H3><hr>\r\n");
out.write("<table border=1>\r\n");
out.write("<tr><td>学号</td><td>姓名</td><td>成绩</td></tr> \r\n");
Statement s2=con.createStatement();
ResultSet rs2=s2.executeQuery(sql);
while(rs2.next())
{
out.println("<tr>");
out.println("<td>"+rs2.getString("id")+"</td>");
out.println("<td>"+rs2.getString("name")+"</td>");
out.println("<td>"+rs2.getInt("score")+"</td>");
out.println("</tr>");
}
rs2.close();
s2.close(); //释放Statement所连接的数据库及JDBC资源
con.close(); //关闭与数据库的连线
out.write(" \r\n");
out.write("</table>\r\n");
out.write("</body>\r\n");
out.write("</html>");
} catch (Throwable t) {
if (!(t instanceof SkipPageException)){
out = _jspx_out;
if (out != null && out.getBufferSize() != 0)
out.clearBuffer();
if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
}
} finally {
if (_jspxFactory != null) _jspxFactory.releasePageContext(_jspx_page_context);
}
}
}
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