📄 querystudent.java
字号:
import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class QueryStudent extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws IOException, ServletException {
res.setContentType("text/html;charset=GB2312");
PrintWriter outh = res.getWriter();
outh.println("<HTML><BODY>");
outh.println("<CENTER><H2>");
outh.println("学生表中的记录:<BR><BR></H2>");
String driver = "org.gjt.mm.mysql.Driver";
String url = "jdbc:mysql://127.0.0.1:3306/jxgl";
String user = "sb";
String password = "songbo";
try {
Class.forName(driver);
}
catch(Exception e) {
outh.println("不能加载驱动程序:" + driver);
}
try {
Connection con = DriverManager.getConnection(url,user,password);
Statement smt = con.createStatement();
ResultSet rst = smt.executeQuery("select * from student");
outh.println("<H3>");
while(rst.next()) {
outh.println(rst.getString(1)+" "+rst.getString(2)+" "+rst.getString(3)+" "+rst.getString(4)+" "+rst.getDate(5)+" "+rst.getFloat(6)+"<BR>");
}
outh.println("</CENTER></H3>");
outh.println("</BODY></HTML>");
}
catch(SQLException e) {
outh.println("数据库连接失败!");
}
}
}⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -