package cookie;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.mysql.jdbc.Statement;
/**
* Servlet implementation class Insertjdbc
*/
@WebServlet("/Insertjdbc")
public class Insertjdbc extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public Insertjdbc() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("utf-8");
String name = request.getParameter("name");
String phone = request.getParameter("phone");
String address = request.getParameter("address");
try{
Class.forName("com.mysql.jdbc.Driver");//加载驱动器
PrintWriter pw = response.getWriter();
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test?serverTimezone=UTC","root","123");
String sql = "select * from addbook where name = ?";
PreparedStatement stat = con.prepareStatement(sql);
stat.setString(1, name);
ResultSet rs = stat.executeQuery();
pw.write(name.length());
if(name.length()==0){
pw.write("名字不能为空,请检查!点击链接返回");
}
else if(rs.next()){//原数据库是否已存在主码
pw.write("联系人已存在,请检查!点击链接返回");
}
else {
PreparedStatement pst = con.prepareStatement("insert into addbook(name,phone,address) values(?,?,?)");
pst.setString(1, name);
pst.setString(2, phone);
pst.setString(3, address);
int j = pst.executeUpdate();
pw.write("信息保存成功,点击链接查看查看所有信息");
pst.close();
}
rs.close();
con.close();
pw.close();
}catch(Exception ex){
ex.printStackTrace();
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}