Two common methods for JDBC to SQL Server

Statement and Preparestatement

The Bookphone database has been established in SQL Server, contains the Bookphone table, there are bookphone classes in Eclipse, three string-type values

1.

import java.sql.Connection;

import Java.sql.DriverManager;

import java.sql.PreparedStatement;

import Java.sql.ResultSet;

import java.sql.SQLException;

Public class JdbcDemo01 {

Private Final Static String URL = "Jdbc:sqlserver://127.0.0.1:1433;databasename=bookphone";

Private Final Static String User = "sa";

Private Final Static String Password = "123456";

Static void Insert (phonebook pb) {

Connection conn=null;

PreparedStatement ps=null;

Try {

Class. forname ("Com.microsoft.sqlserver.jdbc.SQLServerDriver");

conn = DriverManager. getconnection (URL, user, password);

String sqlstring= "INSERT into Bookphone (ph_name,ph_sex,ph_age) VALUES (?,?,?)";

Ps=conn.preparestatement (sqlString);

Ps.setstring (1,pb.getname ());

Ps.setstring (2,pb.getsex ());

Ps.setstring (3,pb.getage ());

Ps.executeupdate ();

Ps.close ();

Conn.close ();

}catch (SQLException e) {

TODO auto-generated Catch block

E.printstacktrace ();

}catch(ClassNotFoundException e) {

E.printstacktrace ();

}

}

Static void Update (phonebook pb,string Oldname) {

Connection conn=null;

PreparedStatement ps=null;

Try {

Class. forname ("Com.microsoft.sqlserver.jdbc.SQLServerDriver");

conn = DriverManager. getconnection (URL, user, password);

String sqlstring= "Update bookphone set ph_name=?,ph_sex=?,ph_age=? where ph_name=? ";

Ps=conn.preparestatement (sqlString);

Ps.setstring (1,pb.getname ());

Ps.setstring (2,pb.getsex ());

Ps.setstring (3,pb.getage ());

Ps.setstring (4,oldname);

Ps.executeupdate ();

Ps.close ();

Conn.close ();

}catch (SQLException e) {

TODO auto-generated Catch block

E.printstacktrace ();

}catch(ClassNotFoundException e) {

E.printstacktrace ();

}

}

Static void Delete (String name) {

Connection conn=null;

PreparedStatement ps=null;

Try {

Class. forname ("Com.microsoft.sqlserver.jdbc.SQLServerDriver");

conn = DriverManager. getconnection (URL, user, password);

String sqlstring= "Delete bookphone where ph_name=?";

Ps=conn.preparestatement (sqlString);

Ps.setstring (1,name);

Ps.executeupdate ();

Ps.close ();

Conn.close ();

}catch (SQLException e) {

TODO auto-generated Catch block

E.printstacktrace ();

}catch(ClassNotFoundException e) {

E.printstacktrace ();

}

}

Static Phonebook Requestbyname (String name) {

Connection conn=null;

PreparedStatement ps=null;

Phonebook pb=NULL;

Try {

Class. forname ("Com.microsoft.sqlserver.jdbc.SQLServerDriver");

conn = DriverManager. getconnection (URL, user, password);

String sqlstring= "SELECT * from Bookphone where ph_name=?";

Ps=conn.preparestatement (sqlString);

Ps.setstring (1,name);

ResultSet Rs=ps.executequery ();

while (Rs.next ()) {

pb=New phonebook ();

Pb.setname (rs.getstring (1));

Pb.setsex (rs.getstring (2));

Pb.setage (Rs.getstring (3));

System. out. Print (Rs.getstring (2) + ",");

System. out. Print (Rs.getstring (3));

}

Rs.close ();

Ps.close ();

Conn.close ();

}catch (SQLException e) {

TODO auto-generated Catch block

E.printstacktrace ();

}catch(ClassNotFoundException e) {

E.printstacktrace ();

}

return PB;

}

Public Static void Main (string[] args) {

Phonebook pb1=New Phonebook ("Wang Damao", "male", "14");

Phonebook pb2=New phonebook ("Wang Xiao", "male", "14");

Insert (PB1);

System. out. println (requestbyname("Wang Damao"));

Delete ("Wang Damao");

}

}

2.

import java.sql.Connection;

import Java.sql.DriverManager;

import Java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

Public class Jdbcdemo {

Private Final Static String URL= "Jdbc:sqlserver://localhost:1433;database=bookphone";

Private Final Static String User= "sa";

Private Final Static String Password= "123456";

Static void Insert () {

String name= "Li Guo";

String sex= "Male";

String age= "12";

Try {

Class. forname ("Com.microsoft.sqlserver.jdbc.SQLServerDriver");

Connection Conn=drivermanager. getconnection (URL,user,password);

String sqlstring= "INSERT into Bookphone (ph_name,ph_sex,ph_age)"

+ "VALUES (" + "'" "+name+" ', ' "+sex+" ', ' "+age+" ') ";

Statement stmt=conn.createstatement ();

Stmt.executeupdate (sqlString);

Stmt.close ();

Conn.close ();

}catch(ClassNotFoundException e) {

E.printstacktrace ();

}catch(SQLException e) {

E.printstacktrace ();

}

}

Static void Update (phonebook pb,string Oldname) {

String Name=pb.getname ();

String Sex=pb.getsex ();

String Age=pb.getage ();

Try {

Class. forname ("Com.microsoft.sqlserver.jdbc.SQLServerDriver");

Connection Conn=drivermanager. getconnection (URL,user,password);

String sqlstring= "Update bookphone set ph_name= '" +name+ "', ph_sex= '" +sex+ "', ph_age= '" +age+ "' Where Ph_name= '" +oldname + "'";

Statement stmt=conn.createstatement ();

Stmt.executeupdate (sqlString);

Stmt.close ();

Conn.close ();

}catch(ClassNotFoundException e) {

E.printstacktrace ();

}catch(SQLException e) {

E.printstacktrace ();

}

}

Static void Delete (String name) {

Try {

Class. forname ("Com.microsoft.sqlserver.jdbc.SQLServerDriver");

Connection Conn=drivermanager. getconnection (URL,user,password);

String sqlstring= "Delete bookphone where ph_name= '" +name+ "'";

Statement stmt=conn.createstatement ();

Stmt.executeupdate (sqlString);

Stmt.close ();

Conn.close ();

}catch(ClassNotFoundException e) {

E.printstacktrace ();

}catch(SQLException e) {

E.printstacktrace ();

}

}

Static void request () {

Try {

Class. forname ("Com.microsoft.sqlserver.jdbc.SQLServerDriver");

Connection Conn=drivermanager. getconnection (URL,user,password);

String sqlstring= "SELECT * from Bookphone";

Statement stmt=conn.createstatement ();

ResultSet rs=stmt.executequery (sqlString);

while (Rs.next ()) {

System. out. Print (rs.getstring (1) + ",");

System. out. Print (Rs.getstring (2) + ",");

System. out. println (rs.getstring (3));

}

System. out. println ();

Stmt.close ();

Conn.close ();

}catch(ClassNotFoundException e) {

E.printstacktrace ();

}catch(SQLException e) {

E.printstacktrace ();

}

}

Public Static void Main (string[] args) {

Phonebook pb=New phonebook ("Lee Puppy Egg", "male", "12");

Insert ();

Update (Pb, "Li Guo");

Delete ("barry55");

Request ();

}

}

Two common methods for JDBC to SQL Server