Statement和prepareStatement

sql server中已建立BookPhone数据库，包含bookPhone表，eclipse中有BookPhone类，三个string类型的值

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("王大毛","男","14");

PhoneBook pb2=new PhoneBook("王小毛","男","14");

insert(pb1);

System.out.println(requestByName("王大毛"));

delete("王大毛");

}

}

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="李狗蛋";

String sex="男";

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("李小狗蛋","男","12");

insert();

update(pb,"李狗蛋");

delete("barry55");

request();

}

}