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LP TRNH NG DNG JAVA

Nguyn Hong Anh

JDBC C BN

(JAVA DATABASE CONNECTIVITY)

Ni dung

Giithiu JDBC

Mts Class v Interface ca JDBC API thng dng

Mtskthutcbnsdng JDBC

ng k driver, M & ngktnicsdliu

Thchinly, xa, cpnht, thm dliu

ExecuteBath

X l li v ngoil

Transaction

Gi Store Procedure

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GIITHIU JDBC

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JDBC

JDBC (Java database connectivity) cung cp cho javadeveloper tp cc interface chun dng truy xutdliu quan h.

JDBC c pht trinbi JavaSoft

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Kin trc JDBC Khi lm vic vi JDBD, java developer s lm vic

nh nhau ivi cc hcsdliu khc nhau.

Java developer khng phthuc vo mthcsdliucth no.

Java developer khng cnphi quan tm ns khcnhau khi giao tipvi cc HQTCSDL khc nhau.

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Kin trc JDBC

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Java Application

JDBC Driver Manager

JDBC Drivers

Database

JDBC API

JDBC Driver API

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Kin trc JDBC

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Java Application

JDBC Driver Manager

SQLServerDriver

MySQLDriver

OracleDriver

ODBC BridgeDriver

DB2Driver

ODBC BridgeManager

AccessDriver

dBaseDriver

Access dBase SQL Server MySQL Oracle DB2

JDBC

Java Application

1. Mktni

2. Gi SQL

3. Rt trch dliu

4.ngktni

DBMS

1. To phin ktni

2. Thc thi SQL

3. Trktqu

4.ng phin ktni

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JDBC API

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JDBC Interfaces

Class v Interface ca JDBC API thuc gijava.sql

DriverManager dng np cc driver v to

Connection ncsdliu. Driver: Driver ca c s d liu, mi JDBC Driver

u ci tli Interface ny.

Connection :Thit lpmt Connection n c s dliu v cho php to cc Statement .

Statement: Gnktvimt connection ncsdliu v cho php thc thi cc cu lnh SQL.CallableStatement tng t Statement nhng pdng cho Store procedures.

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JDBC API

PreparedStatement: Tngtnh Statement nhngp dng cho Precompiled SQL.

ResultSet: Cung cp thng tin rt trch tcsdliu , cho php truy xut cc dng dliu.

ResultSetMetaData: Cung cp cc thng tin nhkiudliu v cc thuc tnh trong Resultset.

DatabaseMetaData: Cung cp cc thng tin cacsdliuktni.

SQLException: Cung cp thng tin cc ngoilxy rakhi tng tc vicsdliu.

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JDBC API

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DriverManager

Connection Connection Connection

Statement Statement

ResultSet ResultSet

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MT S K THUT C BNSDNG JDBC

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Mtskthutcbnsdng JDBC

ng k driver

M & ngktnicsdliu

Thchinly, xa, cpnht, thm dliu

ExecuteBath

X l li v ngoil

Transaction

Gi Store Procedure

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ng k Driver - MySQL Bc 1: Thm thvin JDBC Driver vo ngdng

Bc 2:ng k Driver - MySQL

Cch 1: Class.forName :

Class.forName(org.gjt.mm.mysql.Driver);

Cch 2: DriverManager.registerDriver

Driver driver = new org.gjt.mm.mysql.Driver()

DriverManager.registerDriver(driver);

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M & ngktnicsdliu

itng Connection ctot getConnection ca DriverManager

Connection getConnection (String url);

Connection getConnection (String url, String user, String password); Connection getConnection (String url, java.util.Properties info);

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Mktnicsdliu - MySQL

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JDBC

Java

Application

MYSQL

DBMS

QLNV

Port 3306

URL jdbc:mysql://localhost:3306/BookOnline

Domain localhost

Username root

Password root

Username root

Password root

Driver MySQL JDBC Driver

Csdliu BookOnline

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MaDanhMuc:Auto Increment

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M & ngktnicsdliu - MySQL

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importjava.sql.Connection; importjava.sql.Driver;importjava.sql.DriverManager; importjava.sql.SQLException;

importjava.util.Properties;publicclass TestJDBC {

publicstaticvoidmain(String[] args) {try {

Driver driver = new org.gjt.mm.mysql.Driver();DriverManager.registerDriver(driver);

String conString="jdbc:mysql://localhost:3306/BookOnline";Properties info = new Properties();info.setProperty("characterEncoding", "utf8");

info.setProperty("user", "root");info.setProperty("password", "root");

Connection connection =DriverManager.getConnection(conString, info);

. . .connection.close();

} catch (SQLException ex) { System.out.println(ex);}}

}

Cc cu lnh SQL

SELECT : Truy vndliutbng

DELETE : Xa dliutbng

UPDATE : Cpnhtdliu vo bng

INSERT : Thm dliu vo bng

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To v thc thi cc cu lnh SQL Statementstatement = connection.createStatement() ;

ResultSet executeQuery (String sql)

int executeUpdate (String sql)

boolean execute (String sql)

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Lydliutbng

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Row

Result Set

rs.next()

ResultSet executeQuery (String sql)

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Lydliutbng - DanhMuc

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. . .Statement statement = connection.createStatement();

String sql = SELECT * FROM DanhMuc;ResultSet rs = statement.executeQuery(sql);

while (rs.next()){int maDanhMuc = rs.getInt(MaDanhMuc);String tenDanhMuc = rs.getString(tenDanhMuc);System.out.print(maDanhMuc+ );System.out.println(tenDanhMuc);

}

connection.close();

. . .

Lydliutbng - Sach

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. . .Statement statement = connection.createStatement();String sql = Select * From Sach Where MaDanhMuc = 1;ResultSet rs = statement.executeQuery(sql);while (rs.next()){

String maSach = rs.getString(MaSach);String tenSach = rs.getString(TenSach);Double giaBan= rs.getDouble(GiaBan);String soLuong = rs.getInt(SoLuong);int maDanhMuc = rs.getInt(maDanhMuc);

System.out.println(. . .);}

Connection.close();

. . .

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Xa dliu - DanhMuc

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. . .Statement statement = connection.createStatement();

String sql = DELETE FROM DANHMUC WHERE MADANHMUC = 1;int n = statement.executeUpdate (sql);

if (n == 1){System.out.println(Mt danh mcc xa);

}else{System.out.println(Li);

}connection.close();

. . .

Xa dliu - Sach

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. . .Statement statement = connection.createStatement();String sql = DELETE FROM SACH WHERE MADANHMUC = 1;int n = statement.executeUpdate (sql);if (n >= 1){

System.out.println(n + Sch c xa);}else{

System.out.println(Li);}

connection.close();

. . .

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Cpnhtdliu - DanhMuc

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. . .int maDanhMuc = . . .

String tenDanhMuc = . . .Statement statement = connection.createStatement();

String sql = String.format(UPDATE DANHMUCSET TENDANHMUC = %sWHERE MADANHMUC= %d,

maDanhMuc, tenDanhMuc);

int n = statement.executeUpdate (sql);if (n == 1){

System.out.println(Cpnht thnh cng);}else{

System.out.println(Li);}connection.close();

. . .

Cpnhtdliu - Sach

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. . .String maSach = . . .double giaBan = . . .

int soLuong = . . .Statement statement = connection.createStatement();

String sql = String.format(UPDATE SACHSET GIABAN = %f,

SOLUONG = %dWHERE MASACH = %s,

giaBan, soLuong, maSach);int n = statement.executeUpdate (sql);

if (n == 1){System.out.println(Cpnht thnh cng);

}else{System.out.println(Li);

}

connection.close();

. . .

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Thm dliu - Sach

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. . .String maSach = . . .

String tenSach = . . .double giaBan = . . .

int soLuong = . . .int maDanhMuc = . . .

Statement statement = connection.createStatement();String sql = String.format(INSERT INTO SACH (MaSach, TenSach,GiaBan, SoLuong, MaDanhMuc) VALUES(%s, %s, %f, %d, %d),

maSach, tenSach, giaBan, soLuong, maDanhMuc);

int n = statement.executeUpdate (sql);if (n == 1){

System.out.println(Thm sch thnh cng);}else{

System.out.println(Li);}connection.close();

. . .

Thm dliu - DanhMuc

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. . .String tenDanhMuc = . . .Statement statement = connection.createStatement();

String sql = String.format(INSERT INTO DANHMUC (TENDANHMUC)VALUES(%s),tenDanhMuc);int n = statement.executeUpdate (sql);if (n == 1){

System.out.println(Thm danh mc thnh cng);}else{

System.out.println(Li);}

connection.close();

. . .

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Thm dliu - DanhMuc

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. . .String tenDanhMuc = "C++";

String sql= String.format("INSERT INTO DANHMUC(TENDANHMUC)

VALUES (%s)", tenDanhMuc);int n=stm.executeUpdate(sql, Statement.RETURN_GENERATED_KEYS);if(n>0){

System.out.println("Thm thnh cng");ResultSet rs=statement.getGeneratedKeys();

if(rs.next()){int maDanhMuc = rs.getInt(1);

System.out.println("M danh mcva thm: "+maDanhMuc);}

}connection.close();

Thm dliu - DanhMuc

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. . .String [] tenDanhMucs = {"C++", "C#", "Java"};String sql="INSERT INTO DANHMUC(TENDANHMUC) VALUES ";

for(int i=0; i

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ExecuteBath

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. . .String sql1="INSERT INTO DANHMUC(TENDANHMUC) VALUES('Java')";

String sql2="INSERT INTO DANHMUC(TENDANHMUC) VALUES('PHP')";String sql3="UPDATE DANHMUC SET TENDANHMUC='C' WHERE

MADANHMUC=43";Statement statement=connection.createStatement();

statement.addBatch(sql1);statement.addBatch(sql2);

statement.addBatch(sql3);int [] n = statement.executeBatch();

. . .

X l ngoil

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try {Driver driver = new org.gjt.mm.mysql.Driver();DriverManager.registerDriver(driver);

String cs = . . .Properties info = new Properties();

. . .Connection connect =DriverManager.getConnection( cs, info);

try{Statement statement=connection.createStatement();

. . .}catch (SQLException ex){

//X l li}finally{

//ngktniconnection.close();

}

} catch (SQLException ex) {//X l li

}

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PreparedStatement

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. . .String maSach = . . ; String tenSach = . . ;

double giaBan = . . ; int soLuong = . . .; int maDanhMuc = . . .PreparedStatement statement = connection.prepareStatement();

String sql = INSERT INTO SACH (MaSach, TenSach, GiaBan,SoLuong, MaDanhMuc) VALUES(?,?,?,?,?);statement.setString (1, maSach);statement.setString (2, tenSach);

statement.setDouble (3, giaBan);statement.setInt (4, soLuong);

statement.setInt (5, maDanhMuc);int n = statement.executeUpdate (sql);

if (n == 1){System.out.println(Thm sch thnh cng);

}else{

System.out.println(Li);}

connection.close();

. . .

Sdng Transaction

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try {String sql1= insert/delete/update . . .String sql2= insert/delete/update . . .

Connection con =DriverManager.getConnection( cs, info);try{

con .setAutoCommit(false);Statement statement1= con.createStatement();

Statement statement2= con.createStatement();statement1.executeUpdate(sql1);

statement2.executeUpdate(sql2);con.commit();

}catch (SQLException ex){con.rollBack();

}finally{con.close();

}

} catch (SQLException ex) {//X l li

}

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Sdng Transaction

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String sql1= insert/delete/update . . .String sql2= insert/delete/update . . .

Connection con =DriverManager.getConnection( cs, info);try{

con .setAutoCommit(false);Statement statement1= con.createStatement();

Statement statement2= con.createStatement();statement1.executeUpdate(sql1);

statement2.executeUpdate(sql2);if(iukin commit){

con.commit();}else{

con.rollBack();}

}catch (SQLException ex){

//X l li}finally{

con.close();}

Sdng Transaction

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String sql1= insert/delete/update . . .String sql2= insert/delete/update . . .Connection con =DriverManager.getConnection( cs, info);try{

con.setAutoCommit(false);

Statement statement1= con.createStatement();Statement statement2= con.createStatement();

Savepoint save1 = con.setSavepoint();statement1.executeUpdate(sql1);statement2.executeUpdate(sql2);if(iukin commit){

con.commit();}else{

con.rollBack(save1);}

}catch (SQLException ex){//X l li

}finally{con.close();

}

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CallableStatement - X l Store Procedure

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Store Procedure - MySQL

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DELIMITER$$

CREATE PROCEDURE spThemDanhMuc (in tenDanhMuc VARCHAR (45)

)BEGIN

INSERT INTO DANHMUC(TENDANHMUC)VALUES (tenDanhMuc);

SELECT LAST_INSERT_ID();END

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String tenDanhMuc = "C++";

CallableStatement statement =connection.prepareCall("{call spThemDanhMuc(?)}");

statement.setString(1, tenDanhMuc);

statement.execute();ResultSet rs = statement.getResultSet();

if (rs.next()) {int maDanhMuc = rs.getInt(1);

System.out.println(maDanhMuc);}

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Store Procedure - MySQL

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DELIMITER$$CREATE PROCEDURE spThemDanhMuc ( intenDanhMuc VARCHAR (45),

out maDanhMuc int)

BEGININSERT INTO DANHMUC(TENDANHMUC) VALUES (tenDanhMuc);SET maDanhMuc = LAST_INSERT_ID();

END

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String tenDanhMuc = "C++";

CallableStatement statement =connection.prepareCall("{call spThemDanhMuc (?, ?)}");

statement.setString(1, tenDanhMuc);statement.registerOutParameter(2,Types.INTEGER);

statement.execute();int maDanhMuc = statement.getInt(2);

System.out.println(maDanhMuc);

TI LIU THAM KHO

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Ti liu tham kho Nguyn Hong Anh, Tp slide bi ging v video mn

Lp Trnh Java, H KHTN, 2010

http://download.oracle.com/javase/tutorial/jdbc/basics/

, 2011

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HI V P

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