The document discusses the Java Database Connectivity (JDBC) framework. It describes the 4 types of JDBC drivers: Type 1 (JDBC-ODBC bridge), Type 2 (part Java and part native code), Type 3 (middleware), and Type 4 (pure Java). It outlines the basic steps to connect to a database using JDBC, including finding a suitable driver, registering the driver, establishing a physical connection, creating a statement to execute queries, executing queries, and closing resources. It also discusses how to store the results of a query using the ResultSet interface.

1. JDBC
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Praveen Kumar Chandaliya (SCJP,SCWCD)

2. WHY JDBC
P R A VE E N K U M A R C H A N D A L I YA ,
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package : java.sql.*

3. DESIGN OF JDBC
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4. JDBC DRIVER TYPE
 Type-1(JDBC-ODBCbridgedriver)
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5. TYPE 2(PARTLY JAVA AND PARTLY NATIVE CODE
DRIVER)
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6. TYPE-3(MIDDLEWARE)
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7. TYPE 4(PURE JAVA DRIVER)
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8. JDBC STEPS
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1. Finding the suitable driver (Type-4 Mysql)
String driver= “com.mysql.jdbc.Driver”;
2. Registration of suitable driver(Load driver)
try
{
Class.forName(driver);
}
catch(ClassNotFoundException ex)
{
}

9. P R A VE E N K U M A R C H A N D A L I YA ,
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3. Physical Connection Establish between java Program
and My sql Data Base
Database url specific parameters as follows:
protocol : jdbc , sub protocal : mysql
Port numbers : 3306 ,Database names : jecrcdb
String url = “jdbc:mysql://ipaddress:3306/jecrcdb”;
String user=“username”; //root
String password=“password”; //root
try
{
Connection con = DriverManager.getConnection(url,user,password);
}
catch(SQLException ex)
{ }

10. 4. Create Agent Who transfer sql Query from java program to
data base using connection
try
{ Statement stmt = con.createStatement();
}
catch(SQLException ex)
{ ex.printStackTrace(); }
5. Trigger Sql Query at Data Base side using statement
i) DDL (create,alter,drop)
stmt.execute(“create table student (sid int,sname varchar(30),email
varchar(30),branch varchar(20))”);
ii) DML (insert,delete,update)
stmt.executeUpdate(“insert into student
values(22,’praveen’,’pc@gmail.com’,’CSE’)”);
iii) DQL :(select)
ResultSet rs = stmt.executeQuery(“select *from student”)
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11. 6. Close all resources in finally block
finally
{ try
{ if(stmt!=null) //Child Close First
{ stmt.close();
stmt =null;
}
}
catch(SQLException ex)
{}
try
{ if(con!=null) //Parent Close last
{ con.close();
con =null;
}
}
catch(SQLException ex)
{}
}
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12. STORE RESULT
 How to store result of the query
 ResultSet Interface
 Example
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Statementst = conn.createStatement();
. . .
ResultSetrs = st.executeQuery(“SELECT* FROM student”)
while(rs.next())
{
Look at a rowof the result set
}
Loop of Analyzing

13. RESULTSET
 Methods of ResultSetclass as follows:-
 boolean next()
 XXXX getXXXX(int columnNum);
 XXXX getXXXX(String columnLabel);
[XXXX -> int , double,String Date etc]
P R AVE E N KUM AR C HAN D ALIYA, S C J P, SCW CD
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14. CLASS DIAGRAM OF CRUD OPEARTION
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Student
- sid : int
-sname : String
-email : String
-address: String
getXXX()
setXXX()
toString()
StudentDao
addStudent(Student st) : void
getAllStudent() : List
deleteStudent(int sid) : void
updateStudent(Student st):void
student student
StudentDataManager
Static {}
main() : void
DbUtility
static getConnection():Connection

15. P R A VE E N K U M A R C H A N D A L I YA ,
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Perform Insert,Delete,Update,Select operation