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Transaction Management
Last Updated : 26 May, 2026
title: Transaction Management in JDBC
JDBC44 words4 headingsExamples included
title: Transaction Management in JDBC description: JDBC mein transactions handle karna
Group of operations — ya sab hoon, ya koi nahi (Atomicity).
Default: Auto-commit ON
Har statement automatically commit hota hai. Transaction ke liye off karo.
Transaction Example
java exampleWoHoTech
Connection conn = null;
try {
conn = DBConfig.getConnection();
conn.setAutoCommit(false); // Transaction start
// Operation 1: Withdraw from account A
PreparedStatement ps1 = conn.prepareStatement(
"UPDATE accounts SET balance = balance - ? WHERE id = ?");
ps1.setDouble(1, 1000);
ps1.setInt(2, 1);
ps1.executeUpdate();
// Operation 2: Deposit to account B
PreparedStatement ps2 = conn.prepareStatement(
"UPDATE accounts SET balance = balance + ? WHERE id = ?");
ps2.setDouble(1, 1000);
ps2.setInt(2, 2);
ps2.executeUpdate();
conn.commit(); // Dono operation successful — commit
System.out.println("Transfer successful!");
} catch (SQLException e) {
if (conn != null) {
try {
conn.rollback(); // Koi bhi fail — rollback sab
System.out.println("Transaction rolled back");
} catch (SQLException ex) { ex.printStackTrace(); }
}
e.printStackTrace();
} finally {
if (conn != null) conn.setAutoCommit(true); // Reset
}Savepoints
java exampleWoHoTech
conn.setAutoCommit(false);
Savepoint sp1 = conn.setSavepoint("SP1");
// Some operations...
Savepoint sp2 = conn.setSavepoint("SP2");
// More operations...
conn.rollback(sp2); // SP2 tak rollback (SP1 ke baad wali operations undo)
conn.commit();
conn.releaseSavepoint(sp1);Isolation Levels
java exampleWoHoTech
conn.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED); // Most common
// READ_UNCOMMITTED, READ_COMMITTED, REPEATABLE_READ, SERIALIZABLEExam Focus
Revise definitions, diagrams, examples, and short-answer points for Transaction Management.
Interview Use
Prepare one clear explanation, one practical example, and one common mistake for this Java topic.
Search Terms
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