我想执行以下操作:
(从 PROCESSING DB 的提取行中转移到 PRESENTATION DB 的行)
PreparedStatement stmt;
Statement st;
Connection conn = ConnectionManager.getInstance().getConnection(ConnectionManager.PRESENTATION_DB);
try {
conn.setAutoCommit(false);
stmt = conn.prepareStatement(
"insert into customer (name,category,age) values (?,?,?)");
stmt.clearParameters();
stmt.setString(1,"name2");
stmt.setString(2,"cat2");
stmt.setInt(3,25);
stmt.addBatch();
stmt.clearParameters();
stmt.setString(1,"name3");
stmt.setString(2,"cat3");
stmt.setInt(3,25);
stmt.addBatch();
stmt.clearParameters();
stmt.setString(1,"name4");
stmt.setString(2,"cat2");
stmt.setInt(3,25);
stmt.addBatch();
stmt.clearParameters();
stmt.setString(1,"name4");
stmt.setString(2,"cat2");
//stmt.setInt(3,25);
//this is parameter with false input
stmt.setString(3,"null");
stmt.addBatch();
stmt.clearParameters();
stmt.setString(1,"name5");
stmt.setString(2,"cat5");
stmt.setInt(3,25);
stmt.addBatch();
stmt.clearParameters();
int [] updateCounts = stmt.executeBatch();
conn.commit();
conn.setAutoCommit(true);
stmt.close();
conn.close();
}
catch(BatchUpdateException b) {
System.err.println("-----BatchUpdateException-----");
System.err.println("SQLState: " + b.getSQLState());
System.err.println("Message: " + b.getMessage());
System.err.println("Vendor: " + b.getErrorCode());
System.err.print("Update counts: ");
int [] updateCounts = b.getUpdateCounts();
for (int i = 0; i < updateCounts.length; i++) {
System.err.print(updateCounts[i] + " ");
}
System.err.println("");
}
catch (Exception e) {
e.printStackTrace();
}
如何识别导致异常的行能够在没有此特定行的情况下重新执行批处理?(通过更新行的字段 hasError)。
目前我没有批量保存对象,因此如果它导致错误,我可以标记该行并跳过该行并继续处理(即保存/传输和删除)另一行。
谢谢!
更新:
好的,我使用以下代码来跟踪行(如果任何行导致错误):
public static void processUpdateCounts(int[] updateCounts) {
for (int i=0; i<updateCounts.length; i++) {
if (updateCounts[i] >= 0) {
// Successfully executed; the number represents number of affected rows
logger.info("Successfully executed: number of affected rows: "+updateCounts[i]);
} else if (updateCounts[i] == Statement.SUCCESS_NO_INFO) {
// Successfully executed; number of affected rows not available
logger.info("Successfully executed: number of affected rows not available: "+updateCounts[i]);
} else if (updateCounts[i] == Statement.EXECUTE_FAILED) {
logger.info("Failed to execute: "+updateCounts[i]);
// Failed to execute
}
}
}
并添加了一行:
processUpdateCounts(updateCounts);
所以我可以看到有或没有任何错误的更改,但似乎 BatchUpdateException 不起作用?