Java ?????? ?? ?? ???: JDBC ???: SSL/TLS ??? ???? ??? ?? ??? ?????. ?? ?: ??? ?????, ??? ??? ????, ??? ?????. ??? ??: ??? ??? ???? ?? ??? ???? ??? ??????? ?????. SQL ?? ??: ?????? ??? ?? ??? ??? ???? ???? ??? ?????.
Java ?????? ?? ?? ???
Java ???????? ??????? ??? ? ??? ???? ?? ?????. ? ????? ? ??? ???? ??? ?????.
1. JDBC? ??? ???
JDBC? ??????? ?? ???? ?? Java? API???. ??? ??? ?? ??? ??? ?????.
// 使用 SSL 連接
DriverManager.getConnection("jdbc:postgresql://localhost:5432/test?ssl=true", "user", "password");
// 使用 TLS 連接
DriverManager.getConnection("jdbc:postgresql://localhost:5432/test?sslMode=require", "user", "password");2. ?? ? ??
?? ?? ??????? ??? ?? ??? ?? ? ?? ?? ??? ?????? ?? ?????. ??? ??? ????.
- ?? ??. ??, ? ?? ??? ?? ???? ??
- ?? ??, ?????? ???? ??? ?? ??
import org.apache.commons.dbcp2.BasicDataSource; import org.apache.commons.dbcp2.BasicDataSourceFactory; ... // 配置連接池 BasicDataSource dataSource = BasicDataSourceFactory.createDataSource(properties); // 獲取連接 Connection connection = dataSource.getConnection();
3. ??? ?? ??
?????? ??? ?? ??? ?? ??????? ??? ?? ?? ???? ?? ?? ??? ??? ???? ? ??? ?? ?? ??? ??? ??? ?????.
4. SQL ?? ??
SQL ??? ???? ???? SQL ?? ??????? ????? ???? ?????. ??? ?? ?? ??? ??? ? ????.
- ?????? ?? ??
- ?? ?? ?????
- ??? ?? ??? ??
?? ??
??? JDBC ??? ? ?? ??? ???? ??? ???? ?? ?????.
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.sql.Connection;
import java.sql.DriverManager;
...
// 從 properties 文件中讀取數(shù)據(jù)庫加密密鑰
String password = new String(Cipher.getInstance("AES").decrypt(Base64.getDecoder().decode(properties.getProperty("password")))));
// 創(chuàng)建連接池
BasicDataSource dataSource = new BasicDataSource();
dataSource.setUrl("jdbc:postgresql://localhost:5432/test?ssl=true");
dataSource.setUsername("user");
dataSource.setPassword(password);
// 獲取連接
Connection connection = dataSource.getConnection();??? ?? ??? ??? Java ?????? ??? ??? ?? ???? ?? ??? ? ??? ??? ??? ? ????.
? ??? Java ?????? ??? ?? ??? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!
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vscode settings.json ??
Aug 01, 2025 am 06:12 AM
settings.json ??? ??? ?? ?? ?? ?? ?? ??? ??? VSCODE ??? ??? ???? ? ?????. 1. ??? ?? ?? : Windows? C : \ Users \\ AppData \ Roaming \ Code \ User \ Settings.json, MacOS IS /users//library/applicationsupport/code/user/settings.json, linux? /home//.config/code/user/settings.json; 2. Workspace ?? ?? : .vscode/settings project root ????
JDBC? Java? ??? ???? ??? ??????
Aug 02, 2025 pm 12:29 PM
JDBC ????? ???? ????? ?? ?? ?? ??? ?? ?? ??? ?? ? ?? ??? ?? ?? ?? ??? ???????. 1. ????? ????? Conn.SetAutoCommit (False)?? ??????. 2. ??? ? ????? ?? ?? SQL ??? ?????. 3. ?? ??? ??? ?? Conn.commit ()?? ???? ??? ???? ???? ?? ??? ???? Conn.Rollback ()?? ??????. ???, ? ??? ???? ????, ??? ???? ????, ?? ??? ??? ?? ??? ??? ???? ? ???????. ?? ?? ?? ???? ????? ??? ???? ?? ?? ???? ???? ??? ????? ?? ??? ??? ? ?? ???? ?? ????.
???? ??? ?? Java? ??? ?? ??? ?
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??? (DI) ISADESIGNPATTORNWHEREWHEDROUDIVESTESTESTETESTERGROWCONSTRUCTOR, 2.SPRINGFRAMEWWERTHUSENONTATIONS? ??@autowiredWithjava ?? CONCUTTATIONS LIKERWITHCONSTRUCTOR, ORFIELDINGESS.2.SPRINGFRAMEWWERTHUSENNOTATIONS
JVM (Java Virtual Machine) ?? ??
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thejvmenablesjava? "WriteOnce, Runynywhere"??? ?? excodecodethroughfourmaincomponents : 1. theclassloadersubsystemloads, ??, ? intinitializes.classfilesusingbootsprap, extension, andapplicationclassloaders, ensuringsecureandlazyclasloa
Java? ??? ?? ??? ??????
Aug 02, 2025 am 02:38 AM
?? ?? ? ?? ???? ???? ?? Java.Time ???? ???? ??????. 2. LocalDate, LocalDateTime ? LocalTime? ?? ?? ??? ??? ?????. 3. () ???? ???? ?? ??? ??? ????. 4. ???/???? ??? ???? ??? ????? ??? ??????. 5. ZonedDateTime ? Zoneid? ???? ???? ??????. 6. DateTimeFormatter? ?? ?? ? ?? ?? ?? ???; 7. ??? ?? ?? ?? ??? ????? ?? ??????. ?? Java? ?? ??? ???? ??? ??? ???? Java.Timeapi ??? ?? ??? ???????.
Google Chrome? ?? ??? ? ? ????
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chromecanopenlocalfiles likehtmlandpdfsbyusing "OpenFile"OrdraggingTheMintoTheBrowser; ensuretHeadDressStartSwithFile : ///; 2.SecurityRestrictionSblockajax, LocalStorage, andcross-folderaccessonfile : //; usealocalsertpython-mhtpython-mhtpython-mhtppy
???? ?? ? ??? ??
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NetworkPortSandfirewallsworkTogetToenableCommunication whileensuringsecurity.1.networkportSarevirtualendpointsnumbered0–65535, Withwell-nownports like80 (http), 443 (https), 22 (ssh) ? 25 (smtp) ?? (specservices
Apache? Let 's Encrypt SSL ???? ???? ??? ??????
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CertBot ? Apache ????? ??????. 2. ???? ?? ??? ??? ????? certbot? ??????. 3. ????? HTTP?? HTTP? ?? ????? ?????. 4. ?? ??? ???? ?? ? ???? ?????. 5. ??? ???? Apache? ?? ? ?? ??? ??????. ???? ????? ???? ??? ???? ?????. ?? ????? ???? ?? HTTPS ???? ?? ? ? ????.
