| 首先在项目引入JAR：sqlite-jdbc-(VERSION).jar
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| 连接到数据库（Connecting To Database） |
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| 下面的代码演示了如何连接到一个现有的数据库。如果数据库不存在，那么它会被自动创建，最终返回一个数据库连接实例。 |
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public class SQLiteJDBC {
public static void main(String args[]) {
Connection c = null;
try {
Class.forName("org.sqlite.JDBC");
c = DriverManager.getConnection("jdbc:sqlite:test.db");
c.close();
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
System.exit(0);
}
System.out.println("Opened database successfully");
}
} |
| 创建一个表（Create a Table） |
| 下面的Java程序用于在先前创建的数据库中创建一个表： |
public class SQLiteJDBC {
public static void main(String args[]) {
Connection c = null;
Statement stmt = null;
try {
Class.forName("org.sqlite.JDBC");
c = DriverManager.getConnection("jdbc:sqlite:test.db");
System.out.println("Opened database successfully");
stmt = c.createStatement();
String sql = "CREATE TABLE COMPANY "
+ "(ID INT PRIMARY KEY NOT NULL ,"
+ " NAME TEXT NOT NULL ,"
+ " AGE INT NOT NULL ,"
+ " ADDRESS CHAR(50) ,"
+ " SALARY REAL) ";
stmt.executeUpdate(sql);
stmt.close();
c.close();
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
System.exit(0);
}
System.out.println("Table created successfully");
}
} |
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| 插入操作（INSERT Operation） |
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| 下面的Java程序演示了如何在COMPANY表中插入一些记录： |
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public class SQLiteJDBC {
public static void main(String args[]) {
Connection c = null;
Statement stmt = null;
try {
Class.forName("org.sqlite.JDBC");
c = DriverManager.getConnection("jdbc:sqlite:test.db");
c.setAutoCommit(false);
System.out.println("Opened database successfully");
stmt = c.createStatement();
String sql = "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) "
+ "VALUES (1, 'Paul', 32, 'California', 20000.00 );";
stmt.executeUpdate(sql);
sql = "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) "
+ "VALUES (2, 'Allen', 25, 'Texas', 15000.00 );";
stmt.executeUpdate(sql);
sql = "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) "
+ "VALUES (3, 'Teddy', 23, 'Norway', 20000.00 );";
stmt.executeUpdate(sql);
sql = "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) "
+ "VALUES (4, 'Mark', 25, 'Rich-Mond ', 65000.00 );";
stmt.executeUpdate(sql);
stmt.close();
c.commit();
c.close();
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
System.exit(0);
}
System.out.println("Records created successfully");
}
}
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| 更新操作（UPDATE Operation） |
| 下面的Java代码演示了如何使用UPDATE语句来从本公司表更新任何记录，然后获取并显示更新的记录： |
public class SQLiteJDBC {
public static void main(String args[]) {
Connection c = null;
Statement stmt = null;
try {
Class.forName("org.sqlite.JDBC");
c = DriverManager.getConnection("jdbc:sqlite:test.db");
c.setAutoCommit(false);
System.out.println("Opened database successfully");
stmt = c.createStatement();
String sql = "UPDATE COMPANY set SALARY = 25000.00 where ID=1;";
stmt.executeUpdate(sql);
c.commit();
ResultSet rs = stmt.executeQuery("SELECT * FROM COMPANY;");
while (rs.next()) {
int id = rs.getInt("id");
String name = rs.getString("name");
int age = rs.getInt("age");
String address = rs.getString("address");
float salary = rs.getFloat("salary");
System.out.println("ID = " + id);
System.out.println("NAME = " + name);
System.out.println("AGE = " + age);
System.out.println("ADDRESS = " + address);
System.out.println("SALARY = " + salary);
System.out.println();
}
rs.close();
stmt.close();
c.close();
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
System.exit(0);
}
System.out.println("Operation done successfully");
}
}
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| 编译并运行后，在控制台的输出： |
| Opened database successfully ID = 1 NAME = Paul AGE = 32 ADDRESS = California SALARY = 25000.0
ID = 2 NAME = Allen AGE = 25 ADDRESS = Texas SALARY = 15000.0
ID = 3 NAME = Teddy AGE = 23 ADDRESS = Norway SALARY = 20000.0
ID = 4 NAME = Mark AGE = 25 ADDRESS = Rich-Mond SALARY = 65000.0
Operation done successfully |
|
|
| 删除操作（DELETE Operation） |
| 下面的Java代码显示了如何使用DELETE语句删除任何记录，然后获取并显示公司表中未被删除的记录： |
public class SQLiteJDBC {
public static void main(String args[]) {
Connection c = null;
Statement stmt = null;
try {
Class.forName("org.sqlite.JDBC");
c = DriverManager.getConnection("jdbc:sqlite:test.db");
c.setAutoCommit(false);
System.out.println("Opened database successfully");
stmt = c.createStatement();
String sql = "DELETE from COMPANY where ID=2;";
stmt.executeUpdate(sql);
c.commit();
ResultSet rs = stmt.executeQuery("SELECT * FROM COMPANY;");
while (rs.next()) {
int id = rs.getInt("id");
String name = rs.getString("name");
int age = rs.getInt("age");
String address = rs.getString("address");
float salary = rs.getFloat("salary");
System.out.println("ID = " + id);
System.out.println("NAME = " + name);
System.out.println("AGE = " + age);
System.out.println("ADDRESS = " + address);
System.out.println("SALARY = " + salary);
System.out.println();
}
rs.close();
stmt.close();
c.close();
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
System.exit(0);
}
System.out.println("Operation done successfully");
}
}
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| 编译并运行后，在控制台的输出： |
| Opened database successfully ID = 1 NAME = Paul AGE = 32 ADDRESS = California SALARY = 25000.0
ID = 3 NAME = Teddy AGE = 23 ADDRESS = Norway SALARY = 20000.0
ID = 4 NAME = Mark AGE = 25 ADDRESS = Rich-Mond SALARY = 65000.0
Operation done successfully |