我正在尝试学习 OSGi,我做了一个简单的项目,它将在 Sqlite DB 中创建一个表。我在构建路径中添加了“sqlite-jdbc-3.7.2.jar”。但是当我运行该项目时,它会显示“ClassNotFoundException”。
我使用带有 BndTools 的 Eclipse IDE。
我搜索了其他帖子,有些人说将 jar 添加为不同的捆绑包,然后将其导出。我尝试过这个。在工作区中,我选择了 Import->Plugins and Fragments -> Select The Directory。但它没有列出 Jar(适用于其他 Jar 但不检测 sqlite-jdbc-3.7.2.jar)。
我已经完成了如下操作,
se.sample.sqlitedbconn.ConnActivator.java
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import se.sample.connproperties.CreateTable;
import aQute.bnd.annotation.component.*;
@Component
public class ConnActivator implements BundleActivator {
Connection connection;
Statement statement;
@Activate
public void start(BundleContext context) throws Exception {
System.out.println("Starting");
try {
Class.forName("org.sqlite.JDBC");
connection = DriverManager.getConnection("jdbc:sqlite://home/raj/Desktop/EclipseProjectsWorkspace/ZWave.db");
} catch (Exception ex) {
System.err.println(ex.getClass().getName()+": "+ex.getMessage());
}
System.out.println("Connection To Database Successful");
CreateTable createTable = new CreateTable();
statement = connection.createStatement();
boolean isTableCreated = createTable.createANewTable(connection,statement);
if(isTableCreated){
System.out.println("Table Created Successfully!");
}else{
System.out.println("Table Creation Failed!");
}
statement.close();
}
@Deactivate
public void stop(BundleContext context) throws Exception {
System.out.println("Stopping");
if(connection != null){
connection.close();
}
System.out.println("Database Connection Closed!");
}
}
se.sample.connproperties.CreateTable.java
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
public class CreateTable {
public boolean createANewTable(Connection connection, Statement statement) {
String sql = "CREATE TABLE Product " +
"(ProductId INT PRIMARY KEY NOT NULL,"+
"ProductName TEXT NOT NULL,"+
"ProductPrice REAL);";
try {
statement.executeUpdate(sql);
} catch (SQLException e) {
System.err.println(e.getClass().getName()+": "+e.getMessage());
return false;
}
return true;
}
}
当我运行它时,我收到以下错误:
Starting
Connection To Database Successful
java.lang.ClassNotFoundException: org.sqlite.JDBC not found by se.sample.sqlitedbconn [8]
! Failed to start bundle se.sample.sqlitedbconn-0.0.0.201503241305, exception activator error null from: se.sample.sqlitedbconn.ConnActivator:start#34
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请帮助我:)