logback日志自定义DBAppender

在Logback中自定义DBAppender，需要继承ch.qos.logback.core.db.DBAppenderBase类，并实现必要的方法。以下是一个简单的自定义DBAppender的例子：

import ch.qos.logback.core.db.DBAppenderBase;
import ch.qos.logback.core.db.JDBCUtil;
import ch.qos.logback.core.spi.ContextAwareBase;
import ch.qos.logback.core.spi.LifeCycle;
import java.sql.Connection;
import java.sql.PreparedStatement;
 
public class CustomDBAppender extends ContextAwareBase implements DBAppenderBase<Object> {
 
    private String insertSQL;
 
    @Override
    public void start() {
        if (this.insertSQL == null) {
            addError("No insert SQL defined for CustomDBAppender.");
            return;
        }
 
        if (this.getConnectionSource() == null) {
            addError("No connection source configured for CustomDBAppender.");
            return;
        }
 
        super.start();
    }
 
    @Override
    public void stop() {
        // Clean up resources if needed
        super.stop();
    }
 
    @Override
    public void setName(String name) {
        // Set the name of the appender
        super.setName(name);
    }
 
    @Override
    public void doAppend(Object event) {
        // Implement the logic to insert the event into the database
        Connection con = null;
        PreparedStatement pstmt = null;
        try {
            con = getConnection();
            pstmt = con.prepareStatement(insertSQL);
            // Bind the event data to the SQL statement
            // ...
            pstmt.executeUpdate();
        } catch (Exception e) {
            addError("Failed to insert event into database.", e);
        } finally {
            JDBCUtil.closeQuietly(pstmt);
            JDBCUtil.closeQuietly(con);
        }
    }
 
    // Getters and setters
    public String getInsertSQL() {
        return insertSQL;
    }
 
    public void setInsertSQL(String insertSQL) {
        this.insertSQL = insertSQL;
    }
}

在配置文件中使用自定义的DBAppender：

<configuration>
 
  <appender name="DB" class="com.yourcompany.CustomDBAppender">
    <insertSQL>INSERT INTO logging (message) VALUES (?)</insertSQL>
    <!-- 其他数据源配