java代码 模仿周立功上位机的读取DBC的方式

以下是一个使用j1939dbc库读取DBC文件的示例代码：

import java.io.File;
import java.io.IOException;
import java.util.List;
import j1939dbc.DBC;
import j1939dbc.Signal;
import j1939dbc.SignalType;

public class DBCReader {
    public static void main(String[] args) {
        // 读取DBC文件
        File dbcFile = new File("example.dbc");
        DBC dbc = null;
        try {
            dbc = new DBC(dbcFile);
        } catch (IOException e) {
            e.printStackTrace();
        }
        
        // 获取所有信号
        List<Signal> signals = dbc.getSignals();
        
        // 输出信号信息
        for (Signal signal : signals) {
            System.out.println("Name: " + signal.getName());
            System.out.println("Offset: " + signal.getOffset());
            System.out.println("Length: " + signal.getLength());
            System.out.println("Factor: " + signal.getFactor());
            System.out.println("Offset: " + signal.getOffset());
            System.out.println("Minimum: " + signal.getMinimum());
            System.out.println("Maximum: " + signal.getMaximum());
            System.out.println("Unit: " + signal.getUnit());
            System.out.println("Type: " + signal.getType());
            System.out.println("Comment: " + signal.getComment());
            System.out.println();
        }
        
        // 获取指定信号
        Signal speedSignal = dbc.getSignalByName("Speed");
        
        // 输出指定信号的信息
        System.out.println("Name: " + speedSignal.getName());
        System.out.println("Offset: " + speedSignal.getOffset());
        System.out.println("Length: " + speedSignal.getLength());
        System.out.println("Factor: " + speedSignal.getFactor());
        System.out.println("Offset: " + speedSignal.getOffset());
        System.out.println("Minimum: " + speedSignal.getMinimum());
        System.out.println("Maximum: " + speedSignal.getMaximum());
        System.out.println("Unit: " + speedSignal.getUnit());
        System.out.println("Type: " + speedSignal.getType());
        System.out.println("Comment: " + speedSignal.getComment());
        
        // 获取指定信号的类型
        SignalType speedSignalType = dbc.getSignalType(speedSignal);
        System.out.println("Signal type: " + speedSignalType);
    }
}

这个示例代码使用了j1939dbc库来读取DBC文件，并输出了所有信号的信息，以及指定信号的信息和类型。你可以根据自己的需求修改代码来读取和使用DBC文件中的信号信息。