2

我正在创建一个程序，它读取文本文件并将其中的信息设置为三叉树中的节点。我已经创建了 addNode 方法，但现在我正在研究读取导入的纺织品并提取正确信息、将其设置到节点并构建树的方法。一个文本文件以下列格式给出，用于创建自动帮助服务系统。

每个节点都有三个 String 类型的变量：label、prompt 和 message

root                                          //label   
Root Node                                     //prompt   
What Model is the Washing Machine?            //message
root 3           //root signifies the next node to branch, and 3 is the # children
1                                             //label
WM200                                         //prompt
What is the problem?                          //message
2                                             //etc.
WM300                                       
What is the problem?                       
3                                          
WM400                                       
What is the problem?                        
1 3                                         
1-1                                         
No Water.                                   
Is the hose attached?                       
1-2
Water too hot.
Turn the temperature knob to warm.
1-3
Water too cold.
Turn the temperature knob to warm.
1-1 3
1-1-1
Yes, but the hose is broken.
Purchase a new hose.
1-1-2
No, didn't know there was a hose.
Plug it in the back.
1-1-3
Yes, but still no water.
Make sure the water valve is turned on.

每次有完整的信息量（标签、提示、消息）时，我需要将节点添加到树的正确位置（在父节点下，左对齐）

这是我为该方法提供的代码。（假设 addNode 方法正常工作并且从左到右添加节点）

addNode 方法有 4 个参数（标签、提示、消息、父标签）

parentLabel 是放置孩子的地方。Ex/root 是上面示例代码第 4 行中的父标签。

while(line != null) {               //while there is still content in the file
    String label = line;            //set label to first line
    line = reader.readLine();
    String prompt = line;           //set prompt to second line
    line = reader.readLine();
    String message = line;          //set message to third line
    line = reader.readLine();

    String parentLabel = "";;
    String numChildren = "";
    if(line.contains(" ")) {
        parentLabel = line.substring(0, line.indexOf(" ")); //parent label up to first space 
        numChildren = line.substring(line.indexOf(" "), line.indexOf("\n")); //number of children from space to end 
    } else
        numChildren = line;     //if no space, line is number of children

    tree.addNode(label, prompt, message, null); //add that node (parentLabel would be null becuase first node)

    for(int i = 0; i < Integer.parseInt(numChildren); i++) {
        line = reader.readLine();
        label = line;           //set label to first line
        line = reader.readLine();
        prompt = line;          //set prompt to second line
        line = reader.readLine();
        message = line;         //set message to third line

        tree.addNode(label, prompt, message, parentLabel); //add node
    }

我认为我的代码很接近，但它并不总是适用于给定的模式。文本文件将始终采用该格式，但是标签不必采用任何特定格式，并且它们不一定由数字和破折号组成。

对此的任何帮助将不胜感激。谢谢

4

0 回答 0