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StreamTokenizer在遇到斜杠时停止

tokenize java

mrfr · 技术社区 · 7 年前

考虑这个程序,可以在教程点上找到(其中 br 是BufferedReader对象):

boolean eof = false;
// Parse incoming request
StreamTokenizer st = new StreamTokenizer(br);
do {
    int token = st.nextToken();

    switch (token) {
        case StreamTokenizer.TT_EOF:
            System.out.println("End of File encountered.");
            eof = true;
            break;

        case StreamTokenizer.TT_EOL:
            System.out.println("End of Line encountered.");
            break;

        case StreamTokenizer.TT_WORD:
            System.out.println("Word: " + st.sval);
            break;

        case StreamTokenizer.TT_NUMBER:
            System.out.println("Number: " + st.nval);
            break;

        default:
            System.out.println((char) token + " encountered.");

            if (token == '!') {
                eof = true;
            }
    }
    } while (!eof);

此代码段适用于以下字符串 "Hello this is a string" 打印位置:

Word: Hello

Word: this

Word: is

Word: a

Word: string

但如果我这样做: "Hello /this is a string" 它只会打印出来

字:你好

为什么会这样,我该如何解决?

1 回复 | 直到 7 年前

Erik Pearson 7 年前

正斜杠/在StreamTokenizer类中不被视为普通字符。您可以使用ordinaryChar方法更改该默认行为:

import java.io.*;

public class StreamTokenizerSO {
    public static void main(String[] args) throws IOException {
        String aString = "Hello /this is a string";
        Reader inputString = new StringReader(aString);
        BufferedReader br = new BufferedReader(inputString);

        boolean eof = false;
// Parse incoming request
        StreamTokenizer st = new StreamTokenizer(br);

        st.ordinaryChar('/');

        do {
            int token = st.nextToken();

            switch (token) {
                case StreamTokenizer.TT_EOF:
                    System.out.println("End of File encountered.");
                    eof = true;
                    break;

                case StreamTokenizer.TT_EOL:
                    System.out.println("End of Line encountered.");
                    break;

                case StreamTokenizer.TT_WORD:
                    System.out.println("Word: " + st.sval);
                    break;

                case StreamTokenizer.TT_NUMBER:
                    System.out.println("Number: " + st.nval);
                    break;

                default:
                    System.out.println((char) token + " encountered.");

                    if (token == '!') {
                        eof = true;
                    }
            }
        } while (!eof);
    }
}

通过google“StreamTokenizer正斜杠”找到此链接,并获得以下旧链接: http://www.dickbaldwin.com/java/Java061.htm