Question

我有一个带有以下输出的txt文件：

"CN=COUD111255,OU=Workstations,OU=Mis,OU=Accounts,DC=FLHOSP,DC=NET"

我要做的是阅读COUD111255部件并将其分配给java变量。我将ldap分配给sCurrentLine，但是我得到了一个零点异常。任何建议。

try (BufferedReader br = new BufferedReader(new FileReader("resultofbatch.txt")))
            {


                final Pattern PATTERN = Pattern.compile("CN=([^,]+).*");
                try {
                    while ((sCurrentLine = br.readLine()) != null) {
                        //Write the function you want to do, here.
                        String[] tokens = PATTERN.split(","); //This will return you a array, containing the string array splitted by what you write inside it.
                        //should be in your case the split, since they are seperated by ","

                    }
                     System.out.println(sCurrentLine);
                } catch (IOException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                } catch (IOException e2) {
                    // TODO Auto-generated catch block
                    e2.printStackTrace();
                }

        }
    });

Answer 1

您只需逐行读取文件中的数据，并将该行分配给变量str。请参阅以下链接： How to read a large text file line by line using Java?

Answer 2

要从.txt中读取，请使用BufferedReader。要创建一个，请写：

BufferedReader br = new BufferedReader(new FileReader("testing.txt"));

testing.txt是您正在阅读的txt的名称，必须在您的java文件中。初始化后，您必须继续：

while ((CurrentLine = br.readLine()) != null) {
                //Write the function you want to do, here.
                String[] tokens = CurrentLine.split(","); //This will return you a array, containing the string array splitted by what you write inside it.
                //should be in your case the split, since they are seperated by ","
            }

你有令牌数组= [CN = COUD111255，OU =工作站OU = Mis，OU =账户，DC = FLHOSP，DC = NET]。所以，现在取数组的第0个元素并使用它。你现在得到了CN = COUD111255！离开这里不要给出完整的代码。

希望有所帮助！

Answer 3

您的代码几乎是正确的。您正在将此字符串写入标准输出 - 用于什么？如果我理解你，你需要的只是这个：

private static final Pattern PATTERN = Pattern.compile("CN=([^,]+).*");

public static String solve(String str) {
    Matcher matcher = PATTERN.matcher(str);
    if (matcher.matches()) {
        return matcher.group(1);
    } else {
        throw new IllegalArgumentException("Wrong string " + str);
    }
}

此次电话

solve("CN=COUD111255,OU=Workstations,OU=Mis,OU=Accounts,DC=FLHOSP,DC=NET")

给了我“COUD111255”作为答案。

将部分txt文件分配给java变量

3 个答案: