BufferedReader 不读取整个文本文件

Question

                String str = "";
            try {

                BufferedReader br = new BufferedReader(new FileReader(file.getAbsolutePath()));
                while (br.readLine() != null) {
                    str += br.readLine();
                }
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            String replace = str.replace("HTTP Request: ", "")
                    .replace("Resource URL: ","")
                    .replace("Attribute\t\tDescription", "| Attribute | Type | Description |<P>|----|----|<P>")
                    .replace("Data Type | Max Length | Requirement |", "")
                    .replace("N/A", "Object")
                    .replace("String", "| String")
                    .replace("255 |", "")
                    .replace("Required", "**Required**")
                    .replace("Optional", "**Optional**")
                    .replace("Request Example <P>", "")
                    .replace("Response Example <P>", "Nothing");

            PrintWriter pw = null;

BufferedReader 忽略前 3 行，reads/converts 其余的。不确定是什么问题。我尝试过其他 Whosebug 解决方案，但 none 似乎有效！

Answer 1

问题在这里：

while (br.readLine() != null)

你检查 br.readLine() 是否不为空的时间你已经阅读了 line.To 解决这个问题你可以尝试以下方法：

String line = br.readLine();
while (line != null){
    str +=line;
    line = br.readLine();
}

Answer 2

theVoid 已经告诉了是什么问题，并给出了解决方案。

在条件语句是迭代函数的情况下，我总是更喜欢使用

do{
    //task
    //Iterate and store result in var, like in your case
    var = br.readLine();
}while(var != null/*check on var rather than executing iteration*/);

Answer 3

你只检查br.readLine()的return值，而你应该也对待它，这是通用代码：

StringBuider buffer = new StringBuilder();
try (BufferedReader br = new BufferedReader(new FileReader(file.getAbsolutePath()))) {
    String line;
    while((line = br.readLine()) != null) {
        buffer.append(line);
    }
}

BufferedReader 不读取整个文本文件

BufferedReader not reading entire text file

java

bufferedreader