BufferedReader为什么会有数据遗漏啊？

[zengjz88]

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class TestFile {

	public static void main(String[] args) {

		try {
			//讀取thkj.txt 并進行篩選 放在集合里
			BufferedReader br = new BufferedReader(new FileReader("thkj.txt"));
			List<String> list = getFileList(br);   
            br.close();
            //创建新文件并判断是否存在
            File file = createFile();
            //将筛选的集合写入在创建文件中
            BufferedWriter bw = writeFile(list, file);
            bw.close();
            System.out.println("筛选成功");
		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		}
	}
	//将筛选的集合写入在创建文件中
	private static BufferedWriter writeFile(List<String> list, File file)
			throws IOException {
		BufferedWriter bw = new BufferedWriter(new FileWriter(file));
		for(String str : list){
			bw.write(str);
			bw.newLine();
			bw.flush();
		}
		return bw;
	}
	//创建新文件并判断是否存在
	private static File createFile() throws IOException {
		File file = new File("a.txt");
		if(file.exists()){
			file.delete();
		}
		file.createNewFile();
		return file;
	}
	//讀取thkj.txt 并進行篩選 放在集合里
	private static List<String> getFileList(BufferedReader br)
			throws IOException {
		List<String> list = new ArrayList<String>();  
		String input=null;
		System.out.println(br.readLine());
		while(br.readLine()!=null){         	
				String strTrim = br.readLine();  
				System.out.println(strTrim);
				if(strTrim!=null){          				
					if(strTrim.endsWith("NOT_IN_PENDINGDELETE")){
		    		input = strTrim;
		    		input = input.substring(4,input.indexOf(".cn")+3);
		    		list.add(input.trim());  		
					}
				}
		}
		return list;
	}

}

输入结果：
.
.
.
thkj hangzhoudayinjiweixiu.cn nowc40407695 NOT_IN_PENDINGDELETE
筛选成功

目的：只筛选 第二列 从第四列是 NOT_IN_PENDINGDELETE 的提取

但结果发现好多筛选的时候会遗漏掉....

[非典型射手]

while(br.readLine()!=null){
String strTrim = br.readLine();
System.out.println(strTrim);
if(strTrim!=null){
if(strTrim.endsWith("NOT_IN_PENDINGDELETE")){
input = strTrim;
input = input.substring(4,input.indexOf(".cn")+3);
list.add(input.trim());
}
}
}


每次你读了两行