笔记第1章流与文件(2) 组合流过滤器

原创

钰娘娘ynn 2022-07-08 10:11:09 博主文章分类：《Java核心技术卷2》 ©著作权

文章标签 p2p linq webview 处理流输入输出流 文章分类 后端开发

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1.1.3 组合流过滤器

节点流：基本的输入输出流

处理流：包装基本流，进行输入输出的叫做处理流

通常两者间的区别是，节点流创建容易，处理步骤复杂；处理流创建麻烦，处理步骤容易。

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import java.io.*;
 
public class Main {
    public static void main(String[] args){
        BufferedReader br = null;
        BufferedWriter bw = null;
        try {
            String str = "Returns <tt>true</tt> if this map maps one or more keys to the\n" +
                    "specified value.  More formally, returns <tt>true</tt> if and only if\n" +
                    "this map contains at least one mapping to a value <tt>v</tt> such that\n" +
                    "<tt>(value==null ? v==null : value.equals(v))</tt>.  This operation\n" +
                    "will probably require time linear in the map size for most\n" +
                    "implementations of the <tt>Map</tt> interface.";
 
            String[] parts = str.split("\n");
            bw = new BufferedWriter(new FileWriter("a.properties"));
            for(String part:parts){
                bw.write(part);
                bw.write("\n");
            }
            bw.flush();
 
             br = new BufferedReader(new FileReader("a.properties"));
             String line = null;
             while((line=br.readLine())!=null){
                 System.out.println(line);
             }
 
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if(br!=null){
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
 
            if(bw!=null){
                try {
                    bw.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
 
    }
 
}