IOUtil类

最新推荐文章于 2025-01-22 14:17:14 发布

原创最新推荐文章于 2025-01-22 14:17:14 发布 · 244 阅读

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文章标签：

#BufferedReader #File #FileReader #InputStream #InputStreamReader

java 专栏收录该内容

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本文详细介绍了Java中文件读取的基本方法，包括使用FileReader和BufferedReader进行本地文件读取，以及如何通过URL获取远程资源并进行字符集转换。重点展示了如何将文本内容读取到StringBuilder中，并进行了简单的字符集转换演示。

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package test;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;

public class IOUtil {

    public static BufferedReader getReader(String urlString) throws Exception, IOException {
        FileReader fileReader = null;
        File file = null;
        BufferedReader br = null;
        try {
            file = new File(urlString);
            fileReader = new FileReader(file);
            br = new BufferedReader(fileReader);
            return br;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    public static BufferedReader getReaderTo(String urlString,
            String chartSetString) throws Exception, IOException {
        URL url;
        InputStream is = null;
        InputStreamReader isr = null;
        BufferedReader br = null;
        try {
            url = new URL(urlString);
            is = url.openStream();
            isr = new InputStreamReader(is,chartSetString);
            br = new BufferedReader(isr);
            return br;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) throws Exception, IOException {

        // 阅读正文
        //BufferedReader br = IOUtil.getReader("D:\\wanglongjun.html", "utf-8");
        BufferedReader br = IOUtil.getReaderTo("file:\\D:\\wanglongjun.html", "UTF-8");
        StringBuilder sb = new StringBuilder();
        String temp = null;
        while ((temp = br.readLine()) != null) {
            //temp=new String(temp.getBytes("GBK"), "UTF-8");
            sb.append(temp);
        }

        System.out.println(sb.toString());
    }
}