package com.java110.code;
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import java.io.*;
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public class BaseGenerator {
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//首字母转小写
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public static String toLowerCaseFirstOne(String s){
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if(Character.isLowerCase(s.charAt(0)))
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return s;
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else
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return (new StringBuilder()).append(Character.toLowerCase(s.charAt(0))).append(s.substring(1)).toString();
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}
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//首字母转大写
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public static String toUpperCaseFirstOne(String s){
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if(Character.isUpperCase(s.charAt(0)))
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return s;
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else
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return (new StringBuilder()).append(Character.toUpperCase(s.charAt(0))).append(s.substring(1)).toString();
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}
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/**
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* 读入TXT文件
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*/
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public static StringBuffer readFile(String pathname) {
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StringBuffer sb = new StringBuffer();
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try (FileReader reader = new FileReader(pathname);
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BufferedReader br = new BufferedReader(reader) // 建立一个对象，它把文件内容转成计算机能读懂的语言
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) {
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String line ="";
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//网友推荐更加简洁的写法
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while ((line = br.readLine()) != null) {
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// 一次读入一行数据
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sb.append(line+"\n");
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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return sb;
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}
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/**
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* 写入TXT文件
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*/
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public static void writeFile(String filePath,String fileName) {
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try {
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File writeName = new File(filePath); // 相对路径，如果没有则要建立一个新的output.txt文件
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writeName.createNewFile(); // 创建新文件,有同名的文件的话直接覆盖
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try (FileWriter writer = new FileWriter(writeName);
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BufferedWriter out = new BufferedWriter(writer)
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) {
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out.write(fileName);
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out.flush(); // 把缓存区内容压入文件
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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