iotest
This commit is contained in:
xuwujing
parent
43b71bead8
commit
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@ -1,234 +1,235 @@
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package com.pancm.basics;
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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.FileReader;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.io.OutputStreamWriter;
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import java.util.Properties;
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/**
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* @Title: IoTest
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* @Description:
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* io字符流和字节流测试
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* @Version:1.0.0
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* @author pancm
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* @date 2018年6月11日
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*/
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public class IoTest {
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public static void main(String[] args) {
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try {
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// test();
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// test2();
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// test3();
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// test4();
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// test5();
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// test6();
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test7();
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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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* 字符流
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* @throws IOException
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*/
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private static void test() throws IOException {
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String str;
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// 使用 System.in 创建 BufferedReader
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BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
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System.out.println("输入字符, 输入 'quit' 退出。");
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// 读取字符
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do {
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str=br.readLine();
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System.out.println("您输入的字符是:"+str);
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} while(!str.equals("quit"));
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br.close();
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}
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/**
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* 字节流
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* 创建一个文件并新增一条记录
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* @throws IOException
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*/
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private static void test2() throws IOException {
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String path="E:/test/hello.txt";
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String str="hello world";
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//创建一个文件并向文件中写数据 需要文件夹存在
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OutputStream output = new FileOutputStream(path);
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output.write(str.getBytes());
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output.close();
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}
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/**
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* 写入和读取文件
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* @throws IOException
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*/
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private static void test3() throws IOException {
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//创建要操作的文件路径和名称
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String path ="E:/test/hello.txt";
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String str="你好!";
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FileWriter fw = new FileWriter(path);
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BufferedWriter bw=new BufferedWriter(fw);
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bw.write(str);
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bw.close();
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fw.close();
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FileReader fr = new FileReader(path);
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BufferedReader br=new BufferedReader(fr);
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StringBuffer sb=new StringBuffer();
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while(br.ready()){
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sb.append((char)br.read());
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}
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System.out.println("输出:"+sb.toString());
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br.close();
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fr.close();
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}
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/**
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* 字节流
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* 创建一个文件并读取记录 防止乱码
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* @throws IOException
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*/
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private static void test4() throws IOException {
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String path="E:/test/hello.txt";
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String path2="E:/test/你好.txt";
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String str="你好!";
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//从文件读取数据
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InputStream input = new FileInputStream(path);
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InputStreamReader reader = new InputStreamReader(input, "UTF-8");
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StringBuffer sb=new StringBuffer();
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while(reader.ready()){
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sb.append((char)reader.read());
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}
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input.close();
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reader.close();
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//创建一个文件并向文件中写数据
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OutputStream output = new FileOutputStream(path2);
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OutputStreamWriter writer = new OutputStreamWriter(output, "UTF-8");
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writer.write(sb+str);
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writer.close();
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output.close();
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//从文件读取数据
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InputStream input2 = new FileInputStream(path2);
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InputStreamReader reader2 = new InputStreamReader(input2, "UTF-8");
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StringBuffer sb2=new StringBuffer();
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while(reader2.ready()){
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sb2.append((char)reader2.read());
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}
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System.out.println("输出:"+sb2);
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input2.close();
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reader2.close();
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}
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/**
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* 字符流
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* 写入和读取文件
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* @throws IOException
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*/
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private static void test6() throws IOException {
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//创建要操作的文件路径和名称
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//其中，File.separator表示系统相关的分隔符，Linux下为：/ Windows下为：\\
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String path ="E:/test2/hello.txt";
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String str="hello world";
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FileWriter fw = new FileWriter(path);
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//以path为路径创建一个新的FileWriter对象
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//如果需要追加数据，而不是覆盖，则使用FileWriter（path，true）构造方法
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//将字符串写入到流中，\r\n表示换行想有好的
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fw.write(str);
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fw.close();
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FileReader fr = new FileReader(path);
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StringBuffer sb=new StringBuffer();
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while(fr.ready()){
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sb.append((char)fr.read());
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}
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System.out.println("输出:"+sb.toString());
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fr.close();
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}
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/**
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* 字符流
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* 写入和读取文件
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* @throws IOException
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*/
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private static void test7() throws IOException {
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//创建要操作的文件路径和名称
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String path ="E:/test2/hello.txt";
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Properties prop=new Properties();
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prop.setProperty("name", "zz");
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FileWriter fw = new FileWriter(path);
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BufferedWriter bw=new BufferedWriter(fw);
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bw.write(prop.toString());
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bw.close();
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fw.close();
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FileReader fr = new FileReader(path);
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BufferedReader br=new BufferedReader(fr);
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StringBuffer sb=new StringBuffer();
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while(br.ready()){
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sb.append((char)br.read());
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}
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System.out.println("输出:"+sb.toString());
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br.close();
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fr.close();
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}
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/**
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* 新建文件夹和文件
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* @throws IOException
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*/
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private static void test5() throws IOException {
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String path="E:/test/test2";
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String path2="E:/test/test3/test3";
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String path3="E:/test/test2/test2.txt";
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File f = new File(path);
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File f2 = new File(path2);
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File f3 = new File(path3);
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//创建文件夹
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System.out.println("="+f.mkdir());
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//创建文件夹和所有父文件夹
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System.out.println("=="+f2.mkdirs());
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//创建一个文本
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System.out.println("==="+f3.createNewFile());
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//获取名称
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System.out.println("==="+f3.getName());
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//获取父级名称
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System.out.println("==="+f3.getParent());
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//获取当前路径
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System.out.println("==="+f3.getPath());
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//判断是否是目录
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System.out.println("=="+f2.isDirectory());
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System.out.println("==="+f3.isDirectory());
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//删除该文件
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System.out.println("==="+f3.delete());
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}
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}
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package com.pancm.basics;
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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.FileReader;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.io.OutputStreamWriter;
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import java.util.Properties;
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/**
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* @Title: IoTest
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* @Description:
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* io字符流和字节流测试
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* @Version:1.0.0
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* @author pancm
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* @date 2018年6月11日
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*/
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public class IoTest {
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public static void main(String[] args) {
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try {
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// test();
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// test2();
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// test3();
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// test4();
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test5();
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// test6();
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// test7();
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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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* 字符流
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* @throws IOException
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*/
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private static void test() throws IOException {
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String str;
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// 使用 System.in 创建 BufferedReader
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BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
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System.out.println("输入字符, 输入 'quit' 退出。");
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// 读取字符
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do {
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str=br.readLine();
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System.out.println("您输入的字符是:"+str);
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} while(!str.equals("quit"));
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br.close();
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}
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/**
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* 字节流
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* 创建一个文件并新增一条记录
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* @throws IOException
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*/
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private static void test2() throws IOException {
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String path="E:/test/hello.txt";
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String str="hello world";
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//创建一个文件并向文件中写数据 需要文件夹存在
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OutputStream output = new FileOutputStream(path);
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output.write(str.getBytes());
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output.close();
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}
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/**
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* 写入和读取文件
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* @throws IOException
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*/
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private static void test3() throws IOException {
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//创建要操作的文件路径和名称
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String path ="E:/test/hello.txt";
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String str="你好!";
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FileWriter fw = new FileWriter(path);
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BufferedWriter bw=new BufferedWriter(fw);
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bw.write(str);
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bw.close();
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fw.close();
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FileReader fr = new FileReader(path);
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BufferedReader br=new BufferedReader(fr);
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StringBuffer sb=new StringBuffer();
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while(br.ready()){
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sb.append((char)br.read());
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}
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System.out.println("输出:"+sb.toString());
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br.close();
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fr.close();
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}
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/**
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* 字节流
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* 创建一个文件并读取记录 防止乱码
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* @throws IOException
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*/
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private static void test4() throws IOException {
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String path="E:/test/hello.txt";
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String path2="E:/test/你好.txt";
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String str="你好!";
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//从文件读取数据
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InputStream input = new FileInputStream(path);
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InputStreamReader reader = new InputStreamReader(input, "UTF-8");
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StringBuffer sb=new StringBuffer();
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while(reader.ready()){
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sb.append((char)reader.read());
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}
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input.close();
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reader.close();
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//创建一个文件并向文件中写数据
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OutputStream output = new FileOutputStream(path2);
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OutputStreamWriter writer = new OutputStreamWriter(output, "UTF-8");
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writer.write(sb+str);
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writer.close();
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output.close();
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//从文件读取数据
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InputStream input2 = new FileInputStream(path2);
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InputStreamReader reader2 = new InputStreamReader(input2, "UTF-8");
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StringBuffer sb2=new StringBuffer();
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while(reader2.ready()){
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sb2.append((char)reader2.read());
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}
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System.out.println("输出:"+sb2);
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input2.close();
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reader2.close();
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}
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/**
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* 字符流
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* 写入和读取文件
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* @throws IOException
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*/
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private static void test6() throws IOException {
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//创建要操作的文件路径和名称
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//其中，File.separator表示系统相关的分隔符，Linux下为：/ Windows下为：\\
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String path ="E:/test2/hello.txt";
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String str="hello world";
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FileWriter fw = new FileWriter(path);
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//以path为路径创建一个新的FileWriter对象
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//如果需要追加数据，而不是覆盖，则使用FileWriter（path，true）构造方法
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//将字符串写入到流中，\r\n表示换行想有好的
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fw.write(str);
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fw.close();
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FileReader fr = new FileReader(path);
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StringBuffer sb=new StringBuffer();
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while(fr.ready()){
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sb.append((char)fr.read());
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}
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System.out.println("输出:"+sb.toString());
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fr.close();
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}
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/**
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* 字符流
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* 写入和读取文件
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* @throws IOException
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*/
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private static void test7() throws IOException {
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//创建要操作的文件路径和名称
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String path ="E:/test2/hello.txt";
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Properties prop=new Properties();
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prop.setProperty("name", "zz");
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FileWriter fw = new FileWriter(path);
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BufferedWriter bw=new BufferedWriter(fw);
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bw.write(prop.toString());
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bw.close();
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fw.close();
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FileReader fr = new FileReader(path);
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BufferedReader br=new BufferedReader(fr);
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StringBuffer sb=new StringBuffer();
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while(br.ready()){
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sb.append((char)br.read());
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}
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System.out.println("输出:"+sb.toString());
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br.close();
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fr.close();
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}
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/**
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* 新建文件夹和文件
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* @throws IOException
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*/
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private static void test5() throws IOException {
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String path="E:/test/test2";
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String path2="E:/test/test3/test3";
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String path3="E:/test/test2/test2.txt";
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File f = new File(path);
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File f2 = new File(path2);
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File f3 = new File(path3);
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System.out.println(f.exists());
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//创建文件夹
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System.out.println("="+f.mkdir());
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//创建文件夹和所有父文件夹
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System.out.println("=="+f2.mkdirs());
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//创建一个文本
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System.out.println("==="+f3.createNewFile());
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//获取名称
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System.out.println("==="+f3.getName());
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//获取父级名称
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System.out.println("==="+f3.getParent());
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//获取当前路径
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System.out.println("==="+f3.getPath());
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//判断是否是目录
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System.out.println("=="+f2.isDirectory());
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System.out.println("==="+f3.isDirectory());
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//删除该文件
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System.out.println("==="+f3.delete());
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}
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}
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