java文件读取和文件创建-蒲公英云

java文件读取和文件创建

怼烎@ 2024-05-23 14:13 118阅读 0赞

java文件读取和文件创建

文章目录

java文件读取和文件创建
前言
一、任意文件创建
二、任意文件读取

前言

java文件读取和文件创建,在jsp中的应用
pom文件：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.example</groupId>
    <artifactId>webvul</artifactId>
    <version>1.0-SNAPSHOT</version>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>8</source>
                    <target>8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
</project>

一、任意文件创建

<%@ page import="java.io.FileOutputStream" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>fileCreate</title>
</head>
<body>
<%
    FileOutputStream fos = new FileOutputStream("C:\\Users\\fly\\IdeaProjects\\webvul\\web\\"+request.getParameter("name"));
    fos.write(request.getParameter("c").getBytes());
    fos.flush();
    fos.close();
%>
</body>
</html>

成功创建test.txt文件
在这里插入图片描述
执行成功

二、任意文件读取

<%@ page import="java.io.FileInputStream" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>fileRead</title>
</head>
<body>
<%
    FileInputStream fileInputStream = new FileInputStream("C:\\Users\\fly\\IdeaProjects\\webvul\\web\\"+request.getParameter("file"));
    int tmp;
    while ((tmp=fileInputStream.read())!=-1){
        out.write(tmp);
    }
%>
</body>
</html>