test
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10
Test.java
10
Test.java
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import java.io.*;
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public class Test {
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public static void main(String[] args) throws Exception {
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Writer writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("/home/test.txt")));
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writer.write("hello world!!");
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writer.flush();
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writer.close();
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}
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}
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.example</groupId>
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<artifactId>demo</artifactId>
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<version>1</version>
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<name>demo</name>
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<packaging>war</packaging>
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<properties>
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<maven.compiler.target>1.8</maven.compiler.target>
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<maven.compiler.source>1.8</maven.compiler.source>
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<junit.version>5.6.2</junit.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>javax.servlet-api</artifactId>
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<version>4.0.1</version>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-api</artifactId>
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<version>${junit.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-engine</artifactId>
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<version>${junit.version}</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-war-plugin</artifactId>
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<version>3.3.0</version>
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</plugin>
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</plugins>
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</build>
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</project>
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package controller;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.io.PrintWriter;
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public class HelloWorld extends HttpServlet {
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private String message;
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@Override
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public void init() throws ServletException {
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message = "Hello world, this message is from servlet!";
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}
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@Override
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protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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//设置响应内容类型
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resp.setContentType("text/html");
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//设置逻辑实现
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PrintWriter out = resp.getWriter();
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out.println("<h1>" + message + "</h1>");
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}
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@Override
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public void destroy() {
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super.destroy();
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}
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}
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<?xml version="1.0" encoding="UTF-8"?>
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<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
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version="4.0">
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<servlet>
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<servlet-name>HelloWorld</servlet-name>
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<servlet-class>controller.HelloWorld</servlet-class>
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</servlet>
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<servlet-mapping>
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<servlet-name>HelloWorld</servlet-name>
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<url-pattern>/hello</url-pattern>
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</servlet-mapping>
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</web-app>
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