Initial commit

.gitignore

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+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
+.idea/

pom.xml

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+<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>com.example</groupId>
+    <artifactId>cli-example</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <dependencies>
+        <!-- Apache Commons CLI 依赖 -->
+        <dependency>
+            <groupId>commons-cli</groupId>
+            <artifactId>commons-cli</artifactId>
+            <version>1.4</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+            <!-- 配置 Maven 插件以将项目打包成 JAR 文件 -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>3.2.0</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <!-- 指定主类 -->
+                            <mainClass>cli.HelloWorldCLI</mainClass>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <version>3.3.0</version>
+                <configuration>
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                    <archive>
+                        <manifest>
+                            <mainClass>cli.HelloWorldCLI</mainClass>
+                        </manifest>
+                    </archive>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>make-assembly</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

src/main/java/cli/HelloWorldCLI.java

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+package cli;
+
+import org.apache.commons.cli.*;
+
+public class HelloWorldCLI {
+    public static void main(String[] args) {
+        // 定义命令行选项
+        Options options = new Options();
+        options.addOption("h", "help", false, "Print this help message");
+        options.addOption("g", "greeting", true, "Set the greeting message");
+
+        // 创建命令行解析器
+        CommandLineParser parser = new DefaultParser();
+
+        try {
+            // 解析命令行参数
+            CommandLine cmd = parser.parse(options, args);
+
+            if (cmd.hasOption("h")) {
+                // 输出帮助信息
+                HelpFormatter formatter = new HelpFormatter();
+                formatter.printHelp("cli.HelloWorldCLI", options);
+            } else {
+                // 获取并输出命令行参数
+                String greeting = cmd.getOptionValue("g", "Hello");
+                System.out.println(greeting + ", World!");
+            }
+        } catch (ParseException e) {
+            // 解析失败，输出错误信息
+            System.err.println("Error parsing command line: " + e.getMessage());
+        }
+    }
+}