6.Eclipse下创建Maven项目

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Eclipse下创建Maven项目

1. 创建项目

创建一个简单项目:

2. pom.xml

加入相关依赖

加入常量配置

排除相关依赖

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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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.emp</groupId>
	<artifactId>maven_java_helloworld_01</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>maven_01</name>

	<!-- constant -->
	<properties>
		<spring.version>5.2.12.RELEASE</spring.version>
	</properties>

	<!-- denpendency -->
	<dependencies>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring.version}</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>${spring.version}</version>
		</dependency>

		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.73</version>
		</dependency>

		<dependency>
			<groupId>redis.clients</groupId>
			<artifactId>jedis</artifactId>
			<version>3.3.0</version>
			<!-- exclusion -->
			<exclusions>
				<exclusion>
					<groupId>org.apache.commons</groupId>
					<artifactId>commons-pool2</artifactId>
				</exclusion>
			</exclusions>
		</dependency>

	</dependencies>

</project>

3. scope的说明

compile：编译依赖范围，在三个classpath都有效。默认的

test：测试依赖范围，在编译代码和运行代码是无效。

provided：以提供的依赖范围，在编译和测试的时候有效，在运行的时候无效。例如servlet-api,因为容器已经提供，在运行的时候是不需要的。

runtime：运行时依赖范围，仅在测试和运行的时候有效。例如jdbc只有在测试和运行的时候才有效。

system：系统依赖范围，与provided范围一致，但是依赖是通过系统变量来指定依赖，不利于移植。

4. 导入本地jar包

(1) 创建一个普通Java项目Java Project

创建一个User类

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package com.bean;

public class User {

	private Integer id;
	private String name;
	private Integer age;
	
	public User() {
		super();
	}
	
	public User(Integer id, String name, Integer age) {
		super();
		this.id = id;
		this.name = name;
		this.age = age;
	}


	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}

	@Override
	public String toString() {
		return "User [id=" + id + ", name=" + name + ", age=" + age + "]";
	}
	
}

导出为MyUser.jar

(2) 创建一个Maven Project

创建一个Book类

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package com.bean;

public class User {

	private Integer id;
	private String name;
	private Integer age;
	
	public User() {
		super();
	}
	
	public User(Integer id, String name, Integer age) {
		super();
		this.id = id;
		this.name = name;
		this.age = age;
	}


	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}

	@Override
	public String toString() {
		return "User [id=" + id + ", name=" + name + ", age=" + age + "]";
	}
	
}

导出为MyBook.jar

(3) 在另外的maven项目

在pom.xml中添加

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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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.emp</groupId>
	<artifactId>maven_java_helloworld_01</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>maven_01</name>

	<!-- denpendency -->
	<dependencies>
		<dependency>
			<groupId>com.my.dependent</groupId>
			<artifactId>mybean</artifactId>
			<version>1.0</version>
			<scope>system</scope>
			<systemPath>E:\MyUser.jar</systemPath>

		</dependency>

		<dependency>
			<groupId>com.my.dependent</groupId>
			<artifactId>myvo</artifactId>
			<version>0.0.1-SNAPSHOT</version>
			<scope>system</scope>
			<systemPath>E:\MyBook.jar</systemPath>
		</dependency>

	</dependencies>

</project>

测试类: 

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package com.test;

import com.bean.User;
import com.vo.Book;

public class Test {

	public static void main(String[] args) {
		User user = new User();
		user.setId(1);
		user.setName("Tim");
		user.setAge(10);
		
		System.out.println(user.toString());
		
		Book book = new Book();
		book.setTitle("bookName");
		book.setPrice(30);
		book.setPage(200);
		book.setCategory("science");
		
		System.out.println(book.toString());
		
	}
}

output: 

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User [id=1, name=Tim, age=10]
Book [title=bookName, price=30, page=200, category=science]