11、 maven发布web项目_parent maven 发布 web-优快云博客

本文链接：https://blog.youkuaiyun.com/zheng0518/article/details/38801707

1、新建maven project，然后选择webapp的框架

2、写一个Servlet

package com.onyas.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.onyas.user.model.User;

public class HelloServlet extends HttpServlet {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		
		req.setAttribute("user", new User("admin","123","管理员"));
		req.getRequestDispatcher("/hello.jsp").forward(req, resp);
		
	}
	
}

3、在src/main/webapp/WEB-INF/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

	<servlet>
		<servlet-name>HelloServlet</servlet-name>
		<servlet-class>com.onyas.servlet.HelloServlet</servlet-class>
	</servlet>

	<servlet-mapping>
		<servlet-name>HelloServlet</servlet-name>
		<url-pattern>/hello.do</url-pattern>
	</servlet-mapping>
</web-app>

4、在src/main/webap下新建hello.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
	Hello---->${user.nickname }
</body>
</html>

5、修改因为有引入User类，所以要添加对其它模块的依赖，如果这时候报找不到自己写的jar包时，是因为没有把自己写的模块安装到本地仓库中，需要在自己的模块pom.xml中执行clean install.

<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/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<parent>
		<groupId>com.onyas.user</groupId>
		<artifactId>user-parent</artifactId>
		<version>0.0.1-SNAPSHOT</version>
		<relativePath>../user-parent/pom.xml</relativePath>
	</parent>

	<artifactId>user-web</artifactId>
	<packaging>war</packaging>
	<name>user-web Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.10</version>
			<scope>test</schttp://localhost:8080/user-web/hello.doope>
		</dependency>
		<!-- 对servlet的依赖 -->
		<dependency>
			<groupId>org.mortbay.jetty</groupId>
			<artifactId>servlet-api</artifactId>
			<version>2.5.20110712</version>
		</dependency>
		<dependency>
			<groupId>${project.groupId}</groupId>
			<artifactId>user-services</artifactId>
			<version>${project.version}</version>
		</dependency>
	</dependencies>
	<build>
		<finalName>user-web</finalName>
	</build>
</project>

6、在pom.xml上右键run as -->maven build..-->输入clean package..会在target包下生成war包，把这个war包拷贝到tomcat下webapp目录下，启动tomcat就可以了

在浏览器中输入http://localhost:8080/user-web/hello.do，即可看到结果。

7、这样做每次修改后都要执行clean package,然后拷贝war包，然后运行tomcat,很麻烦，所以现在有一个插件，搜索copy maven plugin就可以。

更好的一种做好是用jetty发布，首先在父pom.xml中配置对jetty插件：

<!-- 配置jetty的插件  -->
				<plugin>
					<groupId>org.mortbay.jetty</groupId>
					<artifactId>jetty-maven-plugin</artifactId>
					<configuration>
						<scanIntervalSeconds>10</scanIntervalSeconds>
						<webApp>
							<contextPath>/hello</contextPath>
						</webApp>
						<!-- 配置监听端口 -->
						<connectors>
							<connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector">
								<port>8082</port>
								<maxIdleTime>60000</maxIdleTime>
							</connector>
						</connectors>
					</configuration>
				</plugin>

然后在web项目中加入jetty插件：

<build>
		<finalName>user-web</finalName>
		<plugins>
			<!-- 添加jetty插件 -->
			<plugin>
				<groupId>org.mortbay.jetty</groupId>
				<artifactId>jetty-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

在web项目的pom.xml中右键 run as -->maven builder..->clean compile jetty:run，就会看到控制台启动jetty，启动完成后，即可在浏览器中试验