Java网络商城项目 SpringBoot+SpringCloud+Vue 网络商城(SSM前后端分离项目)四(微服务搭建-通用工具类-通用异常处理-自定义异常处理)

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Java网络商城项目 SpringBoot+SpringCloud+Vue 网络商城(SSM前后端分离项目)四(功能实现)

一、 微服务搭建

既然是一个全品类的电商购物平台,那么核心自然就是商品。因此我们要搭建的第一个服务,就是商品微服务。其中会包含对于商品相关的一系列内容的管理,包括:

  • 商品分类管理
  • 品牌管理
  • 商品规格参数管理
  • 商品管理
  • 库存管理

1、微服务的结构

因为与商品的品类相关,我们的工程命名为leyou-item.

需要注意的是,我们的leyou-item是一个微服务,那么将来肯定会有其它系统需要来调用服务中提供的接口,获取的接口数据,也需要对应的实体类来封装,因此肯定也会使用到接口中关联的实体类。

因此这里我们需要使用聚合工程,将要提供的接口及相关实体类放到独立子工程中,以后别人引用的时候,只需要知道坐标即可。

我们会在leyou-item中创建两个子工程:

  • leyou-item-interface:主要是对外暴露的接口及相关实体类
  • leyou-item-service:所有业务逻辑及内部使用接口

2、创建父工程ly-item

依然是Maven构建:



完善pom.xml

3、创创建leyou-item-interface



注意目录结构

此时的项目结构:

4、创建:leyou-item-service



5、添加依赖:在ly-item-service下的pom.xml当中

<?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">
    <parent>
        <artifactId>ly-item</artifactId>
        <groupId>com.leyou.service</groupId>
        <version>1.0.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>ly-item-service</artifactId>

    <dependencies>
        <!-- web启动器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- eureka客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!-- 通用mapper启动器 -->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
        </dependency>
        <!-- 分页助手启动器 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
        </dependency>
        <!-- mysql驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>com.leyou.service</groupId>
            <artifactId>ly-item-interface</artifactId>
            <version>1.0.0-SNAPSHOT</version>
        </dependency>
    </dependencies>

</project>

6、编写启动和配置

(1)编写启动类


package com.leyou;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient
public class LyItemServiceApplication {
    public static void main(String[] args) {
        SpringApplication.run(LyItemServiceApplication.class);
    }
}

(2)编写配置文件



server:
  port: 8083
spring:
  application:
    name: item-service
  datasource:
    url: jdbc:mysql://localhost:3306/leyou
    username: root
    password: root
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:10086/eureka
  instance:
    prefer-ip-address: true
    ip-address: 127.0.0.1

(3)添加商品微服务的路由规则

既然商品微服务已经创建,接下来肯定要添加路由规则到Zuul中,我们不使用默认的路由规则。

修改ly-gateway工程的application.yml配置文件:

  routes:
    item-service: /item/**  # 商品微服务的映射路径

7、启动测试

我们分别启动:leyou-registry,leyou-gateway,leyou-item-service



全部启动成功

访问http://localhost:10086/

8、设置注册中心不注册自己

通过上述内容我们发现注册中心注册了自己

server:
  port: 10086
spring:
  application:
    name: ly-registry
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:10086/eureka
    register-with-eureka: false  #设置注册中心注不注册自己
    fetch-registry: false  #要不要去注册中心获取其他服务的地址

二、 通用工具模块

1、创建ly-common



2、创建对应的包结构


3、创建相应的工具类

(1)CookieUtils

package com.leyou.common.utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
/**
 * 
 * Cookie 工具类
 *
 */
public final class CookieUtils {

	protected static final Logger logger = LoggerFactory.getLogger(CookieUtils.class);

	/**
	 * 得到Cookie的值, 不编码
	 * 
	 * @param request
	 * @param cookieName
	 * @return
	 */
	public static String getCookieValue(HttpServletRequest request, String cookieName) {
		return getCookieValue(request, cookieName, false);
	}

	/**
	 * 得到Cookie的值,
	 * 
	 * @param request
	 * @param cookieName
	 * @return
	 */
	public static String getCookieValue(HttpServletRequest request, String cookieName, boolean isDecoder) {
		Cookie[] cookieList = request.getCookies();
		if (cookieList == null || cookieName == null){
			return null;			
		}
		String retValue = null;
		try {
			for (int i = 0; i < cookieList.length; i++) {
				if (cookieList[i].getName().equals(cookieName)) {
					if (isDecoder) {
						retValue = URLDecoder.decode(cookieList[i].getValue(), "UTF-8");
					} else {
						retValue = cookieList[i].getValue();
					}
					break;
				}
			}
		} catch (UnsupportedEncodingException e) {
			logger.error("Cookie Decode Error.", e);
		}
		return retValue;
	}

	/**
	 * 得到Cookie的值,
	 * 
	 * @param request
	 * @param cookieName
	 * @return
	 */
	public static String getCookieValue(HttpServletRequest request, String cookieName, String encodeString) {
		Cookie[] cookieList = request.getCookies();
		if (cookieList == null || cookieName == null){
			return null;			
		}
		String retValue = null;
		try {
			for (int i = 0; i < cookieList.length; i++) {
				if (cookieList[i].getName().equals(cookieName)) {
					retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString);
					break;
				}
			}
		} catch (UnsupportedEncodingException e) {
			logger.error("Cookie Decode Error.", e);
		}
		return retValue;
	}

	/**
	 * 设置Cookie的值 不设置生效时间默认浏览器关闭即失效,也不编码
	 */
	public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue) {
		setCookie(request, response, cookieName, cookieValue, -1);
	}

	/**
	 * 设置Cookie的值 在指定时间内生效,但不编码
	 */
	public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage) {
		setCookie(request, response, cookieName, cookieValue, cookieMaxage, false);
	}

	/**
	 * 设置Cookie的值 不设置生效时间,但编码
	 */
	public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, boolean isEncode) {
		setCookie(request, response, cookieName, cookieValue, -1, isEncode);
	}

	/**
	 * 设置Cookie的值 在指定时间内生效, 编码参数
	 */
	public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {
		doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, isEncode);
	}

	/**
	 * 设置Cookie的值 在指定时间内生效, 编码参数(指定编码)
	 */
	public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, String encodeString) {
		doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString);
	}

	/**
	 * 删除Cookie带cookie域名
	 */
	public static void deleteCookie(HttpServletRequest request, HttpServletResponse response, String cookieName) {
		doSetCookie(request, response, cookieName, "", -1, false);
	}

	/**
	 * 设置Cookie的值,并使其在指定时间内生效
	 * 
	 * @param cookieMaxage
	 *            cookie生效的最大秒数
	 */
	private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {
		try {
			if (cookieValue == null) {
				cookieValue = "";
			} else if (isEncode) {
				cookieValue = URLEncoder.encode(cookieValue, "utf-8");
			}
			Cookie cookie = new Cookie(cookieName, cookieValue);
			if (cookieMaxage > 0)
				cookie.setMaxAge(cookieMaxage);
			if (null != request)// 设置域名的cookie
				cookie.setDomain(getDomainName(request));
			cookie.setPath("/");
			response.addCookie(cookie);
		} catch (Exception e) {
			logger.error("Cookie Encode Error.", e);
		}
	}

	/**
	 * 设置Cookie的值,并使其在指定时间内生效
	 * 
	 * @param cookieMaxage
	 *            cookie生效的最大秒数
	 */
	private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, String encodeString) {
		try {
			if (cookieValue == null) {
				cookieValue = "";
			} else {
				cookieValue = URLEncoder.encode(cookieValue, encodeString);
			}
			Cookie cookie = new Cookie(cookieName, cookieValue);
			if (cookieMaxage > 0)
				cookie.setMaxAge(cookieMaxage);
			if (null != request)// 设置域名的cookie
				cookie.setDomain(getDomainName(request));
			cookie.setPath("/");
			response.addCookie(cookie);
		} catch (Exception e) {
			logger.error("Cookie Encode Error.", e);
		}
	}

	/**
	 * 得到cookie的域名
	 */
	private static final String getDomainName(HttpServletRequest request) {
		String domainName = null;

		String serverName = request.getRequestURL().toString();
		if (serverName == null || serverName.equals("")) {
			domainName = "";
		} else {
			serverName = serverName.toLowerCase();
			serverName = serverName.substring(7);
			final int end = serverName.indexOf("/");
			serverName = serverName.substring(0, end);
			final String[] domains = serverName.split("\\\\.");
			int len = domains.length;
			if (len > 3) {
				// www.xxx.com.cn
				domainName = domains[len - 3] + "." + domains[len - 2] + "." + domains[len - 1IDEA SpringBoot 项目打包成jar包

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