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创建Maven分布式前台系统架构,写出京动态导航,跨域返Json

创建Maven分布式前台系统架构,写出京动态导航,跨域返Json

作者: Java成长记_Camel | 来源:发表于2019-01-22 14:41 被阅读14次

    前台系统架构

    image.png

    分层的架构有什么好处:

    1. 有利于系统的维护,扩展。
    2. 分层的结构是按照功能细化,细化之后就能够分布式的部署。
    3. 灵活性
    4. 前台系统与服务层可以分离
    5. 开发团队可以分开,提高开发效率

    缺点:

    1. 服务器之间需要使用接口进行通信,开发的工作量提高

    前台系统可以分为两部分:

    1. 服务层的web工程 功能就是发布服务
    2. 表现层:负责展现页面,没有业务逻辑,所有的业务就是调用服务层的服务
      搭建服务protal-rest系统
      服务的形式:使用http协议传递json数据,主要的功能是供其它系统进行调用

    服务层所使用技术

    1. Mybatis
    2. Spring
    3. SpringMVC

    搭建protal-rest的过程与protal-manager-web整合的过程一样

    搭建前台(门户)系统:它可以将各种应用,数据的资源以及互联网的资源集成到一个信息管理平台上。并以统一的用户界面提供给我们的用户。
    所使用的技术:

    1. Spring+SpringMVC
    2. JS CSS JQuery Bootstrap AngularJS NodeJS React H5
    3. HttpClient

    实现商品分类的展示流程

    image.png image.png

    Protal-rest进行发布服务
    需求
    请求的URL:是当鼠标滑动到链接的时候,就会发出一个事件,做一个Ajax的请求(json数据),这些数据会包含分类的信息,得到数据之后需要初始化分类的菜单并展现出业


    image.png
    注意:

    所有的分类的数据要从protal-rest中的获取
    如果我们要从protal-front里面获取json数据是没有问题,但是我们现在要从protal-rest中获取json数据。所以我们就可以使用ajax请求去调用服务器的数据。

    这样就会出现跨域访问的问题
    Failed to load http://localhost:8081/category.json: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8082' is therefore not allowed access.

    跨域问题

    1. 什么是跨域?
      a) 域名不同
      b) 域名相同但是端口不同
    2. 跨域问题是浏览器的安全的限制,不允许js进行跨域的访问。

    如何解决跨域的问题:使用jsonp来解决跨域的问题

    1. Jsonp的原理:
      浏览器在js请求的时候,是可以通过<script>标签中的src来跨域的请求,Js是不能够进行跨域请求数据的,但是js可以跨域请求js的脚本。得到这个js脚本之后就会立即执行的。那么我主可以把数据作为参数传递到方法中,就可以得到数据了。从而解决了跨域访问的问题。
      $.getJSONP(this.URL_Serv, category.getDataService);
      它有两个参数:第一个参数是请求的url,第二个参数是要调用的方法。所以我们在category.json中是用category.getDataService()把数据包装起来的,作为参数。然后这个json中的数据就会变成一个js的脚本片段。那么该js片段在传回调用方法里的时候就会立即执行。相当于执行的category.getDataService()方法。会把json数据当成参数。
    image.png

    图二


    image

    创建foreknow-rest 也是继承parent

    image.png

    配置pom.xml

    <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>
      <parent>
            <groupId>com.foreknow</groupId>
            <artifactId>foreknow-parent</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </parent>
      <groupId>com.foreknow</groupId>
      <artifactId>foreknow-rest</artifactId>
      <version>0.0.1-SNAPSHOT</version>
      <packaging>war</packaging>
      <dependencies>
            <dependency>
                <groupId>com.foreknow</groupId>
                <artifactId>foreknow-manager-mapper</artifactId>
                <version>0.0.1-SNAPSHOT</version>
            </dependency>
        <!--    String -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</artifactId>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
                <scope>provided</scope>
            </dependency>
                <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jsp-api</artifactId>
                <scope>provided</scope>
            </dependency>
        <!--    文件上传组件 -->
    <dependency>
                <groupId>commons-fileupload</groupId>
                <artifactId>commons-fileupload</artifactId>
            </dependency>
        
      </dependencies>
      <build>
            <plugins>
                <plugin>
                    <groupId>org.apache.tomcat.maven</groupId>
                    <artifactId>tomcat7-maven-plugin</artifactId>
                    <version>2.2</version>
                    <configuration>
                        <port>8081</port>
                        <path>/</path>
                        <uriEncoding>UTF-8</uriEncoding>
                    </configuration>
                </plugin>
            </plugins>
        </build>
    </project>
    
    
    image.png

    设置run configurations 服务器

    image.png image.png

    位置 web.xml 中央控制器

    <?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
      <display-name>foreknow-rest</display-name>
      <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
      </welcome-file-list>
       <!-- 加载spring容器 -->
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/applicationContext-*.xml</param-value>
        </context-param>
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
        <!-- 解决post乱码 -->
        <filter>
            <filter-name>CharacterEncodingFilter</filter-name>
            <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
            <init-param>
                <param-name>encoding</param-name>
                <param-value>utf-8</param-value>
            </init-param>
        </filter>
        <filter-mapping>
            <filter-name>CharacterEncodingFilter</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
        <!-- springmvc的前端控制器 -->
        <servlet>
            <servlet-name>foreknow-rest</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <!-- contextConfigLocation不是必须的, 如果不配置contextConfigLocation, springmvc的配置文件默认在:WEB-INF/servlet的name+"-servlet.xml" -->
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:spring/springmvc.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
            <servlet-name>foreknow-rest</servlet-name>
            <url-pattern>/rest/*</url-pattern>
        </servlet-mapping>
    </web-app>
    
    
    

    在src/main/resources

    image.png

    SqlMapConfig.xml

    <?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE configuration
            PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
            "http://mybatis.org/dtd/mybatis-3-config.dtd">
    <configuration>
        <!-- 配置分页插件    拦截器-->
        <plugins>
            <plugin interceptor="com.github.pagehelper.PageHelper">
                <!-- 设置数据库类型 Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六种数据库-->        
                <property name="dialect" value="mysql"/>
            </plugin>
        </plugins>
    </configuration>
    
    

    db.properties

    jdbc.driver=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql://localhost:3306/taobao?characterEncoding=utf-8
    jdbc.username=root
    jdbc.password=root
    
    

    resource.properties

    #FTP\u76F8\u5173\u914D\u7F6E
    #FTP\u7684ip\u5730\u5740
    FTP_ADDRESS=192.168.230.128
    FTP_PORT=21
    FTP_USERNAME=ftpuser
    FTP_PASSWORD=sunyong0305
    FTP_BASE_PATH=/home/ftpuser/www/images
    
    #\u56FE\u7247\u670D\u52A1\u5668\u7684\u76F8\u5173\u914D\u5236
    #\u56FE\u7247\u670D\u52A1\u5668\u7684\u57FA\u7840\u8DEF\u5F84
    #FILI_UPLOAD_PATH=D:/temp/imagestest/webapps/images
    IMAGE_BASE_URL=http://192.168.230.128
    
    

    applicationContext-dao.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
        xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
    
        <!-- 数据库连接池 -->
        <!-- 加载配置文件 -->
        <context:property-placeholder location="classpath:resource/*.properties" />
        <!-- 数据库连接池 -->
        <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
            destroy-method="close">
            <property name="url" value="${jdbc.url}" />
            <property name="username" value="${jdbc.username}" />
            <property name="password" value="${jdbc.password}" />
            <property name="driverClassName" value="${jdbc.driver}" />
            <property name="maxActive" value="10" />
            <property name="minIdle" value="5" />
        </bean>
        <!-- 配置sqlsessionFactory -->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml"></property>
            <property name="dataSource" ref="dataSource"></property>
        </bean>
        <!-- 配置扫描包,加载mapper代理对象 -->
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="com.foreknow.mapper"></property>
        </bean>
    </beans>
    
    

    applicationContext-service.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
        xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
    
        <!-- 扫描包加载Service实现类 -->
        <context:component-scan base-package="com.foreknow.rest.serive"></context:component-scan>
    </beans>
    
    

    applicationContext-trans.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
        xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
    
        <!-- 事务管理器 -->
        <bean id="transactionManager"
            class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <!-- 数据源 -->
            <property name="dataSource" ref="dataSource" />
        </bean>
        <!-- 通知 -->
        <tx:advice id="txAdvice" transaction-manager="transactionManager">
            <tx:attributes>
                <!-- 传播行为 -->
                <tx:method name="save*" propagation="REQUIRED" />
                <tx:method name="insert*" propagation="REQUIRED" />
                <tx:method name="add*" propagation="REQUIRED" />
                <tx:method name="create*" propagation="REQUIRED" />
                <tx:method name="delete*" propagation="REQUIRED" />
                <tx:method name="update*" propagation="REQUIRED" />
                <tx:method name="find*" propagation="SUPPORTS" read-only="true" />
                <tx:method name="select*" propagation="SUPPORTS" read-only="true" />
                <tx:method name="get*" propagation="SUPPORTS" read-only="true" />
            </tx:attributes>
        </tx:advice>
        <!-- 切面 -->
        <aop:config>
            <aop:advisor advice-ref="txAdvice"
                pointcut="execution(* com.foreknow.rest.serive.*.*(..))" />
        </aop:config>
    </beans>
    
    

    springmvc.xml

    
    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:mvc="http://www.springframework.org/schema/mvc"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    
        <context:component-scan base-package="com.foreknow.rest.controller" />
        <mvc:annotation-driven />
        <!-- 定义文件上传解析器 -->
        <bean id="multipartResolver"
            class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            <!-- 设定默认编码 -->
            <property name="defaultEncoding" value="UTF-8"></property>
            <!-- 设定文件上传的最大值5MB,5*1024*1024 -->
            <property name="maxUploadSize" value="5242880"></property>
        </bean>
    <!-- 视图解析器 -->
        <bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/jsp/" />
            <property name="suffix" value=".jsp" />
        </bean>
    
        <mvc:resources location="/WEB-INF/css/" mapping="/css/**" />
        <mvc:resources location="/WEB-INF/js/" mapping="/js/**" />
    </beans>
    
    
    image.png image.png

    接下来 创建一个maven工程 foreknow-protal 继承parent

    image.png

    配置 pom.xml

    <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>
      <parent>
            <groupId>com.foreknow</groupId>
            <artifactId>foreknow-parent</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </parent>
      <groupId>com.foreknow</groupId>
      <artifactId>foreknow-protal</artifactId>
      <version>0.0.1-SNAPSHOT</version>
      <packaging>war</packaging>
      <dependencies>
            <dependency>
                <groupId>com.foreknow</groupId>
                <artifactId>foreknow-common</artifactId>
                <version>0.0.1-SNAPSHOT</version>
            </dependency>
                <!--    String -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</artifactId>
            </dependency>
        <!--    JSP -->
        <dependency>
                <groupId>jstl</groupId>
                <artifactId>jstl</artifactId>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
                <scope>provided</scope>
            </dependency>
                <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jsp-api</artifactId>
                <scope>provided</scope>
            </dependency>
            
      </dependencies>
      <build>
            <plugins>
                <plugin>
                    <groupId>org.apache.tomcat.maven</groupId>
                    <artifactId>tomcat7-maven-plugin</artifactId>
                    <version>2.2</version>
                    <configuration>
                        <port>8082</port>
                        <path>/</path>
                        <uriEncoding>UTF-8</uriEncoding>
                    </configuration>
                </plugin>
            </plugins>
        </build>
    </project>
    
    

    然后升级更新工程

    配置web.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
      <display-name>foreknow-protal</display-name>
      <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
      </welcome-file-list>
      <!-- 加载spring容器 -->
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/applicationContext-*.xml</param-value>
        </context-param>
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
        <!-- 解决post乱码 -->
        <filter>
            <filter-name>CharacterEncodingFilter</filter-name>
            <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
            <init-param>
                <param-name>encoding</param-name>
                <param-value>utf-8</param-value>
            </init-param>
        </filter>
        <filter-mapping>
            <filter-name>CharacterEncodingFilter</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
        <!-- springmvc的前端控制器 -->
        <servlet>
            <servlet-name>foreknow-protal</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <!-- contextConfigLocation不是必须的, 如果不配置contextConfigLocation, springmvc的配置文件默认在:WEB-INF/servlet的name+"-servlet.xml" -->
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:spring/springmvc.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
            <servlet-name>foreknow-protal</servlet-name>
            <url-pattern>*.html</url-pattern>
        </servlet-mapping>
    </web-app>
    
    
    

    然后在 src/main/resources 配置

    image.png

    resource.properties

    #FTP\u76F8\u5173\u914D\u7F6E
    #FTP\u7684ip\u5730\u5740
    FTP_ADDRESS=192.168.230.128
    FTP_PORT=21
    FTP_USERNAME=ftpuser
    FTP_PASSWORD=sunyong0305
    FTP_BASE_PATH=/home/ftpuser/www/images
    
    #\u56FE\u7247\u670D\u52A1\u5668\u7684\u76F8\u5173\u914D\u5236
    #\u56FE\u7247\u670D\u52A1\u5668\u7684\u57FA\u7840\u8DEF\u5F84
    #FILI_UPLOAD_PATH=D:/temp/imagestest/webapps/images
    IMAGE_BASE_URL=http://192.168.230.128
    
    

    applicationContext-service.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
        xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
    
        <!-- 扫描包加载Service实现类 -->
        <context:component-scan base-package="com.foreknow.protal.service"></context:component-scan>
    </beans>
    
    

    springmvc.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:mvc="http://www.springframework.org/schema/mvc"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    
        <context:component-scan base-package="com.foreknow.protal.controller" />
        <mvc:annotation-driven />
        <!-- 定义文件上传解析器 -->
    <!--    <bean id="multipartResolver"
            class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            设定默认编码
            <property name="defaultEncoding" value="UTF-8"></property>
            设定文件上传的最大值5MB,5*1024*1024
            <property name="maxUploadSize" value="5242880"></property>
        </bean> -->
    <!-- 视图解析器 -->
        <bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/jsp/" />
            <property name="suffix" value=".jsp" />
        </bean>
    <!-- 配置静态资源的映射 -->
    <!--    <mvc:resources location="/WEB-INF/css/" mapping="/css/**" />
        <mvc:resources location="/WEB-INF/js/" mapping="/js/**" /> -->
        
    </beans>
    
    

    配置好之后 我们写一下,功能的具体实现

    在rest 前台的服务层中 我们在webapp 同级 创建一个category.json

    用Json Viewer 工具 显示 分析

    image.png image.png

    其中有一个数据源 data

    分为 u n i 对应的i下面还有分组 u n i
    也就是说 有一级标题 还有二级标题

    那么 我们再src/main/java com.foreknow.rest.pojo 包下 创建CatNode.java 和CatResult.java

    分别对应 根 data 和 子分类
    CatNode.java

    package com.foreknow.rest.pojo;
    
    import java.util.List;
    
    import com.fasterxml.jackson.annotation.JsonProperty;
    
    public class CatNode {
        @JsonProperty("n")
        private String name;
        @JsonProperty("u")
        private String url;
        @JsonProperty("i")
        private List<?> item;
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        public String getUrl() {
            return url;
        }
        public void setUrl(String url) {
            this.url = url;
        }
        public List<?> getItem() {
            return item;
        }
        public void setItem(List<?> item) {
            this.item = item;
        }
    }
    
    

    CatResult.java

    package com.foreknow.rest.pojo;
    
    import java.util.List;
    
    public class CatResult {
        private List<?> data;
    
        public List<?> getData() {
            return data;
        }
    
        public void setData(List<?> data) {
            this.data = data;
        }
    }
    
    

    然后 写出 com.foreknow.rest.service ItemCatService.java 接口

    package com.foreknow.rest.service;
    
    import java.util.List;
    
    import com.foreknow.rest.pojo.CatResult;
    
    public interface ItemCatService {
        /**
         * 前台分类(根节点Data)
         * @return
         */
        public CatResult getItemCatList();
        
        /**
         * 查询分类的列表
         */
        public List<?> getCatList(long parentId);
        
    }
    
    
    

    然后写 接口的实现类 com.foreknow.rest.service.impl包下 ItemCatServiceImpl.java

    package com.foreknow.rest.service.impl;
    
    import java.util.ArrayList;
    import java.util.List;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import com.foreknow.mapper.TbItemCatMapper;
    import com.foreknow.pojo.TbItemCat;
    import com.foreknow.pojo.TbItemCatExample;
    import com.foreknow.pojo.TbItemCatExample.Criteria;
    import com.foreknow.rest.pojo.CatNode;
    import com.foreknow.rest.pojo.CatResult;
    import com.foreknow.rest.service.ItemCatService;
    @Service
    public class ItemCatServiceImpl implements ItemCatService {
        @Autowired
        private TbItemCatMapper tbItemCatMapper;
        @Override
        public CatResult getItemCatList() {
            CatResult catResult = new CatResult();
            //查询分类的列表
            catResult.setData(getCatList(0));
            return catResult;
        }
        
        @Override
        public List<?> getCatList(long parentId) {
    //      把结果创建一个resultList  集合
            List resultList = new ArrayList<>();
            TbItemCatExample example = new TbItemCatExample();
            Criteria criteria = example.createCriteria();
    //      这个什么意思?
            criteria.andParentIdEqualTo(parentId);
            List<TbItemCat> list = tbItemCatMapper.selectByExample(example);
            for (TbItemCat tbItemCat : list) {
                //1.要判断是否为根节点
                if(tbItemCat.getIsParent()) {
                    CatNode catNode = new CatNode();
    //              data下面如果等于0  是第0个元素   那么我们就拼接   这个是第一级
                    if(parentId==0) {
                        catNode.setName("<a href='/products/"+tbItemCat.getId()+".html'>"+tbItemCat.getName()+"</a>");
                    }else {
    //                  二级节点    否则就能显示的名字  
                        catNode.setName(tbItemCat.getName());
                    }
                    catNode.setUrl("/products/"+tbItemCat.getId()+".html");   //u  拼接
    //              应该I 里面还有  N U I   我们用的是递归  自己调用自己
                    catNode.setItem(getCatList(tbItemCat.getId()));
                    resultList.add(catNode);
                }else {
                    //如果为子节点
                    resultList.add("/products/"+tbItemCat.getId()+".html|"+tbItemCat.getName());
                }
            }
            
            return resultList;
        }
    }
    
    

    最后写com.foreknow.rest.controller 控制器

    JsonController.java

    package com.foreknow.rest.controller;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.http.MediaType;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    
    import com.foreknow.common.util.JsonUtils;
    import com.foreknow.rest.pojo.CatResult;
    import com.foreknow.rest.service.ItemCatService;
    
    @Controller
    public class JsonController {
        @Autowired
        private ItemCatService itemCatService;
        /* 后面的参数表示返回的数据类型是json,字符编码是utf-8
         * 相当于是.response.setContentType("application/json;charset=UTF-8");
         */
        @RequestMapping(value="/itemcat/all", produces=MediaType.APPLICATION_JSON_VALUE + ";charset=utf-8")
        @ResponseBody
        public String getItemCatList(String callback) {
            //查询分类列表  调用service 层的查询方法json数据  前台分类(根节点Data)
            CatResult catResult = itemCatService.getItemCatList();
            
            //把pojo转换成一个字符串   //把对象转换成json数据   
            String json = JsonUtils.objectToJson(catResult);
            
            //拼装返回的字符串(js代码片段)  不能直接返回Json  这个callback= category.getDataservice 在lib-v1.js  包装起来
            String result = callback + "(" + json + ");";   
            return result;
        }
    }
    
    

    总结:rest里的流程 就是把json 数据获取并封装成一个JS脚本 因为为了跨域 让foreknow-protal能访问到 rest 里的数据

    在写foreknow-protal

    也一个跳到主页的控制器 com.foreknow.protal.controller

    PageController.java

    package com.foreknow.protal.controller;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    @Controller
    public class PageController {
        @RequestMapping("/index")
        public String showIndex() {
            return "index";
        }
    }
    

    总结:protal里的核心 在也JS lib-v1.js

    image.png

    1171行代码 找到服务器端口的127.0.0.1:8081 rest 里的Json数据

    还有就是 用ajax 发起的异步跨域请求

    image.png

    可以实现数据库和前框页面的动态处理 http://localhost:8082/

    image.png

    数据库

    image.png

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