spring cloud config--client

概述

之前我们简单的搭建了一个单点的config-server服务，实现配置文件的统一管理，本次文章将实现config-client是如何从config-server中获取到统一配置文件信息的

1.创建springcloud--ssmServer服务

此服务是之前的springBoot继承了mybatis和springMvc等框架的完整项目，这里用来当做config-client，模仿真实的环境

父项目pom.xml

<?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">
    <modelVersion>4.0.0</modelVersion>
    <!-- 父项目骨架 -->
    <groupId>com.pupeiyuan.springcloud</groupId>
    <artifactId>spring-Cloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>
    <!-- 包含的子项目 -->
    <modules>
        <module>springcloud-eureka</module>
        <module>springcloud-configServer</module>
        <module>springcloud-configClient</module>
        <module>springcloud-ssmServer</module>
    </modules>
    <!-- java版本信息 -->
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>
    <!-- springboot以来的父项目 -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.2.RELEASE</version>
    </parent>

    <dependencyManagement>
        <dependencies>
            <!-- springcloud版本依赖 -->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Dalston.SR3</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <!-- maven插件 -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

此项目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.pupeiyuan.springcloud</groupId>
        <artifactId>spring-Cloud</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <artifactId>springcloud-ssmServer</artifactId>

    <dependencies>
        <!-- 单元测试 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- 支持springWEB web支持: 1、web mvc; 2、restful; 3、jackjson支持; 4、aop ........ -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- AOP依赖模块 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.8.7</version>
        </dependency>
        <!-- jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- Mybatis -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!-- 通用Mapper -->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>RELEASE</version>
        </dependency>
        <!-- 分页助手 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.github.jsqlparser</groupId>
            <artifactId>jsqlparser</artifactId>
            <version>0.9.1</version>
        </dependency>

        <!-- mysql 数据库驱动. -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!-- 连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.9</version>
        </dependency>
        <!-- jstl -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>
        <!-- JSP相关 -->
        <dependency>
            <groupId>com.github.jsqlparser</groupId>
            <artifactId>jsqlparser</artifactId>
            <version>0.9.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>
        <!-- httpclient -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
            <scope>true</scope>
        </dependency>

        <!-- spring cloud -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <!-- java编译插件 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <!-- 这是spring boot devtool plugin -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <!--fork : 如果没有该项配置，肯呢个devtools不会起作用，即应用不会restart -->
                    <fork>true</fork>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

创建 bootstrap.properties

config文件中这里要创建bootstrap.properties或者bootstrap.yml，一些关于config的配置需要在这里配置，因为spring cloud默认从这个配置文件中读取config，其他的配置还可以从燕来的配置文件application.properties中来设置

spring.application.name=multiple #这里的名字对应的配置服务中的应用名称{application}
spring.cloud.config.discovery.enabled=true
spring.cloud.config.discovery.service-id=pringcloud-configServer #这里是config--server在eureka中注册的服务
spring.cloud.config.profile=test #这里名字对应环境的标识{profile}
spring.cloud.config.label=master

eureka.client.serviceUrl.defaultZone=http://root:123456@peer1:8000/eureka
eureka.instance.prefer-ip-address=true

MyBatisConfig.java

此配置文件是初始化datasource注册bean的

package com.pupeiyuan.config;

import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;
import com.github.pagehelper.PageHelper;
import com.pupeiyuan.core.DataSourceKey;
import com.pupeiyuan.core.DynamicRoutingDataSource;

import tk.mybatis.spring.annotation.MapperScan;
import tk.mybatis.spring.mapper.MapperScannerConfigurer;

@Configuration
@MapperScan("com.pupeiyuan.mapper")
public class MyBatisConfig {
      @Bean
        //此处的"multiple.datasource.master"需要你在application.properties中配置，详细信息看下面贴出的application.properties文件。
        @ConfigurationProperties(prefix = "multiple.datasource.master")
        public DataSource dbMaster() {
          DruidDataSource druidDataSource = DruidDataSourceBuilder.create().build();
          //配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
            try {
                druidDataSource.setFilters("stat,wall,log4j");
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            // 通过connectProperties属性来打开mergeSql功能；慢SQL记录
            druidDataSource.setConnectionProperties("druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000");
            //合并多个DruidDataSource的监控数据
            druidDataSource.setUseGlobalDataSourceStat(true);
            return druidDataSource;
        }

        @Bean
        @ConfigurationProperties(prefix = "multiple.datasource.slave")
        public DataSource dbSlave1() {
             DruidDataSource druidDataSource = DruidDataSourceBuilder.create().build();
              //配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
                try {
                    druidDataSource.setFilters("stat,wall,log4j");
                } catch (SQLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

                // 通过connectProperties属性来打开mergeSql功能；慢SQL记录
                druidDataSource.setConnectionProperties("druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000");
                //合并多个DruidDataSource的监控数据
                druidDataSource.setUseGlobalDataSourceStat(true);
                return druidDataSource;
        }
        /**
         * 核心动态数据源
         *
         * @return 数据源实例
         */
        @Bean
        public DataSource dynamicDataSource() {
            DynamicRoutingDataSource dataSource = new DynamicRoutingDataSource();
            dataSource.setDefaultTargetDataSource(dbMaster());
            Map<Object, Object> dataSourceMap = new HashMap<>(4);
            dataSourceMap.put(DataSourceKey.DB_MASTER, dbMaster());
            dataSourceMap.put(DataSourceKey.DB_SLAVE1, dbSlave1());
            dataSource.setTargetDataSources(dataSourceMap);
            return dataSource;
        }

        @Bean
        public SqlSessionFactory sqlSessionFactory() throws Exception {
            SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
            sqlSessionFactoryBean.setDataSource(dynamicDataSource());
            //此处设置为了解决找不到mapper文件的问题
            //sqlSessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));
            return sqlSessionFactoryBean.getObject();
        }
        @Bean
        public SqlSessionTemplate sqlSessionTemplate() throws Exception {
            return new SqlSessionTemplate(sqlSessionFactory());
        }
        /**
         * 事务管理
         *
         * @return 事务管理实例
         */
        @Bean
        public PlatformTransactionManager platformTransactionManager() {
            return new DataSourceTransactionManager(dynamicDataSource());
        }

}

2.下面我们在启动了config-server的前提下，启动此项目，看是否能获取到数据源信息，并成功装配到spring

这里测试没有问题，说明已经成功的从config-server中获取到了配置信息