springcloud系列三 搭建服务模块

搭建服务模块为了模拟正式开发环境,只是少写了service层直接在controller里面直接引用,直接上图和代码:更为方便:

创建完成之后加入配置:

pom.xml文件:

<?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>springcloud-parent</artifactId>
        <groupId>com.cxy</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <packaging>jar</packaging>
    <artifactId>spring-person</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <!--千万注意，不要写成spring-cloud-netflix-eureka-client，写成这样不会报错，但是注册不了服务-->
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.0.0</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.41</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.5</version>
                <dependencies>
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.5</version>
                    </dependency>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.41</version>
                    </dependency>
                </dependencies>
                <executions>
                    <execution>
                        <id>mybatis generator</id>
                        <phase>package</phase>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <!--允许移动生产的文件-->
                    <verbose>true</verbose>
                    <!--允许自动覆盖文件,在开发者不可以设置为true-->
                    <overwrite>true</overwrite>
                    <!--制定生产文件的位置-->
                    <configurationFile>
                        src/main/resources/mybatis_generator.xml
                    </configurationFile>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

这个插件中加入了自动生成代码插件:

mybatis_generator.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC
        "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
    <!--驱动包的路径-->
    <!--<classPathEntry location="F:maven
eposmysqlmysql-connector-java5.1.34mysql-connector-java-5.1.34.jar"/>-->
    <context id="DB2Tables" targetRuntime="MyBatis3">
        <!--注释-->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
            <property name="suppressDate" value="true"/>
        </commentGenerator>
        <!--数据库连接-->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://127.0.0.1:3306/fr_db?zeroDateTimeBehavior=convertToNull&amp;
　　　　　　　　　　　　　　　　　　　　　　　　autoReconnect=true&amp;useUnicode=true&amp;characterEncoding=utf-8"
                        userId="root"
                        password="1234"/>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!--生成Model类存放位置-->
        <javaModelGenerator targetPackage="com.cxy.dataObject" targetProject="src/main/java">
            <!--是否对model添加构造函数-->
            <property name="constructorBased" value="false"/>
            <!--是否允许子包-->
            <property name="enableSubPackages" value="true"/>
            <!--建立的model对象是否不可变，也就是生成的model没有setter方法-->
            <property name="immutable" value="false"/>
            <property name="trimStrings" value="false"/>
        </javaModelGenerator>

        <!--生成映射文件存放位置-->
        <sqlMapGenerator targetPackage="mapping" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!--生成Mapper类存放位置-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.cxy.dao" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!--生成与表对应的类名-->
        <table tableName="person" domainObjectName="PersonDo" enableCountByExample="false"
               enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false" selectByExampleQueryId="false"></table>

    </context>

</generatorConfiguration>

yml文件:

eureka:
  client:
    serviceUrl:
     defaultZone: http://127.0.0.1:8761/eureka/  #eureka注册中心地址
spring:
  application:
    name: cxy-person-service #应用名
 #datasource,数据连接
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url : jdbc:mysql://127.0.0.1:3306/fr_db?zeroDateTimeBehavior=convertToNull&autoReconnect=true&useUnicode=true&characterEncoding=utf-8
    password: 1234
    username: root
 #mybatis
mybatis:
    type-aliases-package: com.cxy.dataObject #实体类映射文件包
    mapper-locations: classpath:mapping/*.xml #生成的sql语句
server:
  port: 8081

笔者在这个文件配置时候出现很多问题,慢慢的解决了,

注意yml文件格式

启动类:

package com.cxy;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

/***
 * @ClassName: PersonApplication
 * @Description:
 * @Auther: 陈绪友
 * @Date: 2019/1/2816:30
 * @version : V1.0
 */
@SpringBootApplication
@EnableEurekaClient  //开启注解，注册服务
@MapperScan("com.cxy.dao")
public class PersonApplication {
    public static void main(String[] args) {
        SpringApplication.run(PersonApplication.class,args);
    }
}

controller

package com.cxy.controller;

import com.cxy.dao.PersonDoMapper;
import com.cxy.dataObject.PersonDo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/***
 * @ClassName: PersonController
 * @Description:
 * @Auther: 陈绪友
 * @Date: 2019/1/2816:31
 * @version : V1.0
 */
@RequestMapping("/person")
@RestController
public class PersonController {
    @Autowired
    private PersonDoMapper personDoMapper;

    @RequestMapping(value = "{id}",method = RequestMethod.GET) 

　　public PersonDo selectPersonDoByid(@PathVariable Integer id){ 

　　　　return personDoMapper.selectByPrimaryKey(id); } 
　　@RequestMapping(value = "{id}",method = RequestMethod.DELETE) 

　　public Integer deletePersonDoByid(@PathVariable Integer id){ 

　　　　return personDoMapper.deleteByPrimaryKey(id); } }

dao

package com.cxy.dao;

import com.cxy.dataObject.PersonDo;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface PersonDoMapper {
    int deleteByPrimaryKey(Integer id);

    int insert(PersonDo record);

    int insertSelective(PersonDo record);

    PersonDo selectByPrimaryKey(Integer id);

    int updateByPrimaryKeySelective(PersonDo record);

    int updateByPrimaryKey(PersonDo record);
}

pojo:个人喜欢叫做数据库数据模型,在正式开发中和这个是不可以直接返回给前端的,是需要进行封装给前端的

po,对应的数据库数据模型

dto 返回给前端的数据模型,即就是页面展示的模型

vo 是前端传输过来给后台的模型

package com.cxy.dataObject;

public class PersonDo {
    private Integer id;

    private String name;

    private Integer age;

    private String address;

    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;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }
}

xml.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.cxy.dao.PersonDoMapper">
  <resultMap id="BaseResultMap" type="com.cxy.dataObject.PersonDo">
    <id column="id" jdbcType="INTEGER" property="id" />
    <result column="name" jdbcType="VARCHAR" property="name" />
    <result column="age" jdbcType="INTEGER" property="age" />
    <result column="address" jdbcType="VARCHAR" property="address" />
  </resultMap>
  <sql id="Base_Column_List">
    id, name, age, address
  </sql>
  <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
    select 
    <include refid="Base_Column_List" />
    from person
    where id = #{id,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
    delete from person
    where id = #{id,jdbcType=INTEGER}
  </delete>
  <insert id="insert" parameterType="com.cxy.dataObject.PersonDo">
    insert into person (id, name, age, 
      address)
    values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{age,jdbcType=INTEGER}, 
      #{address,jdbcType=VARCHAR})
  </insert>
  <insert id="insertSelective" parameterType="com.cxy.dataObject.PersonDo">
    insert into person
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="id != null">
        id,
      </if>
      <if test="name != null">
        name,
      </if>
      <if test="age != null">
        age,
      </if>
      <if test="address != null">
        address,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="id != null">
        #{id,jdbcType=INTEGER},
      </if>
      <if test="name != null">
        #{name,jdbcType=VARCHAR},
      </if>
      <if test="age != null">
        #{age,jdbcType=INTEGER},
      </if>
      <if test="address != null">
        #{address,jdbcType=VARCHAR},
      </if>
    </trim>
  </insert>
  <update id="updateByPrimaryKeySelective" parameterType="com.cxy.dataObject.PersonDo">
    update person
    <set>
      <if test="name != null">
        name = #{name,jdbcType=VARCHAR},
      </if>
      <if test="age != null">
        age = #{age,jdbcType=INTEGER},
      </if>
      <if test="address != null">
        address = #{address,jdbcType=VARCHAR},
      </if>
    </set>
    where id = #{id,jdbcType=INTEGER}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.cxy.dataObject.PersonDo">
    update person
    set name = #{name,jdbcType=VARCHAR},
      age = #{age,jdbcType=INTEGER},
      address = #{address,jdbcType=VARCHAR}
    where id = #{id,jdbcType=INTEGER}
  </update>
</mapper>

这个是代码生成命令的截图

启动服务:

进入注册中心查看:

在此服务注册就完成了,那么远程是如何进行调用的呢,下接将会整合opnfeign进行服务调用,当然传统的httpclient,restemplate都是可以进行服务调用的

传统的方法就不调用了,比较繁琐,