《Spring Boot极简教程》 第6章 Springboot数据库集成

2019年5月22日 73次阅读 来源: 一个会写诗的程序员

第6章 Spring Boot数据库层集成

6.1 Spring Boot集成mybatis

在SpringBoot集成MyBatis时，我们将去掉和Mybatis配置相关的xml文件配置方式，用注解和属性配置来代替这些繁杂的配置。

本节我们使用SpringBoot集成Mybatis开发一个简易的H5性能测试的Web后台。我们采用Java，Groovy混合编程的方式。

新建gradle工程

《《Spring Boot极简教程》 第6章 Springboot数据库集成》
《《Spring Boot极简教程》 第6章 Springboot数据库集成》

组织工程目录结构如下

.
├── build.gradle
├── settings.gradle
└── src
    ├── main
    │   ├── groovy
    │   ├── java
    │   └── resources
    │       └── application.yml
    └── test
        ├── groovy
        ├── java
        └── resources

9 directories, 3 files

配置build.gradle

添加mybatis-spring-boot-starter依赖

compile('org.mybatis.spring.boot:mybatis-spring-boot-starter:1.1.1')

该starter将会自动配置好Spring Boot集成mybatis需要的mybatis,mybatis-spring等所有依赖。这个starter的依赖树如下图所示：

《《Spring Boot极简教程》 第6章 Springboot数据库集成》

其中，mybatis-spring-boot-autoconfigure会完成我们之前使用xml配置mybatis使用的sqlmap-config.xml类似如下配置：

<?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>
    <settings>
        <setting name="lazyLoadingEnabled" value="false"></setting>
    </settings>
</configuration>

和data-source.xml文件配置数据源dataSource和TransactionManager，

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

        <!-- 数据源定义 -->
       <bean id="dataSource"
          class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName">
            <value>com.mysql.jdbc.Driver</value>
        </property>
        <property name="url">
            <value>jdbc:mysql://127.0.0.1:3306/h5perf?useUnicode=true&autoReconnect=true&characterEncoding=UTF8&zeroDateTimeBehavior=convertToNull</value>
        </property>
        <property name="username">
            <value>root</value>
        </property>
        <property name="password">
            <value>root</value>
        </property>
    </bean>


    <!-- TransactionManager定义。 -->
    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <bean id="transactionTemplate"
          class="org.springframework.transaction.support.TransactionTemplate">
        <property name="transactionManager" ref="transactionManager"/>
    </bean>


    <!-- 通过aop定义事务增强切面 -->
    <aop:config>
        <aop:pointcut id="serviceMethod" expression="execution(* com.easy.springboot.h5perf.service.*.*(..))"/>
        <aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice"/>
    </aop:config>
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="find*" read-only="false"/>
            <tx:method name="save*" rollback-for="Exception"/>
            <tx:method name="new*" rollback-for="Exception"/>
            <tx:method name="update*" rollback-for="Exception"/>
            <tx:method name="*" rollback-for="Exception"/>
        </tx:attributes>
    </tx:advice>

    <!-- MyBatis配置sqlSessionFactory, SQL Map -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!-- 自动扫描entity目录 -->
        <property name="typeAliasesPackage" value="com.easy.springboot.h5perf.model"/>
        <!-- 显式指定Mapper文件位置 -->
        <property name="mapperLocations"
                  value="classpath:/sqlmap/*Mapper.xml"/>
        <property name="configLocation" value="classpath:sqlmap-config.xml"></property>
    </bean>
    <!-- 扫描basePackage下所有以@MyBatisRepository标识的 接口 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"
          p:basePackage="com.alibaba.swork.info.common.mapper"/>

</beans>

配置application.yml

配置数据源

spring:
    datasource:
        name: h5perf
        url: jdbc:mysql://localhost:3306/h5perf?autoReconnect=true&useSSL=false
        username: root
        password: root
        # 使用druid数据源
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver

配置mybatis

mybatis:
    type-aliases-package: com.easy.springboot.h5perf.model
    configuration:
        # 开启mybatis开启数据库字段自动映射驼峰命名规则java属性
        map-underscore-to-camel-case: true
        default-fetch-size: 100
        default-statement-timeout: 30

数据库表结构

CREATE DATABASE IF NOT EXISTS `h5perf`
  DEFAULT CHARACTER SET utf8;
USE `h5perf`;

DROP TABLE IF EXISTS `test_case`;

CREATE TABLE `test_case` (
  `id`             INT(11) NOT NULL AUTO_INCREMENT,
  `container_type` VARCHAR(45)      DEFAULT NULL
  COMMENT '‘ORIGIN_WEBVIEW’,’UC_WEBVIEW’',
  `test_url`       VARCHAR(45)      DEFAULT NULL,
  `net_type`       VARCHAR(45)      DEFAULT NULL
  COMMENT '‘WIFI’,‘3G’,‘4G’',
  `gmt_created`    DATETIME         DEFAULT NULL,
  `gmt_modified`   DATETIME         DEFAULT NULL,
  PRIMARY KEY (`id`)
)
  ENGINE = InnoDB
  DEFAULT CHARSET = utf8;


DROP TABLE IF EXISTS `test_resource`;

CREATE TABLE `test_resource` (
  `id`            INT(11) NOT NULL AUTO_INCREMENT,
  `test_case_id`  INT(11)          DEFAULT NULL,
  `start_time`    BIGINT(11)       DEFAULT NULL,
  `resource_url`  VARCHAR(500)     DEFAULT NULL,
  `resource_type` VARCHAR(45)      DEFAULT NULL
  COMMENT 'IMG,JS,CSS,OTHER',
  `resource_time` BIGINT(11)       DEFAULT NULL
  COMMENT 'onLoadResource资源时间戳',
  `resource_size` BIGINT(11)       DEFAULT NULL
  COMMENT '资源大小',
  `gmt_created`   DATETIME         DEFAULT NULL,
  PRIMARY KEY (`id`)
)
  ENGINE = InnoDB
  DEFAULT CHARSET = utf8;


DROP TABLE IF EXISTS `test_time_data`;

CREATE TABLE `test_time_data` (
  `id`               INT(11) NOT NULL AUTO_INCREMENT,
  `test_case_id`     INT(11)          DEFAULT NULL,
  `on_recieve_title` VARCHAR(45)      DEFAULT NULL
  COMMENT '近似白屏时间',
  `on_page_finished` VARCHAR(45)      DEFAULT NULL
  COMMENT '页面加载完成时间',
  `dom_content_load` VARCHAR(45)      DEFAULT NULL
  COMMENT 'dom内容加载完成时间',
  `load`             VARCHAR(45)      DEFAULT NULL
  COMMENT '资源加载完成时间',
  `gmt_created`      DATETIME         DEFAULT NULL,
  PRIMARY KEY (`id`)
)
  ENGINE = InnoDB
  DEFAULT CHARSET = utf8;

Model层代码

我们在application.yml中开启了mybatis开启数据库字段自动映射驼峰命名规则java属性：

map-underscore-to-camel-case: true

所以，我们model类的属性命名规则按照驼峰命名规则。

TestCase.groovy代码：

package com.easy.springboot.h5perf.model

/**
 * Created by jack on 2017/4/22.
 */
class TestCase {
    Integer id
    String containerType
    String testUrl
    String netType
    Date gmtCreated
    Date gmtModified

    @Override
    String toString() {
        return "TestCase{" +
                "id=" + id +
                ", containerType='" + containerType + '\'' +
                ", testUrl='" + testUrl + '\'' +
                ", netType='" + netType + '\'' +
                ", gmtCreated=" + gmtCreated +
                ", gmtModified=" + gmtModified +
                '}';
    }
}

Mapper接口层代码

我们以往的通过xml配置显式指定Mapper文件位置:

<!-- 显式指定Mapper文件位置 -->
        <property name="mapperLocations"
                  value="classpath:/sqlmap/*Mapper.xml"/>

我们现在用注解方式，直接在接口上添加@Mapper注解即可。代码示例TestCaseMapper.groovy

package com.easy.springboot.h5perf.mapper

import com.easy.springboot.h5perf.model.TestCase
import org.apache.ibatis.annotations.Insert
import org.apache.ibatis.annotations.Mapper
import org.apache.ibatis.annotations.Options
import org.apache.ibatis.annotations.Param
import org.apache.ibatis.annotations.Select

@Mapper
interface TestCaseMapper {

    @Insert([
            "insert into test_case",
            "set container_type = #{t.containerType},",
            "test_url = #{t.testUrl},",
            "net_type = #{t.netType},",
            "gmt_created = #{t.gmtCreated},",
            "gmt_modified = #{t.gmtModified}"
    ])
    @Options(useGeneratedKeys = true, keyProperty = "t.id")
    int insert(@Param("t") TestCase testCase)

    @Select("select * from test_case")
    List<TestCase> findAll()

    @Select("select * from test_case where net_type=#{netType}")
    List<TestCase> findByNetType(@Param(value="netType")String netType)

    @Select("select * from test_case where id=#{id} limit 1")
    TestCase findOne(@Param(value="id")Integer id)

    int insertSelective(TestCase record)
}

Controller层代码

package com.easy.springboot.h5perf.controller

import com.easy.springboot.h5perf.model.TestCase
import com.easy.springboot.h5perf.result.Result
import com.easy.springboot.h5perf.service.TestCaseService
import com.github.pagehelper.PageInfo
import groovy.json.JsonOutput
import io.swagger.annotations.Api
import io.swagger.annotations.ApiImplicitParam
import io.swagger.annotations.ApiOperation
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.stereotype.Controller
import org.springframework.ui.Model
import org.springframework.web.bind.annotation.GetMapping
import org.springframework.web.bind.annotation.PostMapping
import org.springframework.web.bind.annotation.RequestParam
import org.springframework.web.bind.annotation.ResponseBody

/**
 * Created by jack on 2017/4/22.
 * http://springfox.github.io/springfox/docs/current/#springfox-samples
 */

//在Controller上使用@Api会生成这个Controller的整体描述
@Api(value = "测试任务管理", tags = ["测试任务管理API"], description = "描述信息")
@Controller
class TestCaseController {
    @Autowired
    TestCaseService testCaseService

    @PostMapping("/saveTestCase")
    @ResponseBody
    def saveTestCase(TestCase testCase) {
        testCase.gmtCreated = new Date()
        println("testCase===" + testCase)
        int insert = testCaseService.save(testCase)
        println("testCase===" + testCase)
        Result result = new Result()
        if (insert == 1) {
            result.success = true
            result.result = testCase
        } else {
            result.success = false
            result.result = testCase
        }
        def jsonOutput = new JsonOutput()
        println("saveTestCase result===" + jsonOutput.toJson(result))
        result
    }

    @GetMapping("/listTestCase")
    def listTestCase(Model model,
                     @RequestParam(value = "pageNo", required = false) Integer pageNo,
                     @RequestParam(value = "pageSize", required = false) Integer pageSize) {
        def pageInfo = testCaseService.findAll(pageNo, pageSize)
        model.addAttribute("testCaseList", pageInfo.list)
        model.addAttribute("pageNo", pageInfo.pageNum)
        model.addAttribute("totalPage", pageInfo.pages)
        model.addAttribute("prePage", pageInfo.prePage)
        model.addAttribute("nextPage", pageInfo.nextPage)
        model.addAttribute("hasPreviousPage", pageInfo.hasPreviousPage)
        model.addAttribute("hasNextPage", pageInfo.hasNextPage)

        "/test_case/list"
    }

//    在具体方法上使用@ApiOperation可以生成接口的描述
    @ApiOperation(value = "list all TestCase Json", notes = "listTestCaseJson", produces = "application/json")
    @GetMapping("/listTestCaseJson")
    @ResponseBody
    def listTestCaseJson(@RequestParam(value = "pageNo", required = false) Integer pageNo,
                         @RequestParam(value = "pageSize", required = false) Integer pageSize) {
        testCaseService.findAll(pageNo, pageSize)
    }

    @ApiOperation(value = "findOne TestCase Json", notes = "findOne TestCase", produces = "application/json")
//  在方法上使用@ApiImplicitParam可以增加对参数等的描述
    @ApiImplicitParam(name = "id",
            value = "测试任务ID",
            dataType = "Integer",//This can be the class name or a primitive
            required = true,
            paramType = "query")
//Valid values are {@code path}, {@code query}, {@code body}, {@code header} or {@code form}
    @GetMapping("/findOne")
    @ResponseBody
    def findOne(@RequestParam(value = "id", required = true) Integer id) {
        testCaseService.findOne(id)
    }

    @ApiOperation(value = "findByNetType TestCase Json", notes = "findByNetType TestCase", produces = "application/json")
//  在方法上使用@ApiImplicitParam可以增加对参数等的描述
    @ApiImplicitParam(name = "netType",
            value = "findByNetType",
            dataType = "String",//This can be the class name or a primitive
            required = true,
            paramType = "query")
    @GetMapping("/findByNetType")
    @ResponseBody
    def findByNetType(@RequestParam(value = "netType", required = false) String netType,
                      @RequestParam(value = "pageNo", required = false) Integer pageNo,
                      @RequestParam(value = "pageSize", required = false) Integer pageSize
    ) {
        testCaseService.queryByPage(netType, pageNo, pageSize)
    }


}

使用PageHelper实现后端分页

（1）添加pagehelper-spring-boot-starter

//   pagehelper
    compile('com.github.pagehelper:pagehelper-spring-boot-starter:1.1.0')

（2）Service层代码实现

接口类 TestCaseService.groovy

package com.easy.springboot.h5perf.service

import com.easy.springboot.h5perf.model.TestCase
import com.github.pagehelper.PageInfo

/**
 * Created by jack on 2017/4/23.
 */
interface TestCaseService {
    def save(TestCase testCase)

    PageInfo<TestCase> findAll(Integer pageNo, Integer pageSize)

    TestCase findOne(Integer id)

    PageInfo<TestCase> queryByPage(String netType, Integer pageNo, Integer pageSize)

}

实现类TestCaseServiceImpl.groovy

package com.easy.springboot.h5perf.service

import com.easy.springboot.h5perf.mapper.TestCaseMapper
import com.easy.springboot.h5perf.model.TestCase
import com.github.pagehelper.PageHelper
import com.github.pagehelper.PageInfo
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.stereotype.Service

/**
 * Created by jack on 2017/4/23.
 */
@Service
class TestCaseServiceImpl implements TestCaseService {
    @Autowired
    TestCaseMapper testCaseMapper;

    @Override
    def save(TestCase testCase) {
        testCaseMapper.insert(testCase)
    }

    @Override
    PageInfo<TestCase> findAll(Integer pageNo, Integer pageSize) {
        pageNo = pageNo == null ? 1 : pageNo
        pageSize = pageSize == null ? 10 : pageSize
        PageHelper.startPage(pageNo, pageSize)
        List<TestCase> testCaseList = testCaseMapper.findAll()
        //用PageInfo对结果进行包装
        PageInfo<TestCase> testCasePageInfo = new PageInfo<>(testCaseList)
        testCasePageInfo

    }

    @Override
    TestCase findOne(Integer id) {
        testCaseMapper.findOne(id)
    }

    @Override
    PageInfo<TestCase> queryByPage(String netType, Integer pageNo, Integer pageSize) {
        pageNo = pageNo == null ? 1 : pageNo
        pageSize = pageSize == null ? 10 : pageSize
        PageHelper.startPage(pageNo, pageSize)

        List<TestCase> testCaseList = testCaseMapper.findByNetType(netType)
        //用PageInfo对结果进行包装
        PageInfo<TestCase> testCasePageInfo = new PageInfo<>(testCaseList)
        testCasePageInfo
    }
}

（3）Controller层与前端代码集成

传到前端的Model层数据：

    @GetMapping("/listTestCase")
    def listTestCase(Model model,
                     @RequestParam(value = "pageNo", required = false) Integer pageNo,
                     @RequestParam(value = "pageSize", required = false) Integer pageSize) {
        def pageInfo = testCaseService.findAll(pageNo, pageSize)
        model.addAttribute("testCaseList", pageInfo.list)
        model.addAttribute("pageNo", pageInfo.pageNum)
        model.addAttribute("totalPage", pageInfo.pages)
        model.addAttribute("prePage", pageInfo.prePage)
        model.addAttribute("nextPage", pageInfo.nextPage)
        model.addAttribute("hasPreviousPage", pageInfo.hasPreviousPage)
        model.addAttribute("hasNextPage", pageInfo.hasNextPage)

        "/test_case/list"
    }

前端使用Bootstrap pagination样式类：

    <table class="table table-hover">
        <thead>
        <th>Id</th>
        <th>testUrl</th>
        <th>containerType</th>
        <th>netType</th>
        <th>gmtCreated</th>
        </thead>
        <tbody>
        <#list testCaseList as tc >
        <tr>
            <td>${tc.id}</td>
            <td><a href="${tc.testUrl}">${tc.testUrl}</a></td>
            <td>${tc.containerType}</td>
            <td>${tc.netType}</td>
            <td>${tc.gmtCreated?string('yyyy/MM/dd HH:mm:ss')}</td>
        </tr>
        </#list>
        </tbody>
    </table>


    <div class="center">
        <ul class="pagination">
            <li><a href="/listTestCase?pageNo=${prePage}&pageSize=10">&laquo;</a></li>
        <#list 1..totalPage as index>
            <#if index=pageNo>
                <li class="active"><a href="/listTestCase?pageNo=${index}&pageSize=10">${index}</a></li>
            <#else>
                <li><a href="/listTestCase?pageNo=${index}&pageSize=10">${index}</a></li>
            </#if>
        </#list>
            <li><a href="/listTestCase?pageNo=${nextPage}&pageSize=10">&raquo;</a></li>
        </ul>
    </div>

（4）运行测试

《《Spring Boot极简教程》 第6章 Springboot数据库集成》 第1页
《《Spring Boot极简教程》 第6章 Springboot数据库集成》 第2页

集成Druid对数据库进行监控

本节完整的工程源代码：https://github.com/EasySpringBoot/h5perf

6.2 Spring Boot集成jpa

6.3 Spring Boot集成多数据源

参考资料：

1.http://www.mybatis.org/spring-boot-starter/mybatis-spring-boot-autoconfigure/
2.https://github.com/Jason-Chen-2017/MyBatis-Spring-Boot
3.https://github.com/Jason-Chen-2017/pagehelper-spring-boot

    原文作者：一个会写诗的程序员
    原文地址: https://www.jianshu.com/p/1e02a74db3d0
    本文转自网络文章，转载此文章仅为分享知识，如有侵权，请联系博主进行删除。
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