idea+springboot2.0+maven+mybatis+mybatis generator自動生成程式碼
最近嘗試自己搭一主流的springboot框架,springboot全家桶相對於springmvc來說,少了很多的配置,並且內建tomcat,打包即可釋出,適合輕量級系統開發,一下是配置的具體的過程。
1、jdk1.8
2、填寫GroupId和ArtifactId:
groupid:是專案組織唯一的識別符號,對應著java包結構,是main裡面java的目錄結構
artifactid:對應著專案的名稱,是專案根目錄的鳴名稱
注:在後面pom檔案新增依賴時的標籤,就是這兩個。
jar、war的區別:jar包內專案編譯後的.class檔案,而war為包括.class,js,jsp,HTML等資源在內的專案壓縮包。
version:專案版本號,其中含義網上均可搜到。
3、新增依賴,顧名思義,選擇所需功能,自動新增至pom中進行下載,之後點選next即可完成。
4、基本結構如下圖
4.1專案啟動類(顧名思義,可見程式碼中有main方法,idea自動新增main方法的啟動項,可以進行啟動,這裡也是整個專案啟動的起點),如下需新增相應註解
package com.liujx.springboot_mybtis; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication //添加註解,對應專案中mapper(dao)的包路徑 @MapperScan("com.liujx.springboot_maybtis.dao") public class SpringbootMybtisApplication { public static void main(String[] args) { SpringApplication.run(SpringbootMybtisApplication.class, args); } }
4.2 application.yml
為配置簡潔,刪掉了初始生成的application.properties檔案,建立此檔案(為專案啟動時所載入的配置表,包括系統屬性,環境變數,命令引數等)。
server: port: 8080 spring: datasource: name: mysql_test type: com.alibaba.druid.pool.DruidDataSource #druid相關配置 druid: #監控統計攔截的filters filters: stat driver-class-name: com.mysql.jdbc.Driver #基本屬性 url: jdbc:mysql://192.168.1.239/test?useSSL=false&allowMultiQueries=true username: root password: root #配置初始化大小/最小/最大 initial-size: 1 min-idle: 1 max-active: 20 #獲取連線等待超時時間 max-wait: 60000 #間隔多久進行一次檢測,檢測需要關閉的空閒連線 time-between-eviction-runs-millis: 60000 #一個連線在池中最小生存的時間 min-evictable-idle-time-millis: 300000 validation-query: SELECT 'x' test-while-idle: true test-on-borrow: false test-on-return: false #開啟PSCache,並指定每個連線上PSCache的大小。oracle設為true,mysql設為false。分庫分表較多推薦設定為false pool-prepared-statements: false max-pool-prepared-statement-per-connection-size: 20 ## 該配置節點為獨立的節點,有很多同學容易將這個配置放在spring的節點下,導致配置無法被識別 mybatis: mapper-locations: classpath:mapper/*.xml #注意:一定要對應mapper對映xml檔案的所在路徑 type-aliases-package: com.winterchen.model # 注意:對應實體類的路徑 #pagehelper pagehelper: helperDialect: mysql reasonable: true supportMethodsArguments: true params: count=countSql returnPageInfo: check
4.3pom.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>
<groupId>com.liujx</groupId>
<artifactId>springboot_mybtis</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springboot_mybtis</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.4</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-joda</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-parameter-names</artifactId>
</dependency>
<!-- 分頁外掛 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.2.5</version>
</dependency>
<!-- alibaba的druid資料庫連線池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.9</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<!-- mybatis generator 自動生成程式碼外掛 -->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile>
<overwrite>true</overwrite>
<verbose>true</verbose>
</configuration>
</plugin>
</plugins>
</build>
</project>
4.4配置mybatis generator自動生成程式碼
注意點:
(1)資料庫驅動包:很多教程沒有註明此jar來源,其實無需去下載,根據名稱查詢,在pom.xml 中新增依賴即可,地址即依賴下載的地址。
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.30</version> </dependency>
(2)此工具需要生成dao層、modal(pojo實體)層、mapper.xml對映檔案,其路徑均在此處一一配置。
(3)配置需要生產的表單資訊。
<?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>
<!-- 資料庫驅動:選擇你的本地硬碟上面的資料庫驅動包-->
<classPathEntry location="C:\Users\Administrator\.m2\repository\mysql\mysql-connector-java\5.1.30\mysql-connector-java-5.1.30.jar"/>
<context id="DB2Tables" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressDate" value="true"/>
<!-- 是否去除自動生成的註釋 true:是 : false:否 -->
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!--資料庫連結URL,使用者名稱、密碼,test為連線地址下的資料庫名稱 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://192.168.1.239/test" userId="root" password="root">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- 生成模型的包名和位置-->
<javaModelGenerator targetPackage="com.liujx.springboot_mybtis.model" targetProject="src/main/java">
<property name="enableSubPackages" value="true"/>
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<!-- 生成對映檔案的包名和位置-->
<sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources">
<property name="enableSubPackages" value="true"/>
</sqlMapGenerator>
<!-- 生成DAO的包名和位置-->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.liujx.springboot_mybtis.dao" targetProject="src/main/java">
<property name="enableSubPackages" value="true"/>
</javaClientGenerator>
<!-- 要生成的表 tableName是資料庫中的表名或檢視名 domainObjectName是實體類名-->
<table tableName="tb_sys_user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>
</context>
</generatorConfiguration>
4.5自動生成程式碼
(1)點選run-Edit Configurations
(2)新增配置後執行