[Java知识库]代码生成器快速搭建SSMP后台环境

准备

创建如下结构普通maven项目

AutoCodeGenerator.java
注意修改4个私有静态属性
author ：项目作者
first_level_package_name：项目的一级包名
second_level_package_name ：项目的二级包名
table_to_entity ：指定数据库中那些表要装换为实体类，表名间用英文逗号分隔，如果全部生成可用all

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.baomidou.mybatisplus.generator.FastAutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.OutputFile;
import com.baomidou.mybatisplus.generator.config.rules.DateType;

import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Properties;

public class AutoCodeGenerator {
    private static String author = "hao";
    private static String first_level_package_name = "com";
    private static String second_level_package_name = "hao";
    private static String table_to_entity = "all";

    public static void main(String[] args) throws IOException {
        InputStream inStream = AutoCodeGenerator.class.getClassLoader().getResourceAsStream("db.properties");
        Properties prop = new Properties();
        prop.load(inStream);
        String url = prop.getProperty("jdbc.url");
        String username = prop.getProperty("jdbc.username");
        String password = prop.getProperty("jdbc.password");
        // 数据库配置
        DataSourceConfig.Builder dataSourceConfigBuilder = new DataSourceConfig
                .Builder(url, username, password);
        FastAutoGenerator.create(dataSourceConfigBuilder)
                // 全局配置
                .globalConfig((scanner, builder) -> {
                    builder.author(author)
                            // 覆盖已生成文件
                            .fileOverride()
                            // 指定输出目录
                            .outputDir(System.getProperty("user.dir") + "/src/main/java/")
                            // 禁止打开输出目录
                            .disableOpenDir()
                            // 时间策略
                            .dateType(DateType.TIME_PACK)
                            // 类注释日期的格式
                            .commentDate("yyyy-MM-dd")
                            .build();
                })
                // 包配置
                .packageConfig((scanner, builder) -> {
                    // 父包名
                    builder.parent(first_level_package_name)
                            // 模块名
                            .moduleName(second_level_package_name)
                            // Entity 包名
                            .entity("entity")
                            // Service 包名
                            .service("service")
                            // Controller 包名
                            .controller("controller")
                            // Mapper 包名
                            .mapper("mapper")
                            // MapperXML 包名
                            .xml("mapper")
                            // 路径配置信息
                            .pathInfo(Collections.singletonMap(OutputFile.mapperXml, System.getProperty("user.dir") + "/src/main/resources/mapper"));
                })
                //策略配置
                .strategyConfig((scanner, builder) -> {
                    // 增加表匹配(内存过滤)，	include 与 exclude 只能配置一项
                    builder.addInclude(getTables(table_to_entity))
                            // 	增加表排除匹配(内存过滤)，	include 与 exclude 只能配置一项
                            // .addExclude(scanner.apply("请输入要忽略的表名，多个英文逗号分隔？"))
                            // 	增加过滤表后缀
                            .addTableSuffix("")
                            // 	增加过滤表前缀
                            .addTablePrefix("")
                            // service 策略配置
                            .serviceBuilder()
                            // 	格式化文件名称
                            .formatServiceFileName("%sService")
                            .formatServiceImplFileName("%sServiceImpl")
                            // 实体策略配置
                            .entityBuilder()
                            //AR模式
                            .enableActiveRecord()
                            // 开启生成实体时生成字段注解
                            .enableTableFieldAnnotation()
                            // controller 策略配置
                            .controllerBuilder()
                            .formatFileName("%sController")
                            // 开启生成@RestController 控制器
//                            .enableRestStyle()
                            // 	mapper 策略配置
                            .mapperBuilder()
                            // 设置父类
                            .superClass(BaseMapper.class)
                            .formatMapperFileName("%sMapper")
                            .enableMapperAnnotation()
                            .formatXmlFileName("%sMapper");
                })
                .execute();
    }

    /**
     * 处理 all 情况
     * 要生成的表名，以英文逗号分隔多个表格名(所有表填all)
     *
     * @param tables
     * @return
     */
    protected static List<String> getTables(String tables) {
        return "all".equals(tables) ? Collections.emptyList() : Arrays.asList(tables.split(","));
    }
}

applicationContext.xml
注意修改4个要注解扫描包的基址
com.hao.mapper
com.hao.service
com.hao.controller
com.hao.entity

<?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: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/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <context:property-placeholder location="classpath:db.properties"/>
    <context:component-scan base-package="com.hao.service,com.hao.controller"/>
    <mvc:annotation-driven/>
    <mvc:default-servlet-handler/>
    <!--===================spring-mapper.xml=====================-->
    <!--数据库连接池配置 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    <!--SqlSessionFactory-->
    <bean id="sqlSessionFactory" class="com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="typeAliasesPackage" value="com.hao.entity"/>
    </bean>

    <!--配置dao接口扫描包，动态的实现了Dao接口可以注入到Spring容器中-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注入sqlSessionFactory-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--要扫描的dao包-->
        <property name="basePackage" value="com.hao.mapper"/>
    </bean>
    <!--===================spring-mvc.xml========================-->
    <!--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>
    <!--===================spring-service.xml====================-->
    <!--声明式事务-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>
    </bean>
</beans>

db.properties
注意修改连接的数据库名，用户名以及密码

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/dingding?useSSL=false&useUnicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true&rewriteBatchedStatements=true
jdbc.username=root
jdbc.password=root

log4j.properties

log4j.rootLogger=debug, console

log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.Target=System.out
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d %5p %c - %m%n
log4j.logger.java.sql.Connection=debug
log4j.logger.java.sql.Statement=debug
log4j.logger.java.sql.PreparedStatement=debug 
log4j.logger.org.mybatis=debug

log4j.logger.org.myrobot.persist=debug 
log4j.logger.org.myrobot.dao=debug 
log4j.logger.org.myrobot.controller=debug 

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>

    <groupId>org.example</groupId>
    <artifactId>quickssmp-02</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.28</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.3</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>3.5.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.16</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.16</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.79</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.8</version>
        </dependency>
        <!--mybatis-plus代码生成器-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.5.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>2.3</version>
        </dependency>
        <!-- 日志相关 -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.7</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.7</version>
        </dependency>
    </dependencies>

    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>
</project>

运行AutoCodeGenerator

注意打开mysql服务

测试

import com.hao.entity.TUser;
import com.hao.mapper.TUserMapper;
import com.hao.service.impl.TUserServiceImpl;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

public class mytest {
    private ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
    private TUserServiceImpl service = context.getBean(TUserServiceImpl.class);
    private TUserMapper mapper = service.getBaseMapper();

    @Test
    public void test() {
        List<TUser> userInfos = mapper.selectList(null);
        for (TUser userInfo : userInfos) {
            System.out.println(userInfo);
        }
    }
}