轉載請表明出處 https://blog.csdn.net/Amor_Leo/article/details/85020754 謝謝

Springboot2.1+mysql8+MybatisPlus3.0.6+druid整合

• 匯入依賴
• 編寫yml
• 編寫配置類
• druid配置
• mybatisplus分頁配置
• 實體類要邏輯刪除的欄位上新增
• 啟動類
• Dao層
• mybatisplus 程式碼生成器 ([官網](https://mp.baomidou.com/guide/generator.html))

匯入依賴

	<dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.0.6</version>
        </dependency>
 

編寫yml

spring: 
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url:  jdbc:mysql://localhost:3306/Label?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=UTC    #mysql8
    username: root
    password: root
    name: test
    type: com.alibaba.druid.pool.DruidDataSource
    initial-size
 
: 5
    min-idle: 5
    max-active: 20
    max-wait: 30000
    time-between-eviction-runs-millis: 60000
    min-evictable-idle-time-millis: 300000
    validation-query: select '1' from dual
    test-while-idle: true
    test-on-borrow: false
    test-on-return: false
    pool-prepared-statements: true
    max-open-prepared-statements: 20
    max-pool-prepared-statement-per-connection-size: 20
#    filters: stat,wall,log4j
mybatis-plus:
  mapper-locations: classpath*:mapper/*.xml
  type-aliases-package: com.amor.base.domain  #掃描實體類,配置xml的別名
  configuration:
    # 這個配置會將執行的sql打印出來，在開發或測試的時候可以用
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  global-config:
    db-config:
      #邏輯刪除配置
      logic-not-delete-value: 1 #刪除前
      logic-delete-value: 0  #刪除後

編寫配置類

druid配置

@Configuration
public class DruidConfig {

    private static final Logger logger = LoggerFactory.getLogger(DruidConfig.class);

    private static final String DB_PREFIX = "spring.datasource";

    @Bean
    public ServletRegistrationBean<StatViewServlet> druidServlet() {
        logger.info("init Druid Servlet Configuration ");
        ServletRegistrationBean<StatViewServlet> servletRegistrationBean = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");
        // IP白名單
        servletRegistrationBean.addInitParameter("allow", "*");
        // IP黑名單(共同存在時，deny優先於allow)
        servletRegistrationBean.addInitParameter("deny", "192.168.1.100");
        //控制檯管理使用者
        servletRegistrationBean.addInitParameter("loginUsername", "admin");
        servletRegistrationBean.addInitParameter("loginPassword", "admin");
        //是否能夠重置資料 禁用HTML頁面上的“Reset All”功能
        servletRegistrationBean.addInitParameter("resetEnable", "false");
        return servletRegistrationBean;
    }

    @Bean
    public FilterRegistrationBean<WebStatFilter> filterRegistrationBean() {
        FilterRegistrationBean<WebStatFilter> filterRegistrationBean = new FilterRegistrationBean<>(new WebStatFilter());
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }

    /**
     * 解決 spring.datasource.filters=stat,wall,log4j 無法正常註冊進去
    * */
    @ConfigurationProperties(prefix = DB_PREFIX)
    class IDataSourceProperties {
        private String url;
        private String username;
        private String password;
        private String driverClassName;
        private int initialSize;
        private int minIdle;
        private int maxActive;
        private int maxWait;
        private int timeBetweenEvictionRunsMillis;
        private int minEvictableIdleTimeMillis;
        private String validationQuery;
        private boolean testWhileIdle;
        private boolean testOnBorrow;
        private boolean testOnReturn;
        private boolean poolPreparedStatements;
        private int maxPoolPreparedStatementPerConnectionSize;
        private String filters;
        private String connectionProperties;

        @Bean     //宣告其為Bean例項
        @Primary  //在同樣的DataSource中，首先使用被標註的DataSource
        public DataSource dataSource() {
            DruidDataSource datasource = new DruidDataSource();
            datasource.setUrl(url);
            datasource.setUsername(username);
            datasource.setPassword(password);
            datasource.setDriverClassName(driverClassName);

            //configuration
            datasource.setInitialSize(initialSize);
            datasource.setMinIdle(minIdle);
            datasource.setMaxActive(maxActive);
            datasource.setMaxWait(maxWait);
            datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
            datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
            datasource.setValidationQuery(validationQuery);
            datasource.setTestWhileIdle(testWhileIdle);
            datasource.setTestOnBorrow(testOnBorrow);
            datasource.setTestOnReturn(testOnReturn);
            datasource.setPoolPreparedStatements(poolPreparedStatements);
            datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
            try {
                datasource.setFilters(filters);
            } catch (SQLException e) {
                System.err.println("druid configuration initialization filter: " + e);
            }
            datasource.setConnectionProperties(connectionProperties);
            return datasource;
        }

        public String getUrl() {
            return url;
        }

        public void setUrl(String url) {
            this.url = url;
        }

        public String getUsername() {
            return username;
        }

        public void setUsername(String username) {
            this.username = username;
        }

        public String getPassword() {
            return password;
        }

        public void setPassword(String password) {
            this.password = password;
        }

        public String getDriverClassName() {
            return driverClassName;
        }

        public void setDriverClassName(String driverClassName) {
            this.driverClassName = driverClassName;
        }

        public int getInitialSize() {
            return initialSize;
        }

        public void setInitialSize(int initialSize) {
            this.initialSize = initialSize;
        }

        public int getMinIdle() {
            return minIdle;
        }

        public void setMinIdle(int minIdle) {
            this.minIdle = minIdle;
        }

        public int getMaxActive() {
            return maxActive;
        }

        public void setMaxActive(int maxActive) {
            this.maxActive = maxActive;
        }

        public int getMaxWait() {
            return maxWait;
        }

        public void setMaxWait(int maxWait) {
            this.maxWait = maxWait;
        }

        public int getTimeBetweenEvictionRunsMillis() {
            return timeBetweenEvictionRunsMillis;
        }

        public void setTimeBetweenEvictionRunsMillis(int timeBetweenEvictionRunsMillis) {
            this.timeBetweenEvictionRunsMillis = timeBetweenEvictionRunsMillis;
        }

        public int getMinEvictableIdleTimeMillis() {
            return minEvictableIdleTimeMillis;
        }

        public void setMinEvictableIdleTimeMillis(int minEvictableIdleTimeMillis) {
            this.minEvictableIdleTimeMillis = minEvictableIdleTimeMillis;
        }

        public String getValidationQuery() {
            return validationQuery;
        }

        public void setValidationQuery(String validationQuery) {
            this.validationQuery = validationQuery;
        }

        public boolean isTestWhileIdle() {
            return testWhileIdle;
        }

        public void setTestWhileIdle(boolean testWhileIdle) {
            this.testWhileIdle = testWhileIdle;
        }

        public boolean isTestOnBorrow() {
            return testOnBorrow;
        }

        public void setTestOnBorrow(boolean testOnBorrow) {
            this.testOnBorrow = testOnBorrow;
        }

        public boolean isTestOnReturn() {
            return testOnReturn;
        }

        public void setTestOnReturn(boolean testOnReturn) {
            this.testOnReturn = testOnReturn;
        }

        public boolean isPoolPreparedStatements() {
            return poolPreparedStatements;
        }

        public void setPoolPreparedStatements(boolean poolPreparedStatements) {
            this.poolPreparedStatements = poolPreparedStatements;
        }

        public int getMaxPoolPreparedStatementPerConnectionSize() {
            return maxPoolPreparedStatementPerConnectionSize;
        }

        public void setMaxPoolPreparedStatementPerConnectionSize(int maxPoolPreparedStatementPerConnectionSize) {
            this.maxPoolPreparedStatementPerConnectionSize = maxPoolPreparedStatementPerConnectionSize;
        }

        public String getFilters() {
            return filters;
        }

        public void setFilters(String filters) {
            this.filters = filters;
        }

        public String getConnectionProperties() {
            return connectionProperties;
        }

        public void setConnectionProperties(String connectionProperties) {
            this.connectionProperties = connectionProperties;
        }
    }
}

mybatisplus分頁配置

@EnableTransactionManagement
@Configuration
@MapperScan("com.amor.base.mapper")  //dao包
public class MybatisPlusConfig {
     /**
     * 邏輯刪除 
     * */
    @Bean
    public ISqlInjector sqlInjector(){
        return new LogicSqlInjector();
    }
    /**
     * 分頁外掛
     */
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        return new PaginationInterceptor();
    }
}

實體類要邏輯刪除的欄位上新增

    /**
     * 狀態
    * */
    @TableLogic  //邏輯刪除   查詢時會自動帶上   WHERE state='1'
    private String state;

啟動類

@SpringBootApplication
@MapperScan("com.baomidou.mybatisplus.samples.quickstart.mapper")

Dao層

//  繼承 BaseMapper<T> 
@Repository
public interface LabelMapper extends BaseMapper<Label> {

}

mybatisplus 程式碼生成器 (官網)

public class CodeGenerator {

    /**
     * velocity 模板引擎, 預設
     * <dependency>
     *     <groupId>org.apache.velocity</groupId>
     *     <artifactId>velocity-engine-core</artifactId>
     *     <version>最新版本</version>
     * </dependency>
     *
     * // 切換為 freemarker 模板引擎
     * mpg.setTemplateEngine(new FreemarkerTemplateEngine());
     *  freemarker 模板引擎
     * <dependency>
     *     <groupId>org.freemarker</groupId>
     *     <artifactId>freemarker</artifactId>
     *     <version>最新版本</version>
     * </dependency>
    */

    /**
     * <p>
     * 讀取控制檯內容
     * </p>
     */
    public static String scanner(String tip) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder help = new StringBuilder();
        help.append("請輸入" + tip + "：");
        System.out.println(help.toString());
        if (scanner.hasNext()) {
            String ipt = scanner.next();
            if (StringUtils.isNotEmpty(ipt)) {
                return ipt;
            }
        }
        throw new MybatisPlusException("請輸入正確的" + tip + "！");
    }

    public static void main(String[] args) {
        // 程式碼生成器
        AutoGenerator mpg = new AutoGenerator();

        // 全域性配置
        GlobalConfig gc = new GlobalConfig();
        String projectPath = System.getProperty("user.dir");
        gc.setOutputDir(projectPath + "/src/main/java");
        gc.setAuthor("jobob");
        gc.setOpen(false);
        mpg.setGlobalConfig(gc);

        // 資料來源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl("jdbc:mysql://localhost:3306/ant?useUnicode=true&useSSL=false&characterEncoding=utf8");
        // dsc.setSchemaName("public");
        dsc.setDriverName("com.mysql.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("密碼");
        mpg.setDataSource(dsc);

        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setModuleName(scanner("模組名"));
        pc.setParent("com.baomidou.ant");
        mpg.setPackageInfo(pc);

        // 自定義配置
        InjectionConfig cfg = new InjectionConfig() {
            @Override
            public void initMap() {
                // to do nothing
            }
        };

        // 如果模板引擎是 freemarker
        String templatePath = "/templates/mapper.xml.ftl";
        // 如果模板引擎是 velocity
        // String templatePath = "/templates/mapper.xml.vm";

        // 自定義輸出配置
        List<FileOutConfig> focList = new ArrayList<>();
        // 自定義配置會被優先輸出
        focList.add(new FileOutConfig(templatePath) {
            @Override
            public String outputFile(TableInfo tableInfo) {
                // 自定義輸出檔名
                return projectPath + "/src/main/resources/mapper/" + pc.getModuleName()
                        + "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
            }
        });

        cfg.setFileOutConfigList(focList);
        mpg.setCfg(cfg);

        // 配置模板
        TemplateConfig templateConfig = new TemplateConfig();

        // 配置自定義輸出模板
        // templateConfig.setEntity();
        // templateConfig.setService();
        // templateConfig.setController();

        templateConfig.setXml(null);
        mpg.setTemplate(templateConfig);

        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setNaming(NamingStrategy.underline_to_camel);
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);
        strategy.setSuperEntityClass("com.baomidou.ant.common.BaseEntity");
        strategy.setEntityLombokModel(true);
        strategy.setRestControllerStyle(true);
        strategy.setSuperControllerClass("com.baomidou.ant.common.BaseController");
        strategy.setInclude(scanner("表名"));
        strategy.setSuperEntityColumns("id");
        strategy.setControllerMappingHyphenStyle(true);
        strategy.setTablePrefix(pc.getModuleName() + "_");
        mpg.setStrategy(strategy);
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        mpg.execute();
    }
}