SpringBoot_school

建立基本的SpringBoot项目

  1. 创建一个maven项目，在pom文件继承依赖

    1
    2
    3
    4
    5
    <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.7.8</version>
    </parent>

  2. 在pom中添加SpringBoot依赖

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
       
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
       
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
       
        <!--        实现Spring项目的热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>
       
        <!--数据校验依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>
       
        <!--spring-boot和mybatis-plus整合的jar-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.3</version>
        </dependency>
       
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>
       
    </dependencies>

  3. 新建SpringBootApplication.java运行类，添加@SpringBootApplication注解

SpringBoot全局配置文件

1
2
3
4
5
6
7
8
9
10
11
application.properties
#配置tomcat端口号
server.port=8080
#server项目访问路径
server.servlet.context-path: /toutiao2023

application.yml
server:
  port: 8899
  servlet:
    context-path: /toutiao2023

SpringBoot自定义配置

1、在SpringBoot工程中，使用@ConfigurationProperties注入基本属性url、username、password、email、数组属性userList、Map属性pass，通过validation对email属性的值进行验证；

2、使用@Value注入属性uploadPath，使用SpEL表达式注入属性值；

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
@Component
//@Component代表是Spring容器中的bean对象
@ConfigurationProperties(prefix = "prop")
//@ConfigurationProperties代表将配置文件当中的属性注入到类的属性当中
//prefix = “prop” 表示以prop为前缀的属性
@Data
@Validated
//@Validated表示要对属性进行校验
public class Prop {
    private String username;
    private String password;
    private String users[];
    private Map passes;
    @Email(message = "邮箱格式错误!")
//    @Email  表示该属性必须遵守email正确的格式，message表示错误格式
    private String email;
    @Value("${upload.path}")
    private String uploadPath;
    @Value("#{5*6}")
    private String result;
}

application.yml
prop:
  userName: jerry
  pass_word: 123456
  users: [tom,jack,tough]
  passes: {tom: 123,jack: 456,tough: 789}
  email: yunfree163@163.com
upload:
  path: E:\ServiceFile\

3、在SpringBoot工程中，使用@PropertySource读取自定义配置文件属性

4、使用@Configuration编写自定义配置类；

1
2
3
4
5
6
7
8
9
10
11
12
13
14
@Configuration
//@Configuration 和component一样不过标记为配置类
@PropertySource("classpath:test.properties")
//@PropertySource 表示读取自定义的配置文件
@ConfigurationProperties(prefix = "info")
@Data
public class MyProp {
    private String user;
    private String pass;
}

test.properties
info.user = monica
info.pass = 1234

SpringBoot多环境配置

1
2
3
4
5
6
7
8
9
10
11
12
13
1、在SpringBoot工程中，进行多环境配置，在多个配置文件中使用不同的端口号；
2、在全局配置文件中激活对应的配置文件，
源代码：
application.properties
spring.profiles.active=test

application-test.properties
#测试环境
server.port=8888

application-prod.properties
#生产环境
server.port=9999

SpringBoot存储静态文件在本机配置

1
2
3
4
5
6
7
8
9
10
11
12
13
upload:
 path: E:\ServiceFile\
 oldPath: C:\Users\yunfree\Pictures\toutiao\uploadFile


mvc:
   static-path-pattern: /pic/**
 web:
   resources:
     static-locations: file${oldPath}

Mybatis-plus自动生成代码

Mybatis-plus代码生成器,生成Controller、Service、Mapper、Model代码；

依赖

1
2
3
4
5
6
7
8
9
10
11
<dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.5.3</version>
        </dependency>

        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>2.3</version>
        </dependency>

生成配置启动代码

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
public class UserGenerator {
    public static void main(String[] args) {
        List<String> tables = new ArrayList<>();
        tables.add("user");
        tables.add("chatmsg");
        tables.add("comment");
        tables.add("kind");
        tables.add("article");
        tables.add("picture");
        tables.add("log");

        FastAutoGenerator.create("jdbc:mysql://localhost:3306/toutiaodb","root",
                        "123456")
                .globalConfig(builder -> {
                    builder.author("yunfree")               //作者
                            .outputDir(System.getProperty("user.dir")+"\\src\\main\\java")    //输出路径(写到java目录)
                            //.enableSwagger()           //开启swagger
                            .commentDate("yyyy-MM-dd")
                            .fileOverride();            //开启覆盖之前生成的文件

                })
                .packageConfig(builder -> {
                    builder.parent("org.yunfree")
                            .moduleName("toutiao2023021")
                            .entity("model")
                            .service("service")
                            .serviceImpl("serviceImpl")
                            .controller("controller")
                            .mapper("mapper")
                            .xml("mapper")
                            .pathInfo(Collections.singletonMap(OutputFile.xml,System.getProperty("user.dir")+"\\src\\main\\resources\\mapper"));
                })
                .strategyConfig(builder -> {
                    builder.addInclude(tables)
                            .addTablePrefix("p_")
                            .serviceBuilder()
                            .formatServiceFileName("%sService")
                            .formatServiceImplFileName("%sServiceImpl")
                            .entityBuilder()
                            .enableLombok()
                            .logicDeleteColumnName("deleted")
                            .enableTableFieldAnnotation()
                            .controllerBuilder()
                            .formatFileName("%sController")
                            .enableRestStyle()
                            .mapperBuilder()
                            .enableBaseResultMap()  //生成通用的resultMap
                            .superClass(BaseMapper.class)
                            .formatMapperFileName("%sMapper")
                            .enableMapperAnnotation()
                            .formatXmlFileName("%sMapper");
                })
                //.templateEngine(new FreemarkerTemplateEngine()) // 使用Freemarker引擎模板，默认的是Velocity引擎模板
                .execute();
    }
}

MyBatisX插件生成 Service、Mapper、Model代码；

  1. 在idea中连接数据库

    image

  2. 选中需要生成的数据库表，右键生成

    image

  3. 修改相应配置点击生成

    image

SpringBoot配置德鲁伊druid连接池

配置信息

1
2
3
4
5
6
7
8
9
10
11
12
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/toutiaodb
    username: root
    password: 123456
    type: com.alibaba.druid.pool.DruidDataSource
    druid:
      initial-size: 5
      min-idle: 5
      max-wait: 30000
      max-active: 20

依赖信息

1
2
3
4
5
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.1.23</version>
</dependency>

Mybatis-plus分页配置

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

@Configuration
@MapperScan("org.yunfree.toutiao202302.mapper")
public class MybatisPlusConfig {
    /**
     * 新的分页插件,一缓和二缓遵循mybatis的规则,需要设置 MybatisConfiguration#useDeprecatedExecutor = false 避免缓存出现问题(该属性会在旧插件移除后一同移除)
     */
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.H2));
        return interceptor;
    }

//    @Bean
//    public ConfigurationCustomizer configurationCustomizer() {
//        return configuration -> configuration.setUseDeprecatedExecutor(false);
//    }
}

SpringBoot全局跨域

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
//全局跨域
@Configuration
public class CorsConfig implements WebMvcConfigurer {
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                //是否发送Cookie
                .allowCredentials(true)
                //放行哪些原始域
                .allowedOriginPatterns("*")
                .allowedMethods(new String[]{"GET", "POST", "PUT", "DELETE"})
                .allowedHeaders("*")
                .exposedHeaders("*");
    }
}

2023-3-13