springboot使用研究

map-underscore-to-camel-case: true

开启驼峰命名

   @GetMapping("/userInfo")
    public Result<Users>  userInfo(@RequestHeader(name = "Authorization") String token,HttpServletResponse  response) {
        Map<String, Object> map = JwtUtil.parseToken(token);
//        System.out.println(","+map.get("user")+"."+map.get("user"));

        String username =(String) map.get("username");
        Users u = usersService.findByUserName(username);

        return Result.success(u);
    }

threadlocal

相当于全局变量

//全局变量 全局共享变量
public class ThreadLocalUtils {
    private static ThreadLocal THREAD_LOCAL = new ThreadLocal();
//    根据键值对取值
    public static <T> T get() {
        return (T)THREAD_LOCAL.get();
    }
//    存储键值对
    public static void set(Object o) {
        THREAD_LOCAL.set(o);
    }
//    清除 防止内存泄露
    public static void remove() {
        THREAD_LOCAL.remove();
    }
}

线程安全的

// 根据用户名查询
    @Select("select * from users where username=#{username}")
    Users findByUserName(String username);


    //    添加注册
//    @Insert("insert into users(username,password,create_time,update_time) values(#{username},#{possword},now(),now())")
//    void add(String username, String possword);
    @Insert("insert into users(password,username) values(#{possword},#{username})")
    void add(@Param("possword")String possword, @Param("username")String username);

    @Select("select * from users where username=#{username} and password=#{possword}")
    Users find(@Param("username")String username, @Param("possword")String possword);

    @Update("update users set nickname=#{nickname},email=#{email},update_time=#{updateTime} where id=#{id}")
    void update(Users u);

Notnull  不能为null

notempty 不能为null并且不能为空

emai  email格式校验

@validated 满足的实体进行生效

@pattern

添加validated才能够生效

@URL 判断是否为url地址

    @Update("update users set password=#{newpwd},update_time=now() where id=#{id}")
    void updatePwd( @Param("newpwd")String newpwd, @Param("id") Integer id);

     <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>persistence-api</artifactId>
            <version>1.0</version>
        </dependency>

添加依赖  使用

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
 
@Entity
public class ExampleEntity {
    @Id
    private Long id;
 
    @Column(name = "\"order\"") // 使用双引号来包围关键字
    private String order;
 
    // 省略getter和setter
}

使用redis进行token失效  主动失效

集成redis

  <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

  data:
    redis:
      host: 127.0.0.1
      port: 6379

//这个注解，单元测试执行之前，先初始化这个容器
@SpringBootTest
public class redistest {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Test
    public  void test(){
//        向redis中添加键值对
        ValueOperations<String,String> valueOperations =  stringRedisTemplate.opsForValue();
        valueOperations.set("username","world");
//        秒过期
        valueOperations.set("id","1", 15,TimeUnit.SECONDS);
//        String hello = valueOperations.get("username");
//        System.out.println(hello);
    }

    @Test
    public  void gettest(){
//        向redis中添加键值对
        ValueOperations<String,String> valueOperations =  stringRedisTemplate.opsForValue();
//        valueOperations.set("username","world");
        String hello = valueOperations.get("id");
        System.out.println(hello);
    }
}

redis的操作

//                删除redis某个key
                ValueOperations<String,String> val = stringRedisTemplate.opsForValue();
                val.getOperations().delete("token");

   String token1 = stringRedisTemplate.opsForValue().get("token");
        if(token1==null){
            throw new RuntimeException();
        }else{

        }

拦截器拦截中的token判断

 <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>${spring-boot.version}</version>

打包jar包

打包

打包之后的位置

jar -jar jar包名称

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-resources-plugin</artifactId>
    <version>3.1.0</version>
</plugin>

    <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>3.1.0</version>
            </plugin>

打包用的配置plugin

改为false

修改端口   java -jar big.jar  --server.port=9999