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【代码】Centos7安装编译ffmpeg到指定目录。

用法一：mapper层的数据校验。

public class ZonedDateTimeToMillisecondSerializer extends JsonSerializer<ZonedDateTime> { @Override public void serialize(ZonedDateTime value, JsonGenerator jsonGenerator, SerializerProvid.

一、大数类除法（保留一位小数、四舍五入）BigDecimal finalAverageScore = checkScoreMap.get(courseObjectiveCheckModel.getId()) .divide(new BigDecimal(courseScores.size() - 1), 1, BigDecimal.ROUND_HALF_UP);

一、@MappedTypes和@MappedJdbcTypes前者对应java类型，后者对应数据库类型

1、普通的sorted排序（按照数值正序排序，从小到大）List<Integer> integers = new ArrayList<>(); integers.stream().sorted().collect(Collectors.toList());2、实体类的sorted排序(先根据课程名称排序，如果课程名称一样，再根据课程码排序)courseModels.stream().sorted(Comparator.comparing(Cour

Collections.swap(list, i, 0); // list：你的list// i：某元素的位置// 0：要调整的位置（第一位）

一、security的跨域解决方案@Componentpublic class WebSecurityCorsFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest request, ServletRes.

一、日期工具类依赖 <!-- 日期工具栏依赖 --> <dependency> <groupId>joda-time</groupId> <artifactId>joda-time</artifactId> </dependency>

思想：直接访问应用的主页面，如果没有登录则被拦截，重定向到登录界面。1、创建登录拦截器@Componentpublic class RemeberLoginIntercepter implements HandlerInterceptor { @Autowired private UserMapper userMapper; @Override public boolean preHandle(HttpServletRequest request, Htt

主要是实现UserDetailsService接口BCryptPasswordEncoder类一、引入依赖 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency

一、引入依赖 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-cache</artifactId> </dependency> <dependency> <group

方法一：使用jedis客户端一、引入依赖 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-redis</artifactId> </dependency> <dependency>

一、Swagger的好处1、生成在线接口文档2、方便接口测试二、引入Swagger所需要的maven <!--swagger--> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> &lt

一、导入Redis的maven依赖 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency>二、配置application.properties文件

一、引入Mybatis的maven依赖 <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.1.0</version> </d

一、编写类实现HandlerInterceptor接口，实现需要实现的方法（如登录拦截器）public class LoginIntercepter implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { Ht

一、enctype和method要设置成图片样式form表单如下：<form class="form-horizontal" role="form"> <div class="form-group"> <label for="inputEmail1" class="col-lg-2 col-sm-2 control-label"&g.

一、引入maven依赖 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency>

一、导入Druid的maven依赖 <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.20</version> </dependency>二、配置数据库信息（yml中）

1、首先创建自定义拦截器类实现HandlerInterceptor接口：public class LoginIntercepter implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { HttpSession