qq_36939013的博客

通过json发送、private String sendPostByJson(String url, Map<String, Object> params,Map<String, String> headers) {CloseableHttpClient httpclient = httpClient.getHttpClient();HttpPost post = new HttpPost(url);if (params != null && !param

原理图

定义安装使用

使用springframework里面的BeanUtil类 /** * 提交意见反馈 */ @PostMapping("/feedback/report") public Object reportFeedBack(@RequestBody PoliceAppIndexFeedbackDTO policeAppIndexFeedbackDTO) { PoliceAppIndexFeedback feedback = new PoliceAppInd

String JSON = "{\n" + " \"type\": \"Feature\", \n" + " \"properties\": { }, \n" + " \"geometry\": {\n" + " \"type\": \"LineString\", \n" + " \"co...

package com.swcote;import com.swcote.people.resource.springboot.BasicSecurityConfigOverrider;import org.apache.ibatis.annotations.Mapper;import org.mybatis.spring.annotation.MapperScan;import org.springframework.boot.SpringApplication;import org.spri

文章目录convertconvert

javahutool 框架map的getordefault()方法

创建String类型的集合

control层 @ApiOperation("网格导入") @PostMapping("/grid/import") public boolean importPatrolGrid(@PathVariable String tenant, @RequestParam("file") MultipartFile file) { try { return patrolGrid

package com.swcote.pasturage.pasturageInfo.model;import java.math.BigDecimal;import com.baomidou.mybatisplus.annotation.IdType;import com.baomidou.mybatisplus.annotation.TableId;import com.baomidou.mybatisplus.extension.activerecord.Model;import jav

String JSON = "{\n" + " \"type\": \"Feature\", \n" + " \"properties\": { }, \n" + " \"geometry\": {\n" + " \"type\": \"Point\", \n" + " \"coordin...

private ObjectMapper mapper = new ObjectMapper(); FeatureCollection featureCollection = new FeatureCollection(); try { featureCollection = mapper.readValue(featureStream, FeatureCollection.class); } catch (IOException .

PUT http://localhost:8091/api/MWZHZLZX/patrol/trace HTTP/1.1Cookie: JSESSIONID=70C0F3FCC68BF2E1B2821318259D8B68content-type: application/json{ "gridStaffId": 324, "gridId": 302, "planI...

两种构造 LocalDateTime time = LocalDateTime.now(); System.out.println(time); LocalDateTime of = LocalDateTime.of(2015, 10, 22, 10, 10, 10); System.out.println(of);时间的加减 LocalDateTime plusTime...

创建传统 @Test public void test1() { Optional<Employee> op = Optional.of(new Employee()); Employee employee = op.get(); System.out.println(employee); }空的option...

并行流@Test public void test1() { Instant start = Instant.now(); LongStream.rangeClosed(0, 10000000000L) .parallel() .reduce(0, Long::sum); Instant...

对map排序//按年龄升序 employees.stream() .sorted(Comparator.comparingInt(Employee::getAge));//按年龄降序 employees.stream() .sorted((e1,e2) -> - Integer.compare(e1.getAge(), e2.getAge()...

Map<String,Integer> map = new HashMap<>(); map.put("张三", 1); map.put("李四", 2); map.put("王五", 3); //第一种方法 Optional<Map.Entry<String, In...

注意parallelStream是并发操作，也就是多线程，获取不固定了 List<Employee> employees = Arrays.asList( new Employee("张三", 18, 9999, 20, Employee.Status.FREE), new Employee("李四", 38, 4999, 20...

注意: 使用district要重写hashCode和equl方法 /** * 筛选和切片 * filter -过滤 * limit -截断 * skip - 跳过 * district -去重 根据hashCode() 和 equal 来的 */ List<Employee> employees = Arra...

/** * 三步 * 1、创建Stream * 2、中间操作 * 3、终止操作 */public class TestSteamApi { //创建steam的4种方式 @Test public void test1(){ //1.通过colletion 系列集合提供的steam() 或 parallelSteam() Stre...

先定义一个函数式接口@FunctionalInterfacepublic interface MyFun { Integer getValue(Integer value);}关于调用 @Test public void test6(){ //用lambda实现真的很灵活 100是lambda实现的参数 Integer num = ope...

策略模式将不同的地方剥离出来写成一个接口，可以用来减少冗余代码接口public interface MyPredicate<T> { boolean test(T t);}两个实现类public class FilterEmployeeByAge implements MyPredicate<Employee> { @Override ...

由于在工作中经常碰到 数组里面的对象有个属性children又是数组，现在记录下来常见递归算法对象结构根据code递归找到对象List<OuNode> roots = new ArrayList<>();private OuNode findNode(String code) { for (OuNode root : roots) { ...

public static void main(String[] args) { ConfigurableApplicationContext context = new SpringApplicationBuilder(MockAirSensorApp.class).web(WebApplicationType.NONE).run(args); if(Arrays...

java8新增4种接口消费型接口 没有返回 一个参数@Test public void test1(){ happy(10000, (money) -> System.out.println("大保健每次每次消费" + money + "元")); } public void happy(double money, Consumer<D...

最近在开发一个权限管理系统，用户是两张表组合的，分别是基础属性表和扩展属性表基础属性表 pluto_useriduser_nameremarks1曹操热爱加班2曹丕热爱吃饭3蔡徐坤喜欢唱、跳、rap、篮球4郭嘉喜欢唱、跳、rap、篮球5荀彧办事效率高6程昱喜欢写代码7夏侯渊精通java扩展属性表 plu...

int id = 1;String.format("配置异常！组织结构自定义属性 %s 不存在！", id);

编译的时候出现com.sun.deploy.net.URLEncoder找不到的问题改成了java.net.URLEncoder 注意以后不要引用这个包了

获取当前时间后一年的时间戳LocalDateTime.now().plusYears(1).atZone(ZoneId.systemDefault()).toInstant().toEpochMilli()

public static void main(String[] args) { generateImage("iVBORw0KGgoAAAANSUhEUgAAAEUAAABQCAYAAABPlrgBAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAABERSURBVHhe7ZwJtFVlFc...

匹配数字 String regex="^[+-]?\\d+(\\.\\d+)?$"; if (value.matches(regex) == false){ throw new CustomAttributeException(name + "不是number类型"); }

/** * 填充表身 */ public List<MergeCell> renderBody(Column[] headRow, List<Map<String, Object>> dataList, int rowOffset, XSSFSheet sheet){ List<MergeCell>...

ckplayer服务器搭建最近要使用ckplayer播放视频,但是ckplayer需要用服务器启动，记录一下一个简单的服务器npm install http-server -g pm i http-serveryarn -g http-serverhttp-server ....

java截图public class ScheenShot { public static void main(String[] args) throws Exception { String screenFilePath = System.getProperty("user.dir") + File.separator +"shot01.png"; Fi...

js里面把字符串反过来'RUNOOB'.split('').reverse().join("")结果：BOONUR

不定参函数public static String[][] expectedRows1(int r, int c, String[]... elements) { String[][] expectTable = new String[r][c]; for (int i = 0; i < r; i++) { for (int j = ...

模型搭建基本模型子目录1根目录摄像头1摄像头2子目录2更多使用框架springdata-jpa数据库设计- createTable: tableName: CAMERA_RESOURCE columns: - column: name: TYPE ...