微调

njcn-common/src/main/java/com/njcn/common/utils/PubUtils.java

@@ -1,11 +1,23 @@
 package com.njcn.common.utils;
 
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.JavaType;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.databind.type.TypeFactory;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+import com.njcn.common.pojo.enums.response.CommonResponseEnum;
+import com.njcn.common.pojo.exception.BusinessException;
+
+import java.io.IOException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Type;
 import java.math.BigDecimal;
 import java.math.RoundingMode;
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
-import java.util.Optional;
+import java.text.SimpleDateFormat;
+import java.time.Instant;
+import java.util.*;
+import java.util.concurrent.TimeUnit;
 
 /**
  * @author hongawen
@@ -14,6 +26,9 @@ import java.util.Optional;
  */
 public class PubUtils {
 
+    private final static ObjectMapper MAPPER = new ObjectMapper();
+
+
     /**
      * 根据参数返回double的四舍五入值
      *
@@ -68,4 +83,128 @@ public class PubUtils {
                 .orElse(Double.MIN_VALUE);
     }
 
+    /***
+     * 将instant转为date 处理8小时误差
+     * @author hongawen
+     * @date 2023/7/20 15:58
+     * @param instant 日期
+     * @return Instant
+     */
+    public static Date instantToDate(Instant instant){
+        return Date.from(instant.minusMillis(TimeUnit.HOURS.toMillis(8)));
+    }
+
+    /**
+     * 根据起始时间和截止时间返回yyyy-MM-dd的日期，
+     *
+     * @param startTime 起始时间
+     * @param endTime   截止时间
+     */
+    public static List<String> getTimes(Date startTime, Date endTime) {
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+        List<String> result = new ArrayList<>();
+        Calendar start = Calendar.getInstance();
+        start.setTime(startTime);
+        Calendar end = Calendar.getInstance();
+        end.setTime(endTime);
+        end.set(end.get(Calendar.YEAR), end.get(Calendar.MONTH), end.get(Calendar.DAY_OF_MONTH), 0, 0, 0);
+        long interval = end.getTimeInMillis() - start.getTimeInMillis();
+        result.add(sdf.format(start.getTime()));
+        if (interval > 0) {
+            int days = (int) (interval / 86400000);
+            for (int i = 0; i < days; i++) {
+                start.add(Calendar.DAY_OF_MONTH, 1);
+                result.add(sdf.format(start.getTime()));
+            }
+        }
+        return result;
+    }
+
+    /**
+     * 将当前时间的秒数置为0
+     *
+     * @param date 时间
+     */
+    public static Date getSecondsAsZero(Date date) {
+        Calendar calendar = Calendar.getInstance();
+        calendar.setTime(date);
+        calendar.set(Calendar.SECOND, 0);
+        return calendar.getTime();
+    }
+
+
+    /***
+     * 将date转为instant 处理8小时误差
+     * @author hongawen
+     * @date 2023/7/20 15:58
+     * @param date 日期
+     * @return Instant
+     */
+    public static Instant dateToInstant(Date date){
+        return date.toInstant().plusMillis(TimeUnit.HOURS.toMillis(8));
+    }
+
+
+    /**
+     * 用于获取对象中，前缀一样，后缀为2~50的属性值
+     *
+     * @param object       待操作对象
+     * @param methodPrefix 方法前缀
+     * @param number       方法后缀
+     * @return 对象属性值
+     */
+    public static Float getValueByMethod(Object object, String methodPrefix, Integer number) {
+        try {
+            Method method = object.getClass().getMethod(methodPrefix + number);
+            return (Float) method.invoke(object);
+        } catch (Exception e) {
+            throw new BusinessException(CommonResponseEnum.REFLECT_METHOD_EXCEPTION);
+        }
+    }
+
+    /**
+     * 根据参数返回float的四舍五入值
+     *
+     * @param i     保留的位数
+     * @param value float原值
+     */
+    public static Float floatRound(int i, float value) {
+        BigDecimal bp = new BigDecimal(value);
+        return bp.setScale(i, RoundingMode.HALF_UP).floatValue();
+    }
+
+
+    /**
+     * 将JSON转为实体对象
+     *
+     * @param jsonStr    json
+     * @param targetType 对象类型
+     * @param <T>        对象
+     */
+    public static <T> T json2obj(String jsonStr, Type targetType) {
+        try {
+            JavaType javaType = TypeFactory.defaultInstance().constructType(targetType);
+            MAPPER.registerModule(new JavaTimeModule());
+            MAPPER.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
+            return MAPPER.readValue(jsonStr, javaType);
+        } catch (IOException e) {
+            throw new IllegalArgumentException("将JSON转换为对象时发生错误:" + jsonStr, e);
+        }
+    }
+
+    /**
+     * 将实体对象转为JSON
+     *
+     * @param object   实体对象
+     */
+    public static String obj2json(Object object) {
+        try {
+            MAPPER.configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true);
+            return MAPPER.writeValueAsString(object);
+        } catch (IOException e) {
+            throw new IllegalArgumentException("将实体对象转为JSON时发生错误:" + object, e);
+        }
+    }
+
+
 }