diff --git a/luoo_common/pom.xml b/luoo_common/pom.xml
index 3f91e65..5ae7f32 100644
--- a/luoo_common/pom.xml
+++ b/luoo_common/pom.xml
@@ -12,5 +12,12 @@
       <artifactId>jjwt</artifactId>
       <version>0.9.1</version>
     </dependency>
+    <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-lang3</artifactId>
+      <version>3.14.0</version>
+    </dependency>
+
   </dependencies>
 </project>
diff --git a/luoo_common/src/main/java/com/luoo/common/exception/BizException.java b/luoo_common/src/main/java/com/luoo/common/exception/BizException.java
new file mode 100644
index 0000000..486ed81
--- /dev/null
+++ b/luoo_common/src/main/java/com/luoo/common/exception/BizException.java
@@ -0,0 +1,20 @@
+package com.luoo.common.exception;
+
+public class BizException extends RuntimeException {
+    private static final long serialVersionUID = 2466145171145432619L;
+
+    private Integer code = 500;
+
+    public BizException(String message) {
+        super(message);
+    }
+
+    public BizException(String message, Integer code) {
+        super(message);
+        this.code = code;
+    }
+
+    public Integer getCode() {
+        return this.code;
+    }
+}
diff --git a/luoo_common/src/main/java/com/luoo/common/util/AssertUtil.java b/luoo_common/src/main/java/com/luoo/common/util/AssertUtil.java
new file mode 100644
index 0000000..cf1926c
--- /dev/null
+++ b/luoo_common/src/main/java/com/luoo/common/util/AssertUtil.java
@@ -0,0 +1,146 @@
+package com.luoo.common.util;
+
+import com.luoo.common.exception.BizException;
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.Arrays;
+import java.util.Collection;
+
+public class AssertUtil {
+
+    public static void mustTrue(boolean flag, String tips) {
+        if (!flag) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustFalse(boolean flag, String tips) {
+        mustTrue(!flag, tips);
+    }
+
+    public static void valueLimit(Number value, Number min, Number max, String tips) {
+        if (null == value || value.longValue() < min.longValue() || value.longValue() > max.longValue()) {
+            assertError(tips);
+        }
+    }
+
+    public static void valueMinLimit(Number value, Number min, String tips) {
+        if (null == value || value.longValue() < min.longValue()) {
+            assertError(tips);
+        }
+    }
+
+    public static void valueMaxLimit(Number value, Number max, String tips) {
+        if (null == value || value.longValue() > max.longValue()) {
+            assertError(tips);
+        }
+    }
+
+    public static void lengthLimit(String text, int min, int max, String tips) {
+        if (null == text || text.length() < min || text.length() > max) {
+            assertError(tips);
+        }
+    }
+
+    public static void sizeLimit(Collection<?> array, int min, int max, String tips) {
+        if (null == array || array.size() < min || array.size() > max) {
+            assertError(tips);
+        }
+    }
+
+    public static void sizeLimit(Object[] array, int min, int max, String tips) {
+        if (null == array || array.length < min || array.length > max) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustNotIn(Object source, Object[] arrays, String tips) {
+        Object find = CollectionUtil.findAny(Arrays.asList(arrays), source::equals);
+        if (null != find) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustIn(Object source, Object[] arrays, String tips) {
+        Object find = CollectionUtil.findAny(Arrays.asList(arrays), source::equals);
+        if (null == find) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustNotEq(Object source, Object unexpect, String tips) {
+        if (unexpect.equals(source)) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustEq(Object source, Object expect, String tips) {
+        if (!expect.equals(source)) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustNull(Object source, String tips) {
+        if (null != source) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustNotNull(Object source, String tips) {
+        if (null == source) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustNotBlank(String text, String tips) {
+        if (StringUtils.isBlank(text)) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustEmpty(String text, String tips) {
+        if (!StringUtils.isEmpty(text)) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustEmpty(Collection<?> collection, String tips) {
+        if (null != collection && collection.size() > 0) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustEmpty(Object[] arrays, String tips) {
+        if (null != arrays && arrays.length > 0) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustNotEmpty(String text, String tips) {
+        if (StringUtils.isEmpty(text)) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustNotEmpty(Collection<?> collection, String tips) {
+        if (null == collection || collection.size() == 0) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustNotEmpty(Object[] arrays, String tips) {
+        if (null == arrays || arrays.length == 0) {
+            assertError(tips);
+        }
+    }
+
+    public static void mustGtZero(Long value, String tips) {
+        if (value <= 0) {
+            assertError(tips);
+        }
+    }
+
+    public static void assertError(String tips) {
+        throw new BizException(tips);
+    }
+}
diff --git a/luoo_common/src/main/java/com/luoo/common/util/CollectionUtil.java b/luoo_common/src/main/java/com/luoo/common/util/CollectionUtil.java
new file mode 100644
index 0000000..1e93ee4
--- /dev/null
+++ b/luoo_common/src/main/java/com/luoo/common/util/CollectionUtil.java
@@ -0,0 +1,83 @@
+package com.luoo.common.util;
+
+import java.math.BigDecimal;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.*;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class CollectionUtil {
+        private static Boolean USE_PARALLEL = false;
+
+        static void init(boolean useParallel) {
+            USE_PARALLEL = useParallel;
+        }
+
+        public static <T> T findFirst(Collection<T> list, Predicate<T> predicate) {
+            return stream(list).filter(predicate).findFirst().orElse((T) null);
+        }
+
+        public static <T> T findAny(Collection<T> list, Predicate<T> predicate) {
+            return stream(list).filter(predicate).findAny().orElse((T) null);
+        }
+
+        public static <T> List findList(Collection<T> list, Predicate<T> predicate) {
+            return (List)stream(list).filter(predicate).collect(Collectors.toList());
+        }
+
+        public static <T, R> List toList(Collection<T> list, Function<T, R> function) {
+            return (List)stream(list).map(function).collect(Collectors.toList());
+        }
+
+        public static <T, R> Set toSet(Collection<T> list, Function<T, R> function) {
+            return (Set)stream(list).map(function).collect(Collectors.toSet());
+        }
+
+        public static <T, K> Map toMap(Collection<T> list, Function<T, K> keyMapper) {
+            return toMap(list, keyMapper, Function.identity());
+        }
+
+        public static <T, K, U> Map toMap(Collection<T> list, Function<T, K> keyMapper, Function<T, U> valueMapper) {
+            return (Map)stream(list).collect(Collectors.toMap(keyMapper, valueMapper));
+        }
+
+        public static <T, R> Map groupBy(Collection<T> list, Function<T, R> function) {
+            return (Map)stream(list).collect(Collectors.groupingBy(function));
+        }
+
+        public static <T> BigDecimal sum(Collection<T> list, Function<T, BigDecimal> function) {
+            return (BigDecimal)stream(list).map((x) -> {
+                BigDecimal value = (BigDecimal)function.apply(x);
+                return value == null ? BigDecimal.ZERO : value;
+            }).reduce(BigDecimal.ZERO, BigDecimal::add);
+        }
+
+        public static <T> Long sum(Collection<T> list, ToLongFunction<T> function) {
+            return stream(list).mapToLong(function).sum();
+        }
+
+        public static <T> Double sum(Collection<T> list, ToDoubleFunction<T> function) {
+            return stream(list).mapToDouble(function).sum();
+        }
+
+        public static <T> Integer sum(Collection<T> list, ToIntFunction<T> function) {
+            return stream(list).mapToInt(function).sum();
+        }
+
+        public static <T> Stream<T> stream(Collection<T> list) {
+            if (list == null) {
+                throw new NullPointerException("list is marked non-null but is null");
+            } else {
+                return USE_PARALLEL ? list.parallelStream() : list.stream();
+            }
+        }
+
+        public static <T> Predicate<T> distinct(Function<T, ?> function) {
+            Set<Object> seen = ConcurrentHashMap.newKeySet();
+            return t -> seen.add(function.apply(t));
+        }
+}