update README.md.

Signed-off-by: 夜雪剑辰 <1107047387@qq.com>

README.md

@@ -1,11 +1,11 @@
-yexuejc-base 基于jdk8常用工具包
+yexuejc-base 基于jdk11常用工具包
 ----------------------
 源码地址:<br>
 github:https://github.com/yexuejc/yexuejc-base
 gitee:https://gitee.com/jzsw-it/yexuejc-base
 
 ### 说明
-1. 支持环境：java8（1.5.0开始支持java11，请使用`x.x.x-jre11`版本）
+1. 支持环境：java11（1.5.0开始支持java11，请使用`1.5.x-jre11`版本）
 2. 该工具包基于springboot提取，按理说适用于所有java工程
 3. 其中依赖jjwt相关、validation-api，排除请使用
 >   ```
@@ -23,7 +23,7 @@ gitee:https://gitee.com/jzsw-it/yexuejc-base
 7. 从`1.5.0`开始，版本分为`1.5.0-jre8`和`1.5.0-jre11`，分别对于jre8和jre11使用
 
 ### 使用
->yexuejc.base.version=1.5.0-jre8
+>yexuejc.base.version=1.5.1-jre11
 
 pom.xml
 ```

src/main/java/com/yexuejc/base/pojo/ReadFileBean.java

@@ -120,4 +120,8 @@ public class ReadFileBean<T> {
     public String lineScavenge(String lineData) {
         return this.lineScavenger.apply(lineData);
     }
+
+    public boolean hasNext() {
+        return this.fileLength > this.pointer;
+    }
 }

src/main/java/com/yexuejc/base/util/FileUtil.java

@@ -504,7 +504,7 @@ public class FileUtil {
             List<String> datas = new ArrayList<>();
             int row = 1;
             String line;
-            while ((line = randomAccessFile.readLine()) != null && row < readFileBean.getReadRowNum()) {
+            while ((line = randomAccessFile.readLine()) != null && row <= readFileBean.getReadRowNum()) {
                 row++;
                 readFileBean.setPointer(randomAccessFile.getFilePointer());
                 datas.add(readFileBean.lineScavenge(charsetDecode(line, readFileBean.getReadCharset())));            }

src/main/java/com/yexuejc/base/util/JsonUtil.java

@@ -1,17 +1,5 @@
 package com.yexuejc.base.util;
 
-import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.core.JsonGenerator;
-import com.fasterxml.jackson.core.JsonParseException;
-import com.fasterxml.jackson.core.JsonParser;
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.core.type.TypeReference;
-import com.fasterxml.jackson.databind.*;
-import com.fasterxml.jackson.databind.json.JsonMapper;
-import com.fasterxml.jackson.databind.type.MapType;
-import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
-import com.yexuejc.base.converter.*;
-
 import java.io.IOException;
 import java.io.InputStream;
 import java.sql.Timestamp;
@@ -21,6 +9,30 @@ import java.util.Map;
 import java.util.TimeZone;
 import java.util.logging.Logger;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonParseException;
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.JavaType;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.json.JsonMapper;
+import com.fasterxml.jackson.databind.type.MapType;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+import com.yexuejc.base.converter.LocalDateDeserializer;
+import com.yexuejc.base.converter.LocalDateSerializer;
+import com.yexuejc.base.converter.LocalDateTimeDeserializer;
+import com.yexuejc.base.converter.LocalDateTimeSerializer;
+import com.yexuejc.base.converter.TimestampDeserializer;
+import com.yexuejc.base.converter.TimestampSerializer;
+
 /**
  * json工具类，基于jackson
  *
@@ -30,7 +42,7 @@ import java.util.logging.Logger;
  * @date 2018/9/3 15:28
  */
 public class JsonUtil {
-    private static Logger log = Logger.getLogger(JsonUtil.class.getName());
+    private static final Logger log = Logger.getLogger(JsonUtil.class.getName());
 
     private JsonUtil() {
     }
@@ -38,10 +50,9 @@ public class JsonUtil {
     /**
      * 作为单例全局使用
      */
-    private static JsonMapper jsonMapper = new JsonMapper();
+    private static final JsonMapper jsonMapper = new JsonMapper();
 
     static {
-        JsonUtil.setJavaTimeModule(JsonUtil.jsonMapper);
         JsonUtil.initDefaultObjectMapper(JsonUtil.jsonMapper);
     }
 
@@ -82,14 +93,17 @@ public class JsonUtil {
      * </pre>
      *
      * @param jsonMapper
+     * @return
      */
-    private static void initDefaultObjectMapper(ObjectMapper jsonMapper) {
+    private static ObjectMapper initDefaultObjectMapper(ObjectMapper jsonMapper) {
+        JsonUtil.setJavaTimeModule(jsonMapper);
         //值为空时，NON_NULL：舍去字段；ALWAYS:保留字段
         jsonMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
         jsonMapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
         jsonMapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
         jsonMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
         jsonMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
+        return jsonMapper;
     }
 
     /**
@@ -109,8 +123,7 @@ public class JsonUtil {
      *
      * @return
      */
-    public static ObjectMapper acceptEmptyStringAsNullObject() {
-        JsonMapper jsonMapper = new JsonMapper();
+    public static ObjectMapper acceptEmptyStringAsNullObject(JsonMapper jsonMapper) {
         setJavaTimeModule(jsonMapper);
         //值为空时，ALWAYS:保留字段，默认字符串值为“”，对象值为null
         jsonMapper.setSerializationInclusion(JsonInclude.Include.ALWAYS);
@@ -179,11 +192,11 @@ public class JsonUtil {
         try {
             pojo = jsonMapper.readValue(json, cls);
         } catch (JsonParseException e) {
-            log.warning("json to Object JsonParseException.\n" + e.getMessage());
+            log.warning("json to Object JsonParseException.\n" + e);
         } catch (JsonMappingException e) {
-            log.warning("json to Object JsonMappingException.\n" + e.getMessage());
+            log.warning("json to Object JsonMappingException.\n" + StrUtil.printStackTrace(e));
         } catch (IOException e) {
-            log.warning("json to Object IOException.\n" + e.getMessage());
+            log.warning("json to Object IOException.\n" + StrUtil.printStackTrace(e));
         }
 
         return pojo;
@@ -201,13 +214,13 @@ public class JsonUtil {
         try {
             pojo = jsonMapper.readValue(json, cls);
         } catch (JsonParseException e) {
-            log.warning("json to Object JsonParseException.\n" + e.getMessage());
+            log.warning("json to Object JsonParseException.\n" + StrUtil.printStackTrace(e));
         } catch (JsonMappingException e) {
-            log.warning("json to Object JsonMappingException.\n" + e.getMessage());
+            log.warning("json to Object JsonMappingException.\n" + StrUtil.printStackTrace(e));
         } catch (IOException e) {
-            log.warning("json to Object IOException.\n" + e.getMessage());
+            log.warning("json to Object IOException.\n" + StrUtil.printStackTrace(e));
         } catch (Exception e) {
-            e.printStackTrace();
+            log.warning("json to Object Exception.\n" + StrUtil.printStackTrace(e));
         }
 
         return pojo;
@@ -227,11 +240,11 @@ public class JsonUtil {
         try {
             pojo = jsonMapper.readValue(json, javaType);
         } catch (JsonParseException e) {
-            log.warning("json to Object JsonParseException.\n" + e.getMessage());
+            log.warning("json to Object JsonParseException.\n" + StrUtil.printStackTrace(e));
         } catch (JsonMappingException e) {
-            log.warning("json to Object JsonMappingException.\n" + e.getMessage());
+            log.warning("json to Object JsonMappingException.\n" + StrUtil.printStackTrace(e));
         } catch (IOException e) {
-            log.warning("json to Object IOException.\n" + e.getMessage());
+            log.warning("json to Object IOException.\n" + StrUtil.printStackTrace(e));
         }
         return pojo;
     }
@@ -252,11 +265,11 @@ public class JsonUtil {
         try {
             pojo = jsonMapper.readValue(json, mapType);
         } catch (JsonParseException e) {
-            log.warning("json to Object JsonParseException.\n" + e.getMessage());
+            log.warning("json to Object JsonParseException.\n" + StrUtil.printStackTrace(e));
         } catch (JsonMappingException e) {
-            log.warning("json to Object JsonMappingException.\n" + e.getMessage());
+            log.warning("json to Object JsonMappingException.\n" + StrUtil.printStackTrace(e));
         } catch (IOException e) {
-            log.warning("json to Object IOException.\n" + e.getMessage());
+            log.warning("json to Object IOException.\n" + StrUtil.printStackTrace(e));
         }
         return pojo;
     }
@@ -273,7 +286,7 @@ public class JsonUtil {
         try {
             return jsonMapper.readValue(json, javaType);
         } catch (JsonProcessingException e) {
-            log.warning("json to Object JsonParseException.\n" + e.getMessage());
+            log.warning("json to Object JsonParseException.\n" + StrUtil.printStackTrace(e));
         }
         return null;
     }
@@ -293,11 +306,11 @@ public class JsonUtil {
         try {
             pojo = jsonMapper.readValue(json, javaType);
         } catch (JsonParseException e) {
-            log.warning("json to Object JsonParseException.\n" + e.getMessage());
+            log.warning("json to Object JsonParseException.\n" + StrUtil.printStackTrace(e));
         } catch (JsonMappingException e) {
-            log.warning("json to Object JsonMappingException.\n" + e.getMessage());
+            log.warning("json to Object JsonMappingException.\n" + StrUtil.printStackTrace(e));
         } catch (IOException e) {
-            log.warning("json to Object IOException.\n" + e.getMessage());
+            log.warning("json to Object IOException.\n" + StrUtil.printStackTrace(e));
         }
         return pojo;
     }
@@ -313,7 +326,7 @@ public class JsonUtil {
         try {
             json = jsonMapper.writeValueAsString(pojo);
         } catch (JsonProcessingException e) {
-            log.warning("json to Object JsonProcessingException.\n" + e.getMessage());
+            log.warning("json to Object JsonProcessingException.\n" + StrUtil.printStackTrace(e));
         }
         return json;
     }
@@ -329,8 +342,9 @@ public class JsonUtil {
         try {
             json = jsonMapper.writerWithDefaultPrettyPrinter().writeValueAsString(obj);
         } catch (JsonProcessingException e) {
-            log.warning("json to Object JsonProcessingException.\n" + e.getMessage());
+            log.warning("json to Object JsonProcessingException.\n" + StrUtil.printStackTrace(e));
         }
         return json;
     }
+
 }

src/main/java/com/yexuejc/base/util/ObjUtil.java

@@ -4,9 +4,13 @@ import com.yexuejc.base.annotation.ToUeProperty;
 
 import java.io.*;
 import java.lang.reflect.Field;
+import java.lang.reflect.Method;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.util.*;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.stream.Collectors;
 
 /**
  * 对象工具：对类的操作
@@ -18,6 +22,8 @@ import java.util.*;
  * @date 2018/12/28 15:54
  */
 public class ObjUtil {
+    private static Logger log = Logger.getLogger(ObjUtil.class.getName());
+
     private ObjUtil() {
     }
 
@@ -260,4 +266,150 @@ public class ObjUtil {
         return outer;
     }
 
+    /**
+     * 复制对象属性值，包含父类 (不需要getter和setter)
+     * <p>includeField和excludeField同时传入，走包含逻辑，</p>
+     *
+     * @param source       源对象
+     * @param targetClass  目标对象class
+     * @param includeField 包含对象
+     * @param excludeField 排除对象
+     * @param <I>
+     * @param <O>
+     * @return 目标对象
+     * @throws Exception
+     */
+    public static <I, O> O copy(I source, Class<O> targetClass, List<String> includeField, List<String> excludeField) throws Exception {
+        List<Field> allFields = getAllFields(source.getClass());
+        O o = targetClass.getDeclaredConstructor().newInstance();
+        if (StrUtil.isNotEmpty(excludeField) && StrUtil.isEmpty(includeField)) {
+            allFields = allFields.stream().filter(f -> !excludeField.contains(f.getName())).collect(Collectors.toList());
+        }
+        if (StrUtil.isNotEmpty(includeField)) {
+            allFields = allFields.stream().filter(f -> includeField.contains(f.getName())).collect(Collectors.toList());
+        }
+        allFields.forEach(f -> {
+            try {
+                try {
+                    Field field = targetClass.getDeclaredField(f.getName());
+                    if (field != null) {
+                        f.setAccessible(true);
+                        Object v = f.get(source);
+                        f.setAccessible(false);
+                        field.setAccessible(true);
+                        field.set(o, v);
+                        field.setAccessible(false);
+                    }
+                } catch (NoSuchFieldException e) {
+                }
+            } catch (Exception e) {
+                log.warning(lowerCaseFirstChar(f.getName()) + " field copy failed. " + e);
+                log.log(Level.FINER, lowerCaseFirstChar(f.getName()) +
+                        " field copy failed. The exception information is as follows:", e);
+            }
+        });
+        return o;
+    }
+
+    /**
+     * 深度复制对象
+     * <p>获取source的所有getXxx。xxx作为属性，且包含父类的getXxx</p>
+     * <p>查找target的xxx属性，进行反射设值</p>
+     *
+     * @param source       源对象
+     * @param targetClass  目标对象class
+     * @param invokeSetter 设置target属性值时，是否使用setter方法设置
+     * @param <I>
+     * @param <O>
+     * @return 目标对象
+     */
+    public static <I, O> O copy(I source, Class<O> targetClass, boolean invokeSetter) throws Exception {
+        List<Method> getterMethods = getAllGetterMethods(source.getClass(), "get");
+        O o = targetClass.getDeclaredConstructor().newInstance();
+        getterMethods.forEach(method -> {
+
+            String fieldName = method.getName().replace("get", "");
+            try {
+                Object v = method.invoke(source);
+                if (invokeSetter) {
+                    try {
+                        Method setterMethod = targetClass.getDeclaredMethod("set" + fieldName, method.getReturnType());
+                        if (null != setterMethod) {
+                            setterMethod.invoke(o, v);
+                        }
+                    } catch (NoSuchMethodException e) {
+                    }
+                } else {
+                    try {
+                        Field field = targetClass.getDeclaredField(lowerCaseFirstChar(fieldName));
+                        if (field != null) {
+                            field.setAccessible(true);
+                            field.set(o, v);
+                            field.setAccessible(false);
+                        }
+                    } catch (NoSuchFieldException e) {
+                    }
+                }
+            } catch (Exception e) {
+                log.warning(lowerCaseFirstChar(fieldName) + " field copy failed. " + e);
+                log.log(Level.FINER, lowerCaseFirstChar(fieldName) +
+                        " field copy failed. The exception information is as follows:\n", e);
+            }
+        });
+        return o;
+    }
+
+    /**
+     * 获取所有方法，包含父类
+     *
+     * @param beanClass
+     * @param startsWith 方法的开头匹配（空，返回所有）
+     * @return
+     */
+    public static List<Method> getAllGetterMethods(Class<?> beanClass, String startsWith) {
+        List<Method> methodList = new ArrayList<>();
+        Method[] methods = beanClass.getDeclaredMethods();
+        if (StrUtil.isNotEmpty(startsWith)) {
+            methodList.addAll(Arrays.stream(methods)
+                    .filter(method -> method.getName().startsWith(startsWith))
+                    .collect(Collectors.toList()));
+        } else {
+            methodList.addAll(Arrays.asList(methods));
+        }
+        Class<?> superclass = beanClass.getSuperclass();
+        if (superclass != null) {
+            methodList.addAll(getAllGetterMethods(superclass, startsWith));
+        }
+        return methodList;
+    }
+
+    /**
+     * 获取所有属性，包含父类
+     *
+     * @param beanClass
+     * @return
+     */
+    public static List<Field> getAllFields(Class<?> beanClass) {
+        List<Field> fieldList = new ArrayList<>();
+        while (beanClass != null) {
+            fieldList.addAll(Arrays.asList(beanClass.getDeclaredFields()));
+            beanClass = beanClass.getSuperclass();
+        }
+        return fieldList;
+    }
+
+    /**
+     * 首字母小写
+     *
+     * @param str
+     * @return
+     */
+    public static String lowerCaseFirstChar(String str) {
+        if (str == null || str.length() == 0) {
+            return str;
+        } else {
+            return str.substring(0, 1).toLowerCase() + str.substring(1);
+        }
+    }
+
 }

src/main/java/com/yexuejc/base/util/StrUtil.java

@@ -1,9 +1,19 @@
 package com.yexuejc.base.util;
 
 import java.io.UnsupportedEncodingException;
+import java.lang.reflect.Array;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Random;
+import java.util.UUID;
+import java.util.function.Consumer;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -19,39 +29,28 @@ public final class StrUtil {
     private StrUtil() {
     }
 
-    public static char[] HEX_CHAR = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
+    private static char[] HEX_CHAR = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
 
     /**
-     * 判断字符串，数组，集合 是否为空
+     * 判断字符串，数组，集合 是否为空(null，""，[],{})
      *
-     * @param obj
+     * @param obj 対象
+     * @return true:空;false:非空
      * @return
      */
     public static boolean isEmpty(Object obj) {
-        if (obj instanceof String) {
-            if (obj == null || "".equals((String) obj)) {
-                return true;
-            } else {
-                return false;
-            }
-        } else if (obj instanceof Object[]) {
-            if (obj == null || ((Object[]) obj).length == 0) {
-                return true;
-            } else {
-                return false;
-            }
-        } else if (obj instanceof Collection<?>) {
-            if (obj == null || ((Collection<?>) obj).size() == 0) {
-                return true;
-            } else {
-                return false;
-            }
+        if (obj == null) {
+            return true;
+        } else if (obj instanceof Optional) {
+            return ((Optional<?>) obj).isEmpty();
+        } else if (obj instanceof CharSequence) {
+            return ((CharSequence) obj).length() == 0;
+        } else if (obj.getClass().isArray()) {
+            return Array.getLength(obj) == 0;
+        } else if (obj instanceof Collection) {
+            return ((Collection<?>) obj).isEmpty();
         } else {
-            if (obj == null) {
-                return true;
-            } else {
-                return false;
-            }
+            return obj instanceof Map && ((Map<?, ?>) obj).isEmpty();
         }
     }
 
@@ -111,40 +110,6 @@ public final class StrUtil {
         return num.append(String.format("%010d", hashCode)).toString().substring(0, 8);
     }
 
-    /**
-     * 解析aa=bb&cc=dd&ee=ff格式的字符串，返回HashMap
-     *
-     * @param urlencoded
-     * @return
-     */
-    public static Map<String, String> parseUrlencoded(String urlencoded) {
-        if (isEmpty(urlencoded)) {
-            return null;
-        }
-        String[] entrys = urlencoded.split("&");
-        if (isEmpty(entrys)) {
-            return null;
-        }
-
-        Map<String, String> map = new HashMap<String, String>(16);
-        String[] kv = null;
-        for (String entry : entrys) {
-            if (isEmpty(entry)) {
-                continue;
-            }
-            kv = entry.split("=");
-            if (isEmpty(kv)) {
-                continue;
-            }
-            if (kv.length > 1) {
-                map.put(kv[0], kv[1]);
-            } else {
-                map.put(kv[0], null);
-            }
-        }
-        return map;
-    }
-
     /**
      * 字符串转换方法 把字节数组转换成16进制字符串
      *
@@ -254,8 +219,8 @@ public final class StrUtil {
     /**
      * 对ID（32位）进行编码
      *
-     * @param id
-     * @return
+     * @param id 32位ID
+     * @return 编码后的64位ID
      */
     public static String codeId(String id) {
         if (id == null || id.length() != 32) {
@@ -282,8 +247,8 @@ public final class StrUtil {
     /**
      * 对ID（32位）进行解码
      *
-     * @param coded
-     * @return
+     * @param coded 编码后的64位ID
+     * @return 解码后的32位ID
      */
     public static String decodeId(String coded) {
         if (coded == null || coded.length() != 64) {
@@ -297,6 +262,40 @@ public final class StrUtil {
         return id.toString();
     }
 
+    /**
+     * 解析aa=bb&cc=dd&ee=ff格式的字符串，返回HashMap
+     *
+     * @param urlencoded
+     * @return
+     */
+    public static Map<String, String> parseUrlencoded(String urlencoded) {
+        if (isEmpty(urlencoded)) {
+            return null;
+        }
+        String[] entrys = urlencoded.split("&");
+        if (isEmpty(entrys)) {
+            return null;
+        }
+
+        Map<String, String> map = new HashMap<String, String>(16);
+        String[] kv = null;
+        for (String entry : entrys) {
+            if (isEmpty(entry)) {
+                continue;
+            }
+            kv = entry.split("=");
+            if (isEmpty(kv)) {
+                continue;
+            }
+            if (kv.length > 1) {
+                map.put(kv[0], kv[1]);
+            } else {
+                map.put(kv[0], null);
+            }
+        }
+        return map;
+    }
+
     /**
      * map parameters 转url parameters
      *
@@ -370,7 +369,7 @@ public final class StrUtil {
     /**
      * 下划线字符
      */
-    public static final char UNDERLINE = '_';
+    private static final char UNDERLINE = '_';
 
     /**
      * 字符串下划线转驼峰格式
@@ -419,4 +418,69 @@ public final class StrUtil {
         }
         return sb.toString();
     }
+
+    private static final String NEW_LINE = "\n";
+    private static final String ERROR_MESSAGE_FORMAT = "%s.%s(%s:%d)";
+
+    /**
+     * 把异常堆栈信息转化为字符串,同时把所有的errorMessage用\n方式拼接到printStackTrace前面 -> 替代 e.printStackTrace()
+     * <p>使用e.printStackTrace()不能作为字符串处理，本方法可以转换e.printStackTrace()为字符串</p>
+     * <p><b>printStackTrace</b>信息从<i>Caused by:</i>C开始</p>
+     *
+     * @param cause
+     * @return
+     */
+    public static String printStackTraceAndMessage(Throwable cause) {
+        if (cause != null) {
+            StringBuilder msg = new StringBuilder();
+            if (isNotEmpty(cause.getMessage())) {
+                msg.append(cause.getMessage()).append(NEW_LINE);
+            }
+            String causedMsg = printStackTrace(cause, (eMessage) -> {
+                if (isNotEmpty(eMessage)) {
+                    msg.append(eMessage).append(NEW_LINE);
+                }
+            });
+            return msg.append(causedMsg).toString();
+        }
+        return "";
+    }
+
+    /**
+     * 把异常堆栈信息转化为字符串 -> 替代 e.printStackTrace()
+     * <p>使用e.printStackTrace()不能作为字符串处理，本方法可以转换e.printStackTrace()为字符串</p>
+     *
+     * @param cause
+     * @return
+     */
+    public static String printStackTrace(Throwable cause) {
+        return printStackTrace(cause, (eMessage) -> {
+        });
+    }
+
+    private static String printStackTrace(Throwable cause, Consumer<String> consumer) {
+        if (cause != null) {
+            StringBuilder sb = new StringBuilder();
+            String cClass = cause.getClass().getName();
+            String eMessage = cause.getMessage();
+            StackTraceElement[] stackTrace = cause.getStackTrace();
+            Throwable caused = cause.getCause();
+            while (caused != null) {
+                cClass = caused.getClass().getName();
+                eMessage = caused.getMessage();
+                stackTrace = caused.getStackTrace();
+                caused = caused.getCause();
+                consumer.accept(eMessage);
+            }
+            sb.append("Caused by: ").append(cClass).append(": ").append(eMessage).append(NEW_LINE);
+            for (StackTraceElement element : stackTrace) {
+                sb.append("\tat ");
+                sb.append(String.format(ERROR_MESSAGE_FORMAT, element.getClassName(), element.getMethodName(),
+                        element.getFileName(), element.getLineNumber()));
+                sb.append(NEW_LINE);
+            }
+            return sb.toString();
+        }
+        return "";
+    }
 }

src/main/java/com/yexuejc/base/util/SysUtil.java

@@ -3,7 +3,15 @@ package com.yexuejc.base.util;
 import com.google.common.util.concurrent.ThreadFactoryBuilder;
 
 import java.net.URL;
+import java.text.DecimalFormat;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.concurrent.*;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 /**
  * 系统工具类
@@ -14,6 +22,7 @@ import java.util.concurrent.*;
  * @date: 2017/12/28 16:12
  */
 public class SysUtil {
+    private static Logger logger = Logger.getLogger(SysUtil.class.getName());
     private static final String PROJECT_ROOT_PATH = "java.io.tmpdir";
 
     private SysUtil() {
@@ -79,4 +88,116 @@ public class SysUtil {
          */
         void execute();
     }
+
+
+    /**
+     * 获取当前JVM所有线程
+     *
+     * @return
+     */
+    public static List<Thread> getThreadList() {
+        List<Thread> threadList = new ArrayList<>();
+        ThreadGroup currentGroup = Thread.currentThread().getThreadGroup();
+        while (currentGroup.getParent() != null) {
+            currentGroup = currentGroup.getParent();
+        }
+        int activeCount = currentGroup.activeCount();
+        Thread[] threads = new Thread[activeCount];
+        currentGroup.enumerate(threads);
+        for (Thread thread : threads) {
+            threadList.add(thread);
+        }
+        return threadList;
+    }
+
+    /** 线程锁 */
+    private static final Lock THREAD_LOCK = new ReentrantLock();
+    /** 已经等待的时间 */
+    private static final AtomicInteger SLEEP_TIME = new AtomicInteger(0);
+    /** 最大等待3分钟 */
+    private static final int MAX_SLEEP_TIME = 180;
+
+    /**
+     * 通过锁的方式判断jvm的内存，如果超80%就等待（最大3分钟）JVM内存降低到80%再执行
+     */
+    public static void checkJvmMemory() {
+        THREAD_LOCK.lock();
+        try {
+            while (jvmMemoryIsNotExecutable()) {
+                //jvm内存使用率达到80%,阻塞所有线程，最大等待3分钟后放开
+                if (SLEEP_TIME.incrementAndGet() < MAX_SLEEP_TIME) {
+                    TimeUnit.SECONDS.sleep(1);
+                } else {
+                    break;
+                }
+            }
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        } finally {
+            THREAD_LOCK.unlock();
+            SLEEP_TIME.set(0);
+        }
+    }
+
+    /**
+     * jvm内存是否大于80%（不能继续执行）
+     *
+     * @return true:是，false:不是
+     */
+    public static boolean jvmMemoryIsNotExecutable() {
+        Runtime runtime = Runtime.getRuntime();
+        //jvm总内存
+        long jvmTotalMemoryByte = runtime.totalMemory();
+        //jvm最大可申请
+        long jvmMaxMemoryByte = runtime.maxMemory();
+        //空闲空间
+        long freeMemoryByte = runtime.freeMemory();
+
+        double rate = (jvmTotalMemoryByte - freeMemoryByte) * 1.0 / jvmTotalMemoryByte;
+        if (rate >= 0.8) {
+            rate = (jvmTotalMemoryByte - freeMemoryByte) * 1.0 / jvmMaxMemoryByte;
+            if (rate >= 0.8) {
+                //jvm内存使用率达到80%
+                print(jvmTotalMemoryByte, jvmMaxMemoryByte, freeMemoryByte);
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static final DecimalFormat RATE_DECIMAL_FORMAT = new DecimalFormat("#.##%");
+
+    private static void print(long jvmTotalMemoryByte, long jvmMaxMemoryByte, long freeMemoryByte) {
+        if (logger.isLoggable(Level.WARNING)) {
+            String sb = "\n=========================================================" +
+                    "\nThread Name     = " + Thread.currentThread().getName() +
+                    "\nJVM Memory      = " + formatByte(jvmTotalMemoryByte) +
+                    "\nJVM Max Memory  = " + formatByte(jvmMaxMemoryByte) +
+                    "\nJVM Used Memory = " + formatByte(jvmTotalMemoryByte - freeMemoryByte) +
+                    "\nJVM Free Memory = " + formatByte(freeMemoryByte) +
+                    "\nJVM Memory Rate = " + RATE_DECIMAL_FORMAT.format((jvmTotalMemoryByte - freeMemoryByte) * 1.0 / jvmTotalMemoryByte) +
+                    "\n=========================================================";
+            logger.warning(sb);
+        }
+    }
+
+    private static String formatByte(long byteNumber) {
+        //换算单位
+        double format = 1024.0;
+        double kbNumber = byteNumber / format;
+        if (kbNumber < format) {
+            return new DecimalFormat("#.##KB").format(kbNumber);
+        }
+        double mbNumber = kbNumber / format;
+        if (mbNumber < format) {
+            return new DecimalFormat("#.##MB").format(mbNumber);
+        }
+        double gbNumber = mbNumber / format;
+        if (gbNumber < format) {
+            return new DecimalFormat("#.##GB").format(gbNumber);
+        }
+        double tbNumber = gbNumber / format;
+        return new DecimalFormat("#.##TB").format(tbNumber);
+    }
+
 }