Excel导入导出的缓存清理优化，增加close方法，杜绝可能会造成内存泄露的问题。

modules/core/src/main/java/com/jeesite/common/utils/excel/fieldtype/AreaType.java

@@ -5,6 +5,8 @@ package com.jeesite.common.utils.excel.fieldtype;
 
 import java.util.List;
 
+import org.springframework.core.NamedThreadLocal;
+
 import com.jeesite.common.lang.StringUtils;
 import com.jeesite.modules.sys.entity.Area;
 import com.jeesite.modules.sys.utils.AreaUtils;
@@ -12,12 +14,12 @@ import com.jeesite.modules.sys.utils.AreaUtils;
 /**
  * 字段类型转换
  * @author ThinkGem
- * @version 2013-03-10
+ * @version 2018-08-11
  * @example fieldType = AreaType.class
  */
 public class AreaType {
 
-	private static ThreadLocal<List<Area>> cache = new ThreadLocal<>();
+	private static ThreadLocal<List<Area>> cache = new NamedThreadLocal<>("AreaType");
 	
 	/**
 	 * 获取对象值（导入）
@@ -45,4 +47,12 @@ public class AreaType {
 		}
 		return "";
 	}
+	
+	/**
+	 * 清理缓存
+	 */
+	public static void clearCache(){
+		cache.remove();
+	}
+	
 }

modules/core/src/main/java/com/jeesite/common/utils/excel/fieldtype/CompanyType.java

@@ -5,6 +5,8 @@ package com.jeesite.common.utils.excel.fieldtype;
 
 import java.util.List;
 
+import org.springframework.core.NamedThreadLocal;
+
 import com.jeesite.common.lang.StringUtils;
 import com.jeesite.modules.sys.entity.Company;
 import com.jeesite.modules.sys.utils.EmpUtils;
@@ -12,12 +14,12 @@ import com.jeesite.modules.sys.utils.EmpUtils;
 /**
  * 字段类型转换
  * @author ThinkGem
- * @version 2015-03-24
+ * @version 2018-08-11
  * @example fieldType = CompanyType.class
  */
 public class CompanyType {
 
-	private static ThreadLocal<List<Company>> cache = new ThreadLocal<>();
+	private static ThreadLocal<List<Company>> cache = new NamedThreadLocal<>("CompanyType");
 
 	/**
 	 * 获取对象值（导入）
@@ -45,4 +47,11 @@ public class CompanyType {
 		}
 		return "";
 	}
+	
+	/**
+	 * 清理缓存
+	 */
+	public static void clearCache(){
+		cache.remove();
+	}
 }

modules/core/src/main/java/com/jeesite/common/utils/excel/fieldtype/OfficeType.java

@@ -5,6 +5,8 @@ package com.jeesite.common.utils.excel.fieldtype;
 
 import java.util.List;
 
+import org.springframework.core.NamedThreadLocal;
+
 import com.jeesite.common.lang.StringUtils;
 import com.jeesite.modules.sys.entity.Office;
 import com.jeesite.modules.sys.utils.EmpUtils;
@@ -12,12 +14,12 @@ import com.jeesite.modules.sys.utils.EmpUtils;
 /**
  * 字段类型转换
  * @author ThinkGem
- * @version 2013-03-10
+ * @version 2018-08-11
  * @example fieldType = OfficeType.class
  */
 public class OfficeType {
 
-	private static ThreadLocal<List<Office>> cache = new ThreadLocal<>();
+	private static ThreadLocal<List<Office>> cache = new NamedThreadLocal<>("OfficeType");
 	
 	/**
 	 * 获取对象值（导入）
@@ -45,4 +47,11 @@ public class OfficeType {
 		}
 		return "";
 	}
+	
+	/**
+	 * 清理缓存
+	 */
+	public static void clearCache(){
+		cache.remove();
+	}
 }

modules/core/src/main/java/com/jeesite/common/utils/excel/fieldtype/PostListType.java

@@ -5,6 +5,8 @@ package com.jeesite.common.utils.excel.fieldtype;
 
 import java.util.List;
 
+import org.springframework.core.NamedThreadLocal;
+
 import com.jeesite.common.collect.ListUtils;
 import com.jeesite.common.lang.StringUtils;
 import com.jeesite.common.utils.SpringUtils;
@@ -14,13 +16,13 @@ import com.jeesite.modules.sys.service.PostService;
 /**
  * 字段类型转换
  * @author ThinkGem
- * @version 2015-03-24
+ * @version 2018-08-11
  * @example fieldType = PostListType.class
  */
 public class PostListType {
 
 	private static PostService postService = SpringUtils.getBean(PostService.class);
-	private static ThreadLocal<List<Post>> cache = new ThreadLocal<>();
+	private static ThreadLocal<List<Post>> cache = new NamedThreadLocal<>("PostListType");
 
 	/**
 	 * 获取对象值（导入）
@@ -53,4 +55,11 @@ public class PostListType {
 		}
 		return "";
 	}
+	
+	/**
+	 * 清理缓存
+	 */
+	public static void clearCache(){
+		cache.remove();
+	}
 }

modules/core/src/main/java/com/jeesite/modules/sys/interceptor/LogInterceptor.java

@@ -22,12 +22,12 @@ import com.jeesite.modules.sys.utils.UserUtils;
 /**
  * 日志拦截器
  * @author ThinkGem
- * @version 2014-8-19
+ * @version 2018-08-11
  */
 public class LogInterceptor extends BaseService implements HandlerInterceptor {
 
 	private static final ThreadLocal<Long> startTimeThreadLocal =
-			new NamedThreadLocal<Long>("ThreadLocal StartTime");
+			new NamedThreadLocal<Long>("LogInterceptor StartTime");
 	
 	@Override
 	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, 

modules/core/src/main/java/com/jeesite/modules/sys/service/EmpUserService.java

@@ -116,8 +116,7 @@ public class EmpUserService extends CrudService<EmpUserDao, EmpUser> {
 		int successNum = 0; int failureNum = 0;
 		StringBuilder successMsg = new StringBuilder();
 		StringBuilder failureMsg = new StringBuilder();
-		try {
-			ExcelImport ei = new ExcelImport(file, 2, 0);
+		try(ExcelImport ei = new ExcelImport(file, 2, 0)){
 			List<EmpUser> list = ei.getDataList(EmpUser.class);
 			for (EmpUser user : list) {
 				try{

modules/core/src/main/java/com/jeesite/modules/sys/web/user/EmpUserController.java

@@ -177,8 +177,9 @@ public class EmpUserController extends BaseController {
 		}
 		List<EmpUser> list = empUserService.findList(empUser);
 		String fileName = "用户数据" + DateUtils.getDate("yyyyMMddHHmmss") + ".xlsx";
-		new ExcelExport("用户数据", EmpUser.class).setDataList(list)
-				.write(response, fileName).dispose();
+		try(ExcelExport ee = new ExcelExport("用户数据", EmpUser.class)){
+			ee.setDataList(list).write(response, fileName);
+		}
 	}
 
 	/**
@@ -196,8 +197,9 @@ public class EmpUserController extends BaseController {
 		}
 		List<EmpUser> list = ListUtils.newArrayList(empUser);
 		String fileName = "用户数据模板.xlsx";
-		new ExcelExport("用户数据", EmpUser.class, Type.IMPORT).setDataList(list)
-				.write(response, fileName).dispose();
+		try(ExcelExport ee = new ExcelExport("用户数据", EmpUser.class, Type.IMPORT)){
+			ee.setDataList(list).write(response, fileName);
+		}
 	}
 
 	/**

modules/core/src/main/resources/views/modules/sys/sysDesktop.html

@@ -60,7 +60,7 @@
 	<!-- /.row -->
 	<div class="row">
 		<div class="col-md-12">
-			<div class="box">
+			<div class="box box-widget">
 				<div class="box-header with-border">
 					<h3 class="box-title">月度报告</h3>
 					<div class="box-tools pull-right">