Date cannot be resolved to a type是什么原因?

effortday 2013-07-09 08:44:44

我用的myeclipse8.6的集成环境，就导入了一个包就报Date cannot be resolved to a type这个错误？下面是源代码。<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="java.util.Date"%>

...全文

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一叶飞舟 2013-07-09

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myeclipse导入jre所有的jar包，指定jre环境

花谢尊前不敢香 2013-07-09

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要看你下面如何使用date的

菖蒲老先生 2013-07-09

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这个不应该报错的，jdk的jar包是自动引入的。

=============================== ==注意：一共2个压缩包，这是第2个== =============================== DevExpress VCL v2012 vol 1.6 包含所有源码、例子、帮助如果你安装过其它版本的DevExpressVCL，安装前请完全卸载老版本的Dev控件，并执行“清理Dev残余文件”，清理System32下的DevExpress的BPL文件。 What's New in DevExpress VCL 12.1.6 Release Notes The following sections list

=============================== ==注意：一共2个压缩包，这是第1个== =============================== DevExpress VCL v2012 vol 1.6 包含所有源码、例子、帮助如果你安装过其它版本的DevExpressVCL，安装前请完全卸载老版本的Dev控件，并执行“清理Dev残余文件”，清理System32下的DevExpress的BPL文件。 What's New in DevExpress VCL 12.1.6 Release Notes The following sections list all minor and major changes in DevExpress VCL 12.1.6. Note that products, controls and libraries which aren't mentioned in the list below are included in the unified installer for compatibility, but have not been updated. New Features/Changes ExpressLayout Control S170028 - Documentation - Describe runtime object access capabilities in the "On-Form Object Access" topic S170040 - Documentation - Update the "ExpressLayout Control: Resource Strings" topic with resource strings used in customization context menus ExpressTile Control S170009 - Add the capability to determine if a specific point corresponds to a tile control's title using HitTest information Resolved Issues VCL Subscription Q434991 - Data-aware container controls - Format settings are not applied to cells ExpressBars Suite Q440463 - Ribbon - TdxBarApplicationMenu - Check marks displayed for TdxBarLargeButton items appear highly pixelated Q441061 - Ribbon - TdxRibbonBackstageView opened in a new Ribbon Form created in an application remains visible on screen if this Ribbon Form is closed via its Close button Q425185 - Ribbon Form - Incorrect text color is applied to a maximized form's caption B219006 - TcxBarEditItem - LookupComboBox - An error occurs when moving focus from one lookup bar item to another ExpressDocking Library Q440931 - TdxDockPanel is not activated by clicking the panel's tab in TdxTabContainerDockSite ExpressLayout Control Q434679 - A layout group fires the OnTabChanging event twice if the event's handler calls Application.ProcessMessages Q433283 - A layout group with a label layout item that is set to occupy the entire client area of its group has an incorrect width B218895 - Documentation - Incorrect topic navigation due to a corrupt HLP file (Delphi 7 only) ExpressPrinting System Q440760 - Export to PDF - The File Save dialog is not shown if the default file name for a report is too long B218629 - In the Page Number Format dialog, the "Start At" field value is incorrectly validated for character-based number formats B218627 - TBasedxReportLink descendants - Customized values of the TimeFormat, DateFormat and PageFormat properties are reset to their default values in some cases if default formats have been customized at the TdxComponentPrinter level Q440453 - TdxComponentPrinter - The Date And Time dialog cannot be re-opened after the last time format has been selected in the Available Time Formats list Q435027 - The Print Preview window freezes when invoked from a window located in a DLL file B219022 - TreeList Report Link - Rich text formatting is missing when printing cxRichEdit columns ExpressQuantumGrid Suite Q404033 - An exception is thrown when the selection is modified within the View's OnSelectionChanged event handler Q430561 - Assigning a Table View column to a Layout View data item or Card View row modifies the assignee's GroupIndex property Q434910 - Compilation errors occur after the View's Navigator.InfoPanel.OnClick event handler has been created at design time due to the missing cxNavigator unit in the 'uses' clause Q437880 - Data-aware Views - The "RecordIndex out of range" exception is thrown when removing a record if the View contains unbound columns Q433982 - Data-aware Views - The "RowIndex out of range" exception is thrown when updating the TClientDataSet bound to the View within a form's OnDestroy event handler using EmptyDataSet, etc. B218884 - Layout View - Card captions and currently focused items are incorrectly painted in selected cards B218883 - Layout View - Cell content areas are hot-tracked regardless of the View's OptionsBehavior.ItemHotTrack property value B218885 - Layout View - The text color specified in the View's Styles.OnGetItemStyle event handler is not applied to card layout items Q438267 - Server Mode - Clicking a Filter Row cell in a column containing Null values throws the "Could not convert variant of type (Null) into type (OleStr)" exception Q435475 - Tabular and Layout Views - The View does not synchronize edit value changes with the data controller in the OnEditChanged event handler if DataController.Options includes dcoImmediatePost, and a grid item's Properties.ImmediatePost property is set to True ExpressQuantumTreeList Suite Q434260 - TcxDBTreeList refreshes all data if a bound dataset was edited via the TreeList control when the OptionsData.SmartRefresh property is set to True Q435693 - TcxTreeList - An AV occurs when adding nodes in RAD Studio XE3 at design time ExpressScheduler Suite Q431232 - cxDateNavigator - The date navigator does not maintain the number of selected weeks always visible on screen when scrolling months backwards Q433746 - Day View - Resizing an event that lasts more than one day past 11:59pm increases the event's duration by one day if the ShowAllDayEventsInContentArea property is set to True ExpressSkins Library Q435604 - TdxBevel - Additional colors are not defined for the control in the Blueprint, DevExpressStyle, Seven, SevenClassic, VS2010, and Whiteprint skins Q436337 - The Skin Editor does not generate skin packages for RAD Studio XE3 ExpressSpreadSheet B218380 - The TcxSSViewInfoData record fields in the cxSSViewInfo.hpp file generated by a C++Builder application have an invalid alignment ExpressTile Control Q432087 - cxDateEdit controls are not displayed on a detail page when activating this page for the second and subsequent times in Windows XP B218389 - Focus does not move to the previous/next row when it passes the first/last tile within the current row if a tile control's OptionsBehavior.FocusItemOnCycle property is set to True ExpressVerticalGrid Suite Q439250 - Closing the Customization form does not disable the customization mode in error Common Libraries ExpressEditors Library Q431767 - TdxDBBreadcrumbEdit does not update its content after a new record is inserted into a database table in XE2 Update 4 Q434043 - Background and text colors are not applied to a read-only editor if its Properties.ReadOnly property is set via RepositoryItem Q434045 - cxMemo - Scrollbars are not shown if the editor is the last object in a DFM file, the editor has no text, and its Properties.ScrollBars property is set to ssBoth at design time B218869 - dxBreadCrumbEdit - A node's DeleteChildren method does not update the node's HasChildren property Q437728 - dxBreadcrumbEdit - An AV occurs when clicking the Root in a node's drop-down window when the selected node's children are repopulated within an OnPathSelect event handler B213307 - ExpressEditors are erroneously painted by VCL styles, as if they are standard VCL editors Q436036 - Some editors discard changes to the edit value if these changes were made by pasting data from the clipboard, using the Backspace key, etc. Q433948 - TcxImage - Intersections with other transparent DevExpress editors may appear distorted Q440954 - TcxScrollBox - The Create method does not use the GetViewInfoClass method Q436691 - TcxShellBrowserDialog - Memory leaks when selecting a file or folder in the dialog and clicking the OK button Q432788 - TcxSplitter - In Delphi 2010 and later, changes to the AlignSplitter property erroneously cause form resizing Q434498 - TdxShellBreadcrumbEdit - An AV occurs when selecting a file in a linked shell tree view B218303 - TdxShellBreadcrumbEdit - Files selected in a linked shell tree view are added as nodes (folders) to the breadcrumb editor ExpressLibrary Q432285 - TdxScreenTip - An AV occurs when displaying hints for ExpressQuantumGrid cells after ScreenTips have been shown by hint controllers located on other forms

================================== ==注意：一共2个压缩包，这是第1个== ================================== *提示：无自动安装程序，包含所有源码、例子、帮助，请按照安装顺序安装！！！ New Features in 13.1.4 (VCL Product Line) Breaking Changes To learn about breaking changes in this version, please refer to the following page: Breaking Changes in 13.1.4 (VCL Product Line) Known Issues To learn about known issues in this version, please refer to the following page: Known Issues in 13.1.4 (VCL Product Line) The following sections list all minor and major changes in DevExpress VCL 13.1.4. Note that products, controls and libraries which aren't mentioned in the list below are included in the unified installer for compatibility, but have not been updated. Enhancements and Updates New Features/Updates VCL Subscription ExpressTile Control ExpressDataController Resolved Issues ExpressBars Suite ExpressLayout Control ExpressNavBar ExpressPageControl ExpressPivotGrid Suite ExpressPrinting System ExpressQuantumGrid Suite ExpressQuantumTreeList Suite ExpressScheduler Suite ExpressSkins Library ExpressSpreadSheet ExpressTile Control ExpressVerticalGrid Suite ExpressDataController ExpressEditors Library ExpressLibrary Installation (VCL) New Features/Updates VCL Subscription S170932 - Documentation - Describe that the ExpressLayout Control and ExpressDocking Library are incompatible ExpressTile Control S172299 - Center the Back button and title text vertically within the title Common Libraries ExpressDataController S172107 - Add the capability to disable multi-threaded operations at the level of custom data sources (TcxCustomDataSource descendants) Resolved Issues ExpressBars Suite Q476901 - Documentation - The "Ribbon Application Menu" topic does not contain the menu creation steps that are specific to TdxRibbonBackstageView Q452658 - Documentation - The TdxCustomRibbonGalleryItem.GalleryGroups property is not marked as deprecated and is used in topics instead of TdxCustomRibbonGalleryItem.GalleryCategories Q513198 -

Core name: Xilinx LogiCORE Serial RapidIO Version: 5.5 Release Date: April 19, 2010 ================================================================================ This document contains the following sections: 1. Introduction 2. New Features 3. Supported Devices 4. Resolved Issues 5. Known Issues 6. Technical Support 7. Other Information (optional) 8. Core Release History 9. Legal Disclaimer ================================================================================ 1. INTRODUCTION For the most recent updates to the IP installation instructions for this core, please go to: http://www.xilinx.com/ipcenter/coregen/ip_update_install_instructions.htm For system requirements: http://www.xilinx.com/ipcenter/coregen/ip_update_system_requirements.htm This file contains release notes for the Xilinx LogiCORE IP Serial RapidIO v5.5 solution. For the latest core updates, see the product page at: http://www.xilinx.com/rapidio/ 2. NEW FEATURES - ISE 12.1 software support - Designed to RapidIO Interconnect Specification v2.1 - Virtex-6 LXT/HXT/SXT 5.0 Gbps support - Spartan-6 3.125 Gbps and 4x support - Expanded simulator support - Support for ML505, ML605 and SP605 boards (see Release Notes AR for details) 3. SUPPORTED DEVICES - Virtex-6 LXT/HXT/SXT/CXT - Spartan-6 LXT - Virtex-5 LXT/FXT/SXT - Virtex-4 FX 4. RESOLVED ISSUES - PHY does not properly pass CRF bit to Buffer - Version fixed : v5.5 - CR# 519603 - Updated PHY to properly pass CRF - GT settings for Spartan-6 and Virtex-6 updated based on characterization - Version fixed : v5.5 - PORT_INITIALIZED toggles indefinitely - Version fixed : v5.5 - CR# 551271 - GT wrappers updated so that the core will detect invalid data until RESETDONE asserts. - Processing Element Features CAR implemented incorrectly - Version fixed : v5.5 - CR# 528369 - Part of the PEF CAR was implemented in the PHY configuration space, now it is merged into the LOGIO configuration space as directed by the spec. See core User Guide for map of configuration space. - Recommended modifications to Example Design reset scheme - Version fixed : v5.5 - CR# 533208, 533209, 533212 - Updated reset sequence, see AR# 33574 for specifics. - Example design "implement.bat" file has error - Version fixed : v5.5 - CR# 533796 - Corrected syntax for NGDBuild command. - Virtex-6 clock modules not using production MMCM settings - Version fixed : v5.4rev1 - CR#546021 - Using outdated values from the clocking wizard in clock modules. - Buffer BRAM using READ_FIRST mode - Version fixed : v5.4rev1 - CR#546424 - Using READ_FIRST mode for buffer BRAMs - need to update to WRITE_FIRST mode for Spartan-6 and Virtex-6 based on characterization. - VHDL example design simulation error when CRF bit de-selected - Version fixed : v5.4rev1 - CR# 532020 - Updated example design so that CRF signals not added when CRF support is disabled. - Virtex-6 bring-up issues - Version fixed : v5.4 - CR#527725, CR#525309, CR#531695 - Using integer values for the MMCM_ADV, regenerated Virtex-6 wrappers based on general hardware characterization results, revised reset sequence. Please see core Release Notes for updates. - GUI settings incorrect or not properly reflected in hardware. - Version fixed : v5.4 - CR#507334, CR#528369, CR#528370 / AR#32122 - The following register fields were corrected: Re-transmit Suppression mask, Logical Layer extended features pointer, DeviceVendorID. - Latches inferred in VHDL example design - Version fixed: v5.2 - CR#509670 / AR#32189 - Added intermediate values for partial register and combinational assignments. - lnk_trdy_n does not assert in evaluation core simulations - Version fixed : v5.1rev1 - CR#493479 / AR#31864 - Modified initial state in evaluation cores. - PHY won't generate stand-alone due to missing module - Version fixed : v5.1rev1 - CR#493162 / AR#31834 - Shared file between buffer and log added to buffer file list. - Virtex-4 core has long initialization time - Version fixed : v5.1rev1 - CR#481684 / AR#31617 - Virtex-4 initSM modified to prevent branch to silent when RX PCS resets in DISCOVERY state. - LogIO local arbitration doesn't account for valid causing re-arbitration prior to legitimatepacket completion. - Version fixed : v5.1 - CR#478748 - Valid used to gate mresp_eof_n and iresp_eof_n for local arbitration. - A ireq_dsc_n asserted for an undefined packet type does not get propogated by the logical layer. - Version fixed : v5.1 - CR#478541 - undefined packet type decode now passes dsc to buffer allowing packet to be dropped. - 16-bit deviceID cores may see a maintenance response transaction presented but not validated on the IResp interface resulting in a lost transaction. by the logical layer. - Version fixed : v5.1 - CR#474894 - Fixed issue when the maintenance response is followed immediatly by a single DWord SWrite packet. - SourceID not configureable for IReq port. - Version fixed : v5.1 - CR#473938 - Added ireq_src_id port to logical layer. All transmit source IDs should now be configureable and all received destination IDs observable. - Write enables into LogIO registers aren't allowing partial register writes. - Version fixed : v5.1 - CR#473441 - Write enables now implementedfor all LogIO registers allowing byte-wise writes of CSRs such as the deviceID register and BAR. - Message response transaction received as a user defined packet type using 16-bit device IDs appears as a corrupted packet on the IResp interface. - Version fixed : v5.1 - CR#473400, CR#473693 - Fixed LogIO RX to properly handle all user-defined types. - PHY core does not dsc upon retry when coincident with TX packet eof resulting in potential buffer lock-up - Version fixed : v4.4rev2 - CR#478246 / AR#31407 - lnk_tdst_dsc_n now asserted for all retry and error scenarios. - Retry of packet being sent causes packet to get stuck in buffer - Version fixed : v4.4rev2 - CR#477217 / AR#31318 - No longer applicable, v5.1 introduces new buffer. - Core accepts muddled packet when reinitializing during packet receipt - Version fixed : v4.4rev1 - CR#477115 / AR#31308 - Core PNAs packet in receipt when link goes down. - Core LCSBA implementation removes 64MB of possible addressing space. - Version fixed : v4.4 - CR#472992 / AR#30939 - Use 10-bit mask with full 34-bit address for LCSBA intercept. - CRC error on stalled packet - Version fixed : v4.4 - CR#469678 / AR#30940 - Fixed condition which loaded in new CRC sequence on a stall just after sof received by PHY. This is a non-concern for Xilinx buffer users. - Virtex-4 4x core may intermittenly train down to 1x mode - Version fixed : v4.4 - CR#467616 / AR#30314 - Modified oplm_pcs_rst_sequence.v file supplied with the core to register asynchronous TXLOCK and RXLOCK signals. - Re-initialization not forced following a change to Port Width Override - Version fixed : v4.4 - CR#459427 / AR#30323 - Modified PHY Layer to detect a change in the port width override field and reinitialize when updated. - Messaging packets providing incorrect treq_byte_count value - Version fixed : v4.4 - CR#467116 / AR#30320 - Modified Logical Layer to properly decode Messaging size field. Modified testbench to properly check byte count for messaging type packets. - 8-bit SWrite transactions usign 16-bit deviceIDs suffer lost eofs - Version fixed : v4.4 - CR#467668 / AR#30322 - Modified Logical Layer to properly forward eof through the pipeline. - Some Logical Layer CARs are not being set correctly in the core. - Version fixed : v4.4 - CR#458414 / AR#30054 - The following Logical Layer CARs are not being set correctly in the core: - Assembly Information CAR (offset 0xC) - ExtendedFeaturesPtr portion - Processing Element Features CAR (offset 0x10) - Switch Port Information CAR (offset 0x14) - Destination Operations CAR (offset 0x1C) - Switch Route Table Destination ID Limit CAR (offset 0x34) - Core does not have functionality to enable the user to drop unintended packets based on Device ID. - Version fixed: v4.3. - CR#455552 - Added a new port called deviceid which indicates the current Device ID value stored in the Base Device ID CSR. - Receive side buffer design may corrupt packets - user may see corrupted packets from the logical layer when many small packets cause the status FIFO to fill. - Version fixed: v4.2 - CR#447884 / AR#29263 - No longer applicable, v5.1 introduces new buffer. - Repeated, transmitted packet accepted control symbols referencing the same AckID cause loss of AckID sync - The user will see this as potentially duplicated received packets which ultimately result in a port error condition. - Version fixed: v4.2 - CR#444561 / AR#29233 - Modified the transmit encoder to send a single packet accepted symbol per back-to-back control symbol. - Stomped packet sent after RFR (Restart-from-Retry)control symbol - The user will occasionally see error recovery on a retry which will affect system bandwidth. - Version fixed: v4.2 - CR#435188 / AR#24837 - Modified the PHY interface to kill a packet if discontinued on eof and prevent entry to the buffer. 5. KNOWN ISSUES The following are known issues for v5.5 of this core at time of release: - NGDBuild errors when using ISE GUI unless XST Keep Hierarchy set to Soft - Version to be fixed : Fix Not Scheduled - CR#534514 / AR#33528 - Please reference the Answer Record for additional information and recommendations. - Virtex-4 FX 3.125G, 4x core may not meet timing. - Version to be fixed : Fix Not Scheduled - CR#506364 / AR#32195 - Please reference the Answer Record for additional information and recommendations. - Unable to traindown to x1 mode in Lane 2. - Version to be fixed : Fix Not Scheduled - CR#457109 / AR#30023 - Traindown in Lane 0 works successfully but the Serial RapidIO endpoint is unable to traindown to Lane 2. The RocketIO transceivers only allow traindown to the channel bonding master. - Core reinitialization during error recovery causes recoverable protocol error. - Version to be fixed : Fix Not Scheduled - CR#457885 / AR#30021 - This is an corner condition that could occur if core is forced to reinitialize (i.e. - force_reinit) while it is in the process of error recovery. If this condition occurs, packets will be sent during recovery's quiet period. This situation is recoverable. - Post-Synplicity synthesis implementation runs may exhibit ucf failures - Version to be fixed : Fix Not Scheduled - CR#447782 / AR#29522 - Synplicity generated net names are not consistent with XST generated names and may not be consistent between core types. The .ucf file must be edited in these failure cases. Please reference the Serial RapidIO v5.1 web Release Notes for suggested work around. - PNA cause field may occasionally reflect a reserved value - Version to be fixed : Fix Not Scheduled - CR#436767 / AR#24982 - The cause field is for debug purposes only and will not affect functionality. Occurrence is rare and requires alignment of multiple control symbols. - Control Symbols may be lost on reinit - Version to be fixed : Fix Not Scheduled - CR#436768 / AR#24970 - This is an unusual and ultimately recoverable error. Set the "Additional Link Request Before Fatal" value on the Physical Configuration page of the GUI to "4" in order to prevent a lost Link Request or Link Response from causing the core to enter the port error state. - Logical Rx does not support core side stalls - Version to be fixed : Fix Not Scheduled - CR#436770 / AR#24968 - The rx buffer must provide packets to the logical layer without buffer induced stall cycles. The buffer reference design provided with the core is a store and forward buffer and complies with this rule. The most recent information, including known issues, workarounds, and resolutions for this version is provided in the IP Release Notes Guide located at www.xilinx.com/support/documentation/user_guides/xtp025.pdf 6. TECHNICAL SUPPORT To obtain technical support, create a WebCase at www.xilinx.com/support. Questions are routed to a team with expertise using this product. Xilinx provides technical support for use of this product when used according to the guidelines described in the core documentation, and cannot guarantee timing, functionality, or support of this product for designs that do not follow specified guidelines. 7. OTHER INFORMATION - N/A 8. CORE RELEASE HISTORY Date By Version Description ================================================================================ 04/2010 Xilinx, Inc. 5.5 5.0 Gbps support 03/2010 Xilinx, Inc. 5.4 Revision 1 11.5 support/Patch Release 09/2009 Xilinx, Inc. 5.4 Spartan-6 support 06/2009 Xilinx, Inc. 5.3 Virtex-6 support 04/2009 Xilinx, Inc. 5.2 11.1i support 11/2008 Xilinx, Inc. 5.1 Revision 1 Patch Release 09/2008 Xilinx, Inc. 5.1 New Buffer LogiCore 07/2008 Xilinx, Inc. 4.4 Revision 2 Patch Release 07/2008 Xilinx, Inc. 4.4 Revision 1 Patch Release 06/2008 Xilinx, Inc. 4.4 Bug Fixes 03/2008 Xilinx, Inc. 4.3 10.1i support 10/2007 Xilinx, Inc. 4.2 9.2i support 02/2007 Xilinx, Inc. 4.1 9.1i support 02/2006 Xilinx, Inc. 3.1 Revision 1 Patch Release 01/2006 Xilinx, Inc. 3.1 8.1i support ================================================================================ 9. Legal Disclaimer (c) Copyright 2006 - 2010 Xilinx, Inc. All rights reserved. This file contains confidential and proprietary information of Xilinx, Inc. and is protected under U.S. and international copyright and other intellectual property laws. DISCLAIMER This disclaimer is not a license and does not grant any rights to the materials distributed herewith. Except as otherwise provided in a valid license issued to you by Xilinx, and to the maximum extent permitted by applicable law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and (2) Xilinx shall not be liable (whether in contract or tort, including negligence, or under any other theory of liability) for any loss or damage of any kind or nature related to, arising under or in connection with these materials, including for any direct, or any indirect, special, incidental, or consequential loss or damage (including loss of data, profits, goodwill, or any type of loss or damage suffered as a result of any action brought by a third party) even if such damage or loss was reasonably foreseeable or Xilinx had been advised of the possibility of the same. CRITICAL APPLICATIONS Xilinx products are not designed or intended to be fail- safe, or for use in any application requiring fail-safe performance, such as life-support or safety devices or systems, Class III medical devices, nuclear facilities, applications related to the deployment of airbags, or any other applications that could lead to death, personal injury, or severe property or environmental damage (individually and collectively, "Critical Applications"). Customer assumes the sole risk and liability of any use of Xilinx products in Critical Applications, subject only to applicable laws and regulations governing limitations on product liability. THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS PART OF THIS FILE AT ALL TIMES.

今天在写mybatis测试代码，其中用到日期变量。编写如下代码后便报错：Type Date cannot be resolved to a type。 private Date datetime; 后来查看到Date 在两个包中都用定义。 java.uti.Date 和 java.sql.Date。因此，如果出现两个包中都有定义的情况下，编译器便会报如上错误。在使用时...

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