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ECLIPSE处理错误:Access restriction: The type JPEGImageEncoder is not accessible..(eclipse content assist 出现错误)

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对于ECLIPSE处理错误:Accessrestriction:ThetypeJPEGImageEncoderisnotaccessible..感兴趣的读者,本文将提供您所需要的所有信息,我们将详细讲

对于ECLIPSE处理错误:Access restriction: The type JPEGImageEncoder is not accessible..感兴趣的读者,本文将提供您所需要的所有信息,我们将详细讲解eclipse content assist 出现错误,并且为您提供关于'Access denied; you need (at least one of) the PROCESS privilege(s) for this operation' when trying to dump tablespaces、@types/passport version 1.0.5 生成新错误:Type Authenticator does not meet the constraint IncomingMessage、Access restriction: is not accessible、Access restriction: The constructor BASE64Encoder(的宝贵知识。

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ECLIPSE处理错误:Access restriction: The type JPEGImageEncoder is not accessible..(eclipse content assist 出现错误)

ECLIPSE处理错误:Access restriction: The type JPEGImageEncoder is not accessible..(eclipse content assist 出现错误)

在Eclipse中处理图片,需要引入两个包:

import com.sun.image.codec.jpeg.JPEGCodec;

import com.sun.image.codec.jpeg.JPEGImageEncoder;

 

报错:Access restriction: The type JPEGImageEncoder is not accessible due to restriction on required library %JAVA_HOME%\lib\rt.jar

 

此时解决办法:Eclipse默认把这些受访问限制的API设成了ERROR。

只要把Windows-Preferences-Java-Complicer-Errors/Warnings里面的Deprecated and restricted API中的Forbidden references(access rules)选为Warning就可以编译通过。

'Access denied; you need (at least one of) the PROCESS privilege(s) for this operation' when trying to dump tablespaces

'Access denied; you need (at least one of) the PROCESS privilege(s) for this operation' when trying to dump tablespaces

如何解决''Access denied; you need (at least one of) the PROCESS privilege(s) for this operation'' when trying to dump tablespaces?

利用--no-tablespaces

见mysqldump-文档

至少需要转储表的 SELECT 权限,转储视图的 SHOW VIEW ,转储触发器的 TRIGGER ,如果不使用 –single-transaction 选项,则需要 LOCK TABLES ,并且(从 MysqL 8.0.21 开始)PROCESS 如果 –不使用 no-tablespaces 选项。如选项描述中所述,某些选项可能需要其他权限。

并查看 param no-tablespaces的文档

–无表空间,-y

此选项抑制 MysqLdump 输出中的所有 CREATE LOGFILE GROUP 和 CREATE TABLESPACE 语句。

解决方法

我正在尝试使用命令备份 mysql

mysqldump -u root -p  database_name > backup.sql

,但它抛出一个错误:

‘Access denied; you need (at least one of) the PROCESS privilege(s) for this operation’ when trying to dump tablespaces

另外,我想备份我的数据库,所有表都单独存储为一个文件。我该怎么做?

mysql 版本 = 5.7.31

@types/passport version 1.0.5 生成新错误:Type Authenticator does not meet the constraint IncomingMessage

@types/passport version 1.0.5 生成新错误:Type Authenticator does not meet the constraint IncomingMessage

也许身份验证器界面发生了变化? 你说的话!? 是的 - 界面更改,版本号仅略有更改!!!

我认为 koa-passport 的 serializeUser 界面可能与对 Passport 所做的更新不同步...在我的世界中 - 界面的重大更改通常意味着主要版本更改。

Passport V1.0.4 以下允许使用通用TUser

serializeUser(fn: (user: TUser,done: (err: any,id?: TID) => void) => void): void;

现在使用护照 V1.0.5,界面更改为限制为 Express.User。 serializeUser(fn: (user: Express.User,id?: TID) => void) => void): void;

Access restriction: is not accessible

Access restriction: is not accessible

最近在做关于图片操作的问题,但是发现在eclipse中,对于某些rt.jar里面的方法访问的时候,会出现错误提示: Access restriction: XXXXXXXXX  is not accessible due to restriction on required library XXXXX
本例的错误信息为 :  程序包com.sun.image.codec.jpeg不存在
一下所引入的包也有可能会发生问题: 例如  import sun.misc.BASE64Decoder;  import com.sun.image.codec.jpeg.JPEGCodec;
会发现有一些解决方案:

解决办法一:
1. Open project properties.
2. Select Java Build Path node.
3. Select Libraries tab.
4. Remove JRE System Library 一次
5. 再次 Add Library JRE System Library

解决方案二:
Window-->Preferences-->Java-->Compiler-->Error/Warnings-->Deprecated and Restricted API  改为 warning

其实如果是操作某些非公开的JDK API的话,会出现这些问题,可以使用上述的解决方案,但是建议使用其他的方案代替,例如下例所给出的解决方案,用scaleImage2 代替 scaleImage 不使用受保护的方法


package com.zy.common.util;

import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.imageio.ImageIO;

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;


public class ImagesUtil {

	/**
     * 缩略图片
     * @param oldpath 原图片
     * @param newpath 新生成的图片存放地址
     * @param wdith   缩略后的宽
     * @param height  缩略后的高
     */
    public static void scaleImage(String oldpath, String newpath, int wdith, int height) {
    	// 获取老的图片
    	File oldimg = new File(oldpath);
		try {
			BufferedImage bi = ImageIO.read(oldimg);
			Image Itemp = bi.getScaledInstance(wdith, height, BufferedImage.SCALE_SMOOTH);
			BufferedImage thumbnail = new BufferedImage(wdith, height, BufferedImage.TYPE_INT_RGB);
			thumbnail.getGraphics().drawImage(Itemp, 0, 0, null);
			// 缩略后的图片路径
			File newimg = new File(newpath);
			//FileOutputStream out = new FileOutputStream(newimg);
			// 绘图
			//JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
			//JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(thumbnail);
			//param.setQuality(1.0f, false);
			//encoder.encode(thumbnail);
			//out.close();
			String formatName = newpath.substring(newpath.lastIndexOf(".") + 1); 
			ImageIO.write(thumbnail,  formatName , new File(newpath) );
			bi.flush();
			bi = null;
		} catch (IOException e) {
			System.out.println(e.getStackTrace());
		}
    }
    
    /**
     * 缩略图片
     * @param oldpath 原图片
     * @param newpath 新生成的图片存放地址
     * @param wdith   缩略后的宽
     * @param height  缩略后的高
     */
    public static void scaleImage2(String oldpath, String newpath, int wdith, int height) {
    	// 获取老的图片
    	File oldimg = new File(oldpath);
		try {
			BufferedImage bi = ImageIO.read(oldimg);
			Image Itemp = bi.getScaledInstance(wdith, height, BufferedImage.SCALE_SMOOTH);
			BufferedImage thumbnail = new BufferedImage(wdith, height, BufferedImage.TYPE_INT_RGB);
			thumbnail.getGraphics().drawImage(Itemp, 0, 0, null);
			// 缩略后的图片路径
			File newimg = new File(newpath);
			FileOutputStream out = new FileOutputStream(newimg);
			// 绘图
			JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
			JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(thumbnail);
			param.setQuality(1.0f, false);
			encoder.encode(thumbnail);
			out.close();
			bi.flush();
			bi = null;
		} catch (IOException e) {
			System.out.println(e.getStackTrace());
		}
    }

}



Access restriction: The constructor BASE64Encoder(

Access restriction: The constructor BASE64Encoder(

Access restriction: The constructor BASE64Encoder() is not accessible due to restriction on required library D:\Program Files\Java\jdk1.6.0_35\jre\lib\rt.jar

在Eclipse中编写Java代码时,用到了BASE64Decoder,import sun.misc.BASE64Decoder;可是Eclipse提示: 
Access restriction : The type BASE64Decoder is not accessible due to restriction on required library C:\Program 
files\java\jre6\lib\rt.jar 
Access restriction : The constructor BASE64Decoder() is not accessible due to restriction on required library C:\Program files\java\jre6\lib\rt.jar 
搞不懂是为什么,最后在http://forums.dzone.com/eclipse/384-access-restriction-problems.html找到答案,只需要在project build path中先移除JRE System Library,再添加库JRE System Library,重新编译后就一切正常了。但是我仍然很疑惑是为什么。。。 
原文见:http://zhoushuyan.cn/java/the-type-base64decoder-is-not-accessible-due-to-restriction-on-required-library/ 

------------------------------ 

Windows -> Preferences -> Java -> Compiler -> Errors/Warnings -> 
Deprecated and trstricted API -> Forbidden reference (access rules): -> change to warning 
  
我这样解决的!

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