在以下情况下,应将哪些响应代码传递给客户端？
我选择了403.我也发现以下我认为可以使用.
维基百科:
412前提条件失败:服务器不满足请求者对请求提出的前提条件之一
如果我应该使用除403以外的代码,建议代码.
我正在使用的业务应用程序angularJS.我的一个服务方法返回我byte[](包括PDF文件内容)现在我需要下载此文件作为PDF客户端机器使用JavaScript.
如何使用HTML5 Apis或任何JavaScript API？
我用过 window.atob(base64String)
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
但得到以下错误 Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded.
System.arraycopy(Object src, int srcPos, Object dest, int destPos, int length) 是一种本地方法.
这种方法的时间复杂度是多少？
我无法在apache中更改我的Web根目录,由于某种原因它指向/ Sites/folder1/folder2而不是指向/ Sites.我配置并更改了我的apache
<Directory "/Users/saad/Sites">并
DocumentRoot /Users/saad/Sites
重新启动了我的apachectl但仍然没有.
我有一个类没有从ListActivity扩展,所以我怎么能没有错误地替换这个代码？
SimpleCursorAdapter adapter = new SimpleCursorAdapter(
this,
R.layout.sbooks_row,
cursor, from,
to
);
setListAdapter(adapter);
我们有getter的lambda表达式如下:
Function<Student, String> studentNameGetter = Student::getName;
如何设置setter的lambda表达式？
决定在java.lang.Object中包含这些方法的原因是什么？对于许多类来说,平等和散列是没有意义的.
制作两个接口更合乎逻辑:
interface Equalable {
boolean equals(Equalable other);
}
interface Hashable extends Equalable {
int hashCode();
}
例如,HashSet定义可能看起来像
class HashSet<T extends Hashable> ...
它可以防止常见的初学者错误之一 - 使用一组项而不实现equals/hashCode.
我使用JDK日志记录作为日志框架,SLF4J作为简单的外观.当我记录不同级别的日志时,我有一些疑问.
SLF4J具有以下日志级别
跟踪(最不严重)
调试
信息
警告
错误
致命(最严重)
JDK日志记录具有以下日志级别
严重(最高值)
警告
INFO
CONFIG
FINE
FINER
FINEST(最低值)
如果我想将日志级别设置为DEBUG,那么在JDK日志记录中该级别不可用.任何人都可以解释一下我们如何在这种情况下获得DEBUG级别的日志记录.我们是否需要针对这种情况进行任何其他配置？
更新
这是我的属性文件配置
handlers = com.amc.logging.handlers.DebugLogHandler
com.amc.logging.handlers.DebugLogHandler.pattern = c:/logs/debug_log.log com.amc.logging.handlers.DebugLogHandler.level = FINE com.amc.logging.handlers.DebugLogHandler.formatter = java.util.logging .SimpleFormatter com.amc.logging.handlers.DebugLogHandler.append = true
请让我知道我哪里出错了.
我已/etc/mysql/my.cnf手动配置使用utf8.见下文:
[mysqld]
character-set-server=utf8
character-sets-dir=/usr/share/mysql/charsets
[mysql]
character-sets-dir=/usr/share/mysql/charsets default-character-set=utf8
[mysqladmin]
character-sets-dir=/usr/share/mysql/charsets default-character-set=utf8
[mysqlcheck]
character-sets-dir=/usr/share/mysql/charsets default-character-set=utf8
[mysqldump]
character-sets-dir=/usr/share/mysql/charsets default-character-set=utf8
[mysqlimport]
character-sets-dir=/usr/share/mysql/charsets default-character-set=utf8
[mysqlshow]
character-sets-dir=/usr/share/mysql/charsets default-character-set=utf8
[client]
character-sets-dir=/usr/share/mysql/charsets default-character-set=utf8
从控制台:
mysql> show variables like 'char%';
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| …