我知道MySQL有默认的latin1编码,显然需要1个字节来存储latin1和3个字节的字符来存储utf-8中的字符- 这是正确的吗?
我正在开发一个我希望将在全球范围内使用的网站.我绝对需要utf-8吗?或者我可以使用latin1逃脱?
此外,我试图将一些表从latin1更改为utf8,但我收到此错误:
Speficief key was too long; max key length is 1000 bytes
有没有人知道这个解决方案?我应该真的解决这个问题,还是拉丁1就够了?
谢谢,亚历克斯
我在我的服务器上上传了我的war文件,它在部署后完美运行,但一段时间后它显示异常.我正在使用struts2和hibernate
我hibernate.cfg.xml是
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/dbName</property>
<property name="hibernate.connection.username">UserName</property>
<property name="hibernate.connection.password">Password</property>
<property name="hibernate.connection.zeroDateTimeBehavior">round</property>
<property name="autoReconnect">true</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="maxIdleTime">0</property>
<property name="use_sql_comments">true</property>
<property name="hibernate.connection.pool_size">20</property>
<property name="hibernate.current_session_context_class">org.hibernate.context.ThreadLocalSessionContext</property>
<property name="current_session_context_class">thread</property>
</session-factory>
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在控制台上执行查询后,它显示如下 Exception
263512233 [http-bio-12414-exec-1768] WARN org.hibernate.util.JDBCExceptionReporter - SQL Error: 0, SQLState: 08003
263512233 [http-bio-12414-exec-1768] ERROR org.hibernate.util.JDBCExceptionReporter - No operations allowed after connection closed.Connection was implicitly closed by the driver.
org.hibernate.exception.JDBCConnectionException: could not execute query
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:99)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.loader.Loader.doList(Loader.java:2545)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2276)
at org.hibernate.loader.Loader.list(Loader.java:2271)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:459) …Run Code Online (Sandbox Code Playgroud) 我一直在研究Java Web应用程序,我在Netbeans 7.3上使用SmartGwt,突然间我遇到了这个问题.我尝试清理然后重新启动IDE,我应该说我对此知之甚少.有人可以告诉我为什么它会出错并且我如何解决这个问题?build-impl.xml
错误消息说:
nbproject/build-impl.xml:1031: The module has not been deployed. See the server log for details.
BUILD FAILED (total time: 4 seconds)
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注意:我使用的是Tomcat 7.0.34
我正在运行带有Tomcat的Eclipse 3.5(从WTP集成),我希望在txt中看到输出日志而不仅仅是控制台
无法在我的eclipse /工作区或本地Tomcat 6安装目录中找到它
任何线索如何启用这些?
我也启用org.apache.catalina.valves.RequestDumperValve了输出并在控制台上滚动,我希望在txt中看到
我找不到关于这个主题的很多信息.有人可以解释一下Hibernate session.getTransaction().begin(与session.beginTransaction()vs 之间的差异吗?session.beginTransaction().begin()
我为这两个应用程序添加了SSL.
假设https:// www.a.com和https:// www.b.com.
https:// www.a.com正在通过调用访问wcf服务.我也在使用jsonp这个功能.当这些应用程序不是https时,它工作正常.但是当我将其设为https时,呼叫失败了.它在此次调用中给出了firebug中的"Internel服务器错误".https:// www.b.com$.ajax()$.ajax()$.ajax()
我们可以在安全模式下做这样的事情吗?
我安装了openldap 2.4.35从源代码压缩包用berkeleydb 5.0.32.NC的CentSO 6.4 x86_64.
运行几天后,ldap服务器意外关闭.这是最后一个日志:
ber_get_next
TLS trace: SSL3 alert read:warning:close notify
52b7b798 ber_get_next on fd 13 failed errno=0 (Success)
52b7b798 conn=1023 op=70 do_unbind
52b7b798 connection_close: conn=1023 sd=13
TLS trace: SSL3 alert write:warning:close notify
52b7cbba daemon: shutdown requested and initiated.
52b7cbba slapd shutdown: waiting for 0 operations/tasks to finish
52b7cbba slapd shutdown: initiated
52b7cbba ====> bdb_cache_release_all
52b7cbba slapd destroy: freeing system resources.
52b7cbba slapd stopped.
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配置文件(slapd.conf):
include /home/ucportal/local/openldap/etc/openldap/schema/core.schema
include …Run Code Online (Sandbox Code Playgroud) 我正在尝试使用bootstrap进行验证。我尝试了这里的解决方案,但它不起作用。
<form id="tryitForm" class="form-horizontal">
<div class="form-group">
<label class="col-md-3 control-label">Full name</label>
<div class="col-md-4">
<input type="text" class="form-control" name="firstName" />
</div>
<div class="col-md-4">
<input type="text" class="form-control" name="lastName" />
</div>
</div>
<div class="form-group">
<label class="col-md-3 control-label">Email address</label>
<div class="col-md-6">
<input type="text" class="form-control" name="email" />
</div>
</div>
<div class="form-group">
<label class="col-md-3 control-label">Gender</label>
<div class="col-md-6">
<div class="radio">
<label><input type="radio" name="gender" value="male" /> Male</label>
</div>
<div class="radio">
<label><input type="radio" name="gender" value="female" /> Female</label>
</div>
<div class="radio">
<label><input type="radio" name="gender" value="other" /> Other</label>
</div> …Run Code Online (Sandbox Code Playgroud) 如何设置Bootstrap Glyphicons作为快捷方式图标?
对于我们使用的网站
<link rel="shortcut icon" href="images/logo-small.jpg">
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如何设置Bootstrap Glyphicons作为快捷方式图标 glyphicon glyphicon-cloud
我正在开发angularjs 1.6.5
我正在使用以下代码发送发票页面的数据。
$scope.products = [{qty: 0, description: ' ', sellingPrice: 0.0, unitPrice: 0.0, total: 0.0}];
$scope.fproducts = [];
$scope.generateInvoice = function () {
console.log("generateInvoice");
console.log($scope.fproducts);
console.log("sub total " + $scope.subTotal + " ft " + $scope.finalTotal + " pamt " + $scope.paidAmount + " baldue " + $scope.balancedue);
$scope.bd1 = {
'subTotal': $scope.subTotal,
'total': $scope.finalTotal,
'TotalPaid': $scope.paidAmount,
'invDateStr': $filter('date')($scope.invoiceDate, "MM/dd/yyyy"),
};
if ($scope.fproducts.length > 0) {
$scope.fproducts.forEach((total, index) => {
Object.entries(total).forEach(([key, value]) => {
console.log(index + " " + …Run Code Online (Sandbox Code Playgroud) java ×3
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