本博文摘自:http://www.blogjava.net/nkjava/archive/2009/03/29/262705.html 出现这个问题,可能是添加了struts2-codebehind包,去除这个包就可以了 No mapping found for dependency [type=java.lang.String, name='actionPackages'] java.lang.RuntimeException: java.lang.RuntimeException: com.…

spring boot 前台GET请求,传递时间类型的字符串,后台无法解析,报错:Failed to convert from type [java.lang.String] to type [java.util.Date] 而POST请求,传入时间类型字符串,后台是可以解析成Date类型的. 出现这个错误,在需要接受Date类型的字符串参数的controller层中,加入: @InitBinder public void initBinder(WebDataBinder binder) { S…

出现org.hibernate.TypeMismatchException: Provided id of the wrong type for class cn.itcast.entity.User. Expected: class java.lang.String, got class java.lang.Integer at org.hibernate.event.internal.DefaultLoadEventListener.checkIdClass(DefaultLoadEvent…

java.lang.IllegalStateException: Failed to load ApplicationContext at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:132) at org.springframework.test.context.suppo…

java.lang.IllegalStateException: Failed to load ApplicationContext at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125) at org.springframework.test.context.suppo…

今天做springbook项目前端输入日期传到数据库保存报了一下错误 Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback. Sun Feb 09 16:31:32 CST 2020 There was an unexpected error (type=Bad Request, status=400). Validation…

对于setCharacterEncoding(java.lang.String),这个方法是javax.servlet.ServletRequest和javax.servlet.ServletResponse都有的.ServletRequest用它来设置对来自客户端请求的字节流的解码方式,ServletResponse用它来设置发送给客户端的字节流的编码方式.例如:ServletResponse.setCharacterEncoding("UTF-8"); 对于 setContentT…

String类定义实现了java.io.Serializable, Comparable<String>, CharSequence 三个接口:并且为final修饰. public final class String defined String由char[]数组实现 /** The value is used for character storage. */ private final char value[]; /** Cache the hash code for the strin…

查询时发送给服务器的日期的字符串格式:yyyy-MM-dd HH:mm:ss 服务器接收到日期的字符串之后,向 MySQL 数据库发起查询时,因为没有指定日期时间格式,导致字符串数据不能正确地转换为日期而产生的错误: 1 2019-12-05 17:43:55.215 WARN 1460 --- [nio-8080-exec-6] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.validation…

java中String的常用方法1.length() 字符串的长度 例:char chars[]={'a','b'.'c'}; String s=new String(chars); int len=s.length(); 2.charAt() 截取一个字符 例:char ch; ch="abc".charAt(1); 返回'b' 3. getChars() 截取多个字符 void getChars(int sourceStart,int sourceEnd,char target[]…