#SO

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: Too many connections

最简单的办法是因为你的my.ini中设定的并发连接数太少或者系统繁忙导致连接数被占满解决方式:打开MySQL安装目录打开MY.INI找到max_connections默认是100.--实例WINDOWS解决mysql Errno.:1040错误XXXXinfo:CannotconnecttoMySQLserv...

fastjson是什么?

fastjson是一种Java语言的JSON处理工具,它是阿里巴巴公司开源的一个高性能、功能强大、易用性良好的JSON库。fastjson具有快速、简单、安全、便捷、高效等特点,被广泛应用于各种Java应用程序中。以下是fastjson的应用步骤:引入fastjson:可以使用maven或gradle等包管理工具引入f...
开发笔记 开发笔记·2024-03-19

升级Redisson版本兼容问题

升级版本:从3.10.6升级到3.18.0报错:java.io.IOException:Unsupportedprotocolversion252java.io.IOException:Unsupportedprotocolversion252atorg.jboss.marshalling.river.RiverUnm...

json_encode处理中文乱码问题的解决方法

用json_encode来处理中文的时候,中文都会被编码,变成不可读的,类似”u***”的格式,如果想汉字不进行转码,这里提供三种方法办法一:把汉字先urlencode然后再使用json_encode,json_encode之后再次使用urldecode来解码,这样编码出来的json数组中的汉字...

C#读取Excel报错:未在本地计算机上注册Microsoft.ACE.OLEDB.12.0提供程序

解决访问Excel数据源时出现未在本地计算机上注册Microsoft.ACE.OLEDB.12.0提供程序1、确保安装了Microsoft.ACE.OLEDB.12.0驱动http://download.microsoft.com/download/7/0/3/703ffbcb-dc0c-4e19-b0da-14639...

vue合并两个json对象

js合并json对象可以使用jquery中的$.extend将2的值合并到1,同key时默认2将会覆盖1的值//Mergeobject2intoobject1$.extend(object1,object2);但此种方法并不适用vue可使用concat()进行数组对象合并,但依旧不能对对象进行合并vararr3=arr...

java json序列换类

importcom.google.gson.Gson;2importcom.google.gson.GsonBuilder;34publicclassPerson{5privateStringname;6privateintage;78publicPerson(Stringname,intage){9this.name...
开发笔记 开发笔记·2023-08-02

ORA-53213: cannot access DICOM data with invalid source type

文档解释ORA-53213:cannotaccessDICOMdatawithinvalidsourcetypeCause:AninvalidsourcetypewasstoredinthesourceattributeoftheORDDicomobject.Action:SeetheOracleMultimediad...

ORA-31048: Unsaved resources cannot be updated

文档解释ORA-31048:UnsavedresourcescannotbeupdatedCause:Anattemptwasmadetoupdatearesourcethatwasneversavedtodisk.Action:Performaresourceinsertioninstead.ORA-31048:Un...

ORA-19615: some files not found in backup set

文档解释ORA-19615:somefilesnotfoundinbackupsetCause:Somefilesthatwerespecifiedforrestorationwerenotfoundinthebackupsetdirectory.Message19613or19614isissuedforeachfi...

ORA-29374: resource plan string in top-plan string has no plan directives

文档解释ORA-29374:resourceplanstringintop-planstringhasnoplandirectivesCause:Aplanwascreatedinthependingareathatisanorphanorstand-alone.Action:Createplandirectivesi...

ORA-29511: could not resolve Java class

文档解释ORA-29511:couldnotresolveJavaclassCause:ACREATEANDRESOLVENOFORCEJAVACLASScommandspecifieddefinitiondatathatcouldnotberesolved,orresolutionfailedforsomerefer...

ORA-29533: attempt to overwrite class or resource string while defining or compiling string.string

文档解释ORA-29533:attempttooverwriteclassorresourcestringwhiledefiningorcompilingstring.stringCause:AclassorresourcedefinedbyaSQLJsourceconflictedwithanexistingobje...

ORA-32004: obsolete or deprecated parameter(s) specified for string instance

文档解释ORA-32004:obsoleteordeprecatedparameter(s)specifiedforstringinstanceCause:ObsoleteordeprecatedparametersforthisinstancetypewerespecifiedintheSPFILEorthePFIL...
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