昨日一同事喊我去他的机子上救火,告诉我折腾了半天,还是存在中文乱码问题。15分钟后找到了问题的原因。 现象: url = jdbc:mysql://127.0.0.1/test?useUnicode=true amp; characterEncoding=UTF-8,这段代码出现在配置文件(database.properties)中。 分析:
昨日一同事喊我去他的机子上救火,告诉我折腾了半天,还是存在中文乱码问题。15分钟后找到了问题的原因。
现象:url = jdbc:mysql://127.0.0.1/test?useUnicode=true&characterEncoding=UTF-8,这段代码出现在配置文件(database.properties)中。
分析:上述是原先写的,问题就在& xml/html转译符上,在xml/html里面需要写成转义符,但是在纯文本的模式下写成那样就不对了,将导致配置参数无效,原来问题出在一个标点符号上。
去掉amp; 写成 url = jdbc:mysql://127.0.0.1/test?useUnicode=true&characterEncoding=UTF-8,即可。
收工以前,做了五分钟的科普向同事们总结了一下,一般导致中文乱码问题7点因素:
1.数据库使用的字符集
2.数据库表使用的字符集
3.html、JSP 页面上的编码
4.使用的JDBC url连接是否正确
5.web服务器端 应用服务器 和 操作系统 设置的字符集是否和你需要的匹配
6.你的IDE开发环境(Eclipse)工程使用的字符集是否匹配
7.检查你的工程的web.xml文件是否在使用关于字符编码的过滤器
以上几点原因都是导致产生中午乱码的因素,如果你的项目中出现了中文乱码不妨可以按照上述思路试试。
–end–
原文地址:Java web开发中文乱码问题, 感谢原作者分享。

MySQLviewshavelimitations:1)Theydon'tsupportallSQLoperations,restrictingdatamanipulationthroughviewswithjoinsorsubqueries.2)Theycanimpactperformance,especiallywithcomplexqueriesorlargedatasets.3)Viewsdon'tstoredata,potentiallyleadingtooutdatedinforma

ProperusermanagementinMySQLiscrucialforenhancingsecurityandensuringefficientdatabaseoperation.1)UseCREATEUSERtoaddusers,specifyingconnectionsourcewith@'localhost'or@'%'.2)GrantspecificprivilegeswithGRANT,usingleastprivilegeprincipletominimizerisks.3)

MySQLdoesn'timposeahardlimitontriggers,butpracticalfactorsdeterminetheireffectiveuse:1)Serverconfigurationimpactstriggermanagement;2)Complextriggersincreasesystemload;3)Largertablesslowtriggerperformance;4)Highconcurrencycancausetriggercontention;5)M

Yes,it'ssafetostoreBLOBdatainMySQL,butconsiderthesefactors:1)StorageSpace:BLOBscanconsumesignificantspace,potentiallyincreasingcostsandslowingperformance.2)Performance:LargerrowsizesduetoBLOBsmayslowdownqueries.3)BackupandRecovery:Theseprocessescanbe

Adding MySQL users through the PHP web interface can use MySQLi extensions. The steps are as follows: 1. Connect to the MySQL database and use the MySQLi extension. 2. Create a user, use the CREATEUSER statement, and use the PASSWORD() function to encrypt the password. 3. Prevent SQL injection and use the mysqli_real_escape_string() function to process user input. 4. Assign permissions to new users and use the GRANT statement.

MySQL'sBLOBissuitableforstoringbinarydatawithinarelationaldatabase,whileNoSQLoptionslikeMongoDB,Redis,andCassandraofferflexible,scalablesolutionsforunstructureddata.BLOBissimplerbutcanslowdownperformancewithlargedata;NoSQLprovidesbetterscalabilityand

ToaddauserinMySQL,use:CREATEUSER'username'@'host'IDENTIFIEDBY'password';Here'showtodoitsecurely:1)Choosethehostcarefullytocontrolaccess.2)SetresourcelimitswithoptionslikeMAX_QUERIES_PER_HOUR.3)Usestrong,uniquepasswords.4)EnforceSSL/TLSconnectionswith

ToavoidcommonmistakeswithstringdatatypesinMySQL,understandstringtypenuances,choosetherighttype,andmanageencodingandcollationsettingseffectively.1)UseCHARforfixed-lengthstrings,VARCHARforvariable-length,andTEXT/BLOBforlargerdata.2)Setcorrectcharacters


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 Chinese version
Chinese version, very easy to use

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

Notepad++7.3.1
Easy-to-use and free code editor

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
