search
HomeDatabaseMysql TutorialMySQL 乱码解决的两大方案介绍

MySQL 乱码解决的两大方案介绍

Jun 07, 2016 pm 04:12 PM
jspmysqlGarbled charactersintroduceplancorrectsolve

对正确解决JSP中的乱码问题(解决tomcat下中文乱码问题 )中我们也对MySQL乱码问题进行了详细说明,相信你看完之后会对JSP里的一些乱码问题有所解决,不过还是有些人的MySQL乱码问题没有得到解决。 包括我自己,所以又找了一些资料,希望这次能完全解决MySQL

对正确解决JSP中的乱码问题(解决tomcat下中文乱码问题 )中我们也对MySQL乱码问题进行了详细说明,相信你看完之后会对JSP里的一些乱码问题有所解决,不过还是有些人的MySQL乱码问题没有得到解决。

包括我自己,所以又找了一些资料,希望这次能完全解决MySQL数据库的乱码问题。
 

MySQL 乱码解决方案的第一种方法,很精辟的总结:

经常更换虚拟主机,而各个服务商的MySQL版本不同,当导入数据后,总会出现乱码等无法正常显示的问题,查了好多资料,总结出自己的一点技巧:

WINDOWS 下导入应该这样

使用MySQL的命令

在DOS命令下进入MySQL的bin目录下,输入MySQL -uroot -p密码 数据库名称

MySQL -uroot -p密码 test2以前的国外主机用的MySQL是4.x系列的,感觉还比较好,都无论GBK和UTF-8都没有乱码,没想到新的主机的MySQL是5.0版本的,导入数据后,用Php读出来全是问号,乱码一片,记得我以前也曾经有过一次切换出现乱码的经验,原因肯定是MySQL版本之间的差异问题。

只好查资料,发现了一个解决方法,就是在MySQL_connect后面加一句SET NAMES UTF8,即可使得UTF8的数据库消除乱码,对于GBK的数据库则使用SET NAMES GBK,代码如下:

<ol class="dp-xml">
<li class="alt">
<span><span>$</span><span style="color: white; background-color: navy"><span class="attribute"><span id="1274078464389S" style="display: none"> </span></span></span></span><span ><span class="attribute">mysql</span></span><span><span class="attribute"><span id="1274078465293E" style="display: none"> </span>_mylink</span><span> = </span><span class="attribute-value">mysql_connect</span><span>($mysql_host, $mysql_user, $mysql_pass);   </span></span>
</li>
<li><span>mysql_query("SET NAMES 'GBK'"); </span></li>
</ol>

数据库字符集为utf-8

连接语句用这个

<ol class="dp-xml">
<li class="alt"><span><span>mysql_query("SET NAMES 'UTF8'");   </span></span></li>
<li><span>mysql_query("SET CHARACTER SET UTF8");   </span></li>
<li class="alt">
<span>mysql_query("SET </span><span class="attribute">CHARACTER_SET_RESULTS</span><span>=</span><span class="attribute-value">UTF8</span><span>'"); </span>
</li>
</ol>

还有个方法就是,如果你自己的机器的话,可以更改MYSQL字符集,一般在MYSQ4和MYSQL5这两个版本中有效

mysql 乱码解决方案的第二个方法:很不错的解说,可以试一下

mysql乱码处理总结:

(1)java中处理中文字符正常,在cmd client中显示乱码是字符集的问题.

(2)字段长度设置够长,但插入中文字符时提示com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column错误是字符集的问题.

(3)乱码问题归根到底是字符集的问题,那就从字符集设置方面考虑,不外乎下面几个方面:server,client,database,connection,results.

解决办法:

(1)修改 my.ini(MySQL Server Instance Configuration 文件)

<ol class="dp-xml">
<li class="alt"><span><span># CLIENT SECTION  </span></span></li>
<li><span>[client]  </span></li>
<li class="alt">
<span class="attribute">port</span><span>=</span><span class="attribute-value">3306</span><span> </span>
</li>
<li><span>[mysql]  </span></li>
<li class="alt">
<span class="attribute">default-character-set</span><span>=</span><span class="attribute-value">gbk</span><span> </span>
</li>
<li><span># SERVER SECTION  </span></li>
<li class="alt"><span>[mysqld]  </span></li>
<li>
<span class="attribute">default-character-set</span><span>=</span><span class="attribute-value">gbk</span><span>   </span>
</li>
</ol>

(2)修改data目录中相应数据库目录下的db.opt配置文件

<ol class="dp-xml">
<li class="alt"><span><span class="attribute">default-character-set</span><span>=</span><span class="attribute-value">gbk</span><span> </span></span></li>
<li>
<span class="attribute">default-collation</span><span>=</span><span class="attribute-value">gbk_chinese_ci</span><span> </span>
</li>
</ol>

(3)数据库连接串中指定字符集

URL=jdbc:mysql://yourIP/college?user=root&password=yourPassword&useUnicode=true&characterEncoding=gbk

注:在mysql4.1.0版 要加useUnicode=true&characterEncoding=gbk 如果是5.0版以上的,加不加都是没有关系的!

(4)在创建数据库时指定字符集

<ol class="dp-xml"><li class="alt"><span><span>create database yourDB CHARACTER SET gbk; </span></span></li></ol>

(5)在dos命令上要设置

<ol class="dp-xml"><li class="alt"><span><span>set names gbk </span></span></li></ol>

好了,经过检查上面四个方面的设置,应该 OK 了!不会出现诸如com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column等问题.

以上的相关内容就是对mysql 乱码解决方案的介绍,望你能有所收获。


Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Explain the InnoDB Buffer Pool and its importance for performance.Explain the InnoDB Buffer Pool and its importance for performance.Apr 19, 2025 am 12:24 AM

InnoDBBufferPool reduces disk I/O by caching data and indexing pages, improving database performance. Its working principle includes: 1. Data reading: Read data from BufferPool; 2. Data writing: After modifying the data, write to BufferPool and refresh it to disk regularly; 3. Cache management: Use the LRU algorithm to manage cache pages; 4. Reading mechanism: Load adjacent data pages in advance. By sizing the BufferPool and using multiple instances, database performance can be optimized.

MySQL vs. Other Programming Languages: A ComparisonMySQL vs. Other Programming Languages: A ComparisonApr 19, 2025 am 12:22 AM

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages ​​such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages ​​have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

Learning MySQL: A Step-by-Step Guide for New UsersLearning MySQL: A Step-by-Step Guide for New UsersApr 19, 2025 am 12:19 AM

MySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.

MySQL: Essential Skills for Beginners to MasterMySQL: Essential Skills for Beginners to MasterApr 18, 2025 am 12:24 AM

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL: Structured Data and Relational DatabasesMySQL: Structured Data and Relational DatabasesApr 18, 2025 am 12:22 AM

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL: Key Features and Capabilities ExplainedMySQL: Key Features and Capabilities ExplainedApr 18, 2025 am 12:17 AM

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

The Purpose of SQL: Interacting with MySQL DatabasesThe Purpose of SQL: Interacting with MySQL DatabasesApr 18, 2025 am 12:12 AM

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

MySQL for Beginners: Getting Started with Database ManagementMySQL for Beginners: Getting Started with Database ManagementApr 18, 2025 am 12:10 AM

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Tools

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Atom editor mac version download

Atom editor mac version download

The most popular open source editor