How to solve the Chinese garbled characters in Tomcat logs?

The Chinese language of the Linux system is garbled, which is a problem that many friends often encounter when they first come into contact with Linux. Moreover, when we move the projects that have been deployed in Wndows to run on Linux, the Chinese output logs of Tomcat are all garbled. (Normal on Windows), it looks very frustrating, so how should we solve it?

System Chinese garbled code

## Tomcat output log Chinese garbled code

System environment

• CentOS 7.0 64-bit

##jdk-8u11-linux-x64.

• ##apache-tomcat-8.5. 16

• ## Solution steps:

1. Install the Chinese language pack

First check whether the Chinese language pack is installed on the system

locale -a (list the names of all available public locale environments)

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 machines in her in in in on in on in on in on in on in on the names in all available public locales What do several items mean?

　　　　{Language code}_{Country code}.{Character set}

zh is the code for Chinese, CN is the code for China, gb18030, gb2312, utf8 is the language character set

　　　　Then each item can be commonly understood as "You speak Chinese, you are in China, and the language character set is gb18030/gb2312/utf8"

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　ccosten in us\If the above items are not found, manually install the Chinese language Package

　　　　　　　　　

yum install kde-l10n-Chinese 　　　　　　　　　　　　　　　　　　　　　　　　 somehow 11M in about 11M

# Before modifying the configuration file, let’s take a look at the current system locale

　　

　("en_US.UTF-8" can be understood as "you speak English, you are in the United States, and the language character set is UTF-8" according to the above content)　　
　　　　 Each item The meanings are:

LANG: The language of the current system LC_CTYPE: Language symbols and their classification

LC_NUMERIC: Numbers LC_COLLATE: Comparison and sorting Habit

LC_TIME: Time display format

LC_MONETARY: Currency unit

LC_MESSAGES: The information is mainly prompt information, error information, status information, title, label, button and menu, etc.

LC_NAME：Name writing method

LC_ADDRESS：Address writing method

LC_TELEPHONE：Phone number writing method

LC_MEASUREMENT：Weights and measures expression

LC_PAPER: Default paper size

LC_IDENTIFICATION: Overview of the information contained in the locale itself

LC_ALL: The highest priority variable. If this variable is set, all LC_* and LANG variables will be forced to follow. Its value

We see that although the Chinese language pack is installed, the locale of the machine is not Chinese. First modify the i18n configuration file

vim /etc/sysconfig/i18n

Add the following two lines of code

LANG="zh_CN.UTF-8"

LC_ALL="zh_CN.UTF-8"

# source /etc/sysconfig/i18n

　　Modify the locale.cnf configuration file

　　 # vim /etc/locale.conf

　　 LANG="zh_CN.UTF-8"

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　##　　　　　　　　　　　　　　　　　　　　　　　　　　　　 shall should should should be 10-100ml

## 　　　　　　　　　　　　　　　　　　　　　　

　　　　　　　　　　

##　　　　　　　　　　

##　　　　　　　　　　　　　　　　　　　　　　

##　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

##　　　　　　　　

##　　　Properties->Terminal (the terminal connection tool I use is Xshell. For other connection tools, please change the encoding method on Baidu)

　　Change the encoding to UTF-8

Reconnect and check the current system locale

Locale

It is found that the system locale has been successfully changed to "zh_CN.UTF-8"

Try editing Chinese again

#　　SUCCESS! At this point, the problem of garbled Chinese characters in the system has been solved.

4. Solve the problem of garbled Chinese characters in the Tomcat output log

Now that the Chinese garbled characters in the system have been solved, will the Chinese garbled characters in the Tomcat output log also be solved?

Let’s take a look at the Tomcat output log now

Enter the Tomcat directory

# cd $CATALINA_HOME

# tail -f ./logs/catalina.out

#, Tomcat log Chinese is still garbled.

Analysis: Since Chinese garbled characters no longer appear in the system, it proves that the system language environment is normal, but Chinese garbled characters still appear in the Tomcat log, indicating that it is an internal problem of Tomcat. I checked some information online and found that it is the JVM. (Java Virtual Machine)

　　The character set used by the Java virtual machine is inconsistent with the character set used by the system. If you know the reason, the problem will be solved. You can modify the JVM startup parameters by configuring the JVM startup parameters. Character set purpose.

# ls -l ./bin/

Find daemon.sh and catalina.sh and add the following codes respectively:

JAVA_OPTS= "$JAVA_OPTS -Djavax.servlet.request.encoding=UTF-8 -Dfile.encoding=UTF-8 -Duser.language=zh_CN -Dsun.jnu.encoding=UTF-8"

# vim ./ bin/daemon.sh

# vim ./bin/catalina.sh

Save and exit, restart Tomcat

 # ./bin/shutdown.sh

 # ./bin/startup.sh

Now check the output log

 # tail -f ./ logs/catalina.out

Send a request to the server

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