1. 为什么不支持中文

1.1 tomcat

tomcat在conf/logging.properties文件中定义tomcat输出为utf-8编码,在conf/server.xml中未指明请求编码方式，而使用默认编码ISO-8859-1

conf/loggin.properties

1catalina.org.apache.juli.AsyncFileHandler.level = FINE
1catalina.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
1catalina.org.apache.juli.AsyncFileHandler.prefix = catalina.
1catalina.org.apache.juli.AsyncFileHandler.maxDays = 90
1catalina.org.apache.juli.AsyncFileHandler.encoding = UTF-8

2localhost.org.apache.juli.AsyncFileHandler.level = FINE
2localhost.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
2localhost.org.apache.juli.AsyncFileHandler.prefix = localhost.
2localhost.org.apache.juli.AsyncFileHandler.maxDays = 90
2localhost.org.apache.juli.AsyncFileHandler.encoding = UTF-8

3manager.org.apache.juli.AsyncFileHandler.level = FINE
3manager.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
3manager.org.apache.juli.AsyncFileHandler.prefix = manager.
3manager.org.apache.juli.AsyncFileHandler.maxDays = 90
3manager.org.apache.juli.AsyncFileHandler.encoding = UTF-8

4host-manager.org.apache.juli.AsyncFileHandler.level = FINE
4host-manager.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
4host-manager.org.apache.juli.AsyncFileHandler.prefix = host-manager.
4host-manager.org.apache.juli.AsyncFileHandler.maxDays = 90
4host-manager.org.apache.juli.AsyncFileHandler.encoding = UTF-8

java.util.logging.ConsoleHandler.level = FINE
java.util.logging.ConsoleHandler.formatter = org.apache.juli.OneLineFormatter
java.util.logging.ConsoleHandler.encoding = UTF-8

conf/server.xml

    <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443"/>

1.2 CMD or PowerShell

windowsCMD和PowerShell的默认编码为

可通过CHCP 查看和修改当前命令行的编码格式(仅作用于当前窗口),另windows系统默认为GBK

1.3 IDEA

IDEA的字符编码随文件、系统、项目、JDK的不同而不同（多处配置编码但一般为utf8），除tomcat控制台外默认为UTF-8（不考虑远古版本）。

IDEA内置的tomcat控制台经过二次编码处理，所以tomcat控制台和IDEA的tomcat控制台编码不能等价

2. 解决方法

2.1 判断哪里乱码(tomcat还是IDEA)[仅限控制台]

单独启动tomcat查看tomcat打开的控制台是否是乱码，如果乱码代表tomcat控制台从开始就已经乱码,设置编码由tomcat到IDEA，IDEA一般情况默认编码已经是utf-8了，除了控制台和终端使用gbk

2.1 最少修改

修改tomcat的conf/loggin.properties中的所有UTF-8为GBK 使控制台编码正常

1catalina.org.apache.juli.AsyncFileHandler.level = FINE
1catalina.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
1catalina.org.apache.juli.AsyncFileHandler.prefix = catalina.
1catalina.org.apache.juli.AsyncFileHandler.maxDays = 90
1catalina.org.apache.juli.AsyncFileHandler.encoding = gbk

2localhost.org.apache.juli.AsyncFileHandler.level = FINE
2localhost.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
2localhost.org.apache.juli.AsyncFileHandler.prefix = localhost.
2localhost.org.apache.juli.AsyncFileHandler.maxDays = 90
2localhost.org.apache.juli.AsyncFileHandler.encoding = gbk

3manager.org.apache.juli.AsyncFileHandler.level = FINE
3manager.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
3manager.org.apache.juli.AsyncFileHandler.prefix = manager.
3manager.org.apache.juli.AsyncFileHandler.maxDays = 90
3manager.org.apache.juli.AsyncFileHandler.encoding = gbk

4host-manager.org.apache.juli.AsyncFileHandler.level = FINE
4host-manager.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
4host-manager.org.apache.juli.AsyncFileHandler.prefix = host-manager.
4host-manager.org.apache.juli.AsyncFileHandler.maxDays = 90
4host-manager.org.apache.juli.AsyncFileHandler.encoding = gbk

java.util.logging.ConsoleHandler.level = FINE
java.util.logging.ConsoleHandler.formatter = org.apache.juli.OneLineFormatter
java.util.logging.ConsoleHandler.encoding = gbk

修改tomcat的conf/server.xml，使请求信息为UTF-8(与servlet处理编码方式一致,可根据实际情况更改)

    <Connector port="8086" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" URLEncoding="utf-8" />

IDEA的各个地方设置UTF-8:

编译器
文件默认编码及当前文件编码

右下角
1. tomcat VM
2. IDEA本身编码,idea目录下两个vm文件追加-Dfile.encoding=UTF-8
3. 当前项目编码设置,.idea/encoding.xml中设置"UTF-8"
4. 什么你还没解决，你电脑是个奇行种，还是设置统一编码吧。

2.2 统一编码

各个地方编码不统一出错哪一环都不知道,就要祭出大杀器了，所有设置为UTF-8，会引发一些对windows编码强制设置gbk的软件的编码问题(一般是非主流软件)例如某小工具:

食用方法:

上2.1中一样的位置gbk改为utf-8,如果使utf-8就不变
解决CMD编码(永久)
1. 修改注册表(win+R输入regedit)HKEY_CURRENT_USER\Console\%SystemRoot%_system32_cmd.exe,新建一个 DWORD（32位值）,命名为CodePage,值设为65001 已有CodePage的话,修改它,改为十进制,65001;
  修改注册表HKEY_CURRENT_USER\Console\Tomcat,新建一个 DWORD（32位值）,命名为CodePage，值设为65001 已有CodePage的话，修改它，改为十进制，65001。注:如需设置powershell 同目录下含有powershell的项执行相同操作
2. 或新建cmd.reg
```
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Console\%SystemRoot%_system32_cmd.exe]
"CodePage"=dword:0000fde9
"FontFamily"=dword:00000036
"FontWeight"=dword:00000190
"FaceName"="Consolas"
"ScreenBufferSize"=dword:232900d2
"WindowSize"=dword:002b00d2
```
  然后执行
设置windows编码
1. 打开小娜搜索控制面板,选择时钟与区域，点击区域，点击管理，带点击更改系统区域设置，勾选Bate版：使用Unicode UTF-8提供全球语言支持，然后立即重启(必须)
IDEA设置控制台二次编码格式