Tomcat 中的默认用户名和密码是什么？

Look in your conf/tomcat-users.xml. If there is nothing there, you'd have to configure it.

Check the file in <TOMCAT_HOME>/conf named tomcat-users.xml.
If you don't find something there edit to look something like:

<?xml version='1.0' encoding='utf-8'?>
<tomcat-users>
<role rolename="admin"/>
<user username="admin" password="password" roles="standard,manager,admin"/>
</tomcat-users>

In Tomcat 7, under TOMCAT_HOME/conf/tomcat_users.xml, see the <user /> tag to see password.

Example:

  <role rolename="tomcat"/>
<role rolename="role1"/>
<user username="tomcat" password="tomcat" roles="tomcat"/>
<user username="both" password="tomcat" roles="tomcat,role1"/>
<user username="role1" password="tomcat" roles="role1"/>

Well, you need to look at the answers above, but you'll find that the manager app requires you to have a user with the role 'manager', I believe, so you'll probably want to add the following to your tomcat-users.xml file:

<role rolename="manager"/>
<user username="youruser" password="yourpass" roles="manager"/>

This might seem simplistic, but it's just a simple implementation that you can extend / replace with other authentication mechanisms.

My answer is tested on Windows 7 with installation of NetBeans IDE 6.9.1 which has bundled Tomcat version 6.0.26. The instruction may work with other tomcat versions according to my opinion.

If you are starting the Apache Tomcat server from the Servers panel in NetBeans IDE then you shall know that the Catalina base and config files used by NetBeans IDE to start the Tomcat server are kept at a different location.

Steps to know the catalina base directory for your installation:

1. Right click on the Apache Tomcat node in Servers panel and choose properties option in the context menu. This will open a dialog box named Servers.
2. Check the directory name of the field Catalina Base, this is that directory where the current conf/tomcat-users.xml is located and which you want to open and read.
   (In my case it is C:\Users\Tushar Joshi\.netbeans\6.9\apache-tomcat-6.0.26_base )
3. Open this directory in My Computer and go to the conf directory where you will find the actual tomcat-users.xml file used by NetBeans IDE. NetBeans IDE comes configured with one default password with username="ide" and some random password, you may change this username and password if you want or use it for your login also
4. This dialog box also have username and password field which are populated with these default username and password and NetBeans IDE also offers you to open the manager application by right clicking on the manager node under the Apache Tomcat node in Servers panel
5. The only problem with the NetBeans IDE is it tries to open the URL http://localhost:8084/manager/ which shall be http://localhost:8084/manager/html now

in file /conf/tomcat-users.xml check or add:

......
<role rolename="manager"/>
<user username="ide" password="ide" roles="manager,tomcat,manager-script"/>
</tomcat-users>

Open tomcat-users.xml which should be in C:\Tomcat 7.0\conf

Add following lines in above file :

<tomcat-users>
<role rolename="manager-gui"/>
<user username="admin" password="" roles="manager-gui"/>


<role rolename="admin-gui"/>
<user username="tomcat" password="s3cret" roles="admin-gui"/>
</tomcat-users>

Note :

1. admin-gui -> Username & Password - Do not Change.
2. manager-gui -> you can change user name & password for this only. [Here password is not given]

If people still have problems after adding/modifying the tomcat-users.xml file and adding the relevant user/role for the version of Tomcat that they're using then please be sure that you've removed the comment tags that are surrounding this block. They will look like this in the XML file:
<!--
-->
They will be above and below the user/role section.

If your apache tomcat asking for password,then just follow these steps: go to the home directory of apache then go to webapps folder open the META-INF inside that you will find an xml file named context.xml--open it in edit mode

and REMOVE THE COMMENT FROM the VALVE tag.

After that you dont need any user name and password.

Platform NetBeans 7.3, Apache Tomcat 7.0.34 re: Tomcat Manager

I spent 3 days tracking this down because I thought I had a bad install.

On Windows and Linux, NetBeans uses a separate file location for CATALINA_BASE:

http://wiki.netbeans.org/FaqInstallationDefaultTomcatPassword

So you can modify the tomcat_user.xml under CATALINA_HOME: until your face turns blue, to no effect.

It appears that the IDE only requires, manager-script,admin roles under CATALINA_BASE:.

When I tried to add a user to the manager-gui role (to the correct tomcat_user.xml file), required for access to the Tomcat Manager, Tomcat stopped presenting the login dialog and went directly to the 401 access denied splash page.

It appears that the NetBeans package uses a locked-down version of TomCat.

I hope this saves everyone some time.

Only this helped me:

To use the web administration gui you have to add the gui role :

<role rolename="admin"/>
<role rolename="admin-gui"/>
<role rolename="manager"/>
<role rolename="manager-gui"/>


<user username="name" password="pwd" roles="admin,admin-gui,manager,manager-gui"/>

Go to "%TOMCAT_FOLDER%/conf/tomcat-users.xml" and configure the following :

<tomcat-users>
<role rolename="manager-gui"/>
<role rolename="manager-script"/>
<role rolename="manager-jmx"/>
<role rolename="manager-status"/>
<role rolename="admin"/>
<user username="admin" password="admin" roles="admin,manager-gui,manager-script"/>
</tomcat-users>

Hence, the username is "admin" and password is "admin"

In Tomcat 7 you have to add this to tomcat-users.xml (On windows 7 it is located by default installation here: c:\Program Files\Apache Software Foundation\Tomcat 7.0\conf\ )

<?xml version="1.0" encoding="UTF-8"?>
<tomcat-users>
<role rolename="manager-gui"/>
<role rolename="manager-script"/>
<role rolename="manager-jmx"/>
<role rolename="manager-status"/>
<role rolename="admin-gui"/>
<role rolename="admin-script"/>
<user username="admin" password="admin" roles="manager-gui,manager-script,manager-jmx,manager-status,admin-gui,admin-script"/>
</tomcat-users>

NOTE that there shouldn't be ANY spaces between roles for admin, as this list should be comma separated.

So, instead of this (as suggested in some answers:

<user username="admin" password="admin" roles="manager-gui, manager-script, manager-jmx, manager-status, admin-gui, admin-script"/>

it MUST be like this:

  <user username="admin" password="admin" roles="manager-gui,manager-script,manager-jmx,manager-status,admin-gui,admin-script"/>

For Window 7, Netbeans 8.0.2 , Apache Tomcat 8.0.15
C:\Users\JONATHAN\AppData\Roaming\NetBeans\8.0.2\apache-tomcat-8.0.15.0_base\conf\tomcat-users.xml
The Tomcat Manager Username and password is like below pic..

In conf/tomcat-users.xml you can see what's your actual user configuration, in my case is usually user="admin" and pass="1234"

First navigate to below location and open it in a text editor

<TOMCAT_HOME>/conf/tomcat-users.xml

For tomcat 7, Add the following xml code somewhere between <tomcat-users>

  <role rolename="manager-gui"/>
<user username="username" password="password" roles="manager-gui"/>

Now restart the tomcat server.

In Tomcat 7, 8, and 9 there is NO default user, so nobody can access a Manager app. You need to alter conf/tomcat-users.xml by adding new user with the role "manager-gui", like:

<role rolename="manager-gui"/>
<user username="admin" password="admin" roles="manager-gui"/>

Look up here: https://www.mkyong.com/tomcat/tomcat-default-administrator-password/

try tomcat tomcat as the default username and password (tomcat 7)

Check the file in <TOMCAT_HOME>/conf named tomcat-users.xml. If you don't find something there edit to look something like:

You can access in tomcat Manager-App and Host-Manager. add two role in one line

  <role rolename="manager-gui,admin-gui"/>
<user username="admin" password="admin" roles="standard,manager-gui,admin-gui"/>