我只是想通了。
首先，您必须更新server.xml并将readonly = false添加到：
<Resource auth="Container" readonly="false" description="User database thatcan be updated and saved"factory="org.apache.catalina.users.MemoryUserDatabaseFactory"name="UserDatabase" pathname="conf/tomcat-users.xml"type="org.apache.catalina.UserDatabase"/>
然后在一个jsp文件中：
<%!public static boolean changePasswd(String user, String passwd, MBeanServer mbeanServer, JspWriter out) throws Throwable{ try {String userFDN = "Users:type=User,username=""+user+"",database=UserDatabase"; ObjectName userObjName = new ObjectName(userFDN);MBeanInfo info = mbeanServer.getMBeanInfo(userObjName);Attribute attr=new Attribute("password",passwd);mbeanServer.setAttribute(userObjName, attr);ObjectName databaseObjName=new ObjectName("Users:type=UserDatabase,database=UserDatabase");Object result= mbeanServer.invoke(databaseObjName,"save",new Object[0],new String[0]); out.println("<b>Changed password and, Saved: "+result+"</b>");return true; } catch (Throwable t) {out.print("<font color='red'>WHY: </font>" + t);} return false; }%> <%MBeanServer mbeanServer = (MBeanServer) list.get(0); //ObjectName obname = new ObjectName( "Catalina:type=Resource,resourcetype=Global,class=org.apache.catalina.UserDatabase,name="UserDatabase"" ); ArrayList list = MBeanServerFactory.findMBeanServer(null); MBeanServer mbeanServer = (MBeanServer) list.get(0); changePasswd("user","passwd",mbeanServer,out);/ N
