2022-09-07 10:15

你这貌似不是jfinal的问题吧？jdk8版本换新一点再试试？
https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8056984

2022-08-05 16:33

自己针对错误搜索引擎找一下就知道了

getContentLengthLong()

      
long getContentLengthLong() 
Since:
Servlet 3.1
      
    

按照方法的最低 servlet 要求和下面这个版本比较表格，选择 tomcat 版本就行了。

tomcat 版本比较

Servlet Spec	JSP Spec	EL Spec	WebSocket Spec	Authentication (JASPIC) Spec	Apache Tomcat Version	Latest Released Version	Supported Java Versions
6.0	3.1	5.0	2.1	3.0	10.1.x	10.1.0-M17 (beta)	11 and later
5.0	3.0	4.0	2.0	2.0	10.0.x	10.0.23	8 and later
4.0	2.3	3.0	1.1	1.1	9.0.x	9.0.65	8 and later
3.1	2.3	3.0	1.1	1.1	8.5.x	8.5.81	7 and later
3.1	2.3	3.0	1.1	N/A	8.0.x (superseded)	8.0.53 (superseded)	7 and later
3.0	2.2	2.2	1.1	N/A	7.0.x (archived)	7.0.109 (archived)	6 and later (7 and later for WebSocket)
2.5	2.1	2.1	N/A	N/A	6.0.x (archived)	6.0.53 (archived)	5 and later
2.4	2.0	N/A	N/A	N/A	5.5.x (archived)	5.5.36 (archived)	1.4 and later
2.3	1.2	N/A	N/A	N/A	4.1.x (archived)	4.1.40 (archived)	1.3 and later
2.2	1.1	N/A	N/A	N/A	3.3.x (archived)	3.3.2 (archived)	1.1 and later

2022-08-05 16:20

不用这么麻烦，jfinal-undertow 升级到 3.1 就好了。
里面的 undertow 版本已经升级到 2.2.18.Final，不会再有你这个错误信息的内容了。

2022-05-13 22:41

参考
https://bugs.openjdk.java.net/browse/JDK-8285445
https://issues.redhat.com/browse/XNIO-404
https://issues.redhat.com/browse/UNDERTOW-2073
把 undertow的依赖 xnio-api 和 xnio-nio 的版本升级到 3.8.7.Final 就行了。
            <dependency>
                <groupId>org.jboss.xnio</groupId>
                <artifactId>xnio-api</artifactId>
                <version> 3.8.7.Final</version>
                <exclusions>
                    <exclusion>
                        <groupId>org.jboss.threads</groupId>
                        <artifactId>jboss-threads</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>org.jboss.xnio</groupId>
                <artifactId>xnio-nio</artifactId>
                <version> 3.8.7.Final</version>
                <exclusions>
                    <exclusion>
                        <groupId>org.wildfly.common</groupId>
                        <artifactId>wildfly-common</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>