[Summary of problems] Solutions to common problems in development

问题： org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs

Reason: The xml file in the resources is not packaged into the project when the idea is packaged

solve:

<!-- Copy all the xml files under the java directory to the classpath -- > < resources
 >
   <resource>
     <directory> src/main/java </directory>
     <includes>
       <include> **/*.properties </include>
       <include> **/*.xml </include>
     </includes>
     <filtering> true </filtering>
   </resource>
 </resources>

Question : About the solution to "Error code: ERR_UNSAFE_PORT" in Google Chrome

Reason : Google Chrome has its own reserved port

Solution : Ports like 6666-6669 cannot be used, it is not a server problem, but a port setting problem

问题：java.lang.NoSuchMethodError: org.springframework.core.io.ResourceEditor.<init>

Reason : spring version conflict, there is more than one spring version in the project

Solution : remove the conflict

Problem : The page doesn't parse EL expressions and displays something like ${name}

Reason : web.xml header file version problem

Solution : The modified version is as follows

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         id="WebApp_ID" version="3.0">

Question : Is there garbled characters when the query condition is echoed?

Reason : You need to configure the encoding supported by the post request

Solution : Modify as follows

<filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>*.do</url-pattern>
  </filter-mapping>

Question : After using dubbo, spring 2.5.6 sec03 causes jar package conflict?

Reason : need to exclude the spring dependency of dubbo

Solution : Modify as follows

<exclusions> 
        <exclusion> 
            <artifactId>spring</artifactId> 
            <groupId>org.springframework</groupId> 
        </exclusion> 
    </exclusions>

问题：配置fastDFS的时候出现读取不到配置文件的现象？

原因：我用的idea，而配置文件.conf

解决：需要把conf的配置文件编译到classess目录下

读取classes下的配置文件

ClassPathResource resource = new ClassPathResource(path);
ClientGlobal.init(resource.getClassLoader().getResource(path).getPath());

	<resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                    <include>**/*.conf</include>
                </includes>
                <filtering>true</filtering>
            </resource>

问题：maven聚合工程的时候加入的sevlet等jar包不能够被子类继承？

原因：类型是provider的不能够被继承

解决：每一个需要的地方单独引入

[Summary of problems] Solutions to common problems in development

Guess you like