網上各種解決辦法都是版本錯誤什麼的，換個版本的Maven依賴，掛了代理都下不動，手動導了包又報了個ClassNotFound，WEB-INF下的lib也有對應的jar包，後來發現貌似是犯二了，沒有匯入jstl-impl，又搜了一下，這哥們正確配置Jstl的Maven依賴給了正確的Maven依賴配置：

1. <dependency>
2.            <groupId>javax.servlet.jsp.jstl</groupId>
3.            <artifactId>jstl-api</artifactId>
4.            <
   version>1.2</version>
5.            <exclusions>
6.                <exclusion>
7.                    <groupId>javax.servlet</groupId>
8.                    <artifactId>servlet-api</artifactId>
9.                </exclusion>
10.                <exclusion>
11.                    <
    groupId>javax.servlet.jsp</groupId>
12.                    <artifactId>jsp-api</artifactId>
13.                </exclusion>
14.            </exclusions>
15.        </dependency>
16.        <dependency>
17.            <groupId>org.glassfish.web</groupId>
18.            <artifactId
    >jstl-impl</artifactId>
19.            <version>1.2</version>
20.            <exclusions>
21.                <exclusion>
22.                    <groupId>javax.servlet</groupId>
23.                    <artifactId>servlet-api</artifactId>
24.                </exclusion>
25.                <exclusion>
26.                    <groupId>javax.servlet.jsp</groupId>
27.                    <artifactId>jsp-api</artifactId>
28.                </exclusion>
29.                <exclusion>
30.                    <groupId>javax.servlet.jsp.jstl</groupId>
31.                    <artifactId>jstl-api</artifactId>
32.                </exclusion>
33.            </exclusions>
34.        </dependency>

其實現在看來原因是現有的專案中已經有了對jsp-api和javax.servlet-api的引用，再引入一個JSTL，JSTL也會引入自身一套的jsp-api和javax.servlet-api引用，所以需要在pom.xml中把jstl引用的jsp-api和javax.servlet-api給exclusion掉。

普通的javaee專案無非就需要3個jar包

1. <dependency>
2.     <groupId>javax.servlet</groupId>
3.     <artifactId>javax.servlet-api</artifactId>
4.     <version>3.0.1</version>
5.     <scope>provided</scope>
6. </dependency>
7. <dependency>
8.     <groupId>javax.servlet.jsp</groupId>
9.     <artifactId>jsp-api</artifactId>
10.     <version>2.1</version>
11.     <scope>provided</scope>
12. </dependency>
13. <dependency>
14.     <groupId>javax.servlet</groupId>
15.     <artifactId>jstl</artifactId>
16.     <version>1.2</version>
17. </dependency>