解決Page directive: illegal to have multiple occurrences of contentType with different values錯誤

一個jsp頁面包含另一個jsp頁面忽然出現這種錯誤

Page directive: illegal to have multiple occurrences of contentType with different values (old: text/html; charset=utf-8, new: text/html; charset=UTF-8)
    at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:41)
    at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:275)
    at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:107)
    at org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.java:135)
    at org.apache.jasper.compiler.Node$PageDirective.accept(Node.java:571)
    at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
    at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428)
    at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2434)
    at org.apache.jasper.compiler.Node$Root.accept(Node.java:464)
    at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
    at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428)
    at org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.java:101)
    at org.apache.jasper.compiler.Node$IncludeDirective.accept(Node.java:635)
    at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
    at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428)
    at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2434)
    at org.apache.jasper.compiler.Node$Root.accept(Node.java:464)

 

首先看下此兩個頁面中page指令

<%@ page contentType="text/html; charset=UTF-8" language="java" %>

charset=UTF-8 字符集是否不同。大小寫不同也會報錯。所以保持統一。兩個頁面的字符集設置成一模一樣。要麼同時大寫要麼同時小寫