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图像没有在JSP中显示？(Image not showing in JSP?)

 我有简单的JSP网页，但它不显示图像  
 这是我的JSP页面，它将从Web内容下的图片文件夹中获取图像  
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Insert title here</title>
  </head>
  <body>

     <img width = "80" src="${pageContext.request.contextPath}/pics/">
  </body>
</html>
 
 但是页面看起来像这样  
  

I do have simple JSP web page, but it's not displaying an image 
This is my JSP page where it will fetch the image from pics folder under web content  
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Insert title here</title>
  </head>
  <body>

     <img width = "80" src="${pageContext.request.contextPath}/pics/">
  </body>
</html>
 
But the page looks like this 

原文：https://stackoverflow.com/questions/50770081

更新时间：2022-07-03 06:07

最满意答案

 你可以做几件事：  
 
  拥有一个返回两种不同类型的函数是不理想的，因此您可以使用类方法处理转换。  
  如果print（）函数也支持转换，这将有所帮助  
 
 考虑到这一点，我只是在类中移动了转换，并添加了一个str方法。  
from fractions import gcd

class Fraction:
    def __init__(self, numerator, denominator):
        self.numerator = numerator
        self.denominator = denominator
        self.simplify()

    def __str__(self):
        if self.denominator == 1:
            return str(self.numerator)
        return '{}/{}'.format(self.numerator,self.denominator)

    def simplify(self):
        div = gcd(self.numerator, self.denominator)
        self.numerator //= div
        self.denominator //= div
    def convert(fraction):
        if fraction.denominator == 1:
            return fraction.numerator  # int
        return fraction # Fraction

if __name__ == '__main__':
    f = Fraction(6, 2)
    c = Fraction.convert(f)
    print(f)
    print(c)
    f2 = Fraction(3, 4)
    print(f2)
 
 看看它是否可以帮到你。 

There are a couple of things you can do: 
 
 It is not optimal to have a function which returns two different types, so you could handle the conversion with a class method. 
 It would help if the conversion was supported in the print() func as well 
 
With that in mind, I just moved convert inside the class, and added a str method as well. 
from fractions import gcd

class Fraction:
    def __init__(self, numerator, denominator):
        self.numerator = numerator
        self.denominator = denominator
        self.simplify()

    def __str__(self):
        if self.denominator == 1:
            return str(self.numerator)
        return '{}/{}'.format(self.numerator,self.denominator)

    def simplify(self):
        div = gcd(self.numerator, self.denominator)
        self.numerator //= div
        self.denominator //= div
    def convert(fraction):
        if fraction.denominator == 1:
            return fraction.numerator  # int
        return fraction # Fraction

if __name__ == '__main__':
    f = Fraction(6, 2)
    c = Fraction.convert(f)
    print(f)
    print(c)
    f2 = Fraction(3, 4)
    print(f2)
 
See if it can help you.

图像没有在JSP中显示？(Image not showing in JSP?)

最满意答案

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