URLDecoder().decode(filePath, "UTF-8");报错

pom.xml代码

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>s06</artifactId>
    <version>1.0-SNAPSHOT</version>

    <repositories>
        <repository>
            <id>aliyun</id>
            <name>aliyun</name>
            <url>https://maven.aliyun.com/repository/public</url>
        </repository>
    </repositories>

    <dependencies>
        <!-- Dom4j是Java的XML解析组件 -->
        <dependency>
            <groupId>org.dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>2.1.1</version>
        </dependency>
        <!-- Jaxen是Xpath表达式解释器 -->
        <dependency>
            <groupId>jaxen</groupId>
            <artifactId>jaxen</artifactId>
            <version>2.0.0</version>
        </dependency>
    </dependencies>

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

</project>

本类代码

package com.imooc.spring.ioc.context;

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;

import java.io.File;
import java.net.URL;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class ClassPathXmlApplicationContext implements ApplicationContext{
    private Map iocContainer = new HashMap();
    public ClassPathXmlApplicationContext(){
        try{
            String filePath = this.getClass().getResource("/applicationContext.xml").getPath();
            filePath = new URLDecoder().decode(filePath, "UTF-8");
            SAXReader reader=new SAXReader();
            Document document=reader.read(new File((filePath)));
            List<Node> beans = document.getRootElement().selectNodes("bean");
            for(Node node : beans){
                Element ele = (Element)node;
                String id = ele.attributeValue("id");
                String className = ele.attributeValue("class");
                Class c=Class.forName(className);
                Object obj=c.newInstance();
                iocContainer.put(id,obj);
            }
            System.out.println("IOC容器初始化完毕");
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    @Override
    public Object getBean(String beanId) {
        return iocContainer.get(beanId);
    }
}

图片

同学你好，从报错截图中看，是没有进行导包操作，同学可以点击import按钮导入尝试一下。

祝学习愉快~