添加依赖

<!-- https://mvnrepository.com/artifact/net.sf.json-lib/json-lib -->
		<dependency>
			<groupId>net.sf.json-lib</groupId>
			<artifactId>json-lib</artifactId>
			<version>2.4</version>
			
		</dependency>

后，提示：Missing artifact net.sf.json-lib:json-lib:jar:2.4

解决方法：

<dependency>
			<groupId>net.sf.json-lib</groupId>
			<artifactId>json-lib</artifactId>
			<version>2.4</version>
			<classifier>jdk15</classifier>
		</dependency>