Java：org.apache.commons.collections4.MapUtils获取Map数据

依赖

<dependency>
	<groupId>org.apache.commons</groupId> <artifactId>commons-collections4</artifactId> <version>4.4</version>
</dependency>

  
 

  
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示例

package com.demo.map;

import org.apache.commons.collections4.MapUtils;

import java.util.HashMap;
import java.util.Map;

public class MapUtilDemo { public static void main(String[] args) { Map<String, Object> map = new HashMap<>(); map.put("age", 12); // Integer age = (Integer) map.getOrDefault("age", 20); Integer age = MapUtils.getInteger(map, "age", 20); System.out.println("age: " + age); // age: 20 }
}
  
 

  
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如果是字符串类型

Map<String, Object> map = new HashMap<>();
map.put("age", "12");

// Integer age = (Integer) map.getOrDefault("age", 20);
// java.lang.String cannot be cast to java.lang.Integer

Integer age = MapUtils.getInteger(map, "age", 20);
System.out.println("age: " + age);
// age: 12

  
 

  
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文章来源: pengshiyu.blog.csdn.net，作者：彭世瑜，版权归原作者所有，如需转载，请联系作者。

原文链接：pengshiyu.blog.csdn.net/article/details/113802528