对List集合属性进行模糊查找

模糊查询String类型的List

List<String> list = new ArrayList<>();
list.add("test");
list.add("testA");
list.add("fall");
List<String> result = list.stream().filter(item->item.contains("te")).collect(Collectors.toList());
System.out.println(result.toString());

对List对象集合进行模糊查找

1. 使用下面的工具类

// 通过姓名模糊查找
list = FilterUtil.listFilter(
		// 判断name是否为空，空则不执行
        StringUtils.isNotEmpty(name),
	    // 姓名
        name,
     	// 待筛选数据集合
        list,
        User::getName);

2. 工具类

import java.util.*;
import java.util.function.Function;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @description:
 * @author: evildoer
 * @datetime: 2021/3/2 11:31
 */
public class FilterUtil{
    /**
     * @description: 模糊查找
     * @param condition 状态
     * @param target 筛选目标
     * @param list 数据集合
     * @param function 函数
     * @return: java.util.List
     * @author: evildoer
     * @datetime: 2021/3/2 11:32
     */
    public static <T> List<T> listFilter(boolean condition, String target, List<T> list, Function<T, ?> function) {
        List<T> result = null;
        if (condition) {
            result = listFilter(target, list, function);
        }
        // 不满足条件直接返回原数据集合
        return Optional.ofNullable(result).orElse(list);
    }


    public static <T> List<T> listFilter(String target, List<T> list, Function<T, ?> function) {
        List<T> result = new LinkedList<>();
        //该处决定大小写是否敏感
        Pattern pattern = Pattern.compile(target, Pattern.CASE_INSENSITIVE);
        for (T t : list) {
            Matcher matcher = pattern.matcher(function.apply(t).toString());
            if (matcher.find()) {
                result.add(t);
            }
        }
        return result;
    }
}

3. 测试

import lombok.AllArgsConstructor;
import lombok.Data;
import org.apache.commons.lang.StringUtils;

import java.util.ArrayList;
import java.util.List;

@Data
@AllArgsConstructor
class User{
    private String name;
    private Integer age;
}

public class Test {
    
    public static void main(String[] args) {

        // 通过用户姓名模糊查找
        String name = "张";
        List<User> list = new ArrayList<>();
        list.add(new User("张三", 18));
        list.add(new User("张叁", 18));
        list.add(new User("张山", 18));
        list.add(new User("李四", 19));
        list.add(new User("王五", 20));
        list = FilterUtil.listFilter(
                // 判断name是否为空，空则不执行
                StringUtils.isNotEmpty(name),
                name,
                list,
                User::getName);
        System.out.println(list.toString());
    }
}