Spring 数据规范 - 如何按多个属性过滤对象

Question

我正在尝试通过多个属性实现用户搜索。比方说，我的人有名字和姓氏。我想输入 'Michael Doe' 并列出所有具有此姓名和姓氏的人。当我只输入 'Michael' 时，我想要所有 Michaels 等等。

我试图通过使用像这样的谓词来实现它：

private static Specification<UserEntity> containsTextInAttributes(List<String> text, List<String> attributes) {
    List<String> finalTextArray = text.stream().map(e -> "%"+e+"%").collect(Collectors.toList());
    return (root, query, builder) -> builder.or(root.getModel().getDeclaredSingularAttributes().stream()
            .filter(a -> attributes.contains(a.getName()))
            .map(a -> builder.or(finalTextArray.stream().map(e -> builder.like(root.get(a.getName()), e)).toArray(Predicate[]::new)))
            .toArray(Predicate[]::new)
    );
}

public static Specification<UserEntity> containsTextInAllAttributes(List<String> text) {
    return containsTextInAttributes(text, Arrays.asList("lastname", "firstname", "email", "phoneNumber"));
}

但是，当我搜索“Michael Doe”时，我找到了所有 Michaels 和所有姓氏 Doe。我该如何解决我的问题？

提前感谢您的帮助。

Answer 1

I. "Michael D", "firstName", "lastName" 或 "mdoe@gmail", "email"

public <T> Specification<T> dynamicLike(String likeValue, String... properties) {
    return (Root<T> root, CriteriaQuery<?> query, CriteriaBuilder cb) -> {

        Expression<String> concat = null;

        for (String property : properties) {
            if (concat == null) {
                concat = cb.concat("", root.get(property));
            } else {
                concat = cb.concat(concat, cb.concat(" ", root.get(property)));
            }
        }

        return cb.like(cb.lower(concat), "%" + likeValue.toLowerCase() + "%");
    };
}

II. "Mic Do @gmail", "firstName", "lastName", "email"

public <T> Specification<T> dynamicLike2(String value, String... properties) {
    return (Root<T> root, CriteriaQuery<?> query, CriteriaBuilder cb) -> {

        String[] values = value.split("\s");
        int minNumber = Integer.min(values.length, properties.length);

        Predicate[] likes = new Predicate[minNumber];

        for (int i = 0; i < minNumber; i++) {
            likes[i] = cb.like(cb.lower(root.get(properties[i])), "%" + values[i].toLowerCase() + "%");
        }

        return cb.and(likes);
    };
}

Spring 数据规范 - 如何按多个属性过滤对象

Spring Data Specifications - how can I filter objects by mulitple attributes

java

spring

predicates

spring-data-jpa

jpa-criteria