CriteriaBuilder：使用ON子句一对多连接

public static Specification spec() {
return (root, query, cb) -> {
final Join studs = root.join(“students”, JoinType.LEFT);
studs.on(cb.equal(studs.get(Student_.name), “John”));
final Join works = studs.join(“works”, JoinType.LEFT);
return cb.equal(works.get(ScientificWork_.name), “Black Holes”);
};

}

我用 join 代替 joinSet， 然后用put

**works**.get(ScientificWork_.name)

**nodes**.get(ScientificWork_.name)