Java Stream使用多个过滤器(filter)或复杂条件方法用法及简单写法代码

示例类代码：

public class TestObject {
  private int property1;
  private int property2;
  private int property3;
  public TestObject(int property1, int property2, int property3) {
      this.property1 = property1;
      this.property2 = property2;
      this.property3 = property3;
  }
  public int getProperty(int key) {
      switch(key) {
          case 1: return property1;
          case 2: return property2;
          default: return property3;
      }
  }
}

1､使用filter和allMatch实现

List<TestObject> newList = list.stream()
        .filter(x ->
                filterMap.entrySet().stream()
                        .allMatch(y ->
                                x.getProperty(y.getKey()) == y.getValue()
                        )
        )
        .collect(Collectors.toList());

2､使用for实现多个过滤条件

Stream<TestObject> stream = list.stream();
for (Predicate<TestObject> predicate: allPredicates) {
  stream = stream.filter(predicate);
}
list = stream.collect(Collectors.toList());

3､使用foreach和filter实现

filterMap.forEach((key, value) -> list.stream()
        .filter(testObject -> testObject.getProperty(key) == value)
        .collect(Collectors.toList())
);