IOC 操作Bean管理（xml 注入集合属性）+（bean 作用域）

public class Stu {
 //1 数组类型属性
 private String[] courses;
 //2 list 集合类型属性
 private List<String> list;
 //3 map 集合类型属性
 private Map<String,String> maps;
 //4 set 集合类型属性
 private Set<String> sets;
 public void setSets(Set<String> sets) {
 this.sets = sets;
 }
 public void setCourses(String[] courses) {
 this.courses = courses;
 }
 public void setList(List<String> list) {
 this.list = list;
 }
 public void setMaps(Map<String, String> maps) {
 this.maps = maps;
 }
}