1.Spring 1.1中创建对象的方式。通过无参数构造创建user.java公共类用户{私有字符串名称}；User () {system.out.println("用户无参数构造方法")；} public void set name(String name){ this . name = name；} public void show(){ system . out . println(" name = "+name)；} } beans.xml & lt？xml版本="1.0 "编码="UTF-8 "？& gt& ltbeans xmlns = " http://www . spring framework . org/schema/beans " xmlns:xsi = " http://www . w3 . org/2001/XML schema-instance " xsi:schema location = " http://www.springframework.org/schema/beans http://www . spring framework . org/schema/beans/spring-beans . xsd " & gt；& ltbean id = " user " class = " com . lkb . POJO . user " & gt；& ltproperty name = " name " value = " lkb "/& gt；& lt/bean & gt；& lt/beans & gt；test class @ testpublicviddest(){ application context = newclasspathmlaplicationcontext(" beans . XML ")；//执行getBean时，已经创建了用户，无参数构造了用户user =(user)context . get bean(" user ")；//调用对象的method . user . show()；}结果可以发现，在调用show方法之前，User对象已经被无参数构造初始化了！2.2.它是由参数化构造创建的。1.Usert。Java公共类usert {私有字符串名称；public UserT(String name){ this . name = name；} public void set name(String name){ this . name = name；} public void show(){ system . out . println(" name = "+name)；}}2.beans.xml可以用三种方式编写<？xml版本="1.0 "编码="UTF-8 "？& gt& ltbeans xmlns = " http://www . spring framework . org/schema/beans " xmlns:xsi = " http://www . w3 . org/2001/XML schema-instance " xsi:schema location = " http://www . spring framework . org/schema/beans http://www . spring framework . org/schema/beans/schema/beans/spring-beans . xsd " & gt；& lt！-第一个是根据指标参数下标设置的-->:& lt；bean id = " user t1 " class = " com . lkb . POJO . usert " & gt；& lt！- index是指构造方法，下标从0开始-->:& lt；constructor-arg index = " 0 " value = " lkb "/& gt；& lt/bean & gt；& lt！-第二个是根据参数名设置的->:& lt；bean id = " user T2 " class = " com . lkb . POJO . usert " & gt；& lt！- name是指参数名->；& ltconstructor-arg name = " name " value = " lkb "/& gt；& lt/bean & gt；& lt！-第三个是根据参数类型设置的(不推荐)->:& lt；bean id = " user T3 " class = " com . lkb . POJO . usert " & gt；& ltconstructor-arg type = " Java . lang . string " value = " lkb "/& gt；& lt/bean & gt；& lt/beans & gt；3.test @ test public void testt(){ application context = new classpathmlaplicationcontext(" beans . XML ")；UserT user =(UserT)context . getbean(" UserT ")；user . show()；}结论:加载配置文件时 所有被管理的对象都已经初始化了！2.弹簧配置2.1。别名< bean id = " user t1 " class = " com . lkb . POJO . usert " >& ltconstructor-arg index = " 0 " value = " lkb "/& gt；& lt/bean & gt；& lt！- alias为bean创建别名-->:& lt；别名= " user t1 " alias = " u1 "/& gt；2.2.Bean配置<！- id:它是bean的标识符，应该是唯一的。如果没有已配置的id，name是默认的标识符。如果有配置的id和名称，则名称是别名。您可以设置多个别名，用逗号、分号和空格分隔。如果既没有配置id也没有配置name，那么可以根据applicationcontext.getbean(。类)；-& gt；& ltbean id = " user T2 " class = " com . lkb . POJO . usert " name = " U2，ut2 " >& lt！- name是指参数名->；& ltconstructor-arg name = " name " value = " lkb "/& gt；& lt/bean & gt；Id:是Bean的标识符，应该是唯一的。如果没有已配置的id，name是默认的标识符。如果有配置的id和名称，则名称是别名。Name相当于alias，可以设置多个别名，用逗号、分号、空格分隔。如果既没有配置id也没有配置name，那么在读取bean对象时，可以根据applicationcontext.getbean(。类)；2.3.importimport相当于合并配置文件。当我们有多个Spring配置文件时，可以通过导入来合并配置文件，合并后Bean可以互相调用。 & lt导入资源= " { path }/beans . XML "/& gt；最后，谢谢你看到这个。看完有什么不明白的，可以在评论区问我。如果你觉得文章对你有帮助，请给我点个赞。你每天都会参考java相关的技术文章或者行业信息。欢迎大家关注并转发文章！