Spring-IOC容器-Bean管理-基于XML方式超详解

public class Book {

     private String bName;

     private String bAuthor;

     //创建属性

     public void setbName(String bName) {

         this .bName = bName;

     }

     //创建属性对应的 set 方法

     public void setbAuthor(String bAuthor) {

         this .bAuthor = bAuthor;

     }

}

<!--使用set方法注入属性-->

<bean id= "book" class = "com.atguigu.spring5.testDemo.Book" >

     <!--使用property完成属性注入

             name：类里面属性名称

             value：向属性注入的值

         -->

     <property name= "bAuthor" value= "发如雪" ></property>

     <property name= "bName" value= "周杰伦" ></property>

</bean>

public class Order {

     private String oName;

     private String address;

     public Order(String oName, String address) {

         this .oName = oName;

         this .address = address;

     }

}

<!--有参数构造注入属性-->

< bean id = "order" class = "com.atguigu.spring5.testDemo.Order" >

     < constructor-arg name = "address" value = "东风破" />

     < constructor-arg name = "oName" value = "周杰伦" />

</ bean >

< bean id = "book" class = "com.atguigu.spring5.Book" >

     <!--（1）null值-->

     < property name = "address" >

         < null /> <!--属性里边添加一个null标签-->

     </ property >

     <!--（2）特殊符号赋值-->

      <!--属性值包含特殊符号

        a 把<>进行转义 &lt; &gt;

        b 把带特殊符号内容写到CDATA

       -->

         < property name = "address" >

             < value > <![CDATA[<<南京>>]]> </ value >

         </ property >

</ bean >

public class UserService { //service类

     //创建UserDao类型属性，生成set方法

     private UserDao userDao;

     public void setUserDao(UserDao userDao) {

         this .userDao = userDao;

     }

     public void add() {

         System.out.println( "service add..............." );

         userDao.update(); //调用dao方法

     }

}

public class UserDaoImpl implements UserDao { //dao类

     @Override

     public void update() {

         System.out.println( "dao update..........." );

     }

}

<!-- 1 service和dao对象创建-->

<bean id= "userService" class = "com.atguigu.spring5.service.UserService" >

     <!--注入userDao对象

         name属性：类里面属性名称

         ref属性：创建userDao对象bean标签id值

     -->

     <property name= "userDao" ref= "userDaoImpl" ></property>

</bean>

<bean id= "userDaoImpl" class = "com.atguigu.spring5.dao.UserDaoImpl" ></bean>

//部门类

public class Dept {

     private String dname;

     public void setDname(String dname) {

         this .dname = dname;

     }

}

//员工类

public class Emp {

     private String ename;

     private String gender;

     //员工属于某一个部门，使用对象形式表示

     private Dept dept;

     public void setDept(Dept dept) {

         this .dept = dept;

     }

     public void setEname(String ename) {

         this .ename = ename;

     }

     public void setGender(String gender) {

         this .gender = gender;

     }

}

<!--内部bean-->

<bean id= "emp" class = "com.atguigu.spring5.bean.Emp" >

     <!--设置两个普通属性-->

     <property name= "ename" value= "周杰伦" ></property>

     <property name= "gender" value= "男" ></property>

     <!--设置对象类型属性-->

     <property name= "dept" >

         <bean id= "dept" class = "com.atguigu.spring5.bean.Dept" ><!--内部bean赋值-->

             <property name= "dname" value= "宣传部门" ></property>

         </bean>

     </property>

</bean>

<!--方式一：级联赋值-->

<bean id= "emp" class = "com.atguigu.spring5.bean.Emp" >

     <!--设置两个普通属性-->

     <property name= "ename" value= "Andy" ></property>

     <property name= "gender" value= "女" ></property>

     <!--级联赋值-->

     <property name= "dept" ref= "dept" ></property>

</bean>

<bean id= "dept" class = "com.atguigu.spring5.bean.Dept" >

     <property name= "dname" value= "公关部门" ></property>

</bean>

//方式二：生成dept的get方法（get方法必须有！！）

public Dept getDept() {

     return dept;

}

<!--级联赋值-->

<bean id= "emp" class = "com.atguigu.spring5.bean.Emp" >

     <!--设置两个普通属性-->

     <property name= "ename" value= "jams" ></property>

     <property name= "gender" value= "男" ></property>

     <!--级联赋值-->

     <property name= "dept" ref= "dept" ></property>

     <property name= "dept.dname" value= "技术部门" ></property>

</bean>

<bean id= "dept" class = "com.atguigu.spring5.bean.Dept" >

</bean>

//（1）创建类，定义数组、list、map、set 类型属性，生成对应 set 方法

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;

     }

<!--（ 2 ）在 spring 配置文件进行配置-->

     <bean id= "stu" class = "com.atguigu.spring5.collectiontype.Stu" >

         <!--数组类型属性注入-->

         <property name= "courses" >

             <array>

                 <value>java课程</value>

                 <value>数据库课程</value>

             </array>

         </property>

         <!--list类型属性注入-->

         <property name= "list" >

             <list>

                 <value>张三</value>

                 <value>小三</value>

             </list>

         </property>

         <!--map类型属性注入-->

         <property name= "maps" >

             <map>

                 <entry key= "JAVA" value= "java" ></entry>

                 <entry key= "PHP" value= "php" ></entry>

             </map>

         </property>

         <!--set类型属性注入-->

         <property name= "sets" >

             <set>

                 <value>MySQL</value>

                 <value>Redis</value>

             </set>

         </property>

</bean>

//学生所学多门课程

private List<Course> courseList; //创建集合

public void setCourseList(List<Course> courseList) {

     this .courseList = courseList;

}

<!--创建多个course对象-->

<bean id= "course1" class = "com.atguigu.spring5.collectiontype.Course" >

     <property name= "cname" value= "Spring5框架" ></property>

</bean>

<bean id= "course2" class = "com.atguigu.spring5.collectiontype.Course" >

     <property name= "cname" value= "MyBatis框架" ></property>

</bean>

<!--注入list集合类型，值是对象-->

<property name= "courseList" >

     <list>

         <ref bean= "course1" ></ref>

         <ref bean= "course2" ></ref>

     </list>

</property>

<!--第一步：在 spring 配置文件中引入名称空间 util-->

<? xml version = "1.0" encoding = "UTF-8" ?>

< beans xmlns = "http://www.springframework.org/schema/beans"

        xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"

        xmlns:util = "http://www.springframework.org/schema/util" <!--添加util名称空间-->

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">  <!--添加util名称空间-->

<!--第二步：使用 util 标签完成 list 集合注入提取-->

<!--把集合注入部分提取出来-->

<!--1 提取list集合类型属性注入-->

< util:list id = "bookList" >

     < value >易筋经</ value >

     < value >九阴真经</ value >

     < value >九阳神功</ value >

</ util:list >

<!--2 提取list集合类型属性注入使用-->

< bean id = "book" class = "com.atguigu.spring5.collectiontype.Book" scope = "prototype" >

     < property name = "list" ref = "bookList" ></ property >

</ bean >

public class MyBean implements FactoryBean<Course> {

     //定义返回bean

     @Override

     public Course getObject() throws Exception {

         Course course = new Course();

         course.setCname( "abc" );

         return course;

     }

}

<bean id= "myBean" class = "com.atguigu.spring5.factorybean.MyBean" >

</bean>

@Test

public void test3() {

  ApplicationContext context =

  new ClassPathXmlApplicationContext( "bean3.xml" );

  Course course = context.getBean( "myBean" , Course. class ); //返回值类型可以不是定义的bean类型！

  System.out.println(course);

}

<bean id= "book" class = "com.atguigu.spring5.collectiontype.Book" scope= "prototype" ><!--设置为多实例-->

         <property name= "list" ref= "bookList" ></property>

</bean>

public class Orders {

     //无参数构造

     public Orders() {

         System.out.println( "第一步---执行无参数构造创建bean实例" );

     }

     private String oname;

     public void setOname(String oname) {

         this .oname = oname;

         System.out.println( "第二步---调用set方法设置属性值" );

     }

     //创建执行的初始化的方法

     public void initMethod() {

         System.out.println( "第三步---执行初始化的方法" );

     }

     //创建执行的销毁的方法

     public void destroyMethod() {

         System.out.println( "第五步---执行销毁的方法" );

     }

}

<bean id= "orders" class = "com.atguigu.spring5.bean.Orders" init-method= "initMethod" destroy-method= "destroyMethod" >

     <property name= "oName" value= "周杰伦" >

     </property>

</bean>

@Test

public void test1(){

     ApplicationContext context= new ClassPathXmlApplicationContext( "bean1.xml" );

     Orders orders = context.getBean( "orders" , Orders. class );

     System.out.println( "第四步---获取创建bean实例对象" );

     System.out.println(orders);

     ((ClassPathXmlApplicationContext)context).close();

}

public class MyBeanPost implements BeanPostProcessor { //创建后置处理器实现类

     @Override

     public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {

         System.out.println( "在初始化之前执行的方法" );

         return bean;

     }

     @Override

     public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {

         System.out.println( "在初始化之后执行的方法" );

         return bean;

     }

}

<!--配置文件的bean参数配置-->

<bean id= "orders" class = "com.atguigu.spring5.bean.Orders" init-method= "initMethod" destroy-method= "destroyMethod" >    <!--配置初始化方法和销毁方法-->

     <property name= "oname" value= "手机" ></property><!--这里就是通过set方式（注入属性）赋值-->

</bean>

<!--配置后置处理器-->

<bean id= "myBeanPost" class = "com.atguigu.spring5.bean.MyBeanPost" ></bean>

<!--实现自动装配

    bean 标签属性 autowire，配置自动装配

    autowire 属性常用两个值：

    byName 根据属性名称注入 ，注入值 bean 的 id 值和类属性名称一样

    byType 根据属性类型注入

   -->

<bean id= "emp" class = "com.atguigu.spring5.autowire.Emp" autowire= "byName" >

</bean>

<bean id= "dept" class = "com.atguigu.spring5.autowire.Dept" ></bean>

<bean id= "emp" class = "com.atguigu.spring5.autowire.Emp" autowire= "byType" >

</bean>

<bean id= "dept" class = "com.atguigu.spring5.autowire.Dept" ></bean>

<!--直接配置连接池-->

<bean id= "dataSource" class = "com.alibaba.druid.pool.DruidDataSource" >

     <property name= "driverClassName" value= "com.mysql.jdbc.Driver" ></property>

     <property name= "url" value= "jdbc:mysql://localhost:3306/userDb" ></property>

     <property name= "username" value= "root" ></property>

     <property name= "password" value= "root" ></property>

</bean>

prop.driverClass=com.mysql.jdbc.Driver

prop.url=jdbc:mysql://localhost:3306/userDb

prop.userName=root

prop.password=root

< beans xmlns = "http://www.springframework.org/schema/beans"

        xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"

        xmlns:context = "http://www.springframework.org/schema/context"

        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

                            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!--引入context名称空间-->

         <!--引入外部属性文件-->

     < context:property-placeholder location = "classpath:jdbc.properties" />

     <!--配置连接池-->

     < bean id = "dataSource" class = "com.alibaba.druid.pool.DruidDataSource" >

         < property name = "driverClassName" value = "${prop.driverClass}" ></ property >

         < property name = "url" value = "${prop.url}" ></ property >

         < property name = "username" value = "${prop.userName}" ></ property >

         < property name = "password" value = "${prop.password}" ></ property >

     </ bean >

</ beans >