2.ioc注入
实体类：
public class IOCIntro { private String bName; private String bAuthor; public void setAddress(String address) { this.address = address; } private String address; public void setbAuthor(String bAuthor) { this.bAuthor = bAuthor; } public void setbName(String bName) { this.bName = bName; } public IOCIntro() { } public IOCIntro(String bName, String bAuthor) { this.bName = bName; this.bAuthor = bAuthor; } public void testHere(){ System.out.println(bName+"//"+bAuthor+"//"+address); } }
xml
<?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" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd"> <!--set方法注入属性--> <bean id="book" class="day502IOC.IOCIntro"><!--此方法其实是使用了无参构造创建对象--> <!--使用property完成属性的注入 name:名称 value：值 --> <property name="bName" value="set方式注入"></property> <!--向属性里设置空值（虽然不写也是空值）--> <property name="bAuthor"> <null/> </property> <!--向属性里设置特殊值<>--> <property name="address"> <value><![CDATA[<<南京>>]]]></value> </property> </bean> <!--有参构造方法注入属性--> <bean id="book2" class="day502IOC.IOCIntro"> <constructor-arg name="bAuthor" value="有参构造输入"></constructor-arg> <constructor-arg name="bName" value="有参构造输入"></constructor-arg> <!--还可以通过索引值来构造index="0" value="..."代表第一个参数--> </bean> <bean id="book3" class="day502IOC.IOCIntro" p:bAuthor="p方式注入"></bean> <!--null值的设置--> </beans>
测试类
@Test public void test01(){ //测试set方法注入属性xml 此方法必须要使用set函数 ApplicationContext context=new ClassPathXmlApplicationContext("502Bean2.xml"); IOCIntro book=context.getBean("book",IOCIntro.class); System.out.println(book); book.testHere(); } /** * 测试有参构造方法的注入 */ @Test public void test02() { //测试set方法注入属性xml 此方法必须要使用set函数 ApplicationContext context=new ClassPathXmlApplicationContext("502Bean2.xml"); IOCIntro book=context.getBean("book2",IOCIntro.class); System.out.println(book); book.testHere(); } //p方式注入 @Test public void test03() { ApplicationContext context=new ClassPathXmlApplicationContext("502Bean2.xml"); IOCIntro book=context.getBean("book3",IOCIntro.class); System.out.println(book); book.testHere(); }
外部bean方法的注入
接口和实现类
public interface UserDao { void update(); } public class UserDaoImpl implements UserDao { @Override public void update() { System.out.println("dao update"); } }
service：
public class UserService { //创建userdao类型的属性，生成set方法 private UserDao userDao; public void setUserDao(UserDao userDao) { this.userDao = userDao; } public void add(){ System.out.println("service的add"); userDao.update(); //普通方法 // UserDao userDao=new UserDaoImpl();//接口多态 // userDao.update(); } }
xml：
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <!--service对象的创建--> <bean id="userService" class="day502IOC.UserService"> <!--注入userDao对象--> <property name="userDao" ref="userDaoImpl"></property> </bean> <!--bean在外面所以是外部bean--> <bean id="userDaoImpl" class="day502IOC.UserDaoImpl"></bean> </beans>
内部bean和级联赋值
实体类
public class Department { int did; public void setDid(int did) { this.did = did; } @Override public String toString() { return "Department{" + "did=" + did + '}'; } }
public class Employee { private String ename; private Map<String,String> map; private Set<Department> departmentSet; public Set<Department> getDepartmentSet() { return departmentSet; } public void setDepartmentSet(Set<Department> departmentSet) { this.departmentSet = departmentSet; } public Map<String, String> getMap() { return map; } public void setMap(Map<String, String> map) { this.map = map; } public List<String> getList() { return list; } public void setList(List<String> list) { this.list = list; } public int[] getNumber() { return number; } public void setNumber(int[] number) { this.number = number; } private List<String> list; private int[] number; public Department getDep() { return dep; } private Department dep; public void setEname(String ename) { this.ename = ename; } public void setDep(Department dep) { this.dep = dep; } @Override public String toString() { return "Employee{" + "ename='" + ename + '\'' + ", dep=" + dep + '}'; } public void show(){ System.out.println(map); System.out.println(list); System.out.println(number); } public void showSet(){ departmentSet.forEach(System.out::println); } }
xml
<?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" 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"> <bean id="emp" class="day502IOC.Employee"> <property name="ename" value="charles"></property> <!--内部bean嵌套创建对象--> <property name="dep"> <bean id="dept" class="day502IOC.Department"> <property name="did" value="1"></property> </bean> </property> </bean> <!--级联赋值1（和外部bean相似）--> <bean id="emp2" class="day502IOC.Employee" scope="prototype"> <property name="ename" value="charles"></property> <!--内部bean嵌套创建对象--> <property name="dep" ref="dept2"></property> </bean> <bean id="dept2" class="day502IOC.Department"> <property name="did" value="2"></property> </bean> <!--级联赋值2（需要get方法）--> <bean id="emp3" class="day502IOC.Employee"> <property name="ename" value="charles"></property> <!--内部bean嵌套创建对象--> <property name="dep" ref="dept3"></property> <property name="dep.did" value="3"></property> </bean> <bean id="dept3" class="day502IOC.Department"> </bean> <!--特殊的类型属性注入--> <bean id="emp4" class="day502IOC.Employee"> <property name="number"> <!--使用array也可以--> <list> <value>1</value> <value>2</value> </list> </property> <property name="list"> <list> <value>ni</value> <value>hao</value> </list> </property> <property name="map"> <map> <entry key="Java" value="good"></entry> </map> </property> </bean> <!--值是对象的集合注入并且变成公共部分--> <bean id="emp5" class="day502IOC.Employee"> <property name="departmentSet" > <list> <ref bean="deptset1"></ref> <ref bean="deptset2"></ref> </list> </property> <!--外部注入--> <property name="list" ref="departmentList"></property> </bean> <!--创建多个dept对象--> <!--这样其他的bean也能用这个list--> <util:list id="departmentList"> <value>外部注入1</value> <value>外部注入2</value> </util:list> <bean id="deptset1" class="day502IOC.Department"> <property name="did" value="11"></property> </bean> <bean id="deptset2" class="day502IOC.Department"> <property name="did" value="22"></property> </bean> </beans>
测试类：
//测试内部bean @Test public void test05() { ApplicationContext context=new ClassPathXmlApplicationContext("502bean4.xml"); Employee emp = context.getBean("emp", Employee.class); System.out.println(emp); } //测试级联赋值 以及特殊属性的赋值 @Test public void test06() { ApplicationContext context=new ClassPathXmlApplicationContext("502bean4.xml"); Employee emp = context.getBean("emp2", Employee.class); System.out.println(emp); System.out.println("------------------"); Employee emp3 = context.getBean("emp3", Employee.class); System.out.println(emp3); System.out.println("------------------"); Employee employee=context.getBean("emp4",Employee.class); employee.show(); System.out.println("-------集合的元素是对象-----------"); Employee emp5 = context.getBean("emp5", Employee.class); emp5.showSet(); //外部注入 emp5.show(); }
