Spring注入
实体类:
package com.zxy.pojo; public class Address { private String address; public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } @Override public String toString() { return "Address{" + "address='" + address + '\'' + '}'; } }
package com.zxy.pojo; import java.util.*; public class Student { private String name; private Address address; private String[] books; private List<String> hobbys; private Map<String,String> card; private Set<String> games; private String wife; private Properties info; public String getName() { return name; } public void setName(String name) { this.name = name; } public Address getAddress() { return address; } public void setAddress(Address address) { this.address = address; } public String[] getBooks() { return books; } public void setBooks(String[] books) { this.books = books; } public List<String> getHobbys() { return hobbys; } public void setHobbys(List<String> hobbys) { this.hobbys = hobbys; } public Map<String, String> getCard() { return card; } public void setCard(Map<String, String> card) { this.card = card; } public Set<String> getGames() { return games; } public void setGames(Set<String> games) { this.games = games; } public String getWife() { return wife; } public void setWife(String wife) { this.wife = wife; } public Properties getInfo() { return info; } public void setInfo(Properties info) { this.info = info; } @Override public String toString() { return "Student{" + "name='" + name + '\'' + ", address=" + address.toString() + ", books=" + Arrays.toString(books) + ", hobbys=" + hobbys + ", card=" + card + ", games=" + games + ", wife='" + wife + '\'' + ", info=" + info + '}'; } }
package com.zxy.pojo; public class User { private String name; private int age; public User() { } public User(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String toString() { return "User{" + "name='" + name + '\'' + ", age=" + age + '}'; } }
ApplictionContext.xml(这里用beans.xml简化了)
1 <?xml version="1.0" encoding="UTF8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:schemaLocation=" 5 http://www.springframework.org/schema/beans 6 http://www.springframework.org/schema/beans/spring-beans-3.2.xsd"> 7 8 <bean id="address" class="com.zxy.pojo.Address"/> 9 10 <bean id="student" class="com.zxy.pojo.Student"> 11 <!-- 普通值注入 value --> 12 <property name="name" value="钟悉洋"/> 13 <!-- Bean注入 --> 14 <property name="address" ref="address"/> 15 <!-- 数组注入,ref --> 16 <property name="books"> 17 <array> 18 <value>红楼梦</value> 19 <value>西游记</value> 20 <value>三国演义</value> 21 <value>水浒传</value> 22 </array> 23 </property> 24 <!-- List注入 --> 25 <property name="hobbys"> 26 <list> 27 <value>听歌</value> 28 <value>敲代码</value> 29 <value>看电影</value> 30 </list> 31 </property> 32 <!-- Map注入 --> 33 <property name="card"> 34 <map> 35 <entry key="身份证" value="123123123123123"/> 36 <entry key="银行卡" value="97897897897"/> 37 </map> 38 </property> 39 <!--Set注入 --> 40 <property name="games"> 41 <set> 42 <value>LOL</value> 43 <value>COC</value> 44 <value>BOB</value> 45 </set> 46 </property> 47 <!-- null注入 --> 48 <property name="wife"> 49 <null/> 50 </property> 51 <!-- Properties注入 --> 52 <property name="info"> 53 <props> 54 <prop key="driver">mysql.jdbc</prop> 55 <prop key="url">.....</prop> 56 <prop key="username">root</prop> 57 <prop key="password">123456789</prop> 58 </props> 59 </property> 60 61 </bean> 62 </beans>
1 <?xml version="1.0" encoding="UTF8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xmlns:p="http://www.springframework.org/schema/p" 5 xmlns:c="http://www.springframework.org/schema/c" 6 xsi:schemaLocation=" 7 http://www.springframework.org/schema/beans 8 http://www.springframework.org/schema/beans/spring-beans-3.2.xsd"> 9 10 11 <!-- p命名 直接赋值 需要导入约束: xmlns:p="http://www.springframework.org/schema/p" --> 12 <bean id="user" class="com.zxy.pojo.User" p:name="钟悉洋" p:age="20"/> 13 14 <!-- c命名 有参构造器 construct-args 需要导入约束: xmlns:c="http://www.springframework.org/schema/c" --> 15 <bean id="user2" class="com.zxy.pojo.User" c:age="18" c:name="啧啧啧"/> 16 </beans>
Test
import com.zxy.pojo.Student; import com.zxy.pojo.User; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class MyTest { public static void main(String[] args) { ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml"); Student student = context.getBean("student",Student.class); System.out.println(student.toString()); } @Test public void test01(){ ApplicationContext context = new ClassPathXmlApplicationContext("userbeans.xml"); User user = context.getBean("user", User.class); System.out.println(user); User user2 = context.getBean("user2", User.class); System.out.println(user2); } }