1、说明
constructor-arg：通过构造函数注入。
property：通过setter对应的方法注入。
2、constructor-arg的使用示例
(1)、Model代码：
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public class Student {
private Integer id;
private String name;
private List<String> dream;
private Map<String, Integer> score;
private boolean graduation;
public Student() {
}
public Student(Integer id, String name, List<String> dream,
Map<String, Integer> score, boolean graduation) {
this.id = id;
this.name = name;
this.dream = dream;
this.score = score;
this.graduation = graduation;
}
@Override
public String toString() {
return "Student [id=" + id + ", name=" + name + ", dream=" + dream
+ ", score=" + score + ", graduation=" + graduation + "]";
}
} |
(2)、xml配置：
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<bean id="student" class="com.rc.sp.Student">
<constructor-arg name="id" value="1"/>
<constructor-arg name="name" value="student"/>
<constructor-arg name="dream">
<list>
<value>soldier</value>
<value>scientist</value>
<value>pilot</value>
</list>
</constructor-arg>
<constructor-arg name="score">
<map>
<entry key="math" value="90"/>
<entry key="english" value="85"/>
</map>
</constructor-arg>
<constructor-arg name="graduation" value="false"/>
</bean>
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说明：<constructor-arg name="id" value="1"/>也可以改成<constructor-arg index="0" value="1"/>方式；boolean的值既可以用0/1填充，也可以用true/false填充。
3、property的使用示例
(1)、Model代码：
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public class Teacher {
private Integer id;
private String name;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return "Teacher [id=" + id + ", name=" + name + "]";
}
} |
(2)、xml配置：
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<bean id="teacher" class="com.rc.sp.Teacher">
<property name="id" value="1"></property>
<property name="name" value="teacher"></property>
</bean>
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4、Test
(1)、测试代码：
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public class Run {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext(
"applicationContext.xml");
Student student = (Student) context.getBean("student");
System.out.println(student);
Teacher teacher = (Teacher) context.getBean("teacher");
System.out.println(teacher);
}
} |
(2)、输出结果：
Student [id=1, name=student, dream=[soldier, scientist, pilot],
score={math=90, english=85}, graduation=false]
Teacher [id=1, name=teacher]