Spring 配置文件中 constructir -arg 和 property 的使用案例

http://blog.csdn.net/guoxilen/article/details/22752707

一、说明
    constructor-arg：通过构造函数注入。 
    property：通过setter对应的方法注入。

二、constructor-arg的使用示例

    1、Model代码：

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1. public class Student {  
2.     private Integer id;  
3.     private String name;  
4.     private List<String> dream;  
5.     private Map<String, Integer> score;  
6.     private boolean graduation;  
7.   
8.     public Student() {  
9.     }  
10.   
11.     public Student(Integer id, String name, List<String> dream,  
12.             Map<String, Integer> score, boolean graduation) {  
13.         this.id = id;  
14.         this.name = name;  
15.         this.dream = dream;  
16.         this.score = score;  
17.         this.graduation = graduation;  
18.     }  
19.   
20.     @Override  
21.     public String toString() {  
22.         return “Student [id=” + id + “, name=” + name + “, dream=” + dream  
23.                 + ”, score=” + score + “, graduation=” + graduation + “]”;  
24.     }  
25. }  

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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1. <bean id=”student”class=”com.rc.sp.Student”>  
2.     <constructor-argnameconstructor-argname=“id” value=“1”/>  
3.     <constructor-argnameconstructor-argname=“name” value=“student”/>  
4.     <constructor-argnameconstructor-argname=“dream”>  
5.         <list>  
6.             <value>soldier</value>  
7.             <value>scientist</value>  
8.             <value>pilot</value>  
9.         </list>  
10.     </constructor-arg>  
11.     <constructor-argnameconstructor-argname=“score”>  
12.         <map>  
13.             <entrykeyentrykey=“math” value=“90”/>  
14.             <entrykeyentrykey=“english” value=“85”/>  
15.         </map>  
16.     </constructor-arg>  
17.     <constructor-argnameconstructor-argname=“graduation” value=“false”/>  
18. </bean>  

<bean id="student"class="com.rc.sp.Student">    <constructor-argname="id" value="1"/>    <constructor-argname="name" value="student"/>    <constructor-argname="dream">        <list>            <value>soldier</value>            <value>scientist</value>            <value>pilot</value>        </list>    </constructor-arg>    <constructor-argname="score">        <map>            <entrykey="math" value="90"/>            <entrykey="english" value="85"/>        </map>    </constructor-arg>    <constructor-argname="graduation" value="false"/></bean>

    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。

三、property的使用示例
    1、Model代码：

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1. public class Teacher {  
2.     private Integer id;  
3.     private String name;  
4.   
5.     public Integer getId() {  
6.         return id;  
7.     }  
8.   
9.     public void setId(Integer id) {  
10.         this.id = id;  
11.     }  
12.   
13.     public String getName() {  
14.         return name;  
15.     }  
16.   
17.     public void setName(String name) {  
18.         this.name = name;  
19.     }  
20.   
21.     @Override  
22.     public String toString() {  
23.         return “Teacher [id=” + id + “, name=” + name + “]”;  
24.     }  
25. }  

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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1. <bean id=“teacher” class=“com.rc.sp.Teacher”>  
2.     <property name=“id” value=“1”></property>  
3.     <property name=“name” value=“teacher”></property>  
4. </bean>  

<bean id="teacher" class="com.rc.sp.Teacher">    <property name="id" value="1"></property>    <property name="name" value="teacher"></property></bean>

四、Test
    1、测试代码：

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1. public class Run {  
2.     public static void main(String[] args) {  
3.         ApplicationContext context = new ClassPathXmlApplicationContext(“applicationContext.xml”);  
4.         Student student = (Student) context.getBean(”student”);  
5.         System.out.println(student);  
6.         Teacher teacher = (Teacher) context.getBean(”teacher”);  
7.         System.out.println(teacher);  
8.     }  
9. }  

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：

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1. Student [id=1, name=student, dream=[soldier, scientist, pilot],score={math=90, english=85}, graduation=false]  
2. Teacher [id=1, name=teacher]  

Student [id=1, name=student, dream=[soldier, scientist, pilot],score={math=90, english=85}, graduation=false]Teacher [id=1, name=teacher]