代码改变世界

spring-04

2018-11-05 21:39  crow!  阅读(170)  评论(0)  编辑  收藏  举报

集合注入

Member

 1 public class Member {
 2     private List<String> names ;
 3     private Set<String> emails ;
 4     private Map<String,String> tels ;
 5     private Properties infos ;
 6     
 7     public Properties getInfos() {
 8         return infos;
 9     }
10 
11     public void setInfos(Properties infos) {
12         this.infos = infos;
13     }
14 
15     public List<String> getNames() {
16         return names;
17     }
18 
19     public void setNames(List<String> names) {
20         this.names = names;
21     }
22 
23     public Set<String> getEmails() {
24         return emails;
25     }
26 
27     public void setEmails(Set<String> emails) {
28         this.emails = emails;
29     }
30 
31     public Map<String, String> getTels() {
32         return tels;
33     }
34 
35     public void setTels(Map<String, String> tels) {
36         this.tels = tels;
37     }
38 
39     @Override
40     public String toString() {
41         return "Member [names=" + names + ", emails=" + emails + ", tels=" + tels + ", infos=" + infos + "]";
42     }
43 }

applicationContext.xml

在默认情况下会用ArrayList为List接口实例化。
LinkedHashSet实例化Set 。结合了List的顺序保存，和Set的不容许重复。

        <bean id="member" class="cn.mldn.vo.Member" >
            <property name="names" >
                <!-- 这里不写value-type 也可以正确为集合设置内容  -->
                <list value-type="java.lang.String">
                    <value>Smith</value>
                    <value>Tony</value>
                    <value>Smith</value>
                </list>
            </property>
            <property name="emails">
                <set>
                    <value>test_123@qq.com</value>
                    <value>xiaohuang@163.com</value>
                    <value>bupbi@qq.com</value>
                    <value>bupbi@qq.com</value>
                </set>
            </property>
            <property name="tels">
                <map>
                    <entry key="110" value="公安" />
                    <entry>
                        <key><value>120</value></key>
                        <value>急救</value>
                    </entry>
                </map>
            </property>
            <property name="infos">
                <props>
                    <prop key="mldn">www.mldn.cn</prop>
                    <prop key="asdf">asdfasdfas</prop>
                </props>
            </property>
        </bean>

 

内部bean模式

        <bean id="emp" class="cn.mldn.vo.Emp">
            <property name="empno" value="7369"/>
            <!-- 如果不想设置内容可以写null标签或不写property -->
            <property name="ename" ><null/></property>
            <property name="retire" value="off" />
            <property name="dept" >
                <!-- 内部bean模式 -->
                <bean id="d" class="cn.mldn.vo.Dept" >
                    <property name="deptno" value="101" />
                    <property name="dname"  value="市场部" />
                    <property name="loc"  value="上海"/>
                </bean>
            </property>
        </bean>

 

P命名空间

public class Emp implements Serializable {
    private Integer empno ;
    private String  ename ;
    private Dept    dept  ;
    public Integer getEmpno() {
        return empno;
    }
    public void setEmpno(Integer empno) {
        this.empno = empno;
    }
    public String getEname() {
        return ename;
    }
    public void setEname(String ename) {
        this.ename = ename;
    }
    public Dept getDept() {
        return dept;
    }
    public void setDept(Dept dept) {
        this.dept = dept;
    }
    @Override
    public String toString() {
        return "Emp [empno=" + empno + ", ename=" + ename + ", dept=" + dept + "]";
    }
    
}
package cn.mldn.vo;

import java.beans.ConstructorProperties;
import java.io.Serializable;

@SuppressWarnings("serial")
public class Dept implements Serializable {
    
    private Integer deptno ;
    private String  dname ;
    private String  loc ;

    public Integer getDeptno() {
        return deptno;
    }

    public void setDeptno(Integer deptno) {
        this.deptno = deptno;
    }

    public String getDname() {
        return dname;
    }

    public void setDname(String dname) {
        this.dname = dname;
    }

    public String getLoc() {
        return loc;
    }

    public void setLoc(String loc) {
        this.loc = loc;
    }

    @Override
    public String toString() {
        return "Dept [deptno=" + deptno + ", dname=" + dname + ", loc=" + loc + "]";
    }
}
    <bean id="dept" class="cn.mldn.vo.Dept" p:deptno="10" p:dname="开发部" p:loc="北京" />
    <bean id="emp"  class="cn.mldn.vo.Emp"  p:empno="7369" p:ename="Smith" p:dept-ref="dept" />