Spring Bean配置大全
2017年05月11日

案例一:组合配置

(1)枚举类型的属性

(2)使用构造函数赋值

(3)property结点下面用bean作为value

<bean id="jacksonMapper" class="org...Jackson2ObjectMapperFactoryBean">

  <property name="objectMapper">

    <!-- bean标签嵌套在property标签内部 -->

    <bean class="com.fasterxml.jackson.databind.ObjectMapper">

      <property name="serializationInclusion">

        <!-- 枚举类型值 -->

        <value type="com...JsonInclude.Include">NON_EMPTY</value>

      </property>

      <property name="dateFormat">

        <bean class="java.text.SimpleDateFormat">

          <!-- 构造函数 -->

          <constructor-arg type="java.lang.String" value="yyyy-MM-dd" />

        </bean>

      </property>

    </bean>

  </property>

  <property name="featuresToDisable">

    <array>

      <!-- 注入静态常量 -->

      <util:constant static-field="com...DeserializationFeature.UNKNOWN_PROP" />

    </array>

  </property>

</bean>

包含枚举类型属性:
<property name="serializationInclusion">
<value type="com.fasterxml.jackson.annotation.JsonInclude.Include">NON_EMPTY</value>
</property>

public enum Include {

    ALWAYS,

    NON_NULL,

    NON_EMPTY;

}


案例二:指定 init-method和destroy-method

<bean id="database" class="com.alibaba.druid.pool.DruidDataSource"

  init-method="init" destroy-method="close">

</bean>


案例三:使用 p-schema 给属性赋值

<bean id="multipartResolver" class="org.spring..CommonsMultipartResolver" p:defaultEncoding="utf-8">
  <property name="maxUploadSize" value="52428800"/>
  <property name="maxInMemorySize" value="52428800"/>
</bean>
需要声明如下:(红色部分)
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
   http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">


案例四:(1)使用 factory-bean & factory-method 构造对象

<!-- httpclient对象构建器 -->
<bean id="httpClientBuilder" class="org.apache.http.impl.client.HttpClientBuilder">
</bean>
<bean id="httpClient" class="org...client.CloseableHttpClient"
   factory-bean="httpClientBuilder" factory-method="build" destroy-method="close">
</bean>


案例五:使用scope=protoype定义bean,每次使用都创建新对象

    <!-- 每次都会创建一个 -->
    <bean id="httpClient" class="org.zollty.client.HttpClient"  scope="prototype">
    </bean>


案例六:混合构造函数和setter给属性赋值

<bean class="com.zollty.lightning.push.HttpConnectionMonitorThread">
   <constructor-arg index="0" ref="httpClientConnectionManager" />
   <property name="connectionIdleTimeout" value="${idle.timeout}"/>
</bean>


案例七:给Properties类型的属性赋值

<bean id="exceptionResolver" class="org...SimpleMappingResolver">

    <property name="exceptionMappings">
    <props>
      <prop key="java.lang.RuntimeException">exception/exception</prop>
      <prop key="java.lang.Exception">exception/exception</prop>
    </props>
    </property>
</bean>
private Properties exceptionMappings;
public void setExceptionMappings(Properties mappings) {
    this.exceptionMappings = mappings;
}


案例八:指定 在当前bean初始化之前,先初始化 其非直接依赖的beans

<bean id="lifecycle" class="org.apache.shiro.spring.LifecycleBeanPostProcessor"/>
<!-- 使用depends-on,指定在当前bean初始化之前,先初始化lifecycle
     ,注意当前bean实际上并没有注入lifecycle对象 -->
<bean class="org...DefaultAdvisorAutoProxyCreator" 
    depends-on="lifecycleBeanPostProcessor">
  <property name="proxyTargetClass" value="true" />
</bean>
备注:如果有多个非直接依赖的beans,则在depends-on可以用逗号分隔开。