Spring Bean高级配置方法大全

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

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。