SpringMVC加载配置Properties文件的几种方式
最近开发的项目使用了SpringMVC的框架,用下来感觉SpringMVC的代码实现的非常优雅,功能也非常强大, 网上介绍Controller参数绑定、URL映射的文章都很多了,写这篇博客主要总结一下SpringMVC加载配置Properties文件的几种方式
通过读取Config文件的配置
例如:
Map<String, String> group = ConfigurationManager.GetConfiguration("config1");
this.setBcpApi(group.get("BCP.Webapi"));
this.setAppCode(group.get("BCP.AppCode"));
this.setGetCustomerApi(group.get("GetCustomer"));
1.通过context:property-placeholde实现配置文件加载 1.1、在spring.xml中加入context相关引用 [html] view plain copy <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> 1.2、引入jdbc配置文件 [html] view plain copy <context:property-placeholder location="classpath:jdbc.properties"/> 1.3、jdbc.properties的配置如下 [html] view plain copy jdbc_driverClassName=com.mysql.jdbc.Driver jdbc_url=jdbc:mysql://localhost/testdb?useUnicode=true&characterEncoding=utf8 jdbc_username=root jdbc_password=123456 1.4、在spring-mybatis.xml中引用jdbc中的配置 [html] view plain copy <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close" > <property name="driverClassName"> <value>${jdbc_driverClassName}</value> </property> <property name="url"> <value>${jdbc_url}</value> </property> <property name="username"> <value>${jdbc_username}</value> </property> <property name="password"> <value>${jdbc_password}</value> </property> <!-- 连接池最大使用连接数 --> <property name="maxActive"> <value>20</value> </property> <!-- 初始化连接大小 --> <property name="initialSize"> <value>1</value> </property> <!-- 获取连接最大等待时间 --> <property name="maxWait"> <value>60000</value> </property> <!-- 连接池最大空闲 --> <property name="maxIdle"> <value>20</value> </property> <!-- 连接池最小空闲 --> <property name="minIdle"> <value>3</value> </property> <!-- 自动清除无用连接 --> <property name="removeAbandoned"> <value>true</value> </property> <!-- 清除无用连接的等待时间 --> <property name="removeAbandonedTimeout"> <value>180</value> </property> <!-- 连接属性 --> <property name="connectionProperties"> <value>clientEncoding=UTF-8</value> </property> </bean> 1.5、在java类中引用jdbc.properties中的配置 [html] view plain copy import org.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.Configuration; @Configuration public class JdbcConfig{ @Value("${jdbc_url}") public String jdbcUrl; //这里变量不能定义成static @Value("${jdbc_username}") public String username; @Value("${jdbc_password}") public String password; } 1.6、在controller中调用 [html] view plain copy @RequestMapping("/service/**") @Controller public class JdbcController{ @Autowired private JdbcConfig Config; //引用统一的参数配置类 @Value("${jdbc_url}") private String jdbcUrl; //直接在Controller引用 @RequestMapping(value={"/test"}) public ModelMap test(ModelMap modelMap) { modelMap.put("jdbcUrl", Config.jdbcUrl); return modelMap; } @RequestMapping(value={"/test2"}) public ModelMap test2(ModelMap modelMap) { modelMap.put("jdbcUrl", this.jdbcUrl); return modelMap; } } 1.7、测试 在ie中输入http://localhost:8080/testWeb/service/test 或http://localhost:8080/testWeb/service/test2 返回如下结果: [java] view plain copy { jdbcUrl:"jdbc:mysql://localhost/testdb?useUnicode=true&characterEncoding=utf8" } 注:通过context:property-placeholde加载多个配置文件 只需在第1.2步中将多个配置文件以逗号分隔即可 [html] view plain copy <context:property-placeholder location="classpath:jdbc.properties,classpath:XXX.properties"/> 2、通过util:properties实现配置文件加载 2.1、在spring.xml中加入util相关引用 [html] view plain copy <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"> 2.2、 引入config配置文件 [html] view plain copy <util:properties id="settings" location="classpath:config.properties"/> 2.3、config.properties的配置如下 [html] view plain copy gnss.server.url=http://127.0.0.1:8080/gnss/services/data-world/rest 2.4、在java类中引用config中的配置 [html] view plain copy import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Component; @Component public class Config { @Value("#{settings['gnss.server.url']}") public String GNSS_SERVER_URL; } 2.5、在controller中调用 [html] view plain copy @RequestMapping("/service2/**") @Controller public class ConfigController{ @Autowired private Config Config; //引用统一的参数配置类 @RequestMapping(value={"/test"}) public ModelMap test(ModelMap modelMap) { modelMap.put("gnss.service.url",Config.GNSS_SERVER_URL); return modelMap; } } 2.6、测试 在ie中输入http://localhost:8080/testWeb/service2/test 返回如下结果: [html] view plain copy { "gnss.service.url":"http://127.0.0.1:8080/gnss/services/data-world/rest" } 3.直接在Java类中通过注解实现配置文件加载 3.1、在java类中引入配置文件 [java] view plain copy import org.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.PropertySource; @Configuration @PropertySource(value="classpath:config.properties") public class Config { @Value("${gnss.server.url}") public String GNSS_SERVER_URL; @Value("${gnss.server.url}") public String jdbcUrl; } 3.2、在controller中调用 [java] view plain copy @RequestMapping("/service2/**") @Controller public class ConfigController{ @Autowired private Config Config; //引用统一的参数配置类 @RequestMapping(value={"/test"}) public ModelMap test(ModelMap modelMap) { modelMap.put("gnss.service.url", Config.GNSS_SERVER_URL); return modelMap; } } 3.3、测试 在ie中输入http://localhost:8080/testWeb/service2/test 返回如下结果: [java] view plain copy { "gnss.service.url":"http://127.0.0.1:8080/gnss/services/data-world/rest" } 最后附上spring.xml的完整配置: [html] view plain copy <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"> <!-- 引入jdbc配置文件 --> <context:property-placeholder location="classpath:jdbc.properties"/> <!-- 引入多配置文件 --> <context:property-placeholder location="classpath:jdbc.properties,classpath:XXX.properties"/> <!-- 通过util引入config配置文件 --> <!-- <util:properties id="settings" location="classpath:config.properties" /> --> <!-- 扫描文件(自动将servicec层注入) --> <context:component-scan base-package="修改成你的Config类所在的package"/></beans> 个人分类: java web