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
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<?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
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<context:property-placeholder location="classpath:jdbc.properties"/>
1.3、jdbc.properties的配置如下
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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
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<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
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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("${jdbc_password}")
public String password;
}
1.6、在controller中调用
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@RequestMapping("/service/**")
@Controller
public class JdbcController{
@Autowired
private JdbcConfig Config; //引用统一的参数配置类
@Value("${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：
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{
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
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<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
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<?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
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<util:properties id="settings" location="classpath:config.properties"/>
2.3、config.properties的配置如下
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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
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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
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@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：
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{
"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
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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
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@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：
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{
"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：
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<?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
