Spring 通过 XML 装配 Bean
🏷️ Spring
配置类 DbConfig
(假设是数据配置,拥有 4 个属性 driver
, url
, username
, password
)
点击查看代码
java
package xmlbean;
import org.springframework.stereotype.Component;
/**
* Created by liujiajia on 2017/3/7.
*/
//@Component
public class DbConfig {
private String driver;
private String url;
private String username;
private String password;
public String getDriver() {
return driver;
}
public void setDriver(String driver) {
this.driver = driver;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
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配置类 XmlBeanConfig
(使用 @ImportResource
标注导入配置文件 db-config.xml
)
java
package xmlbean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportResource;
/**
* Created by liujiajia on 2017/3/7.
*/
@Configuration
@ComponentScan
//@EnableAutoConfiguration
@ImportResource("classpath:db-config.xml")
public class XmlBeanConfig {
// public static void main(String[] args) {
//// SpringApplication.run(XMLConfig.class, args);
// }
}
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配置文件 db-config.xml (文件中定义了 DbConfig
类型的 Bean
)
xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
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.xsd">
<bean id="dbConfig" class="xmlbean.DbConfig">
<property name="driver" value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
<property name="url" value="jdbc:sqlserver://127.0.0.1:1433;databaseName=testdb" />
<property name="username" value="user001" />
<property name="password" value="pwd001" />
</bean>
</beans>
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测试代码 XmlBeanConfigTest
(测试 dbConfig
已经自动导入,并且值同 xml 文件中的配置一致)
点击查看代码
java
package xmlbean;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
/**
* Created by liujiajia on 2017/3/7.
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = XmlBeanConfig.class)
public class XmlBeanConfigTest {
@Autowired
private DbConfig dbConfig;
@Test
public void cdShouldNotBeNull() {
assertNotNull(dbConfig);
}
@Test
public void configShouldEqualTheSettingInConfigXML() {
assertEquals("com.microsoft.sqlserver.jdbc.SQLServerDriver", dbConfig.getDriver());
assertEquals("jdbc:sqlserver://127.0.0.1:1433;databaseName=testdb", dbConfig.getUrl());
assertEquals("user001", dbConfig.getUsername());
assertEquals("pwd001", dbConfig.getPassword());
}
}
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执行测试,结果应该是两个绿色的。
pom.xml
文件 (仅供参考)
点击查看代码
xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.2.RELEASE</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>WireBean</artifactId>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>RELEASE</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/com.github.stefanbirkner/system-rules -->
<dependency>
<groupId>com.github.stefanbirkner</groupId>
<artifactId>system-rules</artifactId>
<version>1.16.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
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