提交《Spring核心技术》第11章代码

pom.xml

@@ -19,6 +19,7 @@
         <module>spring-annotation-chapter-08</module>
         <module>spring-annotation-chapter-09</module>
         <module>spring-annotation-chapter-10</module>
+        <module>spring-annotation-chapter-11</module>
     </modules>
 
     <properties>

spring-annotation-chapter-11/pom.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">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>io.binghe.spring</groupId>
+        <artifactId>spring-annotation-book</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>spring-annotation-chapter-11</artifactId>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>
\ No newline at end of file

spring-annotation-chapter-11/src/main/java/io/binghe/spring/annotation/chapter11/ValueTest.java

+/**
+ * Copyright 2022-9999 the original author or authors.
+ * <p>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.binghe.spring.annotation.chapter11;
+
+import io.binghe.spring.annotation.chapter11.config.ValueConfig;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
+/**
+ * @author binghe(微信 : hacker_binghe)
+ * @version 1.0.0
+ * @description
+ * @github https://github.com/binghe001
+ * @copyright 公众号: 冰河技术
+ */
+public class ValueTest {
+
+    public static void main(String[] args) {
+        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ValueConfig.class);
+        ValueConfig valueConfig = context.getBean(ValueConfig.class);
+        System.out.println(valueConfig.toString());
+    }
+}

spring-annotation-chapter-11/src/main/java/io/binghe/spring/annotation/chapter11/bean/ValueName.java

+/**
+ * Copyright 2022-9999 the original author or authors.
+ * <p>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.binghe.spring.annotation.chapter11.bean;
+
+import org.springframework.stereotype.Component;
+
+/**
+ * @author binghe(微信 : hacker_binghe)
+ * @version 1.0.0
+ * @description @Value注解的Bean
+ * @github https://github.com/binghe001
+ * @copyright 公众号: 冰河技术
+ */
+@Component
+public class ValueName {
+
+    private String name;
+
+    public ValueName() {
+        this.name = "binghe";
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

spring-annotation-chapter-11/src/main/java/io/binghe/spring/annotation/chapter11/config/ValueConfig.java

+/**
+ * Copyright 2022-9999 the original author or authors.
+ * <p>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.binghe.spring.annotation.chapter11.config;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.core.io.Resource;
+
+/**
+ * @author binghe(微信 : hacker_binghe)
+ * @version 1.0.0
+ * @description @Value注解案例的配置类
+ * @github https://github.com/binghe001
+ * @copyright 公众号: 冰河技术
+ */
+@Configuration
+@ComponentScan(value = {"io.binghe.spring.annotation.chapter11"})
+@PropertySource(value = {"classpath:test.properties"})
+public class ValueConfig {
+
+    /**
+     * 注入普通字符串
+     */
+    @Value("normalString")
+    private String normalString;
+
+    /**
+     * 注入操作系统名称
+     */
+    @Value("#{systemProperties['os.name']}")
+    private String osName;
+
+    /**
+     * 注入表达式的结果
+     */
+    @Value("#{ T(java.lang.Math).random() * 100.0 }")
+    private double randomNum;
+
+    /**
+     * 注入其他Bean的属性
+     */
+    @Value("#{valueName.name}")
+    private String name;
+
+    /**
+     * 注入配置文件中的值
+     */
+    @Value("${db.url}")
+    private String dbUrl;
+
+    @Override
+    public String toString() {
+        return "ValueConfig{" +
+                "normalString='" + normalString + '\'' +
+                ", osName='" + osName + '\'' +
+                ", randomNum=" + randomNum +
+                ", name='" + name + '\'' +
+                ", dbUrl='" + dbUrl + '\'' +
+                '}';
+    }
+}

spring-annotation-chapter-11/src/main/resources/test.properties

+db.url=jdbc:mysql://localhost:3306/test
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