#179 spel & @value 使用姿势实例

spring-boot/002-properties-value/src/main/java/com/git/hui/boot/properties/value/Application.java

@@ -1,6 +1,8 @@
 package com.git.hui.boot.properties.value;
 
+import com.alibaba.fastjson.JSONObject;
 import com.git.hui.boot.properties.value.config.ConfigProperties;
+import com.git.hui.boot.properties.value.config.SpelProperties;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
@@ -17,11 +19,20 @@ public class Application {
     @Autowired
     private ConfigProperties configProperties;
 
+    @Autowired
+    private SpelProperties spelProperties;
+
     @GetMapping("show")
     public String showProperties() {
         return configProperties.toJsonStr();
     }
 
+
+    @GetMapping("spel")
+    public SpelProperties showSpel() {
+        return spelProperties;
+    }
+
     public static void main(String[] args) {
         SpringApplication.run(Application.class);
     }

spring-boot/002-properties-value/src/main/java/com/git/hui/boot/properties/value/config/SpelProperties.java

@@ -0,0 +1,71 @@
+package com.git.hui.boot.properties.value.config;
+
+import lombok.Data;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+/**
+ * @author yihui
+ * @date 21/6/12
+ */
+@Data
+@Component
+public class SpelProperties {
+
+    @Value("1 + 2")
+    private String common;
+
+    @Value("demo_${auth.jwt.token}")
+    private String prefixConf;
+
+    @Value("#{'abcd'}")
+    private String spelStr;
+
+    /**
+     * 基本计算
+     */
+    @Value("#{1 + 2}")
+    private String spelVal3;
+
+    /**
+     * 列表
+     */
+    @Value("#{{1, 2, 3}}")
+    private List<Integer> spelList;
+
+    /**
+     * map
+     */
+    @Value("#{{a: '123', b: 'cde'}}")
+    private Map spelMap;
+
+
+    /**
+     * 嵌套使用，从配置中获取值，然后执行SpEL语句
+     */
+    @Value("#{'${auth.jwt.token}'.substring(2)}")
+    private String spelLen;
+
+    /**
+     * 调用静态方法
+     */
+    @Value("#{T(com.git.hui.boot.properties.value.config.SpelProperties).uuid('${auth.jwt.token}_')}")
+    private String spelStaticMethod;
+
+    /**
+     * bean 方法访问
+     */
+    @Value("#{randomService.randUid()}")
+    private String spelBeanMethod;
+
+    @Value("${￥{auth.jwt.token}}")
+    private String selfProperty;
+
+    public static String uuid(String prefix) {
+        return prefix + UUID.randomUUID().toString().replaceAll("_", ".");
+    }
+}

spring-boot/002-properties-value/src/main/java/com/git/hui/boot/properties/value/config/selfdefine/SelfPropertiesSource.java

@@ -0,0 +1,42 @@
+package com.git.hui.boot.properties.value.config.selfdefine;
+
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.MapPropertySource;
+import org.springframework.stereotype.Component;
+
+import javax.annotation.PostConstruct;
+import javax.annotation.Resource;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * @author yihui
+ * @date 21/6/12
+ */
+@Component
+public class SelfPropertiesSource extends MapPropertySource {
+    @Resource
+    private ConfigurableEnvironment environment;
+
+    public SelfPropertiesSource(String name, Map<String, Object> source) {
+        super(name, source);
+    }
+
+    public SelfPropertiesSource() {
+        this("SelfPropertiesSource", new HashMap<>());
+    }
+
+    @PostConstruct
+    public void init() {
+        environment.getPropertySources().addFirst(this);
+    }
+
+    @Override
+    public Object getProperty(String name) {
+        if (name.startsWith("￥") && name.endsWith("}")) {
+            name = name.substring(2, name.length() - 2);
+            return super.getProperty(name) + " (一灰灰blog) ";
+        }
+        return super.getProperty(name);
+    }
+}