first can version

common/src/main/java/io/wdd/wddcommon/CommonApplication.java

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+package io.wdd.wddcommon;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class CommonApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(CommonApplication.class, args);
+    }
+
+}

common/src/main/java/io/wdd/wddcommon/utils/R.java

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+package io.wdd.wddcommon.utils;
+
+
+import lombok.Data;
+
+@Data
+public class R<T> {
+
+
+    int code;
+
+    String msg;
+
+    T data;
+
+    private R(int code, String msg, T data) {
+        this.code = code;
+        this.msg = msg;
+        this.data = data;
+    }
+
+    public R() {
+
+    }
+
+    public static <T> R<T> ok(T data) {
+        return resetResult(data, ResultStat.SUCCESS);
+    }
+
+    public static <T> R<T> okNoData() {
+        return new R();
+    }
+
+    public static <T> R<T> failed(T data) {
+        return resetResult(data, ResultStat.FAILED);
+    }
+
+    // access from inner
+    private static <T> R<T> resetResult(T data, ResultStat resultStat) {
+        return new R(resultStat.getCode(), resultStat.getDescription(), data);
+    }
+
+    // access to public
+    public static <T> R<T> resetResult(int code, String msg, T data) {
+        return new R<>(code
+                , msg, data);
+    }
+
+}

common/src/main/java/io/wdd/wddcommon/utils/ResultStat.java

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+package io.wdd.wddcommon.utils;
+
+public enum ResultStat {
+
+    SUCCESS(1000, "success"),
+
+    FAILED(5001, "failed"),
+
+    VALIDATE_FAILED(1002, "参数校验失败"),
+
+    PARAM_ERROR(1003, "请求参数错误！"),
+
+
+
+    BAD(5001, "all error !");
+
+    int code;
+
+    String description;
+
+    ResultStat(int code, String description){
+        this.code = code;
+        this.description = description;
+    }
+
+    public int getCode() {
+        return code;
+    }
+
+    public String getDescription(){
+        return description;
+    }
+}

common/src/main/resources/application.properties

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+

common/src/test/java/io/wdd/wddcommon/CommonApplicationTests.java

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+package io.wdd.wddcommon;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class CommonApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}