项目结构改造

mall-common/src/main/java/com/macro/mall/common/api/CommonPage.java

@@ -0,0 +1,73 @@
+package com.macro.mall.common.api;
+
+import com.github.pagehelper.PageInfo;
+import org.springframework.data.domain.Page;
+
+import java.util.List;
+
+/**
+ * 分页数据封装类
+ */
+public class CommonPage<T> {
+    private Integer pageNum;
+    private Integer pageSize;
+    private Long totalPage;
+    private List<T> list;
+
+    /**
+     * 将PageHelper分页后的list转为分页信息
+     */
+    public static <T> CommonPage<T> restPage(List<T> list) {
+        CommonPage<T> result = new CommonPage<T>();
+        PageInfo<T> pageInfo = new PageInfo<T>(list);
+        result.setTotalPage(pageInfo.getTotal() / pageInfo.getPageSize());
+        result.setPageNum(pageInfo.getPageNum());
+        result.setPageSize(pageInfo.getPageSize());
+        result.setList(pageInfo.getList());
+        return result;
+    }
+
+    /**
+     * 将SpringData分页后的list转为分页信息
+     */
+    public static <T> CommonPage<T> restPage(Page<T> pageInfo) {
+        CommonPage<T> result = new CommonPage<T>();
+        result.setTotalPage((long) pageInfo.getTotalPages());
+        result.setPageNum(pageInfo.getNumber());
+        result.setPageSize(pageInfo.getSize());
+        result.setList(pageInfo.getContent());
+        return result;
+    }
+
+    public Integer getPageNum() {
+        return pageNum;
+    }
+
+    public void setPageNum(Integer pageNum) {
+        this.pageNum = pageNum;
+    }
+
+    public Integer getPageSize() {
+        return pageSize;
+    }
+
+    public void setPageSize(Integer pageSize) {
+        this.pageSize = pageSize;
+    }
+
+    public Long getTotalPage() {
+        return totalPage;
+    }
+
+    public void setTotalPage(Long totalPage) {
+        this.totalPage = totalPage;
+    }
+
+    public List<T> getList() {
+        return list;
+    }
+
+    public void setList(List<T> list) {
+        this.list = list;
+    }
+}

mall-common/src/main/java/com/macro/mall/common/api/CommonResult.java

@@ -0,0 +1,118 @@
+package com.macro.mall.common.api;
+
+/**
+ * 通用返回对象
+ */
+public class CommonResult<T> {
+    private long code;
+    private String message;
+    private T data;
+
+    /**
+     * 普通成功返回
+     *
+     * @param data 获取的数据
+     */
+    public static <T> CommonResult<T> success(T data) {
+        CommonResult<T> result = new CommonResult<T>();
+        result.setCode(ResultCode.SUCCESS.getCode());
+        result.setMessage(ResultCode.SUCCESS.getMsg());
+        result.setData(data);
+        return result;
+    }
+
+    /**
+     * 普通成功返回
+     *
+     * @param data 获取的数据
+     */
+    public static <T> CommonResult<T> success(T data,String message) {
+        CommonResult<T> result = new CommonResult<T>();
+        result.setCode(ResultCode.SUCCESS.getCode());
+        result.setMessage(message);
+        result.setData(data);
+        return result;
+    }
+
+    /**
+     * 通过错误码对象构造返回结果
+     */
+    public static <T> CommonResult<T> failed(IErrorCode errorCode) {
+        CommonResult<T> result = new CommonResult<T>();
+        result.setCode(errorCode.getCode());
+        result.setMessage(errorCode.getMsg());
+        return result;
+    }
+
+    /**
+     * 普通失败提示信息
+     */
+    public static <T> CommonResult<T> failed(String message) {
+        CommonResult<T> result = new CommonResult<T>();
+        result.setCode(ResultCode.FAILED.getCode());
+        result.setMessage(message);
+        return result;
+    }
+
+    /**
+     * 普通操作失败
+     */
+    public static <T> CommonResult<T> failed() {
+        return failed(ResultCode.FAILED);
+    }
+
+    /**
+     * 参数验证失败使用
+     */
+    public static <T> CommonResult<T> validateFailed() {
+        return failed(ResultCode.VALIDATE_FAILED);
+    }
+
+    /**
+     * 参数验证失败使用
+     */
+    public static <T> CommonResult<T> validateFailed(String message) {
+        CommonResult<T> result = new CommonResult<T>();
+        result.setCode(ResultCode.FAILED.getCode());
+        result.setMessage(message);
+        return result;
+    }
+
+    /**
+     * 用户没有登录
+     */
+    public static <T> CommonResult<T> unauthorized() {
+        return failed(ResultCode.UNAUTHORIZED);
+    }
+
+    /**
+     * 用户没有相应权限
+     */
+    public static <T> CommonResult<T> forbidden() {
+        return failed(ResultCode.UNAUTHORIZED);
+    }
+
+    public long getCode() {
+        return code;
+    }
+
+    public void setCode(long code) {
+        this.code = code;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public T getData() {
+        return data;
+    }
+
+    public void setData(T data) {
+        this.data = data;
+    }
+}

mall-common/src/main/java/com/macro/mall/common/api/IErrorCode.java

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+package com.macro.mall.common.api;
+
+/**
+ * 封装API的错误码
+ * Created by macro on 2019/4/19.
+ */
+public interface IErrorCode {
+    long getCode();
+
+    String getMsg();
+}

mall-common/src/main/java/com/macro/mall/common/api/ResultCode.java

@@ -0,0 +1,28 @@
+package com.macro.mall.common.api;
+
+/**
+ * 枚举了一些常用API操作码
+ * Created by macro on 2019/4/19.
+ */
+public enum ResultCode implements IErrorCode {
+    SUCCESS(200, "操作成功"),
+    FAILED(500, "操作失败"),
+    VALIDATE_FAILED(404, "参数检验失败"),
+    UNAUTHORIZED(401, "暂未登录或token已经过期"),
+    FORBIDDEN(403, "没有相关权限");
+    private long code;
+    private String msg;
+
+    private ResultCode(long code, String msg) {
+        this.code = code;
+        this.msg = msg;
+    }
+
+    public long getCode() {
+        return code;
+    }
+
+    public String getMsg() {
+        return msg;
+    }
+}