=============
后端_博客业务
=============

1 添加Shiro工具类

/src/main/java/com/weihome/barblog/shiro/ShiroUtil.java：

/**
 * Shiro工具类
 */
public class ShiroUtil {
    /**
     * 获取账户概要
     */
    public static AccountProfile getAccountProfile() {
        return (AccountProfile) SecurityUtils
            .getSubject().getPrincipal();
    }
}

2 修改控制器框架

/src/main/java/com/weihome/barblog/controller/BlogController.java：

@RestController
public class BlogController {
    @Autowired
    BlogService blogService;
}

3 文章列表

/src/main/java/com/weihome/barblog/controller/BlogController.java：

...
public class BlogController {
    ...
    /**
     * 文章列表
     */
    @GetMapping("/blogs")
    public Result list(
        @RequestParam(defaultValue = "1") Integer currentPage) {
        Page page = new Page(currentPage, 5);
        IPage blogs = blogService.page(
            page, new QueryWrapper<Blog>().orderByDesc("created"));

        return Result.ok(blogs);
    }
    ...
}

http://localhost:8081/blogs?currentPage=1

{
    "code": 200,
    "message": "操作成功",
    "data": {
        "records": [
            {
                "id": 2,
                "userId": 2,
                "title": "小兔",
                "description": "小兔的自我介绍",
                "content": "我是小兔。",
                "created": "2022-03-22T14:00:00",
                "status": 0
            },
            {
                "id": 1,
                "userId": 1,
                "title": "小熊",
                "description": "小熊的自我介绍",
                "content": "我是小熊。",
                "created": "2022-03-22T13:00:00",
                "status": 0
            }
        ],
        "total": 2,
        "size": 5,
        "current": 1,
        "orders": [ ],
        "searchCount": true,
        "pages": 1
    }
}

4 文章详情

/src/main/java/com/weihome/barblog/controller/BlogController.java：

...
public class BlogController {
    ...
    /**
     * 文章详情
     */
    @GetMapping("/blog/{id}")
    public Result detail(@PathVariable(name = "id") Long id) {
        Blog blog = blogService.getById(id);
        Assert.notNull(blog, "该博客已被删除");

        return Result.ok(blog);
    }
    ...
}

http://localhost:8081/blog/1

{
    "code": 200,
    "message": "操作成功",
    "data": {
        "id": 1,
        "userId": 1,
        "title": "小熊",
        "description": "小熊的自我介绍",
        "content": "我是小熊。",
        "created": "2022-03-22T13:00:00",
        "status": 0
    }
}

5 保存文章

/src/main/java/com/weihome/barblog/controller/BlogController.java：

...
public class BlogController {
    ...
    /**
     * 保存文章
     */
    @RequiresAuthentication
    @PostMapping("/blog/save")
    public Result save(@Validated @RequestBody Blog blog) {
        // 待保存对象
        Blog save = null;
        // 当前用户的用户ID
        long userId = ShiroUtil.getAccountProfile().getId();

        // 更新旧文章
        if(blog.getId() != null) {
            save = blogService.getById(blog.getId());
            // 文章作者的用户ID必须与当前用户的
            // 用户ID一致，即只能更新自己的文章
            Assert.isTrue(
                save.getUserId().longValue() == userId, "无权更新");
        }
        // 添加新文章
        else {
            save = new Blog();
            save.setUserId(userId); // 当前用户即作者
            save.setCreated(LocalDateTime.now());
            save.setStatus(0);
        }

        BeanUtil.copyProperties(blog, save,
            "id", "userId", "created", "status"); // 复制内容
        blogService.saveOrUpdate(save); // 保存对象

        return Result.ok(null);
    }
    ...
}

Postman:
    POST
        localhost:8081/login
    Body
        raw/JSON
{
    "username": "bear",
    "password": "111111"
}
----------------------------
{
    "code": 200,
    "message": "操作成功",
    "data": {
        "id": 1,
        "avatar": "bear.png",
        "email": "johnmin74@hotmail.com",
        "username": "bear"
    }
}
Headers
    ...
    Authorization: eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9.eyJzdWIiOiIxIiwiaWF0IjoxNjQ4MDk4NTE5LCJleHAiOjE2NDg3MDMzMTl9.4Tmct-ITOtelHizNFNmWJVcqlctGp3bs3b7HFgSPtHBrkRGd-3K60pXkC1q7-o4m6angX_jn4jlhbn7t7U2v4w
    ...

Postman:
    POST
        localhost:8081/blog/save
    Headers
        Authorization: eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9.eyJzdWIiOiIxIiwiaWF0IjoxNjQ4MDk4NTE5LCJleHAiOjE2NDg3MDMzMTl9.4Tmct-ITOtelHizNFNmWJVcqlctGp3bs3b7HFgSPtHBrkRGd-3K60pXkC1q7-o4m6angX_jn4jlhbn7t7U2v4w
    Body
        raw/JSON
{
    "title": "保存文章",
    "description": "博客业务测试",
    "content": "鸿蒙初辟本无性"
}
-------------------------------------------------
{
    "code": 200,
    "message": "操作成功",
    "data": null
}

检查数据库：id=3

Postman:
    POST
        localhost:8081/blog/save
    Headers
        Authorization: eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9.eyJzdWIiOiIxIiwiaWF0IjoxNjQ4MDk4NTE5LCJleHAiOjE2NDg3MDMzMTl9.4Tmct-ITOtelHizNFNmWJVcqlctGp3bs3b7HFgSPtHBrkRGd-3K60pXkC1q7-o4m6angX_jn4jlhbn7t7U2v4w
    Body
        raw/JSON
{
    "id": "3",
    "title": "保存文章",
    "description": "博客业务测试",
    "content": "鸿蒙初辟本无性，打破顽冥须悟空。"
}
-------------------------------------------------
{
    "code": 200,
    "message": "操作成功",
    "data": null
}

检查数据库。