Springboot + Vue 个人博客 后端交互样例

Springboot + Vue 个人博客 后端交互样例

后端的样例 使用了ResultUtil来进一步封装返回数据
重点在于Comment 和 Reply查询返回的过程 实现楼中楼 评论的效果

目录

Springboot + Vue 个人博客 主目录
Springboot + Vue 个人博客 前端配置
Springboot + Vue 个人博客 后端配置
Springboot + Vue 个人博客 前端交换样例
Springboot + Vue 个人博客 后端交换样例

代码

Github 后端代码
Github 前端代码

1. Result数据的封装

//用于返回互联网数据
public class Result<T> {
    //状态码
    private Integer code;
    //消息
    private String message;
    //具体数据
    private T data;
    
    //省略 constructer getter setter toString
}

public enum ResultEnum {

    SUCCESS(200,"成功"),
    ERROR(404,"出错");

    //状态码
    private Integer code;
    //消息
    private String message;

    //省略 constructer getter setter toString
}    

//用于返回具体result对象
public class ResultUtil{

    //返回成功状态码和消息以及数据
    public static Result success(Object data){
        return new Result(ResultEnum.SUCCESS.getCode(),ResultEnum.SUCCESS.getMessage(),data);
    }

    //返回错误状态码和消息以及数据
    public static Result error(Object data){
        return new Result(ResultEnum.ERROR.getCode(),ResultEnum.ERROR.getMessage(),data);
    }
}

2. Comment(Servcie Controller Mapper)

2.1 com.example.demo.domain.Comment

public class Comment implements Serializable {
    private Integer id;         //评论id
    private Integer articleId;  //文章id
    private Integer userId;     //用户id
    private String content;     //文章内容
    private String time;        //时间
    private List<Reply> replyList; //回复列表
}

2.2 com.example.demo.mapper.CommentMapper

@Mapper
@Repository
public interface CommentMapper {
    //  增
    void addComment(Comment comment);
    //  删
    void delComment(Integer id);
    //  查
    Comment findeCommentById(Integer id);
    // 查询评论
    List<Comment> findCommentByArticleId(Integer articleId);
    //  改
    void saveComment(Comment comment);
}

2.3 com.example.demo.service.CommentService

public interface CommentService {
    //  增
    void addComment(Comment comment);
    //  删
    void delComment(Integer id);
    //  查
    Comment findeCommentById(Integer id);
    // 查询评论
    List<Comment> findCommentByArticleId(Integer pageNum,Integer pageSize,Integer articleId);
    //  改
    void saveComment(Comment comment);
}

2.4 com.example.demo.service.impl.CommentServiceImpl

@Service
public class CommentServiceImpl implements CommentService {

    @Autowired
    private CommentMapper commentMapper;

    @Autowired
    private ReplyService replyService;

    // 增
    @Override
    public void addComment(Comment comment) {
        commentMapper.addComment(comment);
    }

    // 删
    @Override
    public void delComment(Integer id) {
        commentMapper.delComment(id);
    }

    // 查
    @Override
    public Comment findeCommentById(Integer id) {
        Comment comment=commentMapper.findeCommentById(id);
        List<Reply> replyList=replyService.findAllReplyByCommentId(comment.getId());
        if(replyList!=null){
            comment.setReplyList(replyList);
        }
        return  comment;
    }

    // 查询评论
    @Override
    public List<Comment> findCommentByArticleId(Integer pageNum,Integer pageSize, Integer articleId) {
        PageHelper.startPage(pageNum,pageSize);
        List <Comment> commentList=commentMapper.findCommentByArticleId(articleId);
        List <Comment> updateList=new ArrayList<Comment>();
        //封装reply对象
        for(int i=0;i<commentList.size();i++){
            Comment comment=commentList.get(i);
            //调用replyService查询部分回复
            List<Reply> replyList=replyService.findPartReplyByCommentId(comment.getId());
            if(replyList!=null){
                comment.setReplyList(replyList);
            }
            updateList.add(comment);
        }
        //返回新的List
        return updateList;
    }

    // 改
    @Override
    public void saveComment(Comment comment) {
        commentMapper.saveComment(comment);
    }
}

2.5 com.example.demo.controller.CommentController

@RestController
@RequestMapping(path="/comment")
public class CommentController {

    @Autowired
    private CommentService commentService;

    //添加评论
    @PostMapping("/add")
    public Result addComment(@RequestBody  Comment comment){
        System.out.println(comment);
        //commentService.addComment(comment);
        return ResultUtil.success(null);
    }

    //id查询评论
    @GetMapping("/find/{id}")
    public Result findCommentById(@PathVariable("id") Integer id){
        Comment comment=commentService.findeCommentById(id);
        return ResultUtil.success(comment);
    }

    //查询评论
    @GetMapping("/{articleId}/{pageNum}/{pageSize}")
    public Result findComment(@PathVariable("articleId") Integer articleId,
                                     @PathVariable("pageNum") Integer pageNum,
                                     @PathVariable("pageSize") Integer pageSize){
        List<Comment> commentList=commentService.findCommentByArticleId(pageNum,pageSize,articleId);


        return ResultUtil.success(commentList);
    }

    //使用 qs 添加评论
    @PostMapping("/add2")
    public Result addComment(@RequestParam("articleId") Integer articleId,
                             @RequestParam("userId") Integer userId,
                             @RequestParam("time") String time,
                             @RequestParam("content") String content){
        System.out.println(articleId+" "+userId+" "+time+" "+content);
        //commentService.addComment(comment);
        return ResultUtil.success(null);
    }
}

2.6 rescources.mapper.CommentMapper.xml

<mapper namespace="com.example.demo.mapper.CommentMapper">
    <resultMap id="commentMap" type="com.example.demo.domain.Comment">
        <id property="id" column="id">id>
        <result property="articleId" column="article_id">result>
        <result property="userId" column="user_id">result>
        <result property="articleId" column="article_id">result>
        <result property="time" column="time">result>
    resultMap>




    <insert id="addComment" parameterType="com.example.demo.domain.Comment">
        insert into comment
        <trim prefix="(" suffix=")" suffixOverrides=",">
            <if test="articleId!=null">
                article_id,
            if>
            <if test="userId!=null">
                user_id,
            if>
            <if test="content!=null">
                content,
            if>
            <if test="time!=null">
                time,
            if>
        trim>
        <trim prefix="values(" suffix=")" suffixOverrides=",">
            <if test="articleId!=null">
                #{articleId},
            if>
            <if test="userId!=null">
                #{userId},
            if>
            <if test="content!=null">
                #{content},
            if>
            <if test="time!=null">
                #{time},
            if>
        trim>
    insert>



    <delete id="delComment" parameterType="java.lang.Integer">
        delete from comment where id = #{id}
    delete>



    <select id="findeCommentById" parameterType="java.lang.Integer" resultType="com.example.demo.domain.Comment">
        select * from comment where id = #{id}
    select>


    <select id="findCommentByArticleId" parameterType="java.lang.Integer" resultType="com.example.demo.domain.Comment">
        select * from comment where article_id = #{articleId}
    select>



    <update id="saveComment" parameterType="com.example.demo.domain.Comment">
        update comment
        <trim prefix="set" suffixOverrides=",">
            <if test="articleId!=null">
                article_id = #{articleId},
            if>
            <if test="userId!=null">
                user_id = #{userId},
            if>
            <if test="content!=null">
                content = #{content},
            if>
            <if test="time!=null">
                time = #{time},
            if>
        trim>
        where id = #{id}
    update>
mapper>