SpringBoot+MyBatisPlus+MySql+vue2+elementUi的案例、java访问数据库服务、java提供接口服务

前言

1、项目不使用前后端分离。
2、在创建SpringBoot的时候要注意各个插件间的版本问题。
3、后端技术SpringBoot+MyBatisPlus+MySql。
4、前端技术vue2+elementUi。

后端关键代码

简单介绍

1、数据库名称ssm_db
2、表名称tbl_book

数据表对象文件(Book.java)

package com.example.domain;

import lombok.Data;

@Data
public class Book {
    private Integer id;
    private String type;
    private String name;
    private String description;
}

配置文件(application.yml)

server:
  port: 80

spring:
  datasource:
    druid:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3306/ssm_db?serverTimezone=UTC
      username: root
      password: root

mybatis-plus:
  global-config:
    db-config:
      table-prefix: tbl_
      id-type: auto
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

创建项目后，在resources文件夹下把application的后缀名改为yml。

接口文件(BookController.java)

写到这个文件就可以使用Postman进行接口测试了。

package com.example.controller;

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.example.controller.utils.R;
import com.example.domain.Book;
import com.example.service.IBookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.io.IOException;

@RestController
@RequestMapping("/books")
public class BookController {
    @Autowired
    private IBookService bookService;

    @GetMapping
    public R getAll() {
        return new R(true, bookService.list());
    }

    @PostMapping
    public R save(@RequestBody Book book) throws IOException {
//        R r = new R();
//        boolean flag = bookService.save(book);
//        r.setFlag(flag);

//        上面的三行代表这一行
//        new R(bookService.save(book));
//        return r;

//        抛出异常测试
//        if (book.getName().equals("123")) throw new IOException();
        boolean flag = bookService.save(book);

        return new R(flag, flag ? "添加成功^_^！" : "添加失败-_-！");
    }

    @PutMapping
    public R update(@RequestBody Book book) throws IOException {
        boolean flag = bookService.modify(book);

        return new R(flag, flag ? "编辑成功^_^！" : "编辑失败-_-！");
    }

    @DeleteMapping("{id}")
    public R delete(@PathVariable Integer id) {
        boolean flag = bookService.delete(id);

        return new R(flag, flag ? "删除成功^_^！" : "数据同步失败，自动刷新-_-！");
    }

    @GetMapping("{id}")
    public R getById(@PathVariable Integer id) {
        // 数据同步失败，自动刷新
        return new R(true, bookService.getById(id));
    }

//    分页
//    @GetMapping("{currentPage}/{pageSize}")
//    public R getPage(@PathVariable int currentPage, @PathVariable int pageSize) {
//        IPage<Book> page = bookService.getPage(currentPage, pageSize);
//        if (currentPage > page.getPages()) {
//            page = bookService.getPage((int) page.getPages(), pageSize);
//        }
//        return new R(true, page, "查询成功^_^！");
//    }

    //    分页加查询
    @GetMapping("{currentPage}/{pageSize}")
//    可以单独接收，也可以使用集合
//    public R getPage(@PathVariable int currentPage, @PathVariable int pageSize, String name, Book book) {
//    直接使用集合接收参数
    public R getPage(@PathVariable int currentPage, @PathVariable int pageSize, Book book) {
        IPage<Book> page = bookService.getPage(currentPage, pageSize, book);

        if (currentPage > page.getPages()) {
            page = bookService.getPage((int) page.getPages(), pageSize, book);
        }

        System.out.println(page);
        return new R(true, page);
    }
}

技术整合文件(pom.xml)

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.15</version>
        <relativePath/>
    </parent>

    <groupId>com.example</groupId>
    <artifactId>singleFableFullStack</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.3</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.6</version>
        </dependency>

        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

前端关键代码

<!DOCTYPE html>
<html>

<head>
    <!-- 页面meta -->
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>SpringBoot+MyBatisPlus整合的SSM案例</title>
    <meta content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no" name="viewport">

    <!-- 引入样式 -->
    <link rel="stylesheet" href="../plugins/elementui/index.css">
    <link rel="stylesheet" href="../plugins/font-awesome/css/font-awesome.min.css">
    <link rel="stylesheet" href="../css/style.css">
</head>

<body class="hold-transition">
<div id="app">
    <div class="content-header">
        <h1>图书管理</h1>
    </div>

    <div class="app-container">
        <div class="box">
            <div class="filter-container">
                <el-input placeholder="图书类别" v-model="pagination.type" style="width: 200px;"
                          class="filter-item" clearable @input="handleInput($event,'type')"></el-input>
                <el-input placeholder="图书名称" v-model="pagination.name" style="width: 200px;"
                          class="filter-item" clearable @input="handleInput($event,'name')"></el-input>
                <el-input placeholder="图书描述" v-model="pagination.description" style="width: 200px;"
                          class="filter-item" clearable @input="handleInput($event,'description')"></el-input>
                <el-button type="info" plain class="dalfBut" @click="handleSearch">查询</el-button>
                <el-button type="success" plain class="butT" @click="handleDialog(undefined, '1')">新建
                </el-button>
            </div>

            <el-table
                    size="small"
                    current-row-key="id"
                    :data="dataList"
                    stripe
                    highlight-current-row
            >
                <el-table-column type="index" align="center" label="序号"></el-table-column>
                <el-table-column prop="type" label="图书类别" align="center"></el-table-column>
                <el-table-column prop="name" label="图书名称" align="center"></el-table-column>
                <el-table-column prop="description" label="描述" align="center"></el-table-column>
                <el-table-column label="操作" align="center">
                    <template slot-scope="scope">
                        <el-button type="primary" plain size="mini" @click="handleDialog(scope.row, '2')">编辑
                        </el-button>
                        <el-button type="danger" plain size="mini" @click="handleDelete(scope.row)">删除</el-button>
                    </template>
                </el-table-column>
            </el-table>

            <!--分页组件-->
            <div class="pagination-container">
                <el-pagination
                        class="pagiantion"
                        @current-change="handleCurrentChange"
                        @size-change="handlePageSize"
                        :current-page="pagination.currentPage"
                        :page-size="pagination.pageSize"
                        :page-sizes="[5, 10, 15, 30]"
                        layout="total, sizes, prev, pager, next, jumper"
                        :total="pagination.total">
                </el-pagination>
            </div>

            <!-- 新增/编辑标签弹层 -->
            <div class="add-form">
                <el-dialog :title="dialogTitle==='1'?'新增图书':'编辑图书'" :visible.sync="isDialogAddEdit"
                           @close="handleClose">
                    <el-form :model="formData" :rules="rules" ref="refForm" label-position="right"
                             label-width="100px">
                        <el-row>
                            <el-col :span="12">
                                <el-form-item label="图书类别" prop="type">
                                    <el-input v-model="formData.type"/>
                                </el-form-item>
                            </el-col>

                            <el-col :span="12">
                                <el-form-item label="图书名称" prop="name">
                                    <el-input v-model="formData.name"/>
                                </el-form-item>
                            </el-col>
                        </el-row>

                        <el-row>
                            <el-col :span="24">
                                <el-form-item label="描述">
                                    <el-input v-model="formData.description" type="textarea"></el-input>
                                </el-form-item>
                            </el-col>
                        </el-row>
                    </el-form>

                    <div slot="footer" class="dialog-footer">
                        <el-button @click="isDialogAddEdit=false">取消</el-button>
                        <el-button type="primary" @click="handleSave()">保存</el-button>
                    </div>
                </el-dialog>
            </div>
        </div>
    </div>
</div>
</body>

<!-- 引入组件库 -->
<script src="../js/vue.js"></script>
<script src="../plugins/elementui/index.js"></script>
<script type="text/javascript" src="../js/jquery.min.js"></script>
<script src="../js/axios-0.18.0.js"></script>
<script>
    new Vue({
        el: '#app',
        data: {
            // 当前页要展示的列表数据
            dataList: [],
            // 添加表单是否可见
            isDialogAddEdit: false,
            dialogTitle: '1',
            // 表单数据
            formData: {},
            // 校验规则
            rules: {
                type: [
                    {
                        required: true,
                        message: '图书类别为必填项',
                        trigger: 'blur'
                    }
                ],
                name: [
                    {
                        required: true,
                        message: '图书名称为必填项',
                        trigger: 'blur'
                    }
                ]
            },
            // 分页相关模型数据
            pagination: {
                // 当前页码
                currentPage: 1,
                // 每页显示的记录数
                pageSize: 5,
                // 总记录数
                total: 0,
                type: '',
                name: '',
                description: ''
            },
            // 整页加载
            fullPageLoading: undefined
        },

        // 钩子函数，VUE对象初始化完成后自动执行
        created() {
            // 调用查询全部数据的操作
            this.getAll();
        },

        methods: {
            // 列表加分页查询
            getAll() {
                let {
                        currentPage,
                        pageSize,
                        type,
                        name,
                        description
                    } = this.pagination,
                    param = '';

                param += `?type=${type}&name=${name}&description=${description}`;

                this.handleFullPageLoading('start');
                // 发送异步请求
                axios.get(`/books/${currentPage}/${pageSize}${param}`)
                    .then(({data: {flag, data: {records, total, size, current}}}) => {
                        if (flag) {
                            this.pagination.currentPage = current;
                            this.pagination.pageSize = size;
                            this.pagination.total = total;
                            this.dataList = records;
                        } else {
                            this.$message.error('出错了');
                        }
                    })
                    .finally(() => {
                        this.handleFullPageLoading('stopping');
                    })
                    .catch(() => {
                        this.$message.error('出错了');
                    });
            },

            // 整页(页面)加载
            handleFullPageLoading(type) {
                if (type === 'start') {
                    this.fullPageLoading = this.$loading({
                        lock: true,
                        text: '加载中',
                        spinner: 'el-icon-loading',
                        background: 'rgba(0, 0, 0, 0.5)'
                    });
                } else if (type === 'stopping' && this.fullPageLoading) {
                    this.fullPageLoading.close();
                    this.fullPageLoading = undefined;
                }
            },

            // 打开新增/编辑面板
            handleDialog(row, str) {
                this.dialogTitle = str;
                this.isDialogAddEdit = true;

                if (str === '2') this.getById(row);
            },

            // 关闭新增/编辑面板
            handleClose() {
                this.$refs.refForm.resetFields();
                this.$refs.refForm.clearValidate();
                this.formData = {};
            },

            // 保存
            handleSave() {
                this.$refs.refForm.validate(valid => {
                    if (!valid) return this.$message.warning('必填项内容为空');

                    if (this.dialogTitle === '1') {
                        this.handleAdd();
                    } else {
                        this.handleEdit();
                    }
                });
            },

            // 添加
            handleAdd() {
                axios.post("/books", this.formData)
                    .then(({data: {flag, msg}}) => {
                        if (flag) {
                            this.$message.success(msg);
                            this.getAll();
                            this.isDialogAddEdit = false
                        } else {
                            this.$message.error(msg);
                        }
                    })
                    .catch(() => {
                        this.$message.error('出错了');
                    });
            },

            // 删除
            handleDelete(row) {
                this.$confirm(
                    '此操作永久删除当前信息，是否继续？',
                    '提示',
                    {
                        type: "warning"
                    }
                )
                    .then(() => {
                        axios.delete("/books/" + row.id)
                            .then(({data: {flag, msg}}) => {
                                // 判断当前操作是否成功
                                if (flag) {
                                    this.$message.success(msg);
                                    this.getAll();
                                } else {
                                    this.$message.error(msg);
                                }
                            })
                            .catch(() => {
                                this.$message.error('出错了');
                            });
                    })
                    .catch(() => {
                        this.$message.info('已取消');
                    });
            },

            // 通过id获取数据
            getById(row) {
                axios.get('/books/' + row.id)
                    .then(({data: {flag, data}}) => {
                        if (flag && data !== null) {
                            this.formData = data;
                        } else {
                            this.$message.error('出错了');
                        }
                    })
                    .catch(() => {
                        this.$message.error('出错了');
                    });
            },

            // 编辑
            handleEdit() {
                axios.put("/books", this.formData)
                    .then(({data: {flag, msg}}) => {
                        // 判断当前操作是否成功
                        if (flag) {
                            this.$message.success(msg);
                            this.getAll();
                            this.isDialogAddEdit = false
                        } else {
                            this.$message.error(msg);
                        }
                    })
                    .catch(() => {
                        this.$message.error('出错了');
                    });
            },

            // 切换页码
            handleCurrentChange(currentPage) {
                if (this.pagination.currentPage === currentPage) return false;

                this.pagination.currentPage = currentPage;
                this.$nextTick(() => this.getAll());
            },

            // 页码大小
            handlePageSize(pageSize) {
                if (this.pagination.pageSize === pageSize) return false;

                this.pagination.pageSize = pageSize;
                this.$nextTick(() => this.getAll());
            },

            // 搜索输入框值变化
            handleInput(e, searchField) {
                if (!e) {
                    this.pagination[searchField] = e;
                    this.$nextTick(() => this.getAll());
                }
            },

            // 查询
            handleSearch() {
                let {
                    type,
                    name,
                    description
                } = this.pagination;

                if (type || name || description) this.getAll();
            }
        }
    });
</script>

</html>

完整代码

下载

git clone -b back-end-services https://gitee.com/mssj200224/open-resources.git

项目

1、找到仓库中名为singleFableFullStack文件夹复制出来。
2、使用idea打开项目即可运行。文章来源地址https://www.toymoban.com/news/detail-684938.html

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