springboot、mybits、Thymeleaf使用

<?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 http://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>2.1.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>

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

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>  <!--mybatis-->
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.0.1</version>
        </dependency>

        <dependency>  <!--mysql-->
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>previous</scope>
        </dependency>

        <!-- 分页插件
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.3</version>
        </dependency>     -->   <!-- 版本 -->
        <dependency> <!-- JSON -->
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.12</version>
        </dependency>

        <dependency>  <!--thymeleaf-->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</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>

            <!-- mybatis generator 自动生成代码插件 -->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile>
                    <overwrite>true</overwrite>
                    <verbose>true</verbose>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/boot_demo?serverTimezone=UTC&useSSL=false
    username: root
    password: xu12chuan
    driver-class-name: com.mysql.cj.jdbc.Driver
  profiles:
    active: dev
  thymeleaf:
    mode: HTML
    cache: false
  mvc:
    view:
      prefix: /templates

mybatis:
  mapper-locations: classpath:mapping/*.xml
  type-aliases-package: com.example.demo.Entity
  configuration:
    map-underscore-to-camel-case: true # springboot - mybatis - 下划线与驼峰自动转换

server:
  port: 9008



#pagehelper分页插件
#pagehelper:
#  helperDialect: mysql
#  reasonable: true
#  supportMethodsArguments: true
#  params: count=countSql

package com.example.demo.controller;


import com.example.demo.Dao.AreaMapper;
import com.example.demo.Entity.Area;
//import com.example.demo.service.AreaService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import javax.websocket.server.PathParam;
import java.util.HashMap;
import java.util.Map;
import com.alibaba.fastjson.JSON;

@Controller
//@RequestMapping("/area")
public class AreaController {
    @Autowired
    private AreaMapper areaMapper;

    @ResponseBody
    @RequestMapping(value = "/get", produces = {"application/json;charset=UTF-8"})
    public Map<String,Object> getArea(@PathParam("areaId") Integer areaId){
        Map<String,Object> modelMap= new HashMap<String,Object>() ;
        modelMap.put("area",areaMapper.selectByPrimaryKey(areaId));
        return modelMap;
    }

    @ResponseBody
    @RequestMapping("get/{id}")
    public String findById(@PathVariable("id") Integer id) {
        return JSON.toJSONString(areaMapper.findOne(id));
    }

    @ResponseBody
    @RequestMapping("find")
    public String findUser() {
        return JSON.toJSONString(areaMapper.findAll());
    }

    @ResponseBody
    @RequestMapping(value = "/add", produces = {"application/json;charset=UTF-8"})
    public Map<String,Object> addArea(Area area){
        Map<String,Object> modelMap= new HashMap<String,Object>() ;
        modelMap.put("success",areaMapper.insertSelective(area)+1);
        return modelMap;
    }

    @GetMapping("/test")
    public String Test(){
        return "test";
    }
}

    /*
    @ResponseBody
    @RequestMapping(value = "/edit", produces = {"application/json;charset=UTF-8"})
    public Map<String,Object> editArea(Area area){
        Map<String,Object> modelMap= new HashMap<String,Object>() ;
        modelMap.put("success",areaMapper.updateByPrimaryKeySelective(area));
        return modelMap;
    }

    @RequestMapping(value = "/all/{pageNum}/{pageSize}", produces = {"application/json;charset=UTF-8"})
    public Object findAllArea(@PathVariable("pageNum") int pageNum, @PathVariable("pageSize") int pageSize){
        return areaService.findAllArea(pageNum,pageSize);
    }
    @ResponseBody
    @GetMapping(value="/del")
    public Map<String,Object> deleteArea(@PathParam("areaId") Integer areaId){
        Map<String,Object> modelMap= new HashMap<String,Object>() ;
        modelMap.put("success",areaMapper.deleteByPrimaryKey(areaId));
        return modelMap;
    }*/

package com.example.demo.controller;

import com.example.demo.Dao.AreaMapper;
import com.example.demo.Entity.Area;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;

@Controller
public class AreaHtmlController{
    @Autowired
    private AreaMapper areaMapper;

    @GetMapping("/addArea")
    public String addArea(Model model) {
        model.addAttribute("msg","Spring boot集成Thymeleaf");
        model.addAttribute("area", new Area());
        return "addArea";  //在templates中寻找addArea.html,而不会陷入循环
    }
    @RequestMapping(value = "/addArea",method = RequestMethod.POST, produces = {"application/json;charset=UTF-8"})
    public String addArea(@Valid @ModelAttribute Area area, BindingResult bindingResult){
        if (bindingResult.hasErrors()) {  // in com..Entity @NotEmpty  @Size(min=2, max=30)  and @Valid
            return "addArea";   //@ModelAttribute Area area --https://www.cnblogs.com/zhangshitong/p/5342076.html
        }else{
            Map<String,Object> modelMap= new HashMap<String,Object>() ;
            modelMap.put("success",areaMapper.insertSelective(area));
            return "addArea";
        }
    }
}

AreaHtmlController.java

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org"><!--引入thymeleaf-->
<head>
    <meta charset="UTF-8" />
    <title>添加区域</title></head>
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<body>
<h2 style="color:green;text-align: center;">添加区域</h2>
<p th:text="${msg}">你好</p>
<form class="form-horizontal" role="form" action="#" th:action="@{/addArea}" th:object="${area}" method="post">
    <div class="form-group">
        <label for="name" class="col-sm-2 control-label">
            区域名称：
        </label>
        <div class="col-sm-8">
            <input type="text" th:field="*{areaName}" class="form-control" id="areaName" placeholder="输入区域名称">
        </div>

        <label class="col-sm-2" style="color:red" th:if="${#fields.hasErrors('areaName')}" th:errors="*{areaName}">
            区域名称错误
        </label>
    </div>

    <div class="form-group">
        <label for="priority" class="col-sm-2 control-label">
            优先级
        </label>

        <div class="col-sm-8">
            <input type="text" th:field="*{priority}" class="form-control" id="priority" placeholder="输入优先级">
        </div>

        <label class="col-sm-2" style="color:red" th:if="${#fields.hasErrors('priority')}" th:errors="*{priority}">
            优先级错误
        </label>
    </div>

    <div class="form-group">
        <div class="col-sm-12" style="text-align: center">
            <button type="submit" class="btn btn-primary" id="btn">Submit</button>
            <input type="reset" class="btn btn-warning" value="Reset"/>
        </div>
    </div>
</form>
</body>
</html>