ssm和springboot整合-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_67338832/article/details/127639128

官网：

MyBatis-PlusMyBatis-Plus 官方文档https://baomidou.com/

pom.xml

<dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.4.1</version>
        </dependency>
        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.31</version>
        </dependency>

application.yum


server:
    port: 8080
spring:
    application:
        name: springboot05
    datasource:
        driver-class-name: com.mysql.jdbc.Driver
        password: 123456
        url: jdbc:mysql://localhost:3306/t280?useUnicode=true&characterEncoding=UTF-8
        username: root
logging:
        level:
            com.ruojuan.springboot05: debug
mybatis-plus:
    mapper-locations: classpath:mappers/**/*.xml
    type-aliases-package: com.ruojuan.springboot05.book.model

Mybatis-plus代码生成类:

package com.ruojuan.springboot05.mp;


import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
import com.baomidou.mybatisplus.core.toolkit.StringPool;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.InjectionConfig;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.po.TableInfo;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


/**
 * @author ruojuan
 * @site www.ruojuan.com
 * @company 玉渊工作室
 * @create 2022年11月01日 16:37
 **/
/**
 * mybatis-plus代码生成
 */
public class MPGenerator {

    /**
     * <p>
     * 读取控制台内容
     * </p>
     */
    public static String scanner(String tip) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder help = new StringBuilder();
        help.append("请输入" + tip);
        System.out.println(help.toString());
        if (scanner.hasNext()) {
            String ipt = scanner.next();
            if (StringUtils.isNotBlank(ipt)) {
                if ("quit".equals(ipt)) return "";
                return ipt;
            }
        }
        throw new MybatisPlusException("请输入正确的" + tip + "！");
    }

    public static void main(String[] args) {
        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 1.全局配置
        GlobalConfig gc = new GlobalConfig();
        //System.getProperty("user.dir")指工作区间 就是20200904sal
        String projectPath = System.getProperty("user.dir") + "/springboot05";
        System.out.println(projectPath);

        gc.setOutputDir(projectPath + "/src/main/java");
        gc.setOpen(false);
        gc.setBaseResultMap(true);//生成BaseResultMap
        gc.setActiveRecord(false);// 不需要ActiveRecord特性的请改为false
        gc.setEnableCache(false);// XML 二级缓存
        gc.setBaseResultMap(true);// XML ResultMap
        gc.setBaseColumnList(true);// XML columList
        //gc.setSwagger2(true); //实体属性 Swagger2 注解
        gc.setAuthor("ruojuan");

        // 自定义文件命名，注意 %s 会自动填充表实体属性！
        gc.setMapperName("%sMapper");
        gc.setXmlName("%sMapper");
        gc.setServiceName("%sService");
        gc.setServiceImplName("%sServiceImpl");
        gc.setControllerName("%sController");

        gc.setIdType(IdType.AUTO);
        mpg.setGlobalConfig(gc);

        // 2.数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setDbType(DbType.MYSQL);
        dsc.setUrl("jdbc:mysql://localhost:3306/t280?useUnicode=true&characterEncoding=UTF-8");
        dsc.setDriverName("com.mysql.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("123456");
        mpg.setDataSource(dsc);

        // 3.包配置
        PackageConfig pc = new PackageConfig();
        String moduleName = scanner("模块名(quit退出，表示没有模块名)");
        if (StringUtils.isNotBlank(moduleName)) {
            pc.setModuleName(moduleName);
        }
        pc.setParent("com.ruojuan.springboot05")
                .setMapper("mapper")
                .setService("service")
                .setController("controller")
                .setEntity("model");
        mpg.setPackageInfo(pc);

        // 4.自定义配置
        InjectionConfig cfg = new InjectionConfig() {
            @Override
            public void initMap() {
                // to do nothing
            }
        };

        // 如果模板引擎是 freemarker
        String templatePath = "/templates/mapper.xml.ftl";
        // 自定义输出配置
        List<FileOutConfig> focList = new ArrayList<>();
        // 自定义配置会被优先输出
        focList.add(new FileOutConfig(templatePath) {
            @Override
            public String outputFile(TableInfo tableInfo) {
                // 自定义输出文件名 ， 如果你 Entity 设置了前后缀、此处注意 xml 的名称会跟着发生变化！！
                if (StringUtils.isNotBlank(pc.getModuleName())) {
                    return projectPath + "/src/main/resources/mappers/" + pc.getModuleName() + "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
                } else {
                    return projectPath + "/src/main/resources/mappers/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
                }
            }
        });
        cfg.setFileOutConfigList(focList);
        mpg.setCfg(cfg);
        // 配置模板
        TemplateConfig templateConfig = new TemplateConfig();
        templateConfig.setXml(null);
        mpg.setTemplate(templateConfig);

        // 5.策略配置
        StrategyConfig strategy = new StrategyConfig();
        // 表名生成策略(下划线转驼峰命名)
        strategy.setNaming(NamingStrategy.underline_to_camel);
        // 列名生成策略(下划线转驼峰命名)
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);
        // 是否启动Lombok配置
        strategy.setEntityLombokModel(true);
        // 是否启动REST风格配置
        strategy.setRestControllerStyle(true);
        // 自定义实体父类strategy.setSuperEntityClass("com.baomidou.mybatisplus.extension.activerecord.Model");
        // 自定义service父接口strategy.setSuperServiceClass("com.baomidou.mybatisplus.extension.service.IService");
        // 自定义service实现类strategy.setSuperServiceImplClass("com.baomidou.mybatisplus.extension.service.impl.ServiceImpl");
        // 自定义mapper接口strategy.setSuperMapperClass("com.baomidou.mybatisplus.core.mapper.BaseMapper");
        strategy.setSuperEntityColumns("id");

        // 写于父类中的公共字段plus
        strategy.setSuperEntityColumns("id");
        strategy.setInclude(scanner("表名，多个英文逗号分割").split(","));
        strategy.setControllerMappingHyphenStyle(true);

        //表名前缀(可变参数)：“t_”或”“t_模块名”，例如：t_user或t_sys_user
        strategy.setTablePrefix("t_", "t_sys_");
        //strategy.setTablePrefix(scanner("请输入表前缀"));
        mpg.setStrategy(strategy);
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        // 执行
        mpg.execute();
    }
}

然后自动生成：

MvcBookController.java开发：

基本的增删改查：

package com.ruojuan.springboot05.book.controller;


import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.ruojuan.springboot05.book.model.MvcBook;
import com.ruojuan.springboot05.book.service.MvcBookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * <p>
 *  前端控制器
 * </p>
 *
 * @author ruojuan
 * @since 2022-11-01
 */
@RestController
@RequestMapping("/mp")
public class MvcBookController {

    @Autowired
    private MvcBookService bookService;


    //查
    @GetMapping("/list")
    public List<MvcBook> list(){
        System.out.println("1212_"+123);
        return bookService.list();
    }


    //查单个
    @GetMapping("/get")
    public MvcBook get(MvcBook book){

        return bookService.getById(book.getBid());
    }

    //按条件查询
    @GetMapping("/listBy")
    public List<MvcBook> listBy(MvcBook book){
        //如果使用的是mybatis，那么我们需要重新写语句，现在不需要
        QueryWrapper qw = new QueryWrapper();
        qw.like("bname",book.getBname());
        return bookService.list(qw);
    }


    //增加
    @PutMapping("/add")
    public boolean add(MvcBook book){

        return  bookService.save(book);
    }

    //删除
    @DeleteMapping("/delete")
    public boolean delete(MvcBook book){

        return  bookService.removeById(book.getBid());
    }

    //修改
    @PostMapping("/update")
    public boolean update(MvcBook book){

        return  bookService.saveOrUpdate(book);
    }



   



}

多表的：

Controller.java

 //多表联查用户账户对应的
    @GetMapping("/getList")
    public List<Map> getList(String uname){
        Map map = new HashMap();
        map.put("username",uname);
        List<Map> maps = bookService.queryUserRole(map);
        return maps;
    }

service

public interface MvcBookService extends IService<MvcBook> {
    List<Map> queryUserRole(Map map);
}

impl

@Service
public class MvcBookServiceImpl extends ServiceImpl<MvcBookMapper, MvcBook> implements MvcBookService {
    @Autowired
    private MvcBookMapper bookMapper;
    public List<Map> queryUserRole(Map map){
        return bookMapper.queryUserRole(map);
    }
}

mapper

@Repository
public interface MvcBookMapper extends BaseMapper<MvcBook> {
    List<Map> queryUserRole(Map map);
}

xml

<select id="queryUserRole" parameterType="java.util.Map" resultType="java.util.Map">
        SELECT u.username,r.rolename FROM t_shiro_user u,t_shiro_user_role ur,t_shiro_role r
        where u.userid = ur.userid and ur.roleid = r.roleid
        <if test="username != null and username != ''">
            and u.username = #{username}
        </if>
    </select>