SpringBoot整合MybatisPlus並實現分頁查詢
阿新 • • 發佈：2018-11-30
首先https://start.spring.io/下載一個springBoot的demo。
然後增加pomyila依賴，引入以下pom，除了MybatisPlus其他自己分配
<?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> <groupId>com.shiyan.my</groupId> <artifactId>my</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <name>demo</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.3.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-boot-starter --> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.0.6</version> </dependency> <!-- freemarker --> <dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> </dependency> <!-- fastjson --> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.15</version> </dependency> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>4.1.4</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> <version>2.2.2</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger-ui</artifactId> <version>2.2.2</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> <finalName>demo</finalName> </build> </project>
application.properties配置檔案如下：具體引數自己配置
server.port=8080 server.servlet.context-path=/sys #mysql spring.datasource.url=jdbc:mysql://localhost:3306/user?useUnicode=true&characterEncoding=utf8 spring.datasource.username=root spring.datasource.password=root spring.datasource.driver-class-name=com.mysql.jdbc.Driver mybatis-plus.mapper-locations=classpath:/mapper/*.xml mybatis-plus.type-aliases-package=com.shiyan.demo.beans mybatis-plus.global-config.id-type=0 mybatis-plus.global-config.db-column-underline=true mybatis-plus.global-config.capital-mode=true logging.level.com.shiyan.demo.mapper=debug
程式碼生成器部分程式碼，不完善
@Test public void testGenerator() { // 全域性配置 GlobalConfig config = new GlobalConfig(); config.setActiveRecord(true) // 是否支援AR模式 .setAuthor("ais") // 作者 .setOutputDir("E:\\xuexi\\demo\\src\\main\\java") // 生成路徑 .setFileOverride(true)// 檔案覆蓋 .setServiceName("%sService").setBaseColumnList(true).setBaseResultMap(true) // 設定生成的service介面名 /* 首字母是否為I */ .setIdType(IdType.AUTO); // 主鍵策略//資料來源配置 DataSourceConfig dsConfig = new DataSourceConfig(); dsConfig.setDbType(DbType.MYSQL).setUrl("jdbc:mysql://localhost:3306/user") .setDriverName("com.mysql.jdbc.Driver").setUsername("root").setPassword("root"); // 策略配置 StrategyConfig stConfig = new StrategyConfig(); stConfig.setCapitalMode(true) // 全域性大寫命名 //.setDbColumnUnderline(true) // 表名 欄位名 是否使用下滑線命名 .setNaming(NamingStrategy.underline_to_camel) // 資料庫表對映到實體的命名策略 .setInclude("tbl_employee") // 生成的表 .setTablePrefix("tbl_"); // 表字首 // 包名策略 PackageConfig pkConfig = new PackageConfig(); pkConfig.setParent("com.shiyan.demo").setController("controller").setEntity("beans").setService("service"); AutoGenerator ag = new AutoGenerator().setGlobalConfig(config).setDataSource(dsConfig).setStrategy(stConfig) .setPackageInfo(pkConfig); ag.execute(); }
重點：MybatisPlusConfig的配置主要是載入一些外掛注入bean
@Configuration
@EnableTransactionManagement
@MapperScan("com.shiyan.demo.mapper*")
//掃描dao或者是Mapper介面
public class MybatisPlusConfig {
@Bean
public PaginationInterceptor paginationInterceptor() {
PaginationInterceptor page = new PaginationInterceptor();
page.setDialectType("mysql");
return page;
}
@Bean
public PerformanceInterceptor performanceInterceptor() {
PerformanceInterceptor page = new PerformanceInterceptor();
page.setFormat(true);
return page;
}
//配置mybatis的分頁外掛pageHelper
@Bean
public PageHelper pageHelper(){
PageHelper pageHelper = new PageHelper();
Properties properties = new Properties();
properties.setProperty("offsetAsPageNum","true");
properties.setProperty("rowBoundsWithCount","true");
properties.setProperty("reasonable","true");
properties.setProperty("dialect","mysql"); //配置mysql資料庫的方言
pageHelper.setProperties(properties);
return pageHelper;
}
}SwaggerConfig的配置檔案如下
@Configuration
@EnableSwagger2
public class SwaggerConfig {
@Bean
public Docket createRestApi() throws IOException {
return new Docket(DocumentationType.SWAGGER_2).apiInfo(apiInfo()).select().apis(RequestHandlerSelectors.basePackage("com.shiyan.demo")).paths(PathSelectors.any()).build();
}
private ApiInfo apiInfo() throws IOException {
return new ApiInfoBuilder().title("誓言--------").termsOfServiceUrl("http://data.***.com/").contact("***").version("0.0.1").build();
}
}EmployeeController 分頁的有兩個，一個是MybatisPlus自己封裝的一個是PageHelper。
MybatisPlus分頁外掛：單表操作可以用selectPage，下面是測試程式碼，個人推薦用MybatisPlus的分頁，強大，簡潔
@Api("測試")
@RestController
public class EmployeeController {
@Resource
private EmployeeService employeeService;
@ApiOperation(value = "獲取所有使用者")
@PostMapping("/queryAll")
public List<Employee> queryEmployees() {
List<Employee> selectList = employeeService.list();
return selectList;
}
@ApiOperation(value = "新增使用者")
@PostMapping("/insert")
public Integer insert(@RequestBody Employee employee) {
Employee employee2 = new Employee();
employee2.setAge(employee.getAge());
employee2.setGender(employee.getGender());
employee2.setLastName(employee.getLastName());
employee2.setEmail(employee.getEmail());
employeeService.save(employee2);
return employee2.getId();
}
@ApiOperation(value = "修改使用者")
@PostMapping("/update")
public boolean update(@RequestBody Employee employee) {
Employee employee2 = new Employee();
employee2.setAge(employee.getAge());
employee2.setGender(employee.getGender());
employee2.setLastName(employee.getLastName());
employee2.setEmail(employee.getEmail());
employee2.setId(employee.getId());
boolean update = employeeService.update(employee2, null);
return update;
}
@ApiOperation(value = "刪除使用者")
@PostMapping("/delete")
public boolean delete(@RequestBody Integer id) {
boolean update = employeeService.removeById(id);
return update;
}
@ApiOperation(value = "根據ID獲取使用者")
@PostMapping("/getByid")
public Employee getByid(@RequestBody Integer id) {
Employee byid = employeeService.getByid(id);
return byid;
}
@ApiOperation(value = "所有")
@PostMapping("/getAll")
public IPage<Employee> getAllssss(@RequestBody PageInput input) {
Page<Employee> page = new Page<>(input.getPageNum(), input.getPageSize());
IPage<Employee> all = employeeService.getAll(page);
return all;
}
@ApiOperation(value = "所有2")
@PostMapping("/getAll2")
public List<Employee> getAllssss2(@RequestBody PageInput input) {
PageHelper.startPage(input.getPageNum(), input.getPageSize());
List<Employee> all = employeeService.getAll2();
Long all2 = employeeService.getAll();
PageBean<Employee> pageData = new PageBean<>(input.getPageNum(), input.getPageSize(), all2.intValue());
pageData.setItems(all);
List<Employee> items = pageData.getItems();
return items;
}看下結果：
菜鳥分享===============================PS：Ais永恆