接下来就是完成增删改查的功能了，首先在config包下配置Druid数据连接池,在配置之前先把相关配置在application.preperties中完善

application.preperties

# 下面为连接池的补充设置，应用到上面所有数据源中

# 初始化大小，最小，最大

spring.datasource.initialSize=5

spring.datasource.minIdle=5

spring.datasource.maxActive=30

# 配置获取连接等待超时的时间

spring.datasource.maxWait=60000

# 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒

spring.datasource.timeBetweenEvictionRunsMillis=60000

# 配置一个连接在池中最小生存的时间，单位是毫秒

spring.datasource.minEvictableIdleTimeMillis=300000

spring.datasource.validationQuery=SELECT 1 FROM DUAL

spring.datasource.testWhileIdle=true

spring.datasource.testOnBorrow=false

spring.datasource.testOnReturn=false

# 打开PSCache，并且指定每个连接上PSCache的大小

spring.datasource.poolPreparedStatements=true

spring.datasource.maxPoolPreparedStatementPerConnectionSize=20

# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙

spring.datasource.filters=stat,wall,log4j

# 通过connectProperties属性来打开mergeSql功能；慢SQL记录

spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

# 合并多个DruidDataSource的监控数据

spring.datasource.useGlobalDataSourceStat=true

# Druid 监控 Servlet 配置参数

spring.datasource.druidRegistrationUrl: /druid/*

spring.datasource.resetEnable: true

spring.datasource.loginUsername: admin

spring.datasource.loginPassword: 1234

# Druid 监控过滤相关配置参数

spring.datasource.filtersUrlPatterns: /*

spring.datasource.exclusions: '*.js,*.gif,*.jpg,*.jpeg,*.png,*.css,*.ico,*.jsp,/druid/*'

spring.datasource.sessionStatMaxCount: 2000

spring.datasource.sessionStatEnable: true

spring.datasource.principalSessionName: session_user_key

spring.datasource.profileEnable: true

#druid datasouce database settings end

上面配置完之后开始完成Druid数据连接池配置

在config包->新建DruidDbConfig类

DruidDBConfig类

@Configurationpublic class DruidDBConfig { // private Logger logger = LoggerFactory.getLogger(DruidDBConfig.class); @Value("${spring.datasource.driver-class-name}") private String driverClassName; @Value("${spring.datasource.url}") private String dbUrl; @Value("${spring.datasource.username}") private String username; @Value("${spring.datasource.password}") private String password; @Value("${spring.datasource.initialSize}") private int initialSize; @Value("${spring.datasource.minIdle}") private int minIdle; @Value("${spring.datasource.maxActive}") private int maxActive; @Value("${spring.datasource.maxWait}") private int maxWait; @Value("${spring.datasource.timeBetweenEvictionRunsMillis}") private int timeBetweenEvictionRunsMillis; @Value("${spring.datasource.minEvictableIdleTimeMillis}") private int minEvictableIdleTimeMillis; @Value("${spring.datasource.validationQuery}") private String validationQuery; @Value("${spring.datasource.testWhileIdle}") private boolean testWhileIdle; @Value("${spring.datasource.testOnBorrow}") private boolean testOnBorrow; @Value("${spring.datasource.testOnReturn}") private boolean testOnReturn; @Value("${spring.datasource.poolPreparedStatements}") private boolean poolPreparedStatements; @Value("${spring.datasource.maxPoolPreparedStatementPerConnectionSize}") private int maxPoolPreparedStatementPerConnectionSize; @Value("${spring.datasource.filters}") private String filters; @Value("{spring.datasource.connectionProperties}") private String connectionProperties; @Bean //声明其为Bean实例 @Primary //在同样的DataSource中，首先使用被标注的DataSource public DataSource dataSource(){ DruidDataSource datasource = new DruidDataSource(); datasource.setUrl(this.dbUrl); datasource.setUsername(username); datasource.setPassword(password); datasource.setDriverClassName(driverClassName); //configuration datasource.setInitialSize(initialSize); datasource.setMinIdle(minIdle); datasource.setMaxActive(maxActive); datasource.setMaxWait(maxWait); datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis); datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis); datasource.setValidationQuery(validationQuery); datasource.setTestWhileIdle(testWhileIdle); datasource.setTestOnBorrow(testOnBorrow); datasource.setTestOnReturn(testOnReturn); datasource.setPoolPreparedStatements(poolPreparedStatements); datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize); try { datasource.setFilters(filters); } catch (SQLException e) { // logger.error("druid configuration initialization filter", e); } datasource.setConnectionProperties(connectionProperties); return datasource; }}

上述配置中的日志已经注释了，如果需要配置可以在resources中加入logback-spring.xml：

resources->logback-spring.xml

logback-spring.xml

<?xml version="1.0" encoding="UTF-8"?><configuration scan="true" scanPeriod="60 seconds" debug="false"> <contextName>logback</contextName> <!--自己定义一个log.path用于说明日志的输出目录--> <property name="log.path" value="/log/jiangfeixiang/"/> <!--输出到控制台--> <appender name="console" class="ch.qos.logback.core.ConsoleAppender"> <!-- <filter class="ch.qos.logback.classic.filter.ThresholdFilter"> <level>ERROR</level> </filter>--> <encoder> <pattern>%d{HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> </appender> <!--输出到文件--> <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender"> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>${log.path}/logback.%d{yyyy-MM-dd}.log</fileNamePattern> </rollingPolicy> <encoder> <pattern>%d{HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> </appender> <root level="debug"> <appender-ref ref="console"/> <appender-ref ref="file"/> </root> <!-- logback为java中的包 --> <logger name="com.example.springboootmybatis.controller"/></configuration>

UserServiec接口

public interface UserService { /** * 查询所有用户 */ public List<User> getAllUser(); /** * 保存用户 * @param user */ void saveUser(User user); /** * 根据id查询用户 */ User getById(Integer id); /** * 校验用户名 * @param userName * @return */ Boolean checkUserName(String userName); /** * 修改用户 * @param user */ void updateUser(User user); /** * 根据id删除用户 * @param id */ void deleteUser(Integer id); /** * 全选删除 * @param useridList */ void deleteBatchUser(List<Integer> useridList);}

UserServiceImpl实现类

@Service@Transactionalpublic class UserServiceImpl implements UserService { //注入 @Autowired private UserMapper userMapper; /** * 查询所有用户 */ @Override public List<User> getAllUser() { List<User> users = userMapper.selectByExample(null); return users; } /** * 根据id查询用户 */ @Override public User getById(Integer id) { User user = userMapper.selectByPrimaryKey(id); return user; } /** * 添加用户 * @param user */ @Override public void saveUser(User user) { userMapper.insertSelective(user); } /** * 校验用户名是否存在 * @param userName * @return * 数据库没有这条记录，count==0，返回true */ @Override public Boolean checkUserName(String userName) { UserExample example=new UserExample(); UserExample.Criteria criteria=example.createCriteria(); criteria.andUsernameEqualTo(userName); long count=userMapper.countByExample(example); if(count==0){ return true; } return false; } /** * 修改用户 * @param user */ @Override public void updateUser(User user) { userMapper.updateByPrimaryKeySelective(user); } /** * 根据id删除（单个） * @param id */ @Override public void deleteUser(Integer id) { userMapper.deleteByPrimaryKey(id); } /** * 批量删除 * @param useridList */ @Override public void deleteBatchUser(List<Integer> useridList) { /* UserExample example=new UserExample(); UserExample.Criteria criteria=example.createCriteria(); criteria.andUseridIn(useridList); userMapper.deleteByExample(example);*/ }}

UserController

@RestController@RequestMapping(value = "/user")public class UserController { //注入 @Autowired private UserService userService; /** * 查询所有用户 */ @ApiOperation(value="获取用户列表") @RequestMapping(value = "/user",method = RequestMethod.GET) public List<User> getListAll(){ List<User> listAll = userService.getAllUser(); return listAll; } /** * 用户保存 * @return */ @ApiOperation(value = "添加用户",notes = "根据user添加用户") @ApiImplicitParam(name = "user",value = "用户user",required = true,dataType = "User") @RequestMapping(value = "/users",method = RequestMethod.POST) public String saveUser(@RequestBody User user){ userService.saveUser(user); return "success"; } /** * 根据id查询 */ @ApiOperation(value = "根据id查询") @ApiImplicitParam(name = "id",value = "用户id") @RequestMapping(value = "/{id}",method = RequestMethod.GET) public User getById(@PathVariable("id") Integer id){ User user = userService.getById(id); return user; } /** * 校验用户名 * @param username * @return */ @ApiOperation(value = "校验用户名") @ApiImplicitParam(name = "userName",value = "用户名",required = true,dataType = "String") @RequestMapping(value = "/{username}",method = RequestMethod.POST) public Boolean checkUserName(@PathVariable("username")String username){ Boolean aboolean = userService.checkUserName(username); if (aboolean){ return true; }else { return false; } } /** * 修改用户 * @param user */ @ApiOperation(value = "修改用户") @ApiImplicitParam(name = "user",value = "用户",required = true,dataType = "User") @RequestMapping(value = "/user",method = RequestMethod.PUT) public String updateUser(@RequestBody User user){ userService.updateUser(user); return "success"; } /** * 根据id删除用户 */ @ApiOperation(value = "根据id删除用户") @ApiImplicitParam(name = "id",value = "用户id",required = true,dataType = "Integer") @RequestMapping(value = "/{id}",method = RequestMethod.DELETE) public String deleteUser(@PathVariable Integer id){ userService.deleteUser(id); return "success"; }}

controller类中使用了swgger2如下：

springboot中整合swgger2

pom.xml

<!--swgger2--> <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>

springbootmybatis包下创建SwaggerConfig.java

SwaggerConfig

@Configuration@EnableSwagger2public class SwaggerConfig { @Bean public Docket createRestApi() { ApiInfo apiInfo = new ApiInfoBuilder() .title("使用Swagger2构建RESTful APIs") //标题 .description("客户端与服务端接口文档") //描述 .termsOfServiceUrl("") //域名地址 .contact("姜飞祥") //作者 .version("1.0.0") //版本号 .build(); return new Docket(DocumentationType.SWAGGER_2) .apiInfo(apiInfo) .select() .apis(RequestHandlerSelectors.basePackage("com.example.springbootmybatis")) .paths(PathSelectors.any()) .build(); }}

以上就算完成了，写的不好请见谅。具体测试请参考下面的springboot整合swgger2,之后访问即可，和

备注：

springboot整合swgger2参考:的Mapper接口以及Example的实例函数及详解： Generator最完整配置详解：