1、json接口开发

    在Controller接口增加注解@RestController即可自动返回json数据

2、自定义Filter

    在web开发中经常会使用到filters用于日志记录、排除xss威胁、执行权限验证等，SpringBoot中自动添加了OrderedCharacterEncodingFilter和HiddenHttpMethodFilter，也可自定义Filter

    1、实现Filter接口，实现Filter方法

    2、添加Configuration注解，将自定义Filter加入过滤链

@Configuration
public class WebConfiguration {
    @Bean
    public RemoteIpFilter remoteIpFilter() {
        return new RemoteIpFilter();
    }

    @Bean
    public FilterRegistrationBean testFilterRegistration() {

        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new MyFilter());
        registration.addUrlPatterns("/*");
        registration.addInitParameter("paramName", "paramValue");
        registration.setName("MyFilter");
        registration.setOrder(1);
        return registration;
    }

    public class MyFilter implements Filter {
        @Override
        public void destroy() {
            // TODO Auto-generated method stub
        }

        @Override
        public void doFilter(ServletRequest srequest, ServletResponse sresponse, FilterChain filterChain)
                throws IOException, ServletException {
            // TODO Auto-generated method stub
            HttpServletRequest request = (HttpServletRequest) srequest;
            System.out.println("this is MyFilter,url :"+request.getRequestURI());
            filterChain.doFilter(srequest, sresponse);
        }

        @Override
        public void init(FilterConfig arg0) throws ServletException {
            // TODO Auto-generated method stub
        }
    }
}

3、自定义property
    配置在application.properties中，格式为name=value

    使用配置项

     @Value("${com.neo.title}")
     private String title;

4、log配置

    在application.properties中配置输出的地址和输出级别

logging.path=/user/local/log
logging.level.com.favorites=DEBUG
logging.level.org.springframework.web=INFO
logging.level.org.hibernate=ERROR

    path为本机存log的路径，logging.level 后面可以根据包路径配置不同资源的log级别

5、数据库操作

    使用springBoot对mysql进行增加删查改操作

    1、添加相关依赖包

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
     <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>

2、application.properties增加数据库相关配置

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.max-idle=10
spring.datasource.max-wait=10000
spring.datasource.min-idle=5
spring.datasource.initial-size=5

server.port=8011
server.session.timeout=10
server.tomcat.uri-encoding=UTF-8

3、Controller类测试数据库连接并查询

    @Autowired
    private JdbcTemplate jdbcTemplate;//数据库链接
    @RequestMapping("/queryAllProduct")
    public List<Map<String, Object>> queryAllProduct(){
        String sql="select * from product ";
        List<Map<String, Object>> list=jdbcTemplate.queryForList(sql);
        return list;
    }
    //通过查询参数查询
    @RequestMapping("/queryProduct/{id}")
    public Map<String,Object> queryProductByID(@PathVariable String id){
        String sql="select * from product where id=?";
        return jdbcTemplate.queryForMap(sql, new Object[]{id});
    }