java常用配置

一、跨域配置

package cn.com.*.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**
 * 解决跨域问题
 */
@Configuration
public class CorsConfig implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowedMethods("GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS")
                .allowCredentials(true)
                .maxAge(3600)
                .allowedHeaders("*");
    }
}

二、swagger配置

package cn.com.*.config;

import com.github.xiaoymin.swaggerbootstrapui.annotations.EnableSwaggerBootstrapUI;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

/**
 * swagger配置
 */
@Configuration
@EnableSwagger2
@EnableSwaggerBootstrapUI
public class SwaggerConfig implements WebMvcConfigurer {

    @Value("${swagger.enable}")
    private boolean swaggerEnable;

    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .enable(swaggerEnable)
                .apiInfo(apiInfo())
                .groupName("xx服务")
                .select()
                .apis(RequestHandlerSelectors.withClassAnnotation(RestController.class))
                .paths(PathSelectors.any())
                .build();
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("xx服务文档")
                .description("xx服务文档1.0")
                .contact(new Contact("your-nick-name", "http://www.xxx.com.cn", "your-eamil@email.com.cn"))
                .version("1.0")
                .build();
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/swagger-ui.html").addResourceLocations(
                "classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**").addResourceLocations(
                "classpath:/META-INF/resources/webjars/");
    }
}

三、异常统一拦截配置

package cn.com.*.exception;

import cn.com.*.common.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice;

@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {

    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(value = MethodArgumentNotValidException.class)
    public Result handler(MethodArgumentNotValidException e) {
        log.error("实体校验异常：----------------{}", e);
        BindingResult bindingResult = e.getBindingResult();
        ObjectError objectError = bindingResult.getAllErrors().stream().findFirst().get();

        return Result.fail(objectError.getDefaultMessage());
    }
    
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(value = IllegalArgumentException.class)
    public Result handler(IllegalArgumentException e) {
        log.error("Assert异常：----------------{}", e);
        return Result.fail(e.getMessage());
    }

    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(value = IllegalArgumentException.class)
    public Result handler(IllegalArgumentException e) {
        log.error("Assert异常：----------------{}", e);
        return Result.fail(e.getMessage());
    }

    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(value = RuntimeException.class)
    public Result handler(RuntimeException e) {
        log.error("运行时异常：----------------{}", e);
        return Result.fail(e.getMessage());
    }

}