手机网站建设电话,百度搜索量,网站建设 中企动力阀门,wordpress 菜单字体【JavaEE】进阶 个人博客系统#xff08;2#xff09; 文章目录 【JavaEE】进阶 个人博客系统#xff08;2#xff09;1. 统一返回格式处理1.1 统一返回类common.CommonResult1.2 统一返回处理器component.ResponseAdvice 2. 统一异常处理3. 拦截器实现3.1 全局变量SESSI… 【JavaEE】进阶 · 个人博客系统2 文章目录 【JavaEE】进阶 · 个人博客系统21. 统一返回格式处理1.1 统一返回类common.CommonResult1.2 统一返回处理器component.ResponseAdvice 2. 统一异常处理3. 拦截器实现3.1 全局变量SESSION_KEY3.2 session工具类SessionUtils3.3 拦截器 UserInterceptor3.4 配置类 AppConfig 【JavaEE】进阶 · 个人博客系统2
【JavaEE】Spring全家桶实现AOP-统一处理_s:103的博客-CSDN博客
为了让代码更加低耦合高内聚符合单一设计原则所以进行一些统一处理
1. 统一返回格式处理
1.1 统一返回类common.CommonResult
Data
public class CommonResult {private int code; //状态码private String msg; //状态码描述信息private Object data; //返回数据public static CommonResult success(Object data) {CommonResult result new CommonResult();result.setCode(200);result.setMsg(成功);result.setData(data);return result;}public static CommonResult success(Object data, String msg) {CommonResult result new CommonResult();result.setCode(200);result.setMsg(msg);result.setData(data);return result;}public static CommonResult fail(int code, String msg) {CommonResult result new CommonResult();result.setCode(code);result.setMsg(msg);return result;}public static CommonResult fail(int code, String msg, Object data) {CommonResult result new CommonResult();result.setCode(code);result.setMsg(msg);result.setData(data);return result;}}1.2 统一返回处理器component.ResponseAdvice
ControllerAdvice
ResponseBody
public class ResponseAdvice implements ResponseBodyAdvice {Overridepublic boolean supports(MethodParameter returnType, Class converterType) {return true;//我要重写~}Autowiredprivate ObjectMapper objectMapper;//Spring中自带了个 Bean是 ObjectMapper,所以可以注入Overridepublic Object beforeBodyWrite(Object body, MethodParameter returnType,MediaType selectedContentType, Class selectedConverterType,ServerHttpRequest request, ServerHttpResponse response) {if(body instanceof Result) {//body 有 Result对象向上转型而来已经包装好了的~return body;}if(body instanceof String) {try {return objectMapper.writeValueAsString(Result.success(body));} catch (JsonProcessingException e) {e.printStackTrace();}}return Result.success(body);}
}当然统一返回处理一般针对的是百密一疏的缺漏情况controller里的接口mapping中没有使用CommonResult类的包装方法的mapping即默认的一个返回处理而 平常我们写的时候都是自己调用CommonResult类的包装方法 ~
String类型进行统一返回响应的类型还是text/html所以前端得手动将json字符串转化为json对象jQuery.parseJSON()如果手动调用了CommonResult类的包装方法则没有这个问题因为接口方法的返回值是非String类型默认是json
2. 统一异常处理
RestControllerAdvice
public class ExceptionAdvice {ExceptionHandler(Exception.class)public Object exceptionAdvice(Exception e) {return CommonResult.fail(-1, e.getMessage());}
}3. 拦截器实现
3.1 全局变量SESSION_KEY 3.2 session工具类SessionUtils
通过这个工具类我们可以调用一个方法去获取当前登录用户
public class SessionUtils {/*** 得到当前登录用户* param request* return*/public static UserInfo getUser(HttpServletRequest request) {HttpSession session request.getSession(false);return session null ? null : (UserInfo) session.getAttribute(ApplicationVariable.SESSION_KEY);}
}3.3 拦截器 UserInterceptor
Component
public class UserInterceptor implements HandlerInterceptor {Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {System.out.println(执行了拦截器);//业务逻辑if (SessionUtils.getUser(request) ! null) {return true;//用户登录}response.sendRedirect(blog_login.html);return false;}
}3.4 配置类 AppConfig
Configuration//不是Configurable
public class AppConfig implements WebMvcConfigurer {Autowiredprivate UserInterceptor userInterceptor;Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(userInterceptor).addPathPatterns(/**).excludePathPatterns(/blog_login.html).excludePathPatterns(blog_detail.html).excludePathPatterns(blog_register.html).excludePathPatterns(blog_lists.html).excludePathPatterns(/css/**).excludePathPatterns(/editor.md).excludePathPatterns(/img/**).excludePathPatterns(/js/**).excludePathPatterns(/sql/**);}
}随着功能的实现根据业务逻辑判断其是否要进行排除目前仅仅将一些静态资源排除~ 文章到此结束谢谢观看 可以叫我 小马我可能写的不好或者有错误但是一起加油鸭 代码myblog_system · 游离态/马拉圈2023年9月 - 码云 - 开源中国 (gitee.com)
