Merge pull request #1649 from jacobslei/master

fixed: handler 可能为非HandlerMethod 类型，出现类型转换异常

xxl-job-admin/src/main/java/com/xxl/job/admin/controller/resolver/WebExceptionResolver.java

-package com.xxl.job.admin.controller.resolver;
-
-import com.xxl.job.admin.core.exception.XxlJobException;
-import com.xxl.job.core.biz.model.ReturnT;
-import com.xxl.job.admin.core.util.JacksonUtil;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.stereotype.Component;
-import org.springframework.web.bind.annotation.ResponseBody;
-import org.springframework.web.method.HandlerMethod;
-import org.springframework.web.servlet.HandlerExceptionResolver;
-import org.springframework.web.servlet.ModelAndView;
-
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-
-/**
- * common exception resolver
- *
- * @author xuxueli 2016-1-6 19:22:18
- */
-@Component
-public class WebExceptionResolver implements HandlerExceptionResolver {
-	private static transient Logger logger = LoggerFactory.getLogger(WebExceptionResolver.class);
-
-	@Override
-	public ModelAndView resolveException(HttpServletRequest request,
-			HttpServletResponse response, Object handler, Exception ex) {
-
-		if (!(ex instanceof XxlJobException)) {
-			logger.error("WebExceptionResolver:{}", ex);
-		}
-
-		// if json
-		boolean isJson = false;
-		HandlerMethod method = (HandlerMethod)handler;
-		ResponseBody responseBody = method.getMethodAnnotation(ResponseBody.class);
-		if (responseBody != null) {
-			isJson = true;
-		}
-
-		// error result
-		ReturnT<String> errorResult = new ReturnT<String>(ReturnT.FAIL_CODE, ex.toString().replaceAll("\n", "<br/>"));
-
-		// response
-		ModelAndView mv = new ModelAndView();
-		if (isJson) {
-			try {
-				response.setContentType("application/json;charset=utf-8");
-				response.getWriter().print(JacksonUtil.writeValueAsString(errorResult));
-			} catch (IOException e) {
-				logger.error(e.getMessage(), e);
-			}
-			return mv;
-		} else {
-
-			mv.addObject("exceptionMsg", errorResult.getMsg());
-			mv.setViewName("/common/common.exception");
-			return mv;
-		}
-	}
-	
+package com.xxl.job.admin.controller.resolver;
+
+import com.xxl.job.admin.core.exception.XxlJobException;
+import com.xxl.job.core.biz.model.ReturnT;
+import com.xxl.job.admin.core.util.JacksonUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.method.HandlerMethod;
+import org.springframework.web.servlet.HandlerExceptionResolver;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+/**
+ * common exception resolver
+ *
+ * @author xuxueli 2016-1-6 19:22:18
+ */
+@Component
+public class WebExceptionResolver implements HandlerExceptionResolver {
+	private static transient Logger logger = LoggerFactory.getLogger(WebExceptionResolver.class);
+
+	@Override
+	public ModelAndView resolveException(HttpServletRequest request,
+			HttpServletResponse response, Object handler, Exception ex) {
+
+		if (!(ex instanceof XxlJobException)) {
+			logger.error("WebExceptionResolver:{}", ex);
+		}
+
+		// if json
+		boolean isJson = false;
+		if (handler instanceof HandlerMethod) {
+			HandlerMethod method = (HandlerMethod)handler;
+			ResponseBody responseBody = method.getMethodAnnotation(ResponseBody.class);
+			if (responseBody != null) {
+				isJson = true;
+			}
+		}
+
+		// error result
+		ReturnT<String> errorResult = new ReturnT<String>(ReturnT.FAIL_CODE, ex.toString().replaceAll("\n", "<br/>"));
+
+		// response
+		ModelAndView mv = new ModelAndView();
+		if (isJson) {
+			try {
+				response.setContentType("application/json;charset=utf-8");
+				response.getWriter().print(JacksonUtil.writeValueAsString(errorResult));
+			} catch (IOException e) {
+				logger.error(e.getMessage(), e);
+			}
+			return mv;
+		} else {
+
+			mv.addObject("exceptionMsg", errorResult.getMsg());
+			mv.setViewName("/common/common.exception");
+			return mv;
+		}
+	}
+	
 }
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