complete fix exception

Xiaxinyuuu · Dec 12, 2021 · e2be5db · e2be5db
1 parent 35d3249
commit e2be5db
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Showing 11 changed files with 768 additions and 578 deletions.
diff --git a/.DS_Store b/.DS_Store
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
diff --git a/log/MyBlog-dev.log b/log/MyBlog-dev.log
diff --git a/src/main/java/com/xiaxinyu/myblog/NotFoundException.java b/src/main/java/com/xiaxinyu/myblog/NotFoundException.java
@@ -0,0 +1,18 @@
+package com.xiaxinyu.myblog;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.NOT_FOUND)//将该异常作为资源找不到的状态供Springboot识别后判断是否返回404页面
+public class NotFoundException extends RuntimeException{
+    public NotFoundException() {
+    }
+
+    public NotFoundException(String message) {
+        super(message);
+    }
+
+    public NotFoundException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}
diff --git a/src/main/java/com/xiaxinyu/myblog/hander/ControllerExceptionHandler.java b/src/main/java/com/xiaxinyu/myblog/hander/ControllerExceptionHandler.java
@@ -0,0 +1,38 @@
+package com.xiaxinyu.myblog.hander;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.core.annotation.AnnotationUtils;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.servlet.http.HttpServletRequest;
+import java.lang.annotation.Annotation;
+
+
+@ControllerAdvice
+public class ControllerExceptionHandler {
+
+    private final Logger logger = (Logger) LoggerFactory.getLogger(this.getClass());
+
+    @ExceptionHandler(Exception.class)
+    //ModelAndView返回值为视图
+    public ModelAndView exceptionHandler(HttpServletRequest request, Exception e) throws Exception{
+
+        //判断是否存在状态标识，如果不存在则抛出异常
+        if(AnnotationUtils.findAnnotation(e.getClass(), ResponseStatus.class) != null){
+            throw e;
+        }
+
+        logger.error("Request URL : {}, Exception : {}", request.getRequestURI(),e);
+        //在控制台打印错误堆栈信息
+        ModelAndView mv = new ModelAndView();
+        mv.addObject("url",request.getRequestURI());
+        mv.addObject("exception",e);
+        //将异常url和异常类型传递给视图，可在error.html的源代码中以注释的形式显示异常信息
+        mv.setViewName("error/error");
+        return mv;
+    }
+}
diff --git a/src/main/java/com/xiaxinyu/myblog/indexController.java b/src/main/java/com/xiaxinyu/myblog/indexController.java
@@ -7,7 +7,11 @@
 public class indexController {
     @GetMapping("/")
     public String index(){
-        int a = 9 / 0;
+        String blog = null;
+        if(blog == null)
+        {
+            throw new NotFoundException("博客不存在");
+        }
         return "index";
     }
 }
diff --git a/src/main/resources/templates/error/error.html b/src/main/resources/templates/error/error.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
+<head>
+    <meta charset="UTF-8">
+    <title>错误</title>
+</head>
+<body>
+    <h1>错误</h1>
+    <div>
+        <div th:utext="'&lt;!--' "th:remove="tag"></div>
+        <div th:utext="'Failed Request URL : ' + ${url}" th:remove="tag"></div>
+        <div th:utext="'Exception message : ' + ${exception.message}" th:remove="tag"></div>
+        <ul th:remove="tag">
+            <li th:each="st : ${exception.stackTrace}" th:remove="tag"><span th:utext="${st}" th:remove="tag"></span></li>
+        </ul>
+        <div th:utext="'--&gt;'" th:remove="tag"></div>
+    </div>
+</body>
+</html>
diff --git a/target/classes/com/xiaxinyu/myblog/NotFoundException.class b/target/classes/com/xiaxinyu/myblog/NotFoundException.class
diff --git a/target/classes/com/xiaxinyu/myblog/hander/ControllerExceptionHandler.class b/target/classes/com/xiaxinyu/myblog/hander/ControllerExceptionHandler.class
diff --git a/target/classes/com/xiaxinyu/myblog/indexController.class b/target/classes/com/xiaxinyu/myblog/indexController.class
diff --git a/target/classes/templates/error/error.html b/target/classes/templates/error/error.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
+<head>
+    <meta charset="UTF-8">
+    <title>错误</title>
+</head>
+<body>
+    <h1>错误</h1>
+    <div>
+        <div th:utext="'&lt;!--' "th:remove="tag"></div>
+        <div th:utext="'Failed Request URL : ' + ${url}" th:remove="tag"></div>
+        <div th:utext="'Exception message : ' + ${exception.message}" th:remove="tag"></div>
+        <ul th:remove="tag">
+            <li th:each="st : ${exception.stackTrace}" th:remove="tag"><span th:utext="${st}" th:remove="tag"></span></li>
+        </ul>
+        <div th:utext="'--&gt;'" th:remove="tag"></div>
+    </div>
+</body>
+</html>