1 異常處理
1.1 靜態頁面
- Controller
@RestController
public class HelloController {
@GetMapping("/hello")
public String hello() {
int i = 1 / 0;
return "hello";
}
}
1.2 動態頁面
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
1.3 異常源碼分析
2 自定義異常數據
2.1 默認數據
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>templates-5xx</h1>
<table border="1">
<tr>
<td>path</td>
<td th:text="${path}"></td>
</tr>
<tr>
<td>timestamp</td>
<td th:text="${timestamp}"></td>
</tr>
<tr>
<td>message</td>
<td th:text="${messages}"></td>
</tr>
<tr>
<td>error</td>
<td th:text="${error}"></td>
</tr>
<tr>
<td>status</td>
<td th:text="${status}"></td>
</tr>
</table>
</body>
</html>
- Controller
@RestController
public class HelloController {
@GetMapping("/hello")
public String hello() {
int i = 1 / 0;
return "hello";
}
}
2.2 自定義異常數據
package com.tzb.exception;
import org.springframework.boot.web.servlet.error.DefaultErrorAttributes;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.WebRequest;
import java.util.Map;
@Component
public class MyErrorAttr extends DefaultErrorAttributes {
@Override
public Map<String, Object> getErrorAttributes(WebRequest webRequest, boolean includeStackTrace) {
Map<String, Object> map = super.getErrorAttributes(webRequest, includeStackTrace);
map.put("myerror", "自定義的異常信息");
return map;
}
}
3 自定義異常視圖
@Component
public class MyErrorViewResolver extends DefaultErrorViewResolver {
/**
* Create a new {@link DefaultErrorViewResolver} instance.
*
* @param applicationContext the source application context
* @param resourceProperties resource properties
*/
public MyErrorViewResolver(ApplicationContext applicationContext, ResourceProperties resourceProperties) {
super(applicationContext, resourceProperties);
}
/**
* 這裏的 model 包含了默認的數據
* @param request
* @param status
* @param model
* @return
*/
@Override
public ModelAndView resolveErrorView(HttpServletRequest request, HttpStatus status, Map<String, Object> model) {
ModelAndView mv = new ModelAndView();
mv.setViewName("myerror");
mv.addAllObjects(model);
return mv;
}
}
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>templates-myerror-5xx</h1>
<table border="1">
<tr>
<td>path</td>
<td th:text="${path}"></td>
</tr>
<tr>
<td>timestamp</td>
<td th:text="${timestamp}"></td>
</tr>
<tr>
<td>message</td>
<td th:text="${messages}"></td>
</tr>
<tr>
<td>error</td>
<td th:text="${error}"></td>
</tr>
<tr>
<td>status</td>
<td th:text="${status}"></td>
</tr>
<tr>
<td>myerror</td>
<td th:text="${myerror}"></td>
</tr>
</table>
</body>
</html>
