1、总览
2、代码
1）、pom.xml
这里注意：springboot 2.2.0以后默认的freemarker文件后缀为：ftlh。本例用的是2.2.1，所以后缀为ftlh
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-freemarker</artifactId> </dependency> </dependencies>
2）、application.properties
#必须关闭whitelabel，否则无法导航到错误ftlh页面上
server.error.whitelabel.enabled=false
server.error.include-stacktrace=always
3）、java代码，与https://www.cnblogs.com/yaoyuan2/p/11873110.html一致
4）、5xx.ftlh
<!DOCTYPE html> <html lang="en"> <head> <style> table td{ vertical-align:top; border:solid 1px #888; padding:10px; } </style> </head> <body> <h1>My FreeMarker 5xx Error Page</h1> <table> <tr> <td>Date</td> <td>${timestamp?datetime}</td> </tr> <tr> <td>Error</td> <td>${error}</td> </tr> <tr> <td>Status</td> <td>${status}</td> </tr> <tr> <td>Message</td> <td>${message}</td> </tr> <tr> <td>Exception</td> <td>${exception!""}</td> </tr> <tr> <td>Trace</td> <td> <pre>${trace}</pre> </td> </tr> </table> </body> </html>
注意：在freemarker中${exception}是空的，导致出错，进而执行不到前模板页面了。因此，此处加上了!""，表示为空或找不到时为""。
5）、404.ftlh
<!DOCTYPE html> <html lang="en"> <head> <style> table td{ vertical-align:top; border:solid 1px #888; padding:10px; } </style> </head> <body> <h1>My FreeMarker 404 Error Page</h1> <table> <tr> <td>Date</td> <td>${timestamp?datetime}</td> </tr> <tr> <td>Error</td> <td>${error}</td> </tr> <tr> <td>Status</td> <td>${status}</td> </tr> <tr> <td>Message</td> <td>${message}</td> </tr> <tr> <td>Exception</td> <td>${exception!"No exception thrown"}</td> </tr> <tr> <td>Trace</td> <td> <pre>${trace!"No Stacktrace available"}</pre> </td> </tr> </table> </body> </html>
6）、error.ftlh
<!DOCTYPE html> <html lang="en"> <head> <style> table td{ vertical-align:top; border:solid 1px #888; padding:10px; } </style> </head> <body> <h1>My FreeMarker Custom Global Error Page</h1> <table> <tr> <td>Date</td> <td>${timestamp?datetime}</td> </tr> <tr> <td>Error</td> <td>${error}</td> </tr> <tr> <td>Status</td> <td>${status}</td> </tr> <tr> <td>Message</td> <td>${message}</td> </tr> <tr> <td>Exception</td> <td>${exception!"No exception"}</td> </tr> <tr> <td>Trace</td> <td> <pre>${trace!"No trace"}</pre> </td> </tr> </table> </body> </html>
3、执行
总结：
1、目录结构为：
templates
|_error.ftlh
|_error
|_5xx.ftlh
|_404.ftlh
2、application.properties中，必须加入：
server.error.whitelabel.enabled=false
如果想显示trace，也要加入：
server.error.include-stacktrace=always