springboot - mapping HTTP Response Status Codes to FreeMarker Error page

1, Overview

2, the code

1), pom.xml

Here Note: After springboot 2.2.0 freemarker default file suffix: ftlh. 2.2.1 is used in this case, the suffix 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>

View Code

2）、application.properties

# Must be closed whitelabel, otherwise you can not navigate to the page error ftlh
server.error.whitelabel.enabled=false
server.error.include-stacktrace=always

3), java code and https://www.cnblogs.com/yaoyuan2/p/11873110.html consistent

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>

Note: freemarker in $ {exception} is empty, result in an error, and then perform less than the front page template. So, here coupled with! "", Expressed as empty or not found "" .

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>

View Code

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>