Java 如何将异常写入日志文件。。。？

我已经使用了SpringMVC

在DispatcherServlet加载之后，我得到了异常。我需要将该异常写入日志文件

我发现了一个错误。。。到主机192.168.100.178端口1433的TCP/IP连接失败。错误：连接超时。验证连接属性。确保SQL Server实例正在主机上运行，并在端口接受TCP/IP连接。确保到端口的TCP连接未被防火墙阻止

我无法写入日志文件

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有人能帮忙吗？谢谢

您可以创建自己的自定义异常，一旦捕获所有TCP/IP连接异常，就会抛出该异常。一旦抛出自定义异常，您只需将日志写入指定的文件。

您可以使用Log4j

是遵循Log4j 2配置的好教程：

<?xml version="1.0" encoding="UTF-8"?>

<!-- No need to set system property "Log4jContextSelector" to any value
when using <asyncLogger> or <asyncRoot>. -->

<Configuration status="WARN">
    <Appenders>
    <!-- Async Loggers will auto-flush in batches, so switch off immediateFlush. -->
        <RandomAccessFile name="RandomAccessFile" fileName="asyncWithLocation.log"
            immediateFlush="false" append="false">
            <PatternLayout>
                <Pattern>%d %p %class{1.} [%t] %location %m %ex%n</Pattern>
            </PatternLayout>
        </RandomAccessFile>
    </Appenders>
    <Loggers>
    <!-- pattern layout actually uses location, so we need to include it -->
        <AsyncLogger name="com.foo.Bar" level="trace" includeLocation="true">
            <AppenderRef ref="RandomAccessFile"/>
        </AsyncLogger>
        <Root level="info" includeLocation="true">
            <AppenderRef ref="RandomAccessFile"/>
        </Root>
    </Loggers>
</Configuration>

Logger logger = LogManager.getLogger(Your_Class_Name.class);
try {
    // do something
} catch (Exception e) {
    StringWriter stack = new StringWriter();
    e.printStackTrace(new PrintWriter(stack));
    logger.fatal(stack.toString());
};