标签 java 下的文章

int n = 10
String repeat = ".".repeat(n);
System.out.println(repeat);
// ..........

返回一个字符串，其 repeat() 括号中的值为该字符串重复指定次数后的拼接结果。若原字符串为空或重复次数为零，则返回空字符串。

会有异常：IllegalArgumentException – 若重复次数为负数

Caused by: org.xml.sax.SAXParseException: 元素内容必须由格式正确的字符数据或标记组成。
    at java.xml/com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:204) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:178) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:400) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1465) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.startOfMarkup(XMLDocumentFragmentScannerImpl.java:2589) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2679) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:605) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:542) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:889) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:825) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:247) ~[na:na]
    at java.xml/com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:342) ~[na:na]
    at org.apache.ibatis.parsing.XPathParser.createDocument(XPathParser.java:260) ~[mybatis-3.5.17.jar:3.5.17]
    ... 76 common frames omitted

请检查你的 XML 文件（如 MyBatis 的 mapper 文件、Spring 配置等），修正非法字符或结构

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