背景：

采用Rest-assured，日志采用log4j，发现Rest-assured本身只支持打印日志到控制台，但期望打印到文件中以便排查问题

请求打印的语句只能输出到控制台

given().log().all()

（Rest-assured的官方文档：https://github.com/rest-assured/rest-assured）

解决方法：

1.翻阅资料，可以通过RestAssured.config来改变日志方面的配置，因此尝试从这里入手

RestAssured.config = RestAssured.config().logConfig(new LogConfig());

2.发现一种解决方法，PrintStream支持字符串路径/File对象/outputstream，可以通过新建file来可以将日志输出到file中，但这种不能append，只能保存最新的一次记录，而且没有log4j格式

PrintStream ps = new PrintStream(new File("test.txt")); RestAssured.config = config().logConfig(new LogConfig(ps));

3.继续google，发现了通过重写方法来解决该问题（http://stackoverflow.com/questions/14476112/how-to-get-rest-assured-log-into-something-printable-in-a-text-file），需要新建一个类来将logger转为outputstream

ToLoggerPrintStream loggerPrintStream = new ToLoggerPrintStream(logger); RestAssured.config = RestAssured.config().logConfig(new LogConfig(loggerPrintStream.getPrintStream(), true));

ToLoggerPrintStream类源码：

折叠原码

import java.io.IOException; import java.io.OutputStream; import java.io.PrintStream; import java.io.UnsupportedEncodingException; import org.apache.commons.io.output.ByteArrayOutputStream; import org.apache.commons.lang.StringUtils; import org.apache.logging.log4j.Logger; /** * A wrapper class which takes a logger as constructor argument and offers a * PrintStream whose flush method writes the written content to the supplied * logger (debug level). * * Usage: * initializing in @BeforeClass of the unit test: * * <pre> * ToLoggerPrintStream loggerPrintStream = new ToLoggerPrintStream(myLog); * RestAssured.config = RestAssured.config().logConfig(new LogConfig(loggerPrintStream.getPrintStream(), true)); * </pre> * * will redirect all log outputs of a ValidatableResponse to the supplied * logger: * * <pre> * resp.then().log().all(true); * </pre> * * @author Heri Bender * @version 1.0 (28.10.2015) */ public class ToLoggerPrintStream { /** * Logger for this class */ private Logger myLog; private PrintStream myPrintStream; /** * @return printStream * @throws UnsupportedEncodingException */ public PrintStream getPrintStream() { if (myPrintStream == null) { OutputStream output = new OutputStream() { ByteArrayOutputStream baos = new ByteArrayOutputStream(); @Override public void write(int b) throws IOException { baos.write(b); } /** * @see java.io.OutputStream#flush() */ @Override public void flush() { String log = this.baos.toString().trim(); if (!StringUtils.isBlank(log)) { myLog.info(log); baos = new ByteArrayOutputStream(); } } }; // true: autoflush // must be set! myPrintStream = new PrintStream(output, true); } return myPrintStream; } /** * Constructor * * @param logger */ public ToLoggerPrintStream(Logger logger) { super(); myLog = logger; } }

Rest-assured 写日志到 log4j

背景：

解决方法：