katalon写一个Groovy脚本，利用java-diff-util库来实现两个文件夹的自动比较，并利用ReportGenerator将比较结果生成HTML。当文件在两个文件夹中都存在，但内容不一致，则将差异数据的行数及内容出力到html中,将具体哪个字段有差异高亮显示出来；当文件只在一个文件夹中存在，将信息输出到html中。要求能识别隔行数据，按文件名生成结果html，html里显示两个文件夹的差异内容

好的，这是一个比较复杂的需求，需要使用到多个工具和库。首先，需要在Katalon Studio中创建一个Groovy脚本，并导入以下依赖库：

@Grab(group='com.github.difflib', module='difflib', version='1.3.0')
@Grab(group='com.relevantcodes', module='extentreports', version='2.41.2')

其中，`difflib`是Java-Diff-Utils库，用于比较两个文件的差异；`extentreports`是一个报告生成工具，用于生成HTML报告。

接下来，可以按以下步骤编写Groovy脚本：

1. 定义两个文件夹的路径，例如：

def folder1Path = "path/to/folder1"
def folder2Path = "path/to/folder2"

2. 定义生成HTML报告的路径，例如：

def reportPath = "path/to/report.html"

3. 遍历两个文件夹，比较文件差异，并将结果保存到一个列表中，例如：

import difflib.DiffUtils
import difflib.Patch

def diffList = []

def folder1 = new File(folder1Path)
def folder2 = new File(folder2Path)

folder2.eachFileRecurse { file2 ->
    def file1 = new File(folder1Path + "/" + file2.name)
    if (file1.exists()) {
        def lines1 = file1.readLines()
        def lines2 = file2.readLines()
        def patch = DiffUtils.diff(lines1, lines2)
        if (patch.getDeltas().size() > 0) {
            def diff = [:]
            diff.put("filename", file2.name)
            diff.put("lines", [])
            patch.getDeltas().each { delta ->
                def range1 = delta.getOriginal()
                def range2 = delta.getRevised()
                def lines = [:]
                lines.put("range1", "${range1.getAnchor()}-${range1.getCount()}")
                lines.put("range2", "${range2.getAnchor()}-${range2.getCount()}")
                lines.put("content1", range1.getLines().join("\n"))
                lines.put("content2", range2.getLines().join("\n"))
                diff.lines.add(lines)
            }
            diffList.add(diff)
        }
    } else {
        def diff = [:]
        diff.put("filename", file2.name)
        diff.put("lines", [])
        file2.eachLine { line ->
            def lines = [:]
            lines.put("range1", "")
            lines.put("range2", file2.getLineNumber())
            lines.put("content1", "")
            lines.put("content2", line)
            diff.lines.add(lines)
        }
        diffList.add(diff)
    }
}

def folder1Files = folder1.listFiles()
folder1Files.each { file1 ->
    def file2 = new File(folder2Path + "/" + file1.name)
    if (!file2.exists()) {
        def diff = [:]
        diff.put("filename", file1.name)
        diff.put("lines", [])
        file1.eachLine { line ->
            def lines = [:]
            lines.put("range1", file1.getLineNumber())
            lines.put("range2", "")
            lines.put("content1", line)
            lines.put("content2", "")
            diff.lines.add(lines)
        }
        diffList.add(diff)
    }
}

4. 使用ReportGenerator生成HTML报告，例如：

import com.relevantcodes.extentreports.ExtentReports
import com.relevantcodes.extentreports.LogStatus

def report = new ExtentReports(reportPath)

diffList.each { diff ->
    def testName = diff.filename
    def test = report.startTest(testName)
    diff.lines.each { line ->
        def content1 = line.content1.replaceAll("\r\n", "\n")
        def content2 = line.content2.replaceAll("\r\n", "\n")
        def patch = DiffUtils.diff(content1.tokenize('\n'), content2.tokenize('\n'))
        if (patch.getDeltas().size() > 0) {
            def html = ""
            patch.getDeltas().each { delta ->
                def range1 = delta.getOriginal()
                def range2 = delta.getRevised()
                html += range1.getLines().join("\n") + "<br>"
                html += "<span style='background-color: #FFFF00;'>${range2.getLines().join("\n")}</span><br>"
            }
            test.log(LogStatus.WARNING, "Lines ${line.range1} and ${line.range2} differ:", html)
        }
    }
    report.endTest(test)
}

report.flush()
report.close()

这样，就可以将比较结果生成为HTML报告，其中差异部分会高亮显示。同时，报告中会按文件名分别显示两个文件夹中文件的差异内容。