如何逐行比较两个文件，然后逐字比较。此外，我们需要突出显示输出中不匹配的单词。我需要用Java编写这个并创建一个HTML文件。
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package base;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
public class DataCompareMain {
public static void main(String[] args) throws IOException {
/**
* List of regex given by user to ignore the comparison
*/
List<String> regexList = new ArrayList<String>();
regexList.add("\\d+");
/**
* File 1 data
*/
List<String> string1Lines = new ArrayList<String>();
string1Lines.add("This is 555 line 1 from F1");
string1Lines.add("This is common line");
string1Lines.add("This is first line in left");
/**
* File 2 data
*/
List<String> string2Lines = new ArrayList<String>();
string2Lines.add("This is fsd 666 line 1 from F2");
string2Lines.add("This fds is common line");
string2Lines.add("This is second line in right");
Map<Integer, DataMismatch> mismatch = compareText(string1Lines, string2Lines, regexList);
System.out.println("*********OUTPUT************");
System.out.println("Below lines are mismatched");
for (Entry<Integer, DataMismatch> mimatchedEntry : mismatch.entrySet()) {
DataMismatch data = mimatchedEntry.getValue();
String f1Line = data.getFile1Text();
String f2Line = data.getFile2Text();
int lineNumber = (mimatchedEntry.getKey() + 1);
System.out.println("Difference found at line number " + lineNumber + " left side text = "
+ "\"" + f1Line + "\" and right side text = \"" + f2Line + "\"");
for (Entry<Integer, DataMismatch> mimatchedWords : data.getMismatchedWords().entrySet()) {
DataMismatch wdata = mimatchedWords.getValue();
String w1 = wdata.getFile1Text();
String w2 = wdata.getFile2Text();
System.out.println("At line number "+lineNumber+", Difference of words found at index " + (mimatchedWords.getKey()) + " left side word = "
+ "\"" + w1 + "\" and right side word = \"" + w2 + "\"");
}
System.out.println("\n");
}
String div1 = print(string1Lines, mismatch, true);
String div2 = print(string2Lines, mismatch, false);
String html = createHTML(div1, div2);
createFile(html);
}
private static void createFile(String html) throws IOException {
File f = new File("sample.html");
BufferedWriter bw = new BufferedWriter(new FileWriter(f));
bw.write(html);
bw.close();
}
private static String createHTML(String div1, String div2) {
String html = "<html>" +
"<body>" +
"<table border='1'>" +
"<tr>" +
"<th>Existing</th>" +
"<th>New</th>" +
"</tr>" +
"<tr>" +
"<td>" +
div1 +
"</td>" +
"<td>" +
div2 +
"</td>" +
"</tr>" +
"</table>" +
"" +
"</body>" +
"</html>";
return html;
}
private static String print(List<String> string2Lines, Map<Integer, DataMismatch> mismatch, boolean isExisting) {
StringBuilder sb = new StringBuilder();
for(int i=0; i<string2Lines.size();i++) {
if (mismatch.containsKey(i)) {
DataMismatch data = mismatch.get(i);
String f1Line = data.getFile1Text();
String f2Line = data.getFile2Text();
sb.append("<div>");
String[] f1Words = f1Line.split(" ");
String[] f2Words = f2Line.split(" ");
int f1WordSize = f1Words.length;
int f2WordSize = f2Words.length;
int wordLoopLimit = f1WordSize > f2WordSize ? f2WordSize : f1WordSize;
for (int j = 0; j < wordLoopLimit; j++) {
String word = null;
if (isExisting) {
word = f1Words[j];
} else {
word = f2Words[j];
}
if (data.getMismatchedWords().containsKey(j)) {
sb.append("<span style='background: yellow'>").append(word).append("</span>");
} else {
sb.append(word);
}
sb.append(" ");
}
sb.append("</div>");
} else {
sb.append("<div>").append(string2Lines.get(i)).append("</div>");
}
}
return sb.toString();
}
/**
* Method to compare two text containing multiple lines
*
* @param string1Lines
* @param string2Lines
* @param regexList
* @return
*/
public static Map<Integer, DataMismatch> compareText(List<String> string1Lines, List<String> string2Lines,
List<String> regexList) {
/**
* List of excluded lines that are different but ignored
*/
List<DataMismatch> excludedData = new ArrayList<DataMismatch>();
/**
* Map to store mismatched lines with index/line number
*/
Map<Integer, DataMismatch> mismatchdata = new HashMap<>();
/**
* Calculate number of lines
*/
int string1Size = string1Lines.size();
int string2Size = string2Lines.size();
int loopLimit = string1Size > string2Size ? string2Size : string1Size;
/**
* Iterate all lines and find mismatched ones and store in map
*/
for (int i = 0; i < loopLimit; i++) {
String f1Line = string1Lines.get(i);
String f2Line = string2Lines.get(i);
if (!f1Line.equals(f2Line)) {
boolean isEligibleExclude = checkLinesWithRegex(f1Line, f2Line, regexList);
if (isEligibleExclude) {
excludedData.add(new DataMismatch(f1Line, f2Line));
} else {
mismatchdata.put(i, new DataMismatch(f1Line, f2Line));
}
}
}
/**
* Iterate through map and check each entry with regex list, if the mismatched
* lines are matching with regex then it can be ignored
*/
for (Entry<Integer, DataMismatch> mimatchedEntry : mismatchdata.entrySet()) {
DataMismatch data = mimatchedEntry.getValue();
String f1Line = data.getFile1Text();
String f2Line = data.getFile2Text();
String[] f1Words = f1Line.split(" ");
String[] f2Words = f2Line.split(" ");
int f1WordSize = f1Words.length;
int f2WordSize = f2Words.length;
int wordLoopLimit = f1WordSize > f2WordSize ? f2WordSize : f1WordSize;
for (int i = 0; i < wordLoopLimit; i++) {
String f1Word = f1Words[i];
String f2Word = f2Words[i];
if (!f1Word.equals(f2Word)) {
boolean isEligibleExclude = checkLinesWithRegex(f1Word, f2Word, regexList);
if (!isEligibleExclude) {
data.getMismatchedWords().put(i, new DataMismatch(f1Word, f2Word));
}
}
}
}
/**
* Print the output
*/
System.out.println("Excluded from comparsion data (Matched with regex): " + excludedData);
System.out.println("Mismatched data: " + mismatchdata);
return mismatchdata;
}
/**
* Method to check if the lines match with any of the given input regex list
*
* @param f1Line
* @param f2Line
* @param regexList
* @return
*/
private static boolean checkLinesWithRegex(String f1Line, String f2Line, List<String> regexList) {
for (String regex : regexList) {
if (f1Line.matches(regex) || f2Line.matches(regex)) {
return true;
}
}
return false;
}
}
And below class:
package base;
import java.util.HashMap;
import java.util.Map;
public class DataMismatch {
private String file1Text;
private String file2Text;
private final Map<Integer, DataMismatch> mismatchedWords;
public DataMismatch(String file1Text, String file2Text) {
super();
mismatchedWords = new HashMap<>();
this.file1Text = file1Text;
this.file2Text = file2Text;
}
public String getFile1Text() {
return file1Text;
}
public void setFile1Text(String file1Text) {
this.file1Text = file1Text;
}
public String getFile2Text() {
return file2Text;
}
public void setFile2Text(String file2Text) {
this.file2Text = file2Text;
}
public Map<Integer, DataMismatch> getMismatchedWords() {
return mismatchedWords;
}
@Override
public String toString() {
return "DataMismatch [file1Text=" + file1Text + ", file2Text=" + file2Text + "]";
}
}
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