Java解析搜狗输入法词库

解析算法摘自:http://qindongliang.iteye.com/blog/2088416

最近在优化社区搜索结果,之前使用的词库比较老旧很多次都收录不全,所以想到了搜狗输入法词库。但是搜索输入法词库文件是加密之后的,去网上找了一个Java版的解析程序,经测试可用,这里搜藏一下。

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package cn.mucang.saturn.common;

import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.file.Files;
import java.nio.file.LinkOption;
import java.nio.file.Paths;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

/**
* 解析sogou词库工具类
**/
public class SogouDictParser {

public static void main(String[] args) throws Exception {
sogou("/Users/gaoyoubo/Downloads/sougou.scel", "/Users/gaoyoubo/Downloads/sougou.txt", false);
}

/**
* 读取scel的词库文件
* 生成txt格式的文件
*
* @param inputPath 输入路径
* @param outputPath 输出路径
* @param isAppend 是否拼接追加词库内容
* true 代表追加,false代表重建
**/
private static void sogou(String inputPath, String outputPath, boolean isAppend) throws IOException {
File file = new File(inputPath);
if (!isAppend) {
if (Files.exists(Paths.get(outputPath), LinkOption.values())) {
System.out.println("存储此文件已经删除");
Files.deleteIfExists(Paths.get(outputPath));

}
}
try (RandomAccessFile raf = new RandomAccessFile(outputPath, "rw")) {
int count = 0;
SogouScelMdel model = new SogouScelReader().read(file);
Map<String, List<String>> words = model.getWordMap(); //词<拼音,词>
Set<Entry<String, List<String>>> set = words.entrySet();
Iterator<Entry<String, List<String>>> it = set.iterator();
while (it.hasNext()) {
Entry<String, List<String>> entry = it.next();
List<String> list = entry.getValue();
int size = list.size();
for (int i = 0; i < size; i++) {
String word = list.get(i);

System.out.println(word);

raf.seek(raf.getFilePointer());
raf.write((word + "\n").getBytes());//写入txt文件
count++;
}
}
System.out.println("生成txt成功!,总计写入: " + count + " 条数据!");
}
}

}


package cn.mucang.saturn.common;

import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

/**
* @author Gao Youbo
* @since 2017-03-07 19:26
*/
public class SogouScelReader {
protected static String encoding = "UTF-16LE";

public SogouScelMdel read(File file) throws IOException {
return read(new FileInputStream(file));
}

protected ByteArrayOutputStream output = new ByteArrayOutputStream();

protected String readString(DataInputStream input, int pos, int[] reads) throws IOException {
int read = reads[0];
input.skip(pos - read);
read = pos;
output.reset();
while (true) {
int c1 = input.read();
int c2 = input.read();
read += 2;
if (c1 == 0 && c2 == 0) {
break;
} else {
output.write(c1);
output.write(c2);
}
}
reads[0] = read;
return new String(output.toByteArray(), encoding);
}

public SogouScelMdel read(InputStream in) throws IOException {
SogouScelMdel model = new SogouScelMdel();
DataInputStream input = new DataInputStream(in);
int read;
try {
byte[] bytes = new byte[4];
input.readFully(bytes);
assert (bytes[0] == 0x40 && bytes[1] == 0x15 && bytes[2] == 0 && bytes[3] == 0);
input.readFully(bytes);
int flag1 = bytes[0];
assert (bytes[1] == 0x43 && bytes[2] == 0x53 && bytes[3] == 0x01);
int[] reads = new int[]{8};
model.setName(readString(input, 0x130, reads));
model.setType(readString(input, 0x338, reads));
model.setDescription(readString(input, 0x540, reads));
model.setSample(readString(input, 0xd40, reads));
read = reads[0];
input.skip(0x1540 - read);
read = 0x1540;
input.readFully(bytes);
read += 4;
assert (bytes[0] == (byte) 0x9D && bytes[1] == 0x01 && bytes[2] == 0 && bytes[3] == 0);
bytes = new byte[128];
Map<Integer, String> pyMap = new LinkedHashMap<Integer, String>();
while (true) {
int mark = readUnsignedShort(input);
int size = input.readUnsignedByte();
input.skip(1);
read += 4;
assert (size > 0 && (size % 2) == 0);
input.readFully(bytes, 0, size);
read += size;
String py = new String(bytes, 0, size, encoding);
//System.out.println(py);
pyMap.put(mark, py);
if ("zuo".equals(py)) {
break;
}
}
if (flag1 == 0x44) {
input.skip(0x2628 - read);
} else if (flag1 == 0x45) {
input.skip(0x26C4 - read);
} else {
throw new RuntimeException("出现意外,联系作者");
}
StringBuffer buffer = new StringBuffer();
Map<String, List<String>> wordMap = new LinkedHashMap<String, List<String>>();
while (true) {
int size = readUnsignedShort(input);
if (size < 0) {
break;
}
int count = readUnsignedShort(input);
int len = count / 2;
assert (len * 2 == count);
buffer.setLength(0);
for (int i = 0; i < len; i++) {
int key = readUnsignedShort(input);
buffer.append(pyMap.get(key)).append("'");
}
buffer.setLength(buffer.length() - 1);
String py = buffer.toString();
List<String> list = wordMap.get(py);
if (list == null) {
list = new ArrayList<String>();
wordMap.put(py, list);
}
for (int i = 0; i < size; i++) {
count = readUnsignedShort(input);
if (count > bytes.length) {
bytes = new byte[count];
}
input.readFully(bytes, 0, count);
String word = new String(bytes, 0, count, encoding);
//接下来12个字节可能是词频或者类似信息
input.skip(12);
list.add(word);
}
}
//System.out.println(wordMap.size());
model.setWordMap(wordMap);
return model;
} finally {
in.close();
}
}

protected final int readUnsignedShort(InputStream in) throws IOException {
int ch1 = in.read();
int ch2 = in.read();
if ((ch1 | ch2) < 0) {
return Integer.MIN_VALUE;
}
return (ch2 << 8) + (ch1 << 0);
}

}

package cn.mucang.saturn.common;

import java.util.List;
import java.util.Map;

/**
* @author Gao Youbo
* @since 2017-03-07 19:26
*/
public class SogouScelMdel {
private Map<String, List<String>> wordMap;

private String name;
private String type;
private String description;
private String sample;

public Map<String, List<String>> getWordMap() {
return wordMap;
}

void setWordMap(Map<String, List<String>> wordMap) {
this.wordMap = wordMap;
}

public String getType() {
return type;
}

public void setType(String type) {
this.type = type;
}

public String getDescription() {
return description;
}

public void setDescription(String description) {
this.description = description;
}

public String getSample() {
return sample;
}

public void setSample(String sample) {
this.sample = sample;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}
}