花了点时间，实现JAVA 字符串(String)的模糊查找；
目的：实现用户输入关键字，查找含有该关键字的字符串，如：
输入: I love Java
返回: My name is GG, i love IT, java is good!! (该字段含有 "i" "love" "java" 的字段(不区分大小写)，所以能检索到)
注意: 1.关键字输入检索时有顺序要求，如输入"java love i", 如果没有包含该顺序关键字的字符串，是检索不到的；
2. 输入有重复关键字时，检索也会按重复关键字去检索，如输入"kaili kaili", 返回也必须有 "xxxkailixxx xxxkailixxx"类似的字符串，否则检索不到；
直接上代码（说明：下面代码基于idea-springboot，刚从C转Java，风格还保留C风格，大家看看就行, 如有问题，欢迎指正!）：
package com.example.mystring;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;
@SpringBootApplication
public class MyStringApplication {
public static void main(String[] args) throws IOException {
SpringApplication.run(MyStringApplication.class, args);
String userStr;
while (true)
{
userStr = getData();
func01(userStr);
}
}
public static String getData() throws IOException {
String userStr;
System.out.print("Please input: ");
BufferedReader str = new BufferedReader(new InputStreamReader(System.in));
userStr = str.readLine();
return userStr;
}
public static void func01(String str) {
List<String> resList = new ArrayList<>();
String sourceStr[] = {
"rty ryry I enter a wer with wer fgffrom the java Console.",
"Hgow kaili I enter a strkailing with Spaertces wer the java wer.",
"Hoghw dyuyo I enter a strwerewing with dfg from the java dfg.",
"gh yu I 2323432 a kailikaili with dfg rty the java dfg.",
"gh jghy I werwer a strwerweing with dfg hj the java dfg.",
"gh do I werwe java kaili with Spaces from the java Console.",
"My name is GG, i love IT, java is good!!"
};
String[] strArray = str.toLowerCase().split("\\s+"); //str.toLowerCase() 先转小写, "\\s+" 是按空格分割。
for (int i =0; i< strArray.length; i++) {
System.out.println("proStr["+i+"]: " + strArray[i]);
}
/* 字符数组拼接
StringJoiner joiner = new StringJoiner("-");
for (String s : splited) {
joiner.add(s);
}
System.out.println("pro: "+ joiner.toString());
*/
int count = 0;
boolean isFind = false;
for (int i = 0; i < sourceStr.length; i++) {
boolean isOneFind = true;
int indexTemp = 0;
int len = 0;
for (int j = 0; j < strArray.length; j++) {
//这一步很关键！！ sourceStr也要转小写，如果找到了，下一个关键字要从(当前位置+刚找到的关键字的长度)处开始查找
int index = sourceStr[i].toLowerCase().indexOf(strArray[j], indexTemp+len);
if (index < 0) {
isOneFind = false;
}
else
{
len = strArray[j].length();
indexTemp = index;
}
}
if (isOneFind) {
resList.add(sourceStr[i]);
isFind = true;
count++;
}
}
if (isFind)
{
//System.out.println("Is find, num = "+num +":\n" + Arrays.toString(resList.toArray()));
System.out.println("Is find, count = "+count +":\n" + resList);
}
else
{
System.out.println("Not find!!");
}
}
}
验证：
/*****测试1*****/
Please input: kaili kaili
proStr[0]: kaili
proStr[1]: kaili
Is find, count = 2:
[Hgow kaili I enter a strkailing with Spaertces wer the java wer., gh yu I 2323432 a kailikaili with dfg rty the java dfg.]
/*****测试2*****/
Please input: kaili
proStr[0]: kaili
Is find, count = 3:
[Hgow kaili I enter a strkailing with Spaertces wer the java wer., gh yu I 2323432 a kailikaili with dfg rty the java dfg., gh do I werwe java kaili with Spaces from the java Console.]
/*****测试3*****/
Please input: i love java
proStr[0]: i
proStr[1]: love
proStr[2]: java
Is find, count = 1:
[My name is GG, i love IT, java is good!!]
/*****测试4*****/
Please input: java love i
proStr[0]: java
proStr[1]: lova
proStr[2]: i
Not find!!