Use LAYUI+SPRINGBOOT+SOLR imitate Baidu search engine

Preface

Full-text search in SQL Fuzzy query, the biggest difference lies in
① the former can be a key string to query the first flexible participle, and then to match ,
② the latter will only be directly rigid matching .
③ Many sites have site search, each backstage should be, so did a demo share

There are a lot of advantages, I believe we have learned the summary of the separation of the front and back

① Front End frame: jQuery, Layui

② background frame: Springboot, SOLR

Imitate Baidu search , though small, spite

Many of the basics of this article are from the author's previous articles
①SOLR Foundation: [Additions and deletions] springboot integrate SOLR solrclient implement CRUD, paging interface, highlighting
② cross-Domain Problem resolution: setting allow Cross-domain requests in springboot
③layui Foundation: Use new, hot, lightweight, simple, powerful, graceful layui frame to build the front page effect gif graphic READ:

① Search Java Crawler Technology
② Search Springboot Consolidated SOLR
③ Click on a link to search results

thinking:

If you do not use the SOLR Full-text search, the search term Java learning, because of the first letter in uppercase, followed by Chinese, can not match the Java Crawler. Front-end code

<! DOCTYPE html>  
 Background   
Package Com.cun.controller;
Import java.io.IOException;
Import Java.text.SimpleDateFormat;
Import Java.util.Date;
Import Java.util.HashMap;
Import java.util.List;

Import Java.util.Map;
Import org.apache.solr.client.solrj.SolrClient;
Import Org.apache.solr.client.solrj.SolrQuery;
Import org.apache.solr.client.solrj.SolrServerException;
Import Org.apache.solr.client.solrj.response.QueryResponse;
Import org.apache.solr.common.SolrDocumentList;
Import org.apache.solr.common.SolrInputDocument;
Import org.springframework.beans.factory.annotation.Autowired;
Import org.springframework.web.bind.annotation.DeleteMapping;
Import org.springframework.web.bind.annotation.GetMapping;
Import org.springframework.web.bind.annotation.PathVariable;
Import org.springframework.web.bind.annotation.PostMapping;
Import org.springframework.web.bind.annotation.RequestMapping;

Import Org.springframework.web.bind.annotation.RestController;

Import Springfox.documentation.swagger2.annotations.EnableSwagger2; /**
 * Optimization: Extract Id, text for a JavaBean * @author linhongcun * */@RestController @RequestMapping ("/test") @EnableSwagger2 Publi

    C class Solrcontroller {@Autowired private solrclient client;
    /** * 1, add * @param message * @return * @throws IOException * @throws solrserverexception * *
        @PostMapping ("/insert") Public String Insert (string title, String href) throws IOException, Solrserverexception {
        SimpleDateFormat SDF = new SimpleDateFormat ("Yyyymmddhhmmss");
        String datestring = Sdf.format (New Date ());
            try {solrinputdocument doc = new solrinputdocument ();
            Doc.setfield ("id", datestring);
            Doc.setfield ("title", title);
            Doc.setfield ("href", href); * * If the spring.data.solr.host inside the core, then there is no need to pass Collection1 This parameter is the same as the * CLIENT.COMMIT (
             );
            * * Client.add ("Itaem", Doc);
     Client.commit ("Itaem");       return datestring;
        catch (Exception e) {e.printstacktrace ();
    return "error"; /** * 4, delete all * @return/@DeleteMapping ("DeleteAll") public String DeleteAll () {T
            ry {client.deletebyquery ("Itaem", "*:*");
            Client.commit ("Itaem");
        Return "Success";
        catch (Exception e) {e.printstacktrace ();
    return "error"; /** * 7, check + +: keywords, highlighting, paging ✔* @return * @return * @throws solrserverexception * @throws IO Exception */@GetMapping ("/select/{q}/{page}/{size}") Public map<string, object> Select (@PathVariable S
        Tring q, @PathVariable integer page, @PathVariable integer size) throws Solrserverexception, IOException {

        Solrquery params = new Solrquery ();

        Query conditions Params.set ("q", q); Sort, the actual should be based on the score, but it doesn't matter, all the records found are relevant and irrelevant to the exclusion of params.addsorT ("id", SOLRQUERY.ORDER.DESC);
        Paging Params.setstart (page);

        Params.setrows (size);

        Default Domain Params.set ("df", "title");

        Query only the specified domain Params.set ("fl", "href");
        Open the Highlight params.sethighlight (true);
        Set prefix params.sethighlightsimplepre ("<span style= ' color:red ' >");

        Set suffix params.sethighlightsimplepost ("</span>");
        The SOLR database is Itaem queryresponse queryresponse = client.query ("Itaem", params);
        Solrdocumentlist results = Queryresponse.getresults (); Number, paging with long total = Results.getnumfound ();/JS uses SIZE=MXA and data.length to know the length (but not reasonable)//get the highlighted result, Highlighted results and query results are divided into open map<string, map<string, list<string>>> highlight = Queryresponse.gethighlighti
        Ng ();
        map<string, object> map = new hashmap<string, object> ();
        Map.put ("Total", total);
        Map.put ("href", results); Map.put ("Highlight", highlight);

    return map; }

}