jeecms搜索结果排序-二次开发

jeecms搜索用的是apache Lucene，要实现此功能得先去学习它。

直接上代码

package com.jeecms.cms.lucene;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.FieldCache;
import org.apache.lucene.search.FieldComparator;
import org.apache.lucene.search.FieldComparatorSource;

public class LuceneContentComparatorSource extends FieldComparatorSource {

private int lmId = 0;
public LuceneContentComparatorSource() {
}
public LuceneContentComparatorSource(int lmId) {
this.lmId = lmId;
}
@Override
public FieldComparator newComparator(String field, int allCounts, int newCount,
boolean reversed) throws IOException {
return new LuceneContentComparatorSource.LuceneContentFieldComparator(allCounts, field);
}
class LuceneContentFieldComparator extends FieldComparator{
private String[] values;
private String[] currentReaderValues;
private final String field;
private String bottom;
SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
public LuceneContentFieldComparator(int numHits, String field) {
this.values = new String[numHits];
this.field = field;
}
@Override
public int compare(int slot1, int slot2) {
try {
if("releaseDate".equals(field)){
Date val1 = format.parse(this.values[slot1]);
Date val2 = format.parse(this.values[slot2]);
if(null == val1) {
if(null == val2) {
return 0;
}
return -1;
}
if(null == val2) {
return 1;
}

if(val1.after(val2)) {
return 1;
}
if(val2.after(val1)) {
return -1;
}
}else if("channelIdArray".equals(field)){
if(this.values[slot1].equals(this.values[slot2])){
return 0;
}else if((lmId + "").equals(this.values[slot1])){
return 1;
}else if((lmId + "").equals(this.values[slot2])){
return -1;
}
}
} catch (Exception e) {
e.printStackTrace();
}
return 0;
}
@Override
public int compareBottom(int doc) throws IOException {
try {
if("releaseDate".equals(field)){
Date val2 = format.parse(this.currentReaderValues[doc]);
Date tempBottom = format.parse(this.bottom);
if (tempBottom == null) {
if (val2 == null) {
return 0;
}
return -1;
}
if (val2 == null) {
return 1;
}
if(val2.after(tempBottom)) {
return 1;
}
if(tempBottom.after(val2)) {
return -1;
}
}else if("channelIdArray".equals(field)){
if(this.bottom.equals(this.currentReaderValues[doc])){
return 0;
}else if((lmId + "").equals(this.bottom)){
return 1;
}else if((lmId + "").equals(this.currentReaderValues[doc])){
return -1;
}
}
} catch(Exception e) {
e.printStackTrace();
}
return 0;
}
@Override
public void copy(int slot, int doc) throws IOException {
this.values[slot] = this.currentReaderValues[doc];

}
@Override
public void setBottom(int bottom) {
this.bottom = this.values[bottom];
}
@Override
public void setNextReader(IndexReader reader, int arg1)
throws IOException {
this.currentReaderValues = FieldCache.DEFAULT.getStrings(reader, this.field);
}
@Override
public Comparable value(int slot) {
return this.values[slot];
}

}

}

我的需求是需呀根据栏目ID 与日期排序 所以以上代码就如此写的

至此 基本已经完成，之后只需要在 search方法中 传入 sort对象即可

//栏目排序类
SortField sortFieldLm = new SortField("channelIdArray", new LuceneContentComparatorSource(lmId), true);
//日期排序
SortField sortFieldDate = new SortField("releaseDate", new LuceneContentComparatorSource(), true);
Sort sort = new Sort ();
sort.setSort(sortFieldLm,sortFieldDate);
//排序类
TopDocs docs = searcher.search(query,null, pageNo * pageSize,sort);