자바/스프링/2020-06-01/ 페이지네이션 Pager.java

package com.lambda.web.proxy;
 
import com.lambda.web.mappers.MovieMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
 
@Component
public class Pager {
    @Autowired MovieMapper movieMapper;
    private int rowCount, pageCount, blockCount,
                rowStart, pageStart, prevBlock,
                rowEnd, pageEnd, nextBlock,
                        pageSize, blockSize,
                        pageNow, blockNow;
    public void paging(){
        rowCount = 50;
        rowStart = pageNow * pageSize; // 0
        rowEnd = rowStart + (pageSize-1); // 4
        pageCount = rowCount / pageSize ; // 10
        pageStart = blockNow *  blockSize; // 0
        pageEnd = pageStart + (blockSize - 1); // 4
        pageSize = 5;
        pageNow = 0;
        blockCount = pageCount / blockSize ; // 2
        prevBlock = pageStart - blockSize; // 0
        nextBlock = pageStart + blockSize; // 1
        blockSize = 5;
        blockNow = pageNow / blockSize; // 0
    }
}
 

 

package com.lambda.web.proxy;
 
import com.lambda.web.mappers.MovieMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
 
@Component
public class Pager {
    @Autowired MovieMapper movieMapper;
    private int rowCount, pageCount, blockCount,
                rowStart, pageStart, prevBlock,
                rowEnd, pageEnd, nextBlock,
                        pageSize, blockSize,
                        pageNow, blockNow;
    public void paging(){
        rowCount = 52;
        rowStart = pageNow * pageSize; // 0
        rowEnd = () ? :rowStart + (pageSize-1); // 4
        pageCount = () ? :rowCount / pageSize ; // 10
        pageStart = blockNow *  blockSize; // 0
        pageEnd = () ? :pageStart + (blockSize - 1); // 4
        pageSize = 5;
        pageNow = 0;
        blockCount = () ? :pageCount / blockSize ; // 2
        prevBlock = pageStart - blockSize; // 0
        nextBlock = pageStart + blockSize; // 1
        blockSize = 5;
        blockNow = pageNow / blockSize; // 0
    }
}
 

 

package com.lambda.web.proxy;
 
import com.lambda.web.mappers.MovieMapper;
import lombok.Data;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
@Data
@Component
public class Pager {
    @Autowired MovieMapper movieMapper;
    private int rowCount, pageCount, blockCount,
                rowStart, pageStart, prevBlock,
                rowEnd, pageEnd, nextBlock,
                        pageSize, blockSize,
                        pageNow, blockNow;
    public void paging(){
        rowCount = movieMapper.count();
        rowStart = pageNow * pageSize;
        rowEnd = (pageNow != (pageCount -1)) ? rowStart + (pageSize-1): rowCount - 1;
        pageCount = (rowCount % pageSize != 0) ? rowCount / pageSize +1 :rowCount / pageSize ;
        pageStart = blockNow *  blockSize;
        pageEnd = (blockNow != (blockCount -1)) ? pageStart + (blockSize - 1): pageCount - 1;
        // pageSize = 5;
        // pageNow = 0;
        blockCount = (pageCount % blockSize != 0) ? pageCount / blockSize +1:pageCount / blockSize ;
        prevBlock = pageStart - blockSize;
        nextBlock = pageStart + blockSize;
        // blockSize = 5;
        blockNow = pageNow / blockSize;
    }
}