109 lines
3.7 KiB
Java
109 lines
3.7 KiB
Java
package com.engine.salary.util.page;
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import org.apache.commons.collections4.CollectionUtils;
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import java.awt.*;
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import java.awt.font.FontRenderContext;
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import java.awt.geom.Rectangle2D;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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public class SalaryPageUtil {
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public static <T> PageInfo<T> buildPage(Integer pageNo, Integer pageSize) {
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pageNo = pageNo == null || pageNo <= 0 ? 1 : pageNo;
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pageSize = pageSize == null || pageSize <= 0 ? 10 : pageSize;
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PageInfo<T> pageInfo = new PageInfo<>();
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pageInfo.setPageNum(pageNo);
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pageInfo.setPageSize(pageSize);
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pageInfo.setList(new ArrayList<>());
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return pageInfo;
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}
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public static <T> PageInfo<T> buildPage(Integer pageNo, Integer pageSize, Class<T> clazz) {
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pageNo = pageNo == null || pageNo <= 0 ? 1 : pageNo;
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pageSize = pageSize == null || pageSize <= 0 ? 10 : pageSize;
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PageInfo<T> pageInfo = new PageInfo<>(clazz);
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pageInfo.setPageNum(pageNo);
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pageInfo.setPageSize(pageSize);
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pageInfo.setList(new ArrayList<>());
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return pageInfo;
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}
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public static <T> PageInfo<T> buildPage(Integer pageNo, Integer pageSize, List<T> totalCollection) {
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PageInfo<T> pageInfo = new PageInfo<>();
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pageInfo.setTotal(totalCollection.size());
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totalCollection = subList(pageNo, pageSize, totalCollection);
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pageInfo.setPageNum(pageNo);
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pageInfo.setPageSize(pageSize);
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pageInfo.setList(totalCollection);
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return pageInfo;
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}
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/**
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* 内存分页
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*
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* @param pageNo
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* @param pageSize
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* @param source
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* @param clazz
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* @param <T>
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* @return
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*/
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public static <T> PageInfo<T> buildPage(Integer pageNo, Integer pageSize, List<T> source, Class<T> clazz) {
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pageNo = pageNo == null || pageNo <= 0 ? 1 : pageNo;
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pageSize = pageSize == null || pageSize <= 0 ? 10 : pageSize;
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PageInfo<T> pageInfo = new PageInfo<>(clazz);
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pageInfo.setPageNum(pageNo);
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pageInfo.setPageSize(pageSize);
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pageInfo.setTotal(source == null ? 0 : source.size());
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pageInfo.setList(subList(pageNo, pageSize, source));
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return pageInfo;
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}
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/**
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* 分页
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*
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* @param pageNo 页码（从1开始）
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* @param pageSize 每页条数
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* @param source 待分页的数据
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* @param <T> 范型制定类
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* @return
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*/
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public static <T> List<T> subList(Integer pageNo, Integer pageSize, List<T> source) {
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if (CollectionUtils.isEmpty(source)) {
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return Collections.emptyList();
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}
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pageNo = pageNo == null || pageNo <= 0 ? 1 : pageNo;
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pageSize = pageSize == null || pageSize <= 0 ? 10 : pageSize;
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int endIndex = pageNo * pageSize;
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int startIndex = (pageNo - 1) * pageSize;
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startIndex = startIndex < 0 ? 0 : startIndex;
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return source.subList(startIndex > source.size() ? source.size() : startIndex,
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endIndex > source.size() ? source.size() : endIndex);
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}
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static Font font = new Font("Arial", Font.PLAIN, 12); // 设置字体样式、大小等属性
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static FontRenderContext frc = new FontRenderContext(null, true, false);
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// GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
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/**
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* 自适应文字长度
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* @param chars
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* @param width
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* @return
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*/
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public static String selfAdaption(String chars, Integer width) {
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if (width != null && width != 0) {
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return width + "";
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}
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Rectangle2D bounds = font.getStringBounds(chars, frc);
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int pxLength = (int) Math.ceil(bounds.getWidth());
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return pxLength + 55 + "";
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}
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}
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