Mybatis系列（三）之分页查询及特殊字符的处理

<dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.1.2</version>
        </dependency>

<plugins>
        <!-- 配置分页插件PageHelper, 4.0.0以后的版本支持自动识别使用的数据库 -->
        <plugin interceptor="com.github.pagehelper.PageInterceptor">
        </plugin>
    </plugins>

package com.xissl.util;
import java.io.Serializable;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
public class PageBean implements Serializable {
  private static final long serialVersionUID = 2422581023658455731L;
  //页码
  private int page=1;
  //每页显示记录数
  private int rows=10;
  //总记录数
  private int total=0;
  //是否分页
  private boolean isPagination=true;
  //上一次的请求路径
  private String url;
  //获取所有的请求参数
  private Map<String,String[]> map;
  public PageBean() {
    super();
  }
  //设置请求参数
  public void setRequest(HttpServletRequest req) {
    String page=req.getParameter("page");
    String rows=req.getParameter("rows");
    String pagination=req.getParameter("pagination");
    this.setPage(page);
    this.setRows(rows);
    this.setPagination(pagination);
    this.url=req.getContextPath()+req.getServletPath();
    this.map=req.getParameterMap();
  }
  public String getUrl() {
    return url;
  }
  public void setUrl(String url) {
    this.url = url;
  }
  public Map<String, String[]> getMap() {
    return map;
  }
  public void setMap(Map<String, String[]> map) {
    this.map = map;
  }
  public int getPage() {
    return page;
  }
  public void setPage(int page) {
    this.page = page;
  }
  public void setPage(String page) {
    if(null!=page&&!"".equals(page.trim()))
      this.page = Integer.parseInt(page);
  }
  public int getRows() {
    return rows;
  }
  public void setRows(int rows) {
    this.rows = rows;
  }
  public void setRows(String rows) {
    if(null!=rows&&!"".equals(rows.trim()))
      this.rows = Integer.parseInt(rows);
  }
  public int getTotal() {
    return total;
  }
  public void setTotal(int total) {
    this.total = total;
  }
  public void setTotal(String total) {
    this.total = Integer.parseInt(total);
  }
  public boolean isPagination() {
    return isPagination;
  }
  public void setPagination(boolean isPagination) {
    this.isPagination = isPagination;
  }
  public void setPagination(String isPagination) {
    if(null!=isPagination&&!"".equals(isPagination.trim()))
      this.isPagination = Boolean.parseBoolean(isPagination);
  }
  /**
   * 获取分页起始标记位置
   * @return
   */
  public int getStartIndex() {
    //(当前页码-1)*显示记录数
    return (this.getPage()-1)*this.rows;
  }
  /**
   * 末页
   * @return
   */
  public int getMaxPage() {
    int totalpage=this.total/this.rows;
    if(this.total%this.rows!=0)
      totalpage++;
    return totalpage;
  }
  /**
   * 下一页
   * @return
   */
  public int getNextPage() {
    int nextPage=this.page+1;
    if(this.page>=this.getMaxPage())
      nextPage=this.getMaxPage();
    return nextPage;
  }
  /**
   * 上一页
   * @return
   */
  public int getPreivousPage() {
    int previousPage=this.page-1;
    if(previousPage<1)
      previousPage=1;
    return previousPage;
  }
  @Override
  public String toString() {
    return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", isPagination=" + isPagination
        + "]";
  }
}

<select id="selectLike04" resultType="com.xissl.model.Book" parameterType="java.util.List" >
    select
    <include refid="Base_Column_List" />
    from t_mvc_book
    where bname like concat('%',#{bname},'%')
  </select>

List<Book> selectLike04(@Param("bname") String bname);

List<Book> selectLike04(String bname, PageBean pageBean);

@Override
    public List<Book> selectLike04(String bname, PageBean pageBean) {
        if(pageBean !=null && pageBean.isPagination()){
            PageHelper.startPage(pageBean.getPage(),pageBean.getRows());
        }
        List<Book> books = bookMapper.selectLike04(bname);
        if(pageBean !=null && pageBean.isPagination()){
            PageInfo<Book> info = new PageInfo<>(books);
            System.out.println("页码：" + info.getPageNum());
            System.out.println("页大小：" + info.getPageSize());
            System.out.println("总记录：" + info.getTotal());
            pageBean.setTotal(info.getTotal()+"");
        }
        return books;
    }

<select id="query" resultType="com.xissl.model.Book" parameterType="com.xissl.dto.BookDto" >
    select
    <include refid="Base_Column_List" />
    from t_mvc_book
    where
    price &gt; #{min} and price &lt; #{max}
  </select>

<select id="query" resultType="com.xissl.model.Book" parameterType="com.xissl.dto.BookDto" >
    select
    <include refid="Base_Column_List" />
    from t_mvc_book
    where <![CDATA[
        price > #{min} and price < #{max}
    ]]>
  </select>