strutsCRUD

Bookdao

public class BookDao extends JsonBaseDao{

    //分页查询书本信息
    //根据书本id查询当个书本信息
    public  List<Map<String, Object>> queryBook(Map<String, String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
        //String sql="SELECT * FROM t_book";
       String sql="select * from t_mvc_book where true";
        String bname=JsonUtils.getParamVal(paMap, "bname");
        if(StringUtils.isNotBlank(bname)) {
            sql+=" and bname like '%"+bname+"%'";
        }
        return super.executeQuery(sql, pageBean);

      }

    //新增书本信息
      public int addBook (Map<String, String[]> paMap,PageBean pageBean) throws Exception, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException{
       String sql="insert into t_mvc_book(bname,price) values(?,?)";
       return super.executeUpdate(sql, new String[] {"bname","price"}, paMap);
 }

    //修改书本信息
      public int editBook (Map<String, String[]> paMap,PageBean pageBean) throws Exception, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException{
          String sql="update t_mvc_book set bname=?,price=? where bid=?";
          return super.executeUpdate(sql, new String[] {"bname","price","bid"}, paMap);
    }

    //新增书本信息
      public   int delBook (Map<String, String[]>paMap,PageBean pageBean) throws Exception, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException{
          String sql="delete from t_mvc_book where bid=?";
          return super.executeUpdate(sql, new String[] {"bid"}, paMap);
    }

      public List<Map<String, Object>>  book(Map<String, String[]>paMap,PageBean pageBean) throws Exception, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException{

          String bid=JsonUtils.getParamVal(paMap, "bid");
          if(StringUtils.isNotBlank(bid)) {
              String sql="select * from t_mvc_book where bid="+bid;
              return executeQuery(sql, pageBean);
          }
          else {
              return null;
          }
       }

}

BookAction

public class BookAction extends BaseAction{
   private BookDao bookDao=new BookDao();
   private  PageBean pageBean;
   private String type;

    public String getType() {
    return type;
}

public void setType(String type) {
    this.type = type;
}

    //新增书本
    public String addBook() throws Exception, Exception {
        bookDao.addBook(request.getParameterMap(), null);
        return "success";

    }

    //修改书本
    public String editBook() throws Exception, Exception {
        bookDao.editBook(request.getParameterMap(), null);
        return "success";

    }

    //删除书本
    public String delBook() throws Exception, Exception {
        bookDao.delBook(request.getParameterMap(), null);
        return "success";

    }

    //查询当个
    public String book() throws Exception, Exception {
        List<Map<String, Object>> book =bookDao.queryBook(request.getParameterMap(), null);
         Map<String, Object> map = book.get(0);
        request.setAttribute("book", map);
        if("edit".equals(type)) {
            return "edit";
        }
        else {
            return "detail";
        }

    }

    public String queryBook() throws Exception, Exception {
        pageBean=new PageBean();
        pageBean.setRequest(request);
        List<Map<String, Object>> queryBook = bookDao.queryBook(request.getParameterMap(), pageBean);

        Map<String, Object> result=new HashMap<>();
        result.put("queryBook",queryBook);
        result.put("pageBean", pageBean);
        request.setAttribute("result", result);
        return "list";

    }
}

BaseAction

public abstract class  BaseAction implements ServletResponseAware,ServletRequestAware{

    protected HttpServletResponse response;
    protected HttpServletRequest request;
    protected HttpSession session;
    protected ServletContext application;

    @Override
    public void setServletRequest(HttpServletRequest request) {
        // TODO Auto-generated method stub
        this.request=request;
        this.session=request.getSession();
        this.application= request.getServletContext();
    }

    @Override
    public void setServletResponse(HttpServletResponse response) {
        // TODO Auto-generated method stub
        this.response=response;
    }
}

book实体

public class Book implements Serializable{
   private Integer bid;
   private String bname;
   private Float price;

public Integer getBid() {
    return bid;
}

public void setBid(Integer bid) {
    this.bid = bid;
}

public String getBname() {
    return bname;
}

public void setBname(String bname) {
    this.bname = bname;
}

public Float getPrice() {
    return price;
}

public void setPrice(Float price) {
    this.price = price;
}

@Override
public String toString() {
    return "Book [bid=" + bid + ", bname=" + bname + ", price=" + price + "]";
}

}

分页助手类

public class PageTag extends  BodyTagSupport {

    private PageBean bean;

    public PageBean getBean() {
        return bean;
    }

    public void setBean(PageBean bean) {
        this.bean = bean;
    }

    @Override
    public int doStartTag() throws JspException {
     JspWriter out= pageContext.getOut();
      try {
        out.print(tohtml());
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
      return  super.doStartTag();
    }

    private String tohtml() {
        StringBuilder sb=new StringBuilder();
        //拼接下一次发送请求所要提交的隐藏的form表单
       sb.append("<form id='pageBeanForm' action='"+bean.getUrl()+"' method='post'>");
       sb.append(" <input type='hidden' name='page'>");

       Map<String, String[]> paMap = bean.getParameterMap();
       if(paMap!=null&&paMap.size()>0) {
           Set<Entry<String, String[]>> entrySet = paMap.entrySet();
       for (Entry<String, String[]> entry : entrySet) {
       //上一次请求可能携带页面name=page的参数，但是改参数在前面已经单独赋值
    //为什么要单独赋值呢？因为上一次请求是第一页的数据，下一次可能是第二页，因为这前后请求page对应的值是不一样的，要单独赋值
           if(!"page".equals(entry.getKey())) {
            for(String val:entry.getValue()) {
                sb.append("<input type='hidden' name='"+entry.getKey()+"' value='"+val+"'>");
            }
        }
    }
       }
       sb.append(" </form>");

        //拼接分页条
       sb.append("<div style='text-align: right; font-size: 12px;'>");
       sb.append(" 每页"+bean.getRows()+"条，共"+bean.getTotal()+"条，第"+bean.getPage()+"页，共"+bean.getMaxPage()+"页&nbsp;&nbsp;<a href='javascript:gotoPage(1)'>首页");
       sb.append(" </a>&nbsp;&nbsp;<a");
       sb.append(" href='javascript:gotoPage("+bean.previousPage()+")'>上一页</a>&nbsp;&nbsp;<a");
       sb.append(" href='javascript:gotoPage("+bean.nextPage() +")'>下一页</a>&nbsp;&nbsp;<a");
       sb.append(" href='javascript:gotoPage("+bean.getMaxPage()+")'>尾页</a>&nbsp;&nbsp;<input type='text'");

       sb.append(" id='skipPage'");
       sb.append(" style='text-align: center; font-size: 12px; width: 50px;'>&nbsp;&nbsp;<a");
       sb.append(" href='javascript:skipPage()'>Go</a>");
       sb.append(" </div>");
       //拼接所需要的js代码
       sb.append(" <script type='text/javascript'>");
       sb.append(" function gotoPage(page) {");
       sb.append("   document.getElementById('pageBeanForm').page.value = page;");
       sb.append("    document.getElementById('pageBeanForm').submit();");
       sb.append(" }");
       sb.append(" function skipPage() {");
       sb.append("   var page = document.getElementById('skipPage').value;");
       sb.append("   if(!page || isNaN(page) || parseInt(page)<1 || parseInt(page)>"+bean.getMaxPage()+"){");
       sb.append("    alert('请输入1~N的数字');");
       sb.append("    return;");
       sb.append(" }");
       sb.append("   gotoPage(page);");
       sb.append("}");
       sb.append("</script>");
       return sb.toString();

    }
}

struts-book.xml

<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
    "http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
  <package name="struts-book" extends="struts-base">
  <action name="bookAction_*"
  class="com.hmc.struts2_03.action.BookAction"  method="{1}">

   <result name="success" type="redirect">
    /bookAction_queryBook.action
   </result>

   <result name="list" type="dispatcher">
   /bookList.jsp
   </result>

   <result name="edit" >
   /bookEdit.jsp
   </result>

   <result name="detail" >
   /bookDetail.jsp
   </result>

   </action>
  </package>

</struts>

创建jsp页面进行测试

新增

结果

修改

修改圣墟为斗神

结果

删除斗神

模糊查询（不死不灭）