5.mvn

解觖java技术中后台无法上传数给的情况

  }

//执行修改操作
  public ActionForward modifyRecord(ActionMapping actionMapping,
                                    ActionForm actionForm,
                                    HttpServletRequest httpServletRequest,
                                    HttpServletResponse httpServletResponse) {
    BookForm bookForm = (BookForm) actionForm;
    if (Operator.modifyRecord(bookForm.loadBook()) != -1) {
      return this.getOperatorOkForward(actionMapping);
    }
    else {
      this.saveGlobalErrors(httpServletRequest, "editrecord.jsp.modifyerror");
      return this.getErrorForward(actionMapping);
    }
  }


//跳转到添加记录编辑页面
  public ActionForward showAdd(ActionMapping actionMapping,
                               ActionForm actionForm,
                               HttpServletRequest httpServletRequest,
                               HttpServletResponse httpServletResponse) {
    httpServletRequest.getSession().setAttribute("bookBean", new BookForm());
    httpServletRequest.getSession().setAttribute("method",
                                                 new String("addRecord"));
    return this.getShowAddForward(actionMapping);
  }

//跳转到修改记录编辑页面
  public ActionForward showModify(ActionMapping actionMapping,
                                  ActionForm actionForm,
                                  HttpServletRequest httpServletRequest,
                                  HttpServletResponse httpServletResponse) {
    BookBean book = new BookBean();
    String str = httpServletRequest.getParameter("bookid").toString();
    book = Operator.getRecord(str);
    httpServletRequest.getSession().setAttribute("bookBean",
                                                 new BookForm(book.getBookId(),
        book.getBookName(), book.getAuthor(), book.getPublish(), book.getPrice()));
    httpServletRequest.getSession().setAttribute("method",
                                                 new String("modifyRecord"));

    return this.getShowModifyForward(actionMapping);
  }

//删除记录
  public ActionForward showDelete(ActionMapping actionMapping,
                                  ActionForm actionForm,
                                  HttpServletRequest httpServletRequest,
                                  HttpServletResponse httpServletResponse) {
    String str = httpServletRequest.getParameter("bookid").toString();
    if (Operator.deleteRecord(str) != -1) {
      return this.getOperatorOkForward(actionMapping);
    }
    else {
      this.saveGlobalErrors(httpServletRequest, "edit.body.error");
      return this.getErrorForward(actionMapping);
    }
  }

  public ActionForward showFind(ActionMapping actionMapping,
                                ActionForm actionForm,
                                HttpServletRequest httpServletRequest,
                                HttpServletResponse httpServletResponse) {
    //传递参数
    httpServletRequest.getSession().setAttribute("bookBean", new BookForm());
    httpServletRequest.getSession().setAttribute("method",
                                                 new String("findRecord"));
    return this.getShowFindForward(actionMapping);
  }
}
以下是三个ActionForm文件：
package com.bookshop.form;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionMapping;
import javax.servlet.http.HttpServletRequest;
import java.util.Map;
import java.util.HashMap;

public class BookForm
    extends ActionForm {
  private String author;
  private String bookId;
  private String bookName;
  private String price;
  private String publish;
  private String beanId;

  public BookForm() {
    this.bookId = "";
    this.bookName = "";
    this.author = "";
    this.publish = "";
    this.price = "";
    this.beanId = "";
  }

  public BookForm(String id, String name, String author, String publish,
                  String price) {
    this.bookId = id;
    this.bookName = name;
    this.author = author;
    this.publish = publish;
    this.price = price;
    this.beanId = id;
  }

  public String getAuthor() {
    return author;
  }

  public void setAuthor(String author) {
    this.author = author;
  }

  public void setPublish(String publish) {
    this.publish = publish;
  }

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

  public void setBookName(String bookName) {
    this.bookName = bookName;
  }

  public void setBookId(String bookId) {
    this.bookId = bookId;
  }

  public String getBookId() {
    return bookId;
  }

  public String getBookName() {
    return bookName;
  }

  public String getPrice() {
    return price;
  }

  public String getPublish() {
    return publish;
  }

  public String getBeanId() {
    return this.beanId;
  }

  public void setBeanId(String beanId) {
    this.beanId = beanId;
  }

  public Map loadBook() {
    Map record = new HashMap();
    record.put("column1", this.getBookId().trim());
    record.put("column2", this.getBookName().trim());
    record.put("column3", this.getAuthor().trim());
    record.put("column4", this.getPublish().trim());
    record.put("column5", this.getPrice().trim());
    return record;
  }

  public ActionErrors validate(ActionMapping actionMapping,
                               HttpServletRequest httpServletRequest) {
    ActionErrors errors = new ActionErrors();
    if (this.bookId == null || this.bookId.equals("") ||
        this.bookId.length() < 1) {
      errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("book.bookid.error"));
    }
    if (this.bookName == null || this.bookName.equals("") ||
        this.bookName.length() < 1) {
      errors.add(ActionErrors.GLOBAL_ERROR,
                 new ActionError("book.bookname.error"));
    }
    if (this.author == null || this.author.equals("") ||
        this.author.length() < 1) {
      errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("book.author.error"));
    }
    if (this.publish == null || this.publish.equals("") ||
        this.publish.length() < 1) {
      errors.add(ActionErrors.GLOBAL_ERROR,
                 new ActionError("book.publish.error"));
    }
    // if ( (Float.isNaN(this.price)) && (this.price < 0)) {
    if ( (Float.isNaN(Float.parseFloat(this.price))) &&
        (Float.parseFloat(this.price) < 0)) {
      errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("book.price.error"));
    }
    return errors;
  }
}
/**/
package com.bookshop.form;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionMapping;
import javax.servlet.http.HttpServletRequest;

public class FindRecordForm
    extends ActionForm {
  private String findByKey;
  private String findByValue;
  public String getFindByKey() {
    return findByKey;
  }

  public void setFindByKey(String findByKey) {
    this.findByKey = findByKey;
  }

  public void setFindByValue(String findByValue) {
    this.findByValue = findByValue;
  }

  public String getFindByValue() {
    return findByValue;
  }

  public ActionErrors validate(ActionMapping actionMapping,
                               HttpServletRequest httpServletRequest) {
    /** @todo: finish this method, this is just the skeleton.*/
    ActionErrors errors = null;
    if (this.findByKey.equals("") || this.findByValue.equals("")) {
      errors = new ActionErrors();
      errors.add(ActionErrors.GLOBAL_ERROR,
                 new ActionError("find.jsp.error"));
    }
    return errors;
  }

  public void reset(ActionMapping actionMapping,
                    HttpServletRequest servletRequest) {
  }
}
/**/
package com.bookshop.form;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMapping;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionError;

public class OperatorForm
    extends ActionForm {
  private String operator;
  public String getOperator() {
    return operator;
  }

  public void setOperator(String operator) {
    this.operator = operator;
  }

  public ActionErrors validate(ActionMapping actionMapping,
                               HttpServletRequest httpServletRequest) {
    ActionErrors errors = new ActionErrors();
    if (httpServletRequest.getParameter("operator") != null) {
      String lang = httpServletRequest.getParameter("operator");
      /* if ( (lang.length() < 6) || (lang.length() > 6)) {
         errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("index.jsp.operator.error"));
       }
       */
    }
    else {
      errors.add(ActionErrors.GLOBAL_ERROR,
                 new ActionError("index.jsp.operator.null"));
    }
    return errors;

  }

  public void reset(ActionMapping actionMapping,
                    HttpServletRequest servletRequest) {
  }
}
以下是业务类和数据库访问类：
package com.bookshop.model;

import java.util.Map;
import java.util.List;
import com.bookshop.util.*;

public class Operator {

  private static int recordPerPage = ApplicationUtil.recordPerPage;
  //动态SQL
  private static String sqlNumber = "";

  //留出接口设置每页显示多少条记录
  public static void setRecordPerPage(int number) {
    recordPerPage = number;
  }

  public Operator() {
  }

  //获得所有记录集(只查询一页记录)
  public static List getRecords(int startIndex) {
    String sql = "select * from booktab limit ?,?";
    sqlNumber = "select count(*) from booktab";
    return DBUtil.executeQuery(sql, startIndex, recordPerPage);
  }

  //按条件查找记录集(只查询一页记录)
  public static List getRecords(String key, String value, int startIndex) {

    String sql = "select * from booktab where " + key + "='" + value +
        "' limit ?,?";
    sqlNumber = "select count(*) from booktab where " + key + "='" + value +
        "'";
    return DBUtil.executeQuery(sql, startIndex, recordPerPage);
  }

  //查询单条记录 用于修改
  public static BookBean getRecord(String value) {
    String sql = "select * from booktab where bookid='" + value + "'";
    BookBean book = new BookBean();
    book = DBUtil.execQuery(sql);
    return book;
  }

  //添加一条新记录
  public static int addRecord(Map newRecord) {
    String sql =
        "insert into booktab(bookname,author,publish,price,bookid)values(?,?,?,?,?)";
    return DBUtil.execUpdate(sql, newRecord);
  }

  //修改指定的记录
  public static int modifyRecord(Map newRecord) {
    String sql =
        "update booktab set bookname=?,author=?,publish=?,price=? where bookid=?";
    return DBUtil.execUpdate(sql, newRecord);
  }

  //删除指定的记录
  public static int deleteRecord(String value) {
    String sql =
        "delete from booktab where bookid='" + value + "'";
    return DBUtil.execUpdate(sql);
  }

  //获得表中所有记录的条数
  public static int getRecordsNumber() {
 &nbsp;  return DBUtil.executeQuery(sqlNumber);
  }

  /*
    public static void main(String[] args) {
      Operator operator = new Operator();
    }
   */
}
/**/
package com.bookshop.util;

import javax.servlet.http.HttpServletRequest;

public class ApplicationUtil {
  public ApplicationUtil() {
  }

  public static final String driver = "org.gjt.mm.mysql.Driver";
  public static final String url ="jdbc:mysql://localhost/bookshop";
  public static final String user = "root";
  public static final String password = "";
  public static final int recordPerPage = 5;

  public static String toGBK(String s) {
    try {
      return new String(s.getBytes("ISO-8859-1"), "gb2312");
    }
    catch (Exception ex) {
      return "";
    }
  }

  public static String getSelfURL(HttpServletRequest req) {
    String s1 = req.getRequestURI();
    String s2 = req.getQueryString();
    if (s2 != null) {
      s1 = s1 + "?" + s2;
    }
    return s1;
  }

  public static void setParam(String param, String value, java.util.HashMap map) {
    String[] p = param.split(";");
    String[] v = value.split(";");
    for (int i = 0; i < p.length; i++) {
      map.put(p[i], v[i]);
    }
  }

}
/**/
package com.bookshop.util;

import javax.servlet.jsp.tagext.*;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;

public class IsLastTag
    extends TagSupport {
  private String page = "";

  public IsLastTag() {
  }

  public void setPage(String page) {
    this.page = page;
  }

  public String getPage() {
    return this.page;
  }