struts1.2一些知识

struts1.2包括相关文件：

struts-config.xml  接收action通过mapping传过来的forward，并通过对应的forward转向不同的页面

Action  处理程序  action可以继承Action，也可以继承DispatchAction

FormBean  用于把封装form表单中的数据

struts1.2工作流程

1，含输入页面，也就是form表单

首先访问form表单页，把form表单页提交到相应的action里，然后在action里通过对应FormBean把form强制转换然后用FormBean接收，

然后把formbean传到相应方法里，然后通过return mapping.findForward("");转到struts-config.xml里对应的forward，然后转向页面，

例如：

1，struts-config.xml文件如下：

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd"><struts-config>  <data-sources />  <form-beans >    <form-bean name="wordsForm" type="com.company.form.WordsForm" />  </form-beans>  <global-exceptions />  <global-forwards />  <action-mappings >     <action      attribute="wordsForm"      name="wordsForm"      path="/words"      scope="request"      parameter="method"      type="com.company.action.WordsAction">      <forward name="words" path="/form.jsp" />    </action>  </action-mappings>  <message-resources parameter="com.company.struts.ApplicationResources" /></struts-config>

在struts-config.xml文件里  一个action对应一个formBean

2，WordsForm.java文件如下：

package com.company.form;import java.util.Date;import org.apache.struts.action.ActionForm;public class WordsForm extends ActionForm  {private static final long serialVersionUID = -686042683660710968L;private Integer id;private String name;private String content;private Date postTime;private String email;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getContent() {return content;}public void setContent(String content) {this.content = content;}public Date getPostTime() {return postTime;}public void setPostTime(Date postTime) {this.postTime = postTime;}}

3,WordsDao.java接口类

public interface WordsDao {public void insertSave(WordsForm wordsForm);  //更新和插入}

4，WordsDaoImp.java对应的方法

public class WordsDaoImp extends DB implements WordsDao {

@Override

public void insertSave(WordsForm wordsForm) {String sql = "";if (wordsForm.getId() != null) {sql = "update words set name=?,content=?,postTime=?,email=? where id=?";this.update(sql,new Object[] { wordsForm.getName(),wordsForm.getContent(), new Date(),wordsForm.getId(),wordsForm.getEmail()});} else {sql = "insert into words(name,content,id,postTime,email) values(?,?,?,?,?)";this.insert(sql,new Object[] { wordsForm.getName(),wordsForm.getContent(), wordsForm.getId(),new Date(),wordsForm.getEmail() });}}

}

5，WordsAction.java类

package com.company.action;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionForward;import org.apache.struts.action.ActionMapping;import org.apache.struts.actions.DispatchAction;import com.company.dao.WordsDao;import com.company.dao.imp.WordsDaoImp;;import com.company.form.WordsForm;public class WordsAction extends DispatchAction {WordsDao wordsDao = new WordsDaoImp();//添加留言public ActionForward insertWord(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception {request.setCharacterEncoding("utf-8");WordsForm wordsForm = (WordsForm)form;  //用WordsForm强制转换form表单wordsDao.insertSave(wordsForm);    //把wordsForm添加到对应方法里return mapping.findForward("words");  //转向对应mapping中的forward}}

6，输入页，form表单页 form.jsp文件如下：

<form action="words.do?method=insertWord" id="form" method="post"><table width="398">  <tr><td height="25" align="left" valign="top">     <input name="name" id="name" type="text" value="您的称呼:" onBlur="if (value ==''){value='您的称呼:'}"></td>  </tr>  <tr>        <td height="25" align="left" valign="top">     <input name="email" id="email" type="text"onfocus="if (value =='您的邮箱:'){value =''}" onBlur="if (value ==''){value='您的邮箱:'}">        </td>  </tr>          <tr><td> <textarea name="content" id="content" overflow:auto" onfocus="if (value =='请输入内容:'){value =''}" onBlur="if (value ==''){value='请输入内容:'}"></textarea></td> </tr></table></form>

然后访问form表单页就可以运行了
2，不含form表单页的流程：
其实大致都是一样的，只不过直接要访问action地址，然后直接处理，比如你要输出内容直接在action里处理，然后用request.setAttribute("name",调用方法);把name传到页面上，然后在相应的页面上用bean标签或者logic标签直接输出就可以了
如果需要把id传值到相应页面上然后访问，那么就要通过超链接里把id传过去
例如：<a href="dongtai.do?method=dongtai&id=<bean:write name="dongtai" property="id" />"><bean:write name="dongtai" property="title" /> </a> 
就可以把id传到相应的页面上，然后在action里用String id= request.getParameter("id");接收，然后把id传到相应的方法里，然后就可以了！