struts1 开发流程
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使用一个简单的例子记录struts1开发过程。
index界面上只有两个超链接，分别可以打开录入产品界面和显示产品列表界面.
newProduct.jsp是录入的界面，searchProduct.jsp是查询列表的界面。
ProductAction.java是处理逻辑的action
添加完struts支持后，lib目录下会增添struts的jar包、增添struts的配置文件：/WEB-INF/struts-config.xml、同时在web.xml中增添了struts的配置。
第一步：在WebRoot/META-INF/下新建一个context文件，通过jndi方式配置数据源，context.xml文件内容如下：
3) 创建工具类EncodingFilter.java，自定义过滤器，并在web.xml中配置，参考web.xml配置中内容。EncodingFilter.java的内容如下：
7) Action处理类ProductAction.java如下：
0、 描述
主要功能描述：index界面上只有两个超链接，分别可以打开录入产品界面和显示产品列表界面.
newProduct.jsp是录入的界面，searchProduct.jsp是查询列表的界面。
ProductAction.java是处理逻辑的action
简单描述流程图：
1、 构建环境
在Myeclipse中，新建一个工程StrutsTest，选择该工程，右键Myeclipse->add sruts capapibality，弹出界面，选择struts1.2支持。如下图所示:添加完struts支持后，lib目录下会增添struts的jar包、增添struts的配置文件：/WEB-INF/struts-config.xml、同时在web.xml中增添了struts的配置。
3、 代码编写
1) 创建表结构，只有三个字段create table t_product( product_id varchar2(4) primary key, product_name varchar2(50) not null, price float);2) 创建工具类Util.java，从数据库连接池中获得连接。需要两个步骤
第一步：在WebRoot/META-INF/下新建一个context文件，通过jndi方式配置数据源，context.xml文件内容如下：
<?xml version="1.0" encoding="UTF-8"?><Context> <Resource auth="Container" name="jdbc/StrutsTestPool" type="javax.sql.DataSource" driverClassName="oracle.jdbc.driver.OracleDriver" url="jdbc:oracle:thin:@127.0.0.1:1521:orcl" username="apps" password="apps" maxActive="20"/></Context>第二步：在util类中读取配置获得连接，util.java如下：
package com.company.struts.util;import java.sql.Connection;import javax.naming.Context;import javax.naming.InitialContext;import javax.sql.DataSource;public class Util {/** * 通过连接池得到连接 * @return * @throws Exception */public static Connection getPoolConnection() throws Exception{Context ctx = new InitialContext();DataSource ds = (DataSource)ctx.lookup("java:/comp/env/jdbc/StrutsTestPool");Connection conn = ds.getConnection();return conn;}}3) 创建工具类EncodingFilter.java，自定义过滤器，并在web.xml中配置，参考web.xml配置中内容。EncodingFilter.java的内容如下：
package com.company.struts.util;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;public class EncodingFilter implements Filter {public void destroy() {// TODO Auto-generated method stub}public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException {request.setCharacterEncoding("UTF-8");chain.doFilter(request, response);}public void init(FilterConfig arg0) throws ServletException {// TODO Auto-generated method stub}}4) 修改web.xml，指定首页为index.jsp。文件内容如下：最后定义了一个fileld的过滤器，是用来过滤字符编码的，后面会提到。<?xml version="1.0" encoding="UTF-8"?><web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <servlet> <servlet-name>action</servlet-name> <servlet-class>org.apache.struts.action.ActionServlet</servlet-class> <init-param> <param-name>config</param-name> <param-value>/WEB-INF/struts-config.xml</param-value> </init-param> <init-param> <param-name>debug</param-name> <param-value>3</param-value> </init-param> <init-param> <param-name>detail</param-name> <param-value>3</param-value> </init-param> <load-on-startup>0</load-on-startup> </servlet> <servlet-mapping> <servlet-name>action</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <!-- 自定义的fileld 用来过滤字符编码 --> <filter> <filter-name>EncodingFilter</filter-name> <filter-class>com.company.struts.util.EncodingFilter</filter-class> </filter> <filter-mapping> <filter-name>EncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping></web-app>5) 在WebRoot下打开index.jsp，去掉无用信息，写代码如下：
<%@ page language="java" pageEncoding="UTF-8"%><html> <head> <title></title> </head> <body> <br> <br> <br> <table width = "500px" align = "center" height = "200px"> <tr><td> <a href = "productAction.action?method=viewAddForm" target="black">input</a> <br /><br /> <a href = "productAction.action?method=query" target="black">search</a> </td></tr></table> </body></html>6) index.jsp中提到productAction.action?method=viewAddForm，需要在struts的配置文件struts-config.xml中配置实现的action，如下所示：
<?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="productForm" type="com.company.struts.vo.ProductVo" /> </form-beans> <global-exceptions /> <global-forwards /> <action-mappings> <action path="/productAction" type="com.company.struts.action.ProductAction" parameter = "method" scope="request" name="productForm"> <forward name="viewNewProduct" path="/newProduct.jsp"></forward> <forward name="viewSearchProduct" path="/searchProduct.jsp"></forward> </action> </action-mappings> <message-resources parameter="com.company.struts.ApplicationResources" /></struts-config>在配置文件中配置了action的实现类，以及作为上传数据时用来保存数据的form： productForm
7) Action处理类ProductAction.java如下：
package com.company.struts.action;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.util.ArrayList;import java.util.List;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.struts.util.Util;import com.company.struts.vo.ProductVo;public class ProductAction extends DispatchAction {/** * 转到新增界面 */public ActionForward viewAddForm(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception {return mapping.findForward("viewNewProduct");}/** * 转到查询界面 */public ActionForward viewSearchForm(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception {return mapping.findForward("viewSearchProduct");}<span style="white-space:pre"></span>/** * 保存 */public ActionForward save(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception {String msg = "SUCCESS";ProductVo vo = (ProductVo)form;String validateResult = validate(vo);if(validateResult != ""){msg = validateResult;}else{Connection conn = null;PreparedStatement psmt = null;try {conn = Util.getPoolConnection();String sql = "insert into t_product(product_id,product_name,price) values" +"('"+vo.getProductId()+"','"+vo.getProductName()+"','"+Float.parseFloat(vo.getPrice())+"')";psmt = conn.prepareStatement(sql);psmt.executeUpdate();} catch (Exception e) {e.printStackTrace();msg = e.getMessage();} finally{if(psmt != null){psmt.close();}if(conn != null){conn.close();}}}request.setAttribute("error", msg);return mapping.findForward("viewNewProduct");}<span style="white-space:pre"></span>/** *查询数据 */public ActionForward query(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception {String projectName = request.getParameter("queryTitle")== null?"":request.getParameter("queryTitle");Connection conn = null;PreparedStatement psmt = null;ResultSet rs = null;List<ProductVo> list = new ArrayList<ProductVo>();try{String sql = "select product_id,product_name,price from t_product where product_name like '%"+projectName+"%' order by product_id desc";conn = Util.getPoolConnection();psmt = conn.prepareStatement(sql);rs = psmt.executeQuery(sql);while(rs.next()){ProductVo vo = new ProductVo();vo.setProductId(rs.getString("product_id"));vo.setProductName(rs.getString("product_name"));vo.setPrice(rs.getString("price"));list.add(vo);}}catch(Exception e){e.printStackTrace();}finally{if(psmt != null){psmt.close();}if(conn != null){conn.close();}}request.setAttribute("List", list);return mapping.findForward("viewSearchProduct");} }<span style="white-space:pre"></span>/** * 上传数据校验 */public String validate(ProductVo vo){String returnStr = "";if(vo == null){returnStr = "不能传递空值";}else{if(vo.getProductId() == null || vo.getProductId() == "" || vo.getProductName() == null || vo.getProductName() == ""|| vo.getPrice() == null || vo.getPrice() == ""){returnStr = "值不能为空";}}return returnStr;}8) 保存数据的form，ProductVo如下所示：package com.company.struts.vo;import org.apache.struts.action.ActionForm;public class ProductVo extends ActionForm {private static final long serialVersionUID = 1L;private String productId;private String productName;private String price;public String getProductId() {return productId;}public void setProductId(String productId) {this.productId = productId;}public String getProductName() {return productName;}public void setProductName(String productName) {this.productName = productName;}public String getPrice() {return price;}public void setPrice(String price) {this.price = price;}}9) newProduct.jsp是录入界面，代码如下：<%@ page language="java" pageEncoding="UTF-8"%><html> <head> <title></title> </head> <body> <!-- 读取request中的error信息，如果第一次进入，则为null，不弹出框，非首次则根据action判断的结果，弹出不同提示框 --><script type="text/javascript"><% Object msg = request.getAttribute("error"); if(msg != null){ String temp = msg.toString(); if(!temp.equals("SUCCESS")){ String err = "保存失败!原因："+temp; %> alert("<%=err%>"); <% }else{ %> alert("保存成功！"); <% } } %></script><form action="productAction.action?method=save" name = "newForm" id = "newForm" method = "post"> <table width = "500px" align = "center" height = "500px"> <tr> <td> ppprocuctID: </td> <td> <input type = "text" name = "productId" id = "productId" /> </td> </tr> <tr> <td> pprocuctName: </td> <td> <input type = "text" name = "productName" id = "productName" /> </td> </tr><tr> <td> price: </td> <td> <input type = "text" name = "price" id = "price" /> </td> </tr> <tr> <td> <input type = "submit" value = "summit" /> </td> </tr></table> </form> </body></html>10) searchProduct.jsp是查询结果界面，代码如下：<%@ page language="java" pageEncoding="UTF-8"%><%@ page import="java.util.*"%><%@page import="com.company.struts.vo.ProductVo"%><html> <head> <title></title> </head> <body> <form action="productAction.action?method=query" name = "searchForm" id = "searchForm" method = "post"> <table width = "500px" align = "center"> <tr> <td> <input type = "text" name = "queryTitle" id = "queryTitle" /> <input type = "submit" name = "submit" id = "submit" value = "submit"/> </td> </tr></table> <%Object obj = request.getAttribute("List");if(obj != null){List<ProductVo> list = (List<ProductVo>)obj;for(int i = 0;i<list.size();i++){ProductVo vo = list.get(i);%><table width = "500px" align = "center" border = "1px"> <tr> <td> ProductId </td> <td> <%=vo.getProductId() %> </td> </tr> <tr> <td> ProductName </td> <td> <%=vo.getProductName() %> </td> </tr> <tr> <td> Price </td> <td> <%=vo.getPrice() %> </td> </tr></table><%}} %> </form> </body></html>至此，一个简单的例子就做完了，在浏览器输入http://localhost:8080/StrutsTest即可访问。 0 0
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