📄 listcompaniesaction.java
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package com.tarena.servlet.action;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.tarena.dao.CompanyDao;
import com.tarena.dao.CompanyDaoImpl;
import com.tarena.vo.Company;
public class ListCompaniesAction implements Action {
public String execute(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
CompanyDao comdao = new CompanyDaoImpl();
List<Company> comps = comdao.listCompanies();
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<body>");
out.println("<center>");
out.println("<h1><head>欢迎光临IT速查系统</head></h1>");
out.println("<form method=post action='company?action=query'>");
out.println("<table>");
out.println("<body>");
out.println("<tr>");
out.println("<td>公司名字：</td>");
out.println("<td><input type=text size=20 name='name' /></td>");
out.println("<td>所在城市：</td>");
out.println("<td><input type=text size=20 name='city' /></td>");
out.println("<td>公司性质：</td>");
out.println("<td><input type=text size=20 name='kind' /></td>");
out.println("<td><input type=submit value='查询'/></td>");
out.println("</tr>");
out.println("</body>");
out.println("</table>");
out.println("</form>");
out.println("<table border=1>");
//列表的头
out.println("<tr>");
out.println("<td><b>公司名字</b></td>");
out.println("<td><b>所在城市</b></td>");
out.println("<td><b>公司地址</b></td>");
out.println("<td><b>公司规模</b></td>");
out.println("<td><b>要求技术</b></td>");
out.println("<td><b>公司性质</b></td>");
out.println("<td><b>联系邮箱</b></td>");
out.println("<td colspan=2><b>相应操作</b></td>");
out.println("</tr>");
//IT公司的信息
for(Company comp : comps) {
out.println("<tr>");
out.println("<td>" + comp.getName() +"</td>");
out.println("<td>" + comp.getCity() +"</td>");
out.println("<td>" + comp.getAddress() +"</td>");
out.println("<td>" + comp.getScale() +"</td>");
out.println("<td>" + comp.getRequiretech() +"</td>");
out.println("<td>" + comp.getKind() +"</td>");
out.println("<td>" + comp.getEmail() +"</td>");
out.println("<td>" + "<a href='company?action=modify&id=" + comp.getId() + "'>修改</a>" +"</td>");
out.println("<td>" + "<a href='company?action=delete&id=" + comp.getId() + "'>删除</a>" +"</td>");
out.println("</tr>");
}
out.println("</table>");
out.println("<br><br><br>");
out.println("<a href=add.html>添加It公司</a>    ");
out.println("<a href=logout>退出系统</a>    ");
out.println("</center>");
out.println("</body>");
out.println("</html>");
return null;
}
}
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