两天咱们学习了不少内容，先是学习了如何安装数据库，使用数据库的语句。好比：html
插入Insert 更新update 和 包括slecte语句和有关搜索的search语句。java
大概的代码是：web
<select id="selectuser"spring
parameterClass="cn.training.bean.UserBean"数据库
resultClass="cn.training.bean.UserBean">app
SELECTjsp
user_id as userId,post
userName as userName学习
FROMui
user
WHERE
user_id = #userId#
</select>
<insert id="insertuser"
parameterClass="cn.training.bean.UserBean">
insert into user(user_id) values(#userId#)
</insert>
<update id="updateuser"
parameterClass="cn.training.bean.UserBean">
update user set userName=#userName#
WHERE
user_id = #userId#
</update>
为了要实现增删查改，咱们创建了三个包 分别是userBean service和controller
在userBean包里的类中咱们写了以下代码：
package cn.training.bean;
public class UserBean {
private String userId;
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
private String userName;
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
}
在service包里的类中咱们写了以下代码：
package cn.training.service;
import jp.terasoluna.fw.dao.QueryDAO;
import jp.terasoluna.fw.dao.UpdateDAO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.RequestMapping;
import cn.training.bean.UserBean;
public class HelloWorldService {
@Autowired
QueryDAO queryDao;
@Autowired
UpdateDAO updateDao;
public UserBean searchUser(UserBean frm) {
frm = queryDao.executeForObject("user.selectuser", frm, UserBean.class);
//frm.setuserId("test");
return frm;
}
public int insert(UserBean frm){
int result=0;
try {
result=updateDao.execute("user.insertuser", frm);
}catch(Exception e){
return result;
}
return result;
}
public int updateUser(UserBean frm) {
return updateDao.execute("user.updateuser", frm);
}
}
在controller包里的类中咱们写了以下代码：
package cn.training.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import cn.training.bean.UserBean;
import cn.training.service.HelloWorldService;
@Controller("HelloWorldController")
@RequestMapping("/")
public class HelloWorldController {
@Autowired
HelloWorldService helloWorldService;
@RequestMapping(value = "/", method = RequestMethod.GET)
public String index(Model model) {
return "helloWorld";
}
@RequestMapping(value = "/init", method = RequestMethod.POST,params="search")
public String initLogin(UserBean userBean, Model model) {
UserBean result = helloWorldService.searchUser(userBean);
model.addAttribute("userBean", result);
return "login";
}
@RequestMapping(value = "/init", method = RequestMethod.POST,params="insert")
public String inithand(UserBean userinsert, Model model){
int insert = helloWorldService.insert(userinsert);
UserBean result=new UserBean();
model.addAttribute("userBean",result);
if(insert==1){
model.addAttribute("message","HaHa!");
return "login";
}
else{
model.addAttribute("message","Defult!");
return "login";
}
}
@RequestMapping(value = "/initupdate", method = RequestMethod.POST,params="update")
public String initsome(UserBean userupdate, Model model){
int update = helloWorldService.updateUser(userupdate);
model.addAttribute("userBean",userupdate);
return "login";
}
}
具体的传值方式看小帅博客。
而为了实如今前台页面的值的输入和获取咱们创建了两个jsp页面：
首先是login页面：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="initupdate" method="POST">
<input name="userId" type="text" value="${userBean.userId}">
<input name="userName" type="text" value="${userBean.userName}">
${message}
<button type="submit" name="update">更改</button>
</form>
</body>
</html>
其次和HelloWorld页面:
固然名字无所谓，代码以下：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="init" method="post">
<input name="userId" type="text">
<button type="submit" name="insert">插入</button>
<button type="submit" name="search">搜索</button>
</form>
</body>
</html>
而后还有几个数据库关联的地方改了几个数据，之后切记要改。不然没法实现链接。