SpringMvc对Json和servlet支持

对servlet支持，cookie

<body>
<form action="user/login.do" method="post">
	<table>
		<tr>
			<td>用户名：</td>
			<td><input type="text" name="userName"/></td>
		</tr>
		<tr>
			<td>密码：</td>
			<td><input type="password" name="password"/></td>
		</tr>
		<tr>
			<td>
				<input type="submit" value="登录"/>
			</td>
		</tr>
	</table>
</form>
</body>



<body>
Main.jsp  ${currentUser.userName }
</body>

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.java1234.model.User;

@Controller
@RequestMapping("/user")
public class UserController {

	@RequestMapping("/login")
	public String login(HttpServletRequest request,HttpServletResponse response){
		System.out.println("----登录验证---");
		String userName=request.getParameter("userName");
		String password=request.getParameter("password");
		Cookie cookie=new Cookie("user",userName+"-"+password);
		cookie.setMaxAge(1*60*60*24*7);
		User currentUser=new User(userName,password);
		response.addCookie(cookie);
		HttpSession session=request.getSession();
		session.setAttribute("currentUser", currentUser);
		return "redirect:/main.jsp";
	}
}

使用request或sesion

	@RequestMapping("/login2")
	public String login2(HttpServletRequest request){
		return "redirect:/main.jsp";
	}
	
	@RequestMapping("/login3")
	public String login3(HttpSession session){
		return "redirect:/main.jsp";
	}

springMvc对json的支持

配置文件bean.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

	<!-- 使用注解的包，包括子集 -->
    <context:component-scan base-package="com.java"/>

	<!-- 支持对象与json的转换。 -->
    <mvc:annotation-driven/> 

    <!-- 视图解析器 -->
	<bean id="viewResolver"
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/jsp/" />
		<property name="suffix" value=".jsp"></property>
	</bean>

</beans>

@ResponseBody返回user的json对象

	@RequestMapping("/ajax")
	public @ResponseBody User ajax(){
		User user=new User("zhangsan","123");
		return user;
	}

util

object o为传入的json对象

import java.io.PrintWriter;

import javax.servlet.http.HttpServletResponse;


public class ResponseUtil {

	public static void write(HttpServletResponse response,Object o)throws Exception{
		response.setContentType("text/html;charset=utf-8");
		PrintWriter out=response.getWriter();
		out.println(o.toString());
		out.flush();
		out.close();
	}
}

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SpringMvc对Json和servlet支持

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