初识 Spring(10)---(SpringMVC--向前台传递数据）

其他 2018-08-14 11:09:05 阅读次数: 0

SpringMVC--向前台传递数据

在上篇博客基础上继续

第一种方式：返回一个ModelAndView

修改代码：SpringmvcTest.java

package com.neuedu.springmvc.controller;

import java.util.Date;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import com.neuedu.springmvc.po.User;
import com.sun.javafx.scene.accessibility.Attribute;
import com.sun.org.apache.bcel.internal.generic.NEW;

@Controller
//@RequestMapping("/test")
/*这是类*/

public class SpringmvcTest {
	
	/*向前台传递数据的第一种方式：
	1.返回一个ModelAndView*/
	
	@RequestMapping("/testReturnData")      //新增代码
	public ModelAndView testReturnData() {
		ModelAndView modelAndView= new ModelAndView();
		modelAndView.addObject("date", new Date());
        modelAndView.addObject("username","zhangsan");
		modelAndView.setViewName("success");
		
		return modelAndView;                //新增代码
	}
	/*实体类*/
	@RequestMapping("/testPojo")
	public String testPojo(User user) {
		System.out.println(user);
		
		return "success";
	}
	
	
	@RequestMapping("/testParamsRequired")
	public String testParamsRequired( @RequestParam (value="username",required=true) String username,Integer age) {
		System.out.println("testParamsRequired,username:" + username);
		System.out.println("testParamsRequired,age:" + age);
		return "success";
	}
	
	
	@RequestMapping("/testParams")
	public String testParams(@RequestParam("name") String username,
			@RequestParam("pwd") String password) {
		System.out.println("username:" + username);
		System.out.println("password:" + password);
		return "success";
	}
	
	@RequestMapping(value= {"/testUrl1","testUrl2"})
	public String testUrl() {
		System.out.println("testUrl");
		return "success";
	}
	/*	method=RequestMethod.POST 限定接收用什么方式的请求*/
	@RequestMapping(value="/testMethod",method=RequestMethod.GET)
	public String testMethod() {
		System.out.print("testMethod...");
		return "success";
	}
	/*既可以用在方法上，也可以用在类上，这是方法*/
	@RequestMapping("/testRequestMapping")
	public String testRequestMapping() {
		System.out.println("testRequestMapping...");
		return "success";
	}
	
}

index.jsp

<%@ 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>
	<a href="hello"> Hello Index</a>
	<br></br>
	<a href="testRequestMapping"> Hello testRequestMapping</a>
	<br></br>
	
	<a href="testMethod"> Hello testMethod</a>
	<br></br>
	<form action="testMethod" method="post"> 
		<input type="submit" value="testMethod">
	</form>
	<br></br>
	<a href="testUrl1"> Hello testUrl1</a>
	<br></br>
	<a href="testUrl2"> Hello testUrl2</a>
	<br></br>
	<a href="testParams?name=zhang&pwd=123"> Hello testParams</a>
	<br></br>
	<a href="testParamsRequired?username=zhang"> Hello testParamsRequired</a>
	<br></br>
	<form action="testPojo" method="post">
		username: <input type="text" name="username"/><br>
		password: <input type="text" name="password"/><br>
		gender:   <input type="radio" name="gengder" value="male"/>男<br><input type="radio" name="gender" value="female"/>女<br>
		email: <input type="text" name="email"/><br>
		phone: <input type="text" name="phone"/><br>
		province: <input type="text" name="address.province"/><br>
		city: <input type="text" name="address.city"/><br>
		<input type="submit" value="testPojo">
	</form>
	<br></br>
	<a href="testReturnData"> Hello testReturnData</a>     //新增代码
	
</body>
</html>

success.jsp

<%@ 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>
	<h4>Success page</h4>
	<hr>
	
	<h4>
    当前日期：${requestScope.date}                //新增代码
    用户名：${requestScope.username}
    </h4>                                            
</body>
</html>

输出：点击按钮---返回当前日期

    

第二种方式：返回一个ModelAndView

2.在springMVC的参数中可以直接使用的有：
    HttpServletRequest
    HttpServletResponse
    HttpSession
    Map
    Model

修改代码：SpringmvcTest.java

package com.neuedu.springmvc.controller;

import java.util.Date;
import java.util.Map;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import com.neuedu.springmvc.po.User;

import com.sun.javafx.scene.accessibility.Attribute;
import com.sun.org.apache.bcel.internal.generic.NEW;

@Controller
//@RequestMapping("/test")
/*这是类*/

public class SpringmvcTest {
	
	/*向前台传递数据的第二种方式：              //新增代码
	2.在springMVC的参数中可以直接使用的有：
	HttpServletRequest
	HttpServletResponse
	HttpSession
	Map
	Model                                     //新增代码
	*/
	
	@RequestMapping("/testReturnData2")
	public String testReturnData2(Map<String,Object> map) {
		User user = new User("li", "1234", "female", "[email protected]", "15603320164");
		map.put("username","zhang2");
		map.put("user", user);
		return "success";
	}
	
	/*向前台传递数据的第一种方式：
	1.返回一个ModelAndView*/
	
	@RequestMapping("/testReturnData")
	public ModelAndView testReturnData() {
		ModelAndView modelAndView= new ModelAndView();
		modelAndView.addObject("date", new Date());
		modelAndView.addObject("username","zhangsan");
		modelAndView.setViewName("success");
		
		return modelAndView;
	}
	
	
	
	
	
	/*实体类*/
	@RequestMapping("/testPojo")
	public String testPojo(User user) {
		System.out.println(user);
		
		return "success";
	}
	
	
	@RequestMapping("/testParamsRequired")
	public String testParamsRequired( @RequestParam (value="username",required=true) String username,Integer age) {
		System.out.println("testParamsRequired,username:" + username);
		System.out.println("testParamsRequired,age:" + age);
		return "success";
	}
	
	
	@RequestMapping("/testParams")
	public String testParams(@RequestParam("name") String username,
			@RequestParam("pwd") String password) {
		System.out.println("username:" + username);
		System.out.println("password:" + password);
		return "success";
	}
	
	@RequestMapping(value= {"/testUrl1","testUrl2"})
	public String testUrl() {
		System.out.println("testUrl");
		return "success";
	}
	/*	method=RequestMethod.POST 限定接收用什么方式的请求*/
	@RequestMapping(value="/testMethod",method=RequestMethod.GET)
	public String testMethod() {
		System.out.print("testMethod...");
		return "success";
	}
	/*既可以用在方法上，也可以用在类上，这是方法*/
	@RequestMapping("/testRequestMapping")
	public String testRequestMapping() {
		System.out.println("testRequestMapping...");
		return "success";
	}
	
}

index.jsp

<%@ 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>
	<a href="hello"> Hello Index</a>
	<br></br>
	<a href="testRequestMapping"> Hello testRequestMapping</a>
	<br></br>
	
	<a href="testMethod"> Hello testMethod</a>
	<br></br>
	<form action="testMethod" method="post"> 
		<input type="submit" value="testMethod">
	</form>
	<br></br>
	<a href="testUrl1"> Hello testUrl1</a>
	<br></br>
	<a href="testUrl2"> Hello testUrl2</a>
	<br></br>
	<a href="testParams?name=zhang&pwd=123"> Hello testParams</a>
	<br></br>
	<a href="testParamsRequired?username=zhang"> Hello testParamsRequired</a>
	<br></br>
	<form action="testPojo" method="post">
		username: <input type="text" name="username"/><br>
		password: <input type="text" name="password"/><br>
		gender:   <input type="radio" name="gengder" value="male"/>男<br><input type="radio" name="gender" value="female"/>女<br>
		email: <input type="text" name="email"/><br>
		phone: <input type="text" name="phone"/><br>
		province: <input type="text" name="address.province"/><br>
		city: <input type="text" name="address.city"/><br>
		<input type="submit" value="testPojo">
	</form>
	<br></br>
	<a href="testReturnData"> Hello testReturnData</a>
	<br></br>
	<a href="testReturnData2"> Hello testReturnData2</a>       //新增代码
	
</body>
</html>

success.jsp

<%@ 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>
	<h4>Success page</h4>
	<hr>
	
	<h4>
	当前日期：${requestScope.date}
	用户名：${requestScope.username}
	</h4>
	<h4>
	user：${requestScope.user.password}
	用户名：${requestScope.username}
	</h4>
</body>
</html>

输出：

  

第三种方式：返回一个Model

修改代码：SpringmvcTest.java

package com.neuedu.springmvc.controller;

import java.util.Date;
import java.util.Map;
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 org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import com.neuedu.springmvc.po.User;

import com.sun.javafx.scene.accessibility.Attribute;
import com.sun.org.apache.bcel.internal.generic.NEW;

@Controller
//@RequestMapping("/test")
/*这是类*/

public class SpringmvcTest {                                  //新增代码
	
	@RequestMapping("/testReturnData3")
	public String testReturnData3(User user,Model model) {
		model.addAttribute("user",user);
		return "success";
	}                                                        //新增代码
	
	/*向前台传递数据的第二种方式：
	2.在springMVC的参数中可以直接使用的有：
	HttpServletRequest
	HttpServletResponse
	HttpSession
	Map
	Model
	*/
	
	@RequestMapping("/testReturnData2")
	public String testReturnData2(Map<String,Object> map) {
		User user = new User("li", "1234", "female", "[email protected]", "15603320164");
		map.put("username","zhang2");
		map.put("user", user);
		return "success";
	}
	
	/*向前台传递数据的第一种方式：
	1.返回一个ModelAndView*/
	
	@RequestMapping("/testReturnData")
	public ModelAndView testReturnData() {
		ModelAndView modelAndView= new ModelAndView();
		modelAndView.addObject("date", new Date());
		modelAndView.addObject("username","zhangsan");
		modelAndView.setViewName("success");
		
		return modelAndView;
	}
	
	
	
	
	
	/*实体类*/
	@RequestMapping("/testPojo")
	public String testPojo(User user) {
		System.out.println(user);
		
		return "success";
	}
	
	
	@RequestMapping("/testParamsRequired")
	public String testParamsRequired( @RequestParam (value="username",required=true) String username,Integer age) {
		System.out.println("testParamsRequired,username:" + username);
		System.out.println("testParamsRequired,age:" + age);
		return "success";
	}
	
	
	@RequestMapping("/testParams")
	public String testParams(@RequestParam("name") String username,
			@RequestParam("pwd") String password) {
		System.out.println("username:" + username);
		System.out.println("password:" + password);
		return "success";
	}
	
	@RequestMapping(value= {"/testUrl1","testUrl2"})
	public String testUrl() {
		System.out.println("testUrl");
		return "success";
	}
	/*	method=RequestMethod.POST 限定接收用什么方式的请求*/
	@RequestMapping(value="/testMethod",method=RequestMethod.GET)
	public String testMethod() {
		System.out.print("testMethod...");
		return "success";
	}
	/*既可以用在方法上，也可以用在类上，这是方法*/
	@RequestMapping("/testRequestMapping")
	public String testRequestMapping() {
		System.out.println("testRequestMapping...");
		return "success";
	}
	
}

index.jsp

<%@ 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>
	<a href="hello"> Hello Index</a>
	<br></br>
	<a href="testRequestMapping"> Hello testRequestMapping</a>
	<br></br>
	
	<a href="testMethod"> Hello testMethod</a>
	<br></br>
	<form action="testMethod" method="post"> 
		<input type="submit" value="testMethod">
	</form>
	<br></br>
	<a href="testUrl1"> Hello testUrl1</a>
	<br></br>
	<a href="testUrl2"> Hello testUrl2</a>
	<br></br>
	<a href="testParams?name=zhang&pwd=123"> Hello testParams</a>
	<br></br>
	<a href="testParamsRequired?username=zhang"> Hello testParamsRequired</a>
	<br></br>
	<form action="testPojo" method="post">
		username: <input type="text" name="username"/><br>
		password: <input type="text" name="password"/><br>
		gender:   <input type="radio" name="gengder" value="male"/>男<br><input type="radio" name="gender" value="female"/>女<br>
		email: <input type="text" name="email"/><br>
		phone: <input type="text" name="phone"/><br>
		province: <input type="text" name="address.province"/><br>
		city: <input type="text" name="address.city"/><br>
		<input type="submit" value="testPojo">
	</form>
	<br></br>
	<a href="testReturnData"> Hello testReturnData</a>
	<br></br>
	<a href="testReturnData2"> Hello testReturnData2</a>
	<br></br>
	<form action="testReturnData3" method="post">                   //新增代码
		username: <input type="text" name="username"/><br>
		password: <input type="text" name="password"/><br>
		gender:   <input type="radio" name="gengder" value="male"/>男<br><input type="radio" name="gender" value="female"/>女<br>
		email: <input type="text" name="email"/><br>
		phone: <input type="text" name="phone"/><br>
		province: <input type="text" name="address.province"/><br>
		city: <input type="text" name="address.city"/><br>
		<input type="submit" value="testReturnData3">
	</form>                                                        //新增代码
</body>
</html>

输出：

          

第四种方式：返回一个Request

修改代码：SpringmvcTest.java

package com.neuedu.springmvc.controller;

import java.util.Date;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

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 org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import com.neuedu.springmvc.po.User;

import com.sun.javafx.scene.accessibility.Attribute;
import com.sun.org.apache.bcel.internal.generic.NEW;

@Controller
//@RequestMapping("/test")
/*这是类*/

public class SpringmvcTest {                              //新增代码
	
	@RequestMapping("/testReturnData4")
	public String testReturnData4(User user,HttpServletRequest request){
		request.setAttribute("user",user);
		return "success";
	}                                                    //新增代码
	
	
	@RequestMapping("/testReturnData3")
	public String testReturnData3(User user,Model model) {
		model.addAttribute("user",user);
		return "success";
	}
	
	/*向前台传递数据的第二种方式：
	2.在springMVC的参数中可以直接使用的有：
	HttpServletRequest
	HttpServletResponse
	HttpSession
	Map
	Model
	*/
	
	@RequestMapping("/testReturnData2")
	public String testReturnData2(Map<String,Object> map) {
		User user = new User("li", "1234", "female", "[email protected]", "15603320164");
		map.put("username","zhang2");
		map.put("user", user);
		return "success";
	}
	
	/*向前台传递数据的第一种方式：
	1.返回一个ModelAndView*/
	
	@RequestMapping("/testReturnData")
	public ModelAndView testReturnData() {
		ModelAndView modelAndView= new ModelAndView();
		modelAndView.addObject("date", new Date());
		modelAndView.addObject("username","zhangsan");
		modelAndView.setViewName("success");
		
		return modelAndView;
	}
	
	
	
	
	
	/*实体类*/
	@RequestMapping("/testPojo")
	public String testPojo(User user) {
		System.out.println(user);
		
		return "success";
	}
	
	
	@RequestMapping("/testParamsRequired")
	public String testParamsRequired( @RequestParam (value="username",required=true) String username,Integer age) {
		System.out.println("testParamsRequired,username:" + username);
		System.out.println("testParamsRequired,age:" + age);
		return "success";
	}
	
	
	@RequestMapping("/testParams")
	public String testParams(@RequestParam("name") String username,
			@RequestParam("pwd") String password) {
		System.out.println("username:" + username);
		System.out.println("password:" + password);
		return "success";
	}
	
	@RequestMapping(value= {"/testUrl1","testUrl2"})
	public String testUrl() {
		System.out.println("testUrl");
		return "success";
	}
	/*	method=RequestMethod.POST 限定接收用什么方式的请求*/
	@RequestMapping(value="/testMethod",method=RequestMethod.GET)
	public String testMethod() {
		System.out.print("testMethod...");
		return "success";
	}
	/*既可以用在方法上，也可以用在类上，这是方法*/
	@RequestMapping("/testRequestMapping")
	public String testRequestMapping() {
		System.out.println("testRequestMapping...");
		return "success";
	}
	
}

index.jsp

<%@ 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>
	<a href="hello"> Hello Index</a>
	<br></br>
	<a href="testRequestMapping"> Hello testRequestMapping</a>
	<br></br>
	
	<a href="testMethod"> Hello testMethod</a>
	<br></br>
	<form action="testMethod" method="post"> 
		<input type="submit" value="testMethod">
	</form>
	<br></br>
	<a href="testUrl1"> Hello testUrl1</a>
	<br></br>
	<a href="testUrl2"> Hello testUrl2</a>
	<br></br>
	<a href="testParams?name=zhang&pwd=123"> Hello testParams</a>
	<br></br>
	<a href="testParamsRequired?username=zhang"> Hello testParamsRequired</a>
	<br></br>
	<form action="testPojo" method="post">
		username: <input type="text" name="username"/><br>
		password: <input type="text" name="password"/><br>
		gender:   <input type="radio" name="gengder" value="male"/>男<br><input type="radio" name="gender" value="female"/>女<br>
		email: <input type="text" name="email"/><br>
		phone: <input type="text" name="phone"/><br>
		province: <input type="text" name="address.province"/><br>
		city: <input type="text" name="address.city"/><br>
		<input type="submit" value="testPojo">
	</form>
	<br></br>
	<a href="testReturnData"> Hello testReturnData</a>
	<br></br>
	<a href="testReturnData2"> Hello testReturnData2</a>
	<br></br>
	<form action="testReturnData4" method="post">              //修改代码
		username: <input type="text" name="username"/><br>
		password: <input type="text" name="password"/><br>
		gender:   <input type="radio" name="gengder" value="male"/>男<br><input type="radio" name="gender" value="female"/>女<br>
		email: <input type="text" name="email"/><br>
		phone: <input type="text" name="phone"/><br>
		province: <input type="text" name="address.province"/><br>
		city: <input type="text" name="address.city"/><br>
		<input type="submit" value="testReturnData4">
	</form>                                                    //修改代码
</body>
</html>

输出：

   

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