Spring整合JSON之@RequestBody和@ResponseBody

最新推荐文章于 2025-09-23 20:59:18 发布

原创最新推荐文章于 2025-09-23 20:59:18 发布 · 174 阅读

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#json #java #开发工具

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本文通过一个具体示例展示了如何使用 Spring MVC 框架处理 HTTP 请求。包括如何使用 @RequestMapping 映射请求路径，@PathVariable 获取 URL 中的变量，@RequestBody 和 @ResponseBody 处理请求和响应的数据。

原创转载请注明出处：http://agilestyle.iteye.com/blog/2318017

Reference

@RequestBody

http://docs.spring.io/spring/docs/current/spring-framework-reference/htmlsingle/#mvc-ann-requestbody

@ResponseBody

http://docs.spring.io/spring/docs/current/spring-framework-reference/htmlsingle/#mvc-ann-responsebody

Project Directory

Maven Dependency

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>org.fool</groupId>
	<artifactId>springmvc</artifactId>
	<name>springmvc</name>
	<packaging>war</packaging>
	<version>1.0.0-BUILD-SNAPSHOT</version>
	<properties>
		<org.springframework-version>4.2.7.RELEASE</org.springframework-version>
	</properties>
	<dependencies>
		<!-- Spring -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>

		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.8.1</version>
		</dependency>

		<dependency>
			<groupId>com.google.guava</groupId>
			<artifactId>guava</artifactId>
			<version>19.0</version>
		</dependency>

		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
			<version>3.4</version>
		</dependency>

		<!-- @Inject -->
		<dependency>
			<groupId>javax.inject</groupId>
			<artifactId>javax.inject</artifactId>
			<version>1</version>
		</dependency>

		<!-- Servlet -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.1.0</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet.jsp</groupId>
			<artifactId>javax.servlet.jsp-api</artifactId>
			<version>2.3.1</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>

		<!-- Test -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-eclipse-plugin</artifactId>
				<version>2.10</version>
				<configuration>
					<additionalProjectnatures>
						<projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
					</additionalProjectnatures>
					<additionalBuildcommands>
						<buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>
					</additionalBuildcommands>
					<downloadSources>true</downloadSources>
					<downloadJavadocs>true</downloadJavadocs>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.5.1</version>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
					<compilerArgument>-Xlint:all</compilerArgument>
					<showWarnings>true</showWarnings>
					<showDeprecation>true</showDeprecation>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.eclipse.jetty</groupId>
				<artifactId>jetty-maven-plugin</artifactId>
				<version>9.3.11.v20160721</version>
				<configuration>
					<scanIntervalSeconds>10</scanIntervalSeconds>
					<httpConnector>
						<port>8888</port>
					</httpConnector>
					<webApp>
						<contextPath>/springmvc</contextPath>
					</webApp>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

	<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/spring/root-context.xml</param-value>
	</context-param>

	<!-- Creates the Spring Container shared by all Servlets and Filters -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<!-- Processes application requests -->
	<servlet>
		<servlet-name>appServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<servlet-mapping>
		<servlet-name>appServlet</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>

</web-app>

root-context.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"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
	
	<!-- Root Context: defines shared resources visible to all other web components -->
		
</beans>

servlet-context.xml

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

	<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->

	<!-- Enables the Spring MVC @Controller programming model -->
	<annotation-driven />

	<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources 
		directory -->
	<resources mapping="/resources/**" location="/resources/" />

	<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
	<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<beans:property name="prefix" value="/WEB-INF/views/" />
		<beans:property name="suffix" value=".jsp" />
	</beans:bean>

	<context:component-scan base-package="org.fool.springmvc" />

</beans:beans>

User.java

package org.fool.springmvc;

import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;

public class User {
	private Long id;
	private String username;
	private String password;

	public User() {
	}

	public User(Long id, String username, String password) {
		this.id = id;
		this.username = username;
		this.password = password;
	}

	@Override
	public String toString() {
		return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
	}

	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

}

UserController.java

package org.fool.springmvc;

import java.util.Map;

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

import com.google.common.collect.Maps;

@Controller
@RequestMapping("/user")
public class UserController {
	
	public static Map<Long, User> userMap;
	
	static {
		userMap = Maps.newHashMap();
		userMap.put(10086L, new User(100086L, "hello", "world"));
		userMap.put(10087L, new User(100086L, "hey", "girl"));
		userMap.put(10088L, new User(100086L, "love", "me"));
		
	}
	
	@RequestMapping(value = "/testresponsebody/{id}", method = RequestMethod.GET)
	@ResponseBody
	public User testResponseBody(@PathVariable Long id) {
		User user = userMap.get(id);
		System.out.println(user);
		return user;
	}
	
	@RequestMapping(value = "/testrequestbody", method = RequestMethod.POST)
	@ResponseBody
	public User testRequestBody(@RequestBody User user) {
		System.out.println(user);
		return user;
	}
	
}

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>Index JSP</title>
<script type="text/javascript" src="resources/js/jquery-3.1.0.min.js"></script>
<script type="text/javascript">
	$(document).ready(function() {
		$("#responsebody").click(function() {
			responseBody();
		});
		$("#requestbody").click(function() {
			requestBody();
		});
	});

	function responseBody() {
		var url = 'http://localhost:8888/springmvc/user/testresponsebody/';
		var params = $('#id-select').val();
		url += params;
		alert(url);

		var args = {};

		$.get(url, args, function(data) {
			alert("id: " + data.id + "\nusername: " + data.username + "\npassword: " + data.password);
		});
	}

	function requestBody() {
		var url = 'http://localhost:8888/springmvc/user/testrequestbody';
		var data = '{"id":"' + $('#id').val() + '","username":"' + $('#username').val() + '","password":"'
				+ $('#password').val() + '"}';

		alert(data);

		$.ajax({
			url : url,
			data : data,
			type : "POST",
			dataType : 'json',
			contentType : 'application/json',
			success : function(data) {
				alert("id: " + data.id + "\nusername: " + data.username + "\npassword: " + data.password);
			},
			error : function() {
				alert('Error...');
			}
		});
	}
</script>
</head>
<body>
	<table>
		<tr>
			<td>id</td>
			<td>
				<select id="id-select">
					<option value="10086">10086</option>
					<option value="10087">10087</option>
					<option value="10088">10088</option>
				</select>
			</td>
		</tr>
		<tr>
			<td><input type="button" id="responsebody" value="test ResponseBody - GET" /></td>
		</tr>
	</table>

	<table>
		<tr>
			<td>id</td>
			<td><input id="id" value="10000"/></td>
		</tr>
		<tr>
			<td>username</td>
			<td><input id="username" value="Mr"/></td>
		</tr>
		<tr>
			<td>password</td>
			<td><input id="password" value="Big"/></td>
		</tr>
		<tr>
			<td><input type="button" id="requestbody" value="test RequestBody - POST" /></td>
		</tr>
	</table>
</body>
</html>