Spring MVC 返回JSON数据

最新推荐文章于 2024-10-11 09:02:58 发布

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本文介绍如何在Spring MVC项目中配置Jackson来处理JSON数据，并展示了一个简单的控制器示例，该示例使用@ResponseBody注解返回JSON格式的数据。

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添加依赖包

maven pom.xml

<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.9.4</version>
		</dependency>

修改Spring mvc相关配置文件

在beans节点添加

xmlns:mvc="http://www.springframework.org/schema/mvc"

xsi:schemaLocation="http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
       ....">

<mvc:annotation-driven></mvc:annotation-driven>

完整示例：

<?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:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context" 
	xmlns:p="http://www.springframework.org/schema/p"
	xmlns:jdbc="http://www.springframework.org/schema/jdbc"
	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/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/jdbc
        http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

	<context:component-scan base-package="com.gyb.spring02" />
	<context:annotation-config></context:annotation-config>
	<mvc:annotation-driven></mvc:annotation-driven>
	<bean id="internalResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" 
		p:prefix="/WEB-INF/classes/static/jsp/"
		p:suffix=".jsp" />
</beans>

在Controller类的方法上添加@ResponseBody注解

示例：

package com.gyb.spring02.web;

import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.gyb.spring02.service.TestService;

@Controller
public class TestController {
	@Autowired
	private TestService testService;
	
	@ResponseBody
	@RequestMapping("/test")
	public List<String> test() {
		testService.test();
		ArrayList<String> list = new ArrayList<>();
		list.add("123");
		return list;
	}
}

ok！