spring mvc: json练习

spring mvc: json练习

本例需要用到的json包：

如下：
jackson-databind
jackson-core
jackson-annotations

<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations -->
	<dependency>
	    <groupId>com.fasterxml.jackson.core</groupId>
	    <artifactId>jackson-annotations</artifactId>
	    <version>2.7.4</version>
	</dependency>
		<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
	<dependency>
	    <groupId>com.fasterxml.jackson.core</groupId>
	    <artifactId>jackson-core</artifactId>
	    <version>2.7.4</version>
	</dependency>
		<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
	<dependency>
	    <groupId>com.fasterxml.jackson.core</groupId>
	    <artifactId>jackson-databind</artifactId>
	    <version>2.7.4</version>
	</dependency>

　　

同时需要Bean视图名的解析支持

org.springframework.web.servlet.view.BeanNameViewResolver

　　

xml配置如下：

web.xml

<web-app>
  <display-name>Archetype Created Web Application</display-name>

<!--配置文件路径-->
<context-param>
 	<param-name>contextConfigLocation</param-name>
	<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>

<!-- 字符过滤器 -->
<filter>
   <filter-name>encodingFilter</filter-name>
   <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
   <init-param>
       <param-name>encoding</param-name>
       <param-value>UTF-8</param-value>
   </init-param>
</filter>
<filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping> 

<!-- 监听转发 -->
<listener>
	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
    <servlet-name>json</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>json</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>    

</web-app>

　　

applicatoinContext.xml自动Bean引入

<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
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">

<!-- 默认：注解映射支持 -->
<mvc:annotation-driven/>
<!-- 静态资源配置 -->
<mvc:resources location="/pages/**" mapping="/pages/"/>

<!-- 自动扫描包名,controller -->
<context:component-scan base-package="json"/>		

</beans>

　　

json-servlet.xml Bean视图名的解析

<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
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">

<!-- bean视图解析 -->
<bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>					

</beans>

　　

Student.java

package json;

public class Student {

	String name;
	Integer age;
	String gender;

	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}

	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}

	public String getGender() {
		return gender;
	}
	public void setGender(String gender) {
		this.gender = gender;
	}

}

　　

StudentController.java

package json;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
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.ResponseBody;

@Controller
@RequestMapping(value="/student")
public class StudentController {

	@RequestMapping(value="/one", method=RequestMethod.GET)
	@ResponseBody
	public Student getStudent()
	{
		Student student = new Student();
		student.setAge(25);
		student.setGender("男");
		student.setName("张三");
		return student;
	}

	@RequestMapping(value="/all", method=RequestMethod.GET)
	@ResponseBody
	public Map<String, Object> getStudentAll()
	{
		Map<String, Object> maps = new HashMap<String, Object>();
		List<Student> list = new ArrayList<Student>();
		Student student1 = new Student();
		student1.setAge(25);
		student1.setGender("男");
		student1.setName("张三");
		list.add(student1);

		student1.setAge(26);
		student1.setGender("男");
		student1.setName("李四");
		list.add(student1);

		maps.put("author", "田七");
		maps.put("school", "suzhou");
		maps.put("list", list);

		return maps;
	}
}

　　

访问地址：

http://localhost:8080/gugua3/student/one

{"name":"张三","age":25,"gender":"男"}

　　

http://localhost:8080/gugua3/student/all

{"school":"suzhou","author":"田七","list":[{"name":"李四","age":26,"gender":"男"},{"name":"李四","age":26,"gender":"男"}]}