关于spring整合velocity之后的Jsoup爬数据使用fastjson的一些小问题

1、导入jar包

<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.zdf.jsoup</groupId>
  <artifactId>ZdfJsoup</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <dependencies>
  	<dependency>
  		<groupId>org.jsoup</groupId>
  		<artifactId>jsoup</artifactId>
  		<version>1.11.2</version>
  	</dependency>
  	<dependency>
  		<groupId>com.alibaba</groupId>
  		<artifactId>fastjson</artifactId>
  		<version>1.2.45</version>
  	</dependency>
  	<dependency>
  		<groupId>org.springframework</groupId>
  		<artifactId>spring-core</artifactId>
  		<version>4.3.8.RELEASE</version>
  	</dependency>
  	<dependency>
  		<groupId>org.springframework</groupId>
  		<artifactId>spring-context</artifactId>
  		<version>4.3.8.RELEASE</version>
  	</dependency>
  	<dependency>
  		<groupId>org.springframework</groupId>
  		<artifactId>spring-webmvc</artifactId>
  		<version>4.3.8.RELEASE</version>
  	</dependency>
  	<dependency>
  		<groupId>org.springframework</groupId>
  		<artifactId>spring-context-support</artifactId>
  		<version>4.3.8.RELEASE</version>
  	</dependency>
  	<dependency>
  		<groupId>org.apache.velocity</groupId>
  		<artifactId>velocity</artifactId>
  		<version>1.6.3</version>
  	</dependency>
  	<dependency>
  		<groupId>org.apache.velocity</groupId>
  		<artifactId>velocity-tools</artifactId>
  		<version>2.0</version>
  	</dependency>
  	<dependency>
  		<groupId>log4j</groupId>
  		<artifactId>log4j</artifactId>
  		<version>1.2.11</version>
  	</dependency>
  </dependencies>
</project>

　　

2、代码编写

package com.zdf.jsoup;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.jsoup.Connection;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.alibaba.fastjson.JSON;
import com.zdf.jsoup.domain.Ticket;
@Controller
public class JsoupTest {
	@RequestMapping("/jsoupTest")
public @ResponseBody List<Ticket> jsoupTest() {
	String url = "http://dynamic.12306.cn/otn/board/boardMore";
		Connection connect = Jsoup.connect(url);
		try {
			List<Ticket> arr = new ArrayList<Ticket>();
			Document document = connect.get();
			Element table = document.getElementById("table_board_more");
			Elements tr = table.getElementsByTag("tr");
			for (Element element : tr) {
				Element td = element.child(0);
				if (td.val().equals("上海")) {
					System.out.println("出发地："+td.val()+"终点地："+element.child(1).val());
					Ticket ticket = new Ticket();
					ticket.setStartPlace("上海");
					ticket.setEndPlace(element.child(1).val());
					arr.add(ticket);
				}
			}
			return arr;
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
		
		
}
//	跳转页面
	@RequestMapping("/")
	public String toVm() {
		
		return "velocity/ticket";
		
	}
}

　　犯的错误：

1、虽然导入fastjson.jar但是没有在web.xml中配置转换，因此汇报No converter found for return value of type: class java.util.ArrayList

解决方案：

<!-- 处理器适配器 -->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingFastJsonHttpMessageConverter"/>
</list>
</property>
</bean>

<!-- 视图解析器 -->
<!-- velocity解析器,替换掉原来的jsp -->
 <bean id="mappingFastJsonHttpMessageConverter"
          class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>application/json;charset=UTF-8</value>
            </list>
        </property>
    </bean>

　　2、刚开始使用jsp来表示页面却显示的是源码，原因就是自己配置的是velocity的视图解析器，因此才会出现这个错误

解决方法：使用vm去导入该文件

两种方式：使用#include（“ticket.jsp”）是当前位置插入整张ticket.jsp页面，根据需要进行调整。