org.springframework.http.converter.json.MappingJacksonHttpMessageConverter

1.1、异常描述

Description	Resource	Path	Location	Type
Class 'org.springframework.http.converter.json.MappingJacksonHttpMessageConverter' not found [config set: testweba/web-context]	spring-mvc.xml	                
/testweba/src/main/resources	line 13	Spring Beans Problem

1.2、原因分析

Spring3升级到Spring4时， 运行时出现找不到MappingJacksonHttpMessageConverter的情况
原因是Spring 3.x 和4.X处理JSON的一个类不一样，而这个东西又配置在xml文件中，所以编译时又无法发现

1.3 解决办法

spring3.x是org.springframework.http.converter.json.MappingJacksonHttpMessageConverter

spring4.x是org.springframework.http.converter.json.MappingJackson2HttpMessageConverter

1. 查找替换所有XML中名字
2. 同时加入最新的FastJackson依赖

---

2.1 异常描述

Description	Resource	Path	Location	Type
Build path is incomplete. Cannot find class file for com/fasterxml/jackson/core/JsonGenerator	spring-mvc.xml	/testweba/src/main/resources	line 13	Spring AOP Problem

2.2 原因分析

Spring 4.x 需要依赖的相关FastJackson jar

2.3 解决办法

<dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-core</artifactId>
                <version>2.8.5</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>2.8.5</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-annotations</artifactId>
                <version>2.8.5</version>
            </dependency>'''

http://www.cnblogs.com/chry/p/6283483.html
http://www.sojson.com/blog/145.html