配置文件解决JSON中文乱码

`<mvc:annotation-driven>`
	`<mvc:message-converters register-defaults="true">`
		`<bean class="org.springframework.http.converter.StringHttpMessageConverter">`
			`<constructor-arg value="UTF-8"/>`
		`</bean>`
		`<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">`
			`<property name="objectMapper">`
				`<bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean">`
					`<property name="failOnEmptyBeans" value="false"></property>`
				`</bean>`
			`</property>`
		`</bean>`
	`</mvc:message-converters>`
`</mvc:annotation-driven>`