前端請求：

$.ajax({
            url: basePath() + "/index/login.do",
            type : "post",
            data: JSON.stringify(form),
            dataType : "json",
            contentType : "application/json;charset=utf8",
            success: function (data) {
                console.log(data);
            },
            error: function () {

            }
        });
 

後端接收：

@ResponseBody
	@RequestMapping(value = "/login",method = RequestMethod.POST,produces = "application/json;charset=utf8")
	public JSONObject login(@RequestBody LoginVo loginVo){

		JSONObject result = new JSONObject();
		UsernamePasswordToken token = new UsernamePasswordToken(loginVo.getUsername(),loginVo.getPassword());
		System.out.println(loginVo.isRememberMe());
		Subject subject = SecurityUtils.getSubject();
		subject.login(token);
		if (subject.isAuthenticated()){
			result.put("result",true);
		}else{
			result.put("result",false);
		}
		return result;
	}
 

前端ajax請求，後端使用@RequestBody接收，報出415請求資料格式錯誤

錯誤原因：springMVC無法讀取ajax設定好的dataType並以對應的方式處理請求頭，進而無法處理json資料

解決辦法：在maven中引入Jackson相關jar包，並在springMVC的xml中引入相關配置，maven和springMVC的相關程式碼如下：

maven：

<dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.6</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.6</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.6</version>
        </dependency>
 

springMVC：

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" />
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
        <property name="messageConverters">
            <list>
                <!-- 設定返回字串編碼 -->
                <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                    <property name = "supportedMediaTypes">
                        <list>
                            <value>text/html;charset=UTF-8</value>
                            <value>application/json;charset=UTF-8</value>
                        </list>
                    </property>
                </bean>
                <!-- json轉換器 -->
                <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                    <property name="supportedMediaTypes">
                        <list>
                            <value>text/html;charset=UTF-8</value>
                            <value>application/json;charset=UTF-8</value>
                        </list>
                    </property>
                </bean>
            </list>
        </property>
    </bean>