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在使用spring3.0.5 mvc开发时，进行json接口数据开发，使用JSONObject.fromObject(object)返回json数据。遇到“org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation”错误。
解决方案1：
@ResponseBody 方法的返回类型由JSONObject改为 Object, return时直接返回Object;
修改springmvc-servlet.xml, 增加 messageConverters
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <!-- Object->json --> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" /> </list> </property> </bean>
需要jacksonjar包支持： jackson-core-lgpl-1.2.1.jar和 jackson-core-lgpl-1.2.1.jar。
解决方案2：
@ResponseBody 方法的返回类型由JSONObject改为 String, return时直接返回JSONObject.fromObject(object).toString();
解决方案3：
返回类型为JSONObject, 编写一个自己converter.
package javacommon.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.nio.charset.Charset;
import org.springframework.http.HttpInputMessage;
import org.springframework.http.HttpOutputMessage;
import org.springframework.http.MediaType;
import org.springframework.http.converter.AbstractHttpMessageConverter;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.http.converter.HttpMessageNotWritableException;
public class JaksonConverter extends AbstractHttpMessageConverter<Object> {
public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
public JaksonConverter() {
super(new MediaType("application", "json", DEFAULT_CHARSET));
}
@Override
protected boolean supports(Class<?> clazz) {
// TODO Auto-generated method stub
return false;
}
@Override
protected Object readInternal(Class<? extends Object> clazz,
HttpInputMessage inputMessage) throws IOException,
HttpMessageNotReadableException {
logger.info(clazz.getSimpleName());
InputStream inputStream=inputMessage.getBody();
StringBuilder stringBuilder = new StringBuilder();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String line = null;
while((line = bufferedReader.readLine()) != null){
stringBuilder.append(line);
}
logger.info(stringBuilder.toString());
return stringBuilder;
}
@Override
protected void writeInternal(Object t, HttpOutputMessage outputMessage)
throws IOException, HttpMessageNotWritableException {
logger.info(t.getClass().getSimpleName());
// HashMap
// JSONObject
logger.info(t.toString());
OutputStream os=outputMessage.getBody();
os.write(t.toString().getBytes("utf-8"));
os.flush();
}
}
将方案1中的converter换成编写的即可。
Spring3.0 Could not find acceptable representation 解决方案
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原文地址：http://www.cnblogs.com/leegtang/p/4463178.html
