springmvc添加mock json的支持

在springmvc中 添加对服务器classPath下的json文件解析之后返回的mock功能：

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

@RestController
@RequestMapping("/mock")
public class MockController {

    @RequestMapping(value = "/{module}/{action}", method = RequestMethod.POST)
    public JsonNode mockContent(@PathVariable String module, @PathVariable String action, HttpServletRequest request,
            HttpServletResponse response) {
        JsonNode actualObj = null;
        InputStream fis = null;
        try {
            ClassLoader ctxLoader = Thread.currentThread().getContextClassLoader();
            URL resURL = ctxLoader.getResource(action + ".json");
            URLConnection resConn = resURL.openConnection();
            resConn.setUseCaches(false);
            fis = resConn.getInputStream();
            StringBuilder builder = new StringBuilder();
            int ch;
            while ((ch = fis.read()) != -1) {
                builder.append((char) ch);
            }
            ObjectMapper mapper = new ObjectMapper();
            actualObj = mapper.readTree(builder.toString());
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fis != null) {
                try {
                    fis.close();
                } catch (IOException e) {
                }
            }
        }
        return actualObj;
    }
}

相应的也可以增加其他的类型支持，比如string数据， 或者是其他的。由于 springmvc rest接口默认会使用json的转化器，所以需要转化成对应的json格式