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1) 国产开源软件要支持的
<dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.1</version> </dependency>
2) spring没有提供相应的HttpMessageConverter可以自己写一个。
package com.alibaba.fastjson.spring.support; import java.io.ByteArrayOutputStream; import java.io.IOException; 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; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.serializer.SerializerFeature; public class MappingFastJsonHttpMessageConverter extends AbstractHttpMessageConverter<Object> { public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8"); // fastjson特性参数 private SerializerFeature[] serializerFeature; public SerializerFeature[] getSerializerFeature() { return serializerFeature; } public void setSerializerFeature(SerializerFeature[] serializerFeature) { this.serializerFeature = serializerFeature; } public MappingFastJsonHttpMessageConverter() { super(new MediaType("application", "json", DEFAULT_CHARSET)); } @Override public boolean canRead(Class<?> clazz, MediaType mediaType) { // JavaType javaType = getJavaType(clazz); // return this.objectMapper.canDeserialize(javaType) && // canRead(mediaType); return true; } @Override public boolean canWrite(Class<?> clazz, MediaType mediaType) { // return this.objectMapper.canSerialize(clazz) && canWrite(mediaType); return true; } @Override protected boolean supports(Class<?> clazz) { // should not be called, since we override canRead/Write instead throw new UnsupportedOperationException(); } @Override protected Object readInternal(Class<?> clazz, HttpInputMessage inputMessage) throws IOException, HttpMessageNotReadableException { ByteArrayOutputStream baos = new ByteArrayOutputStream(); int i; while ((i = inputMessage.getBody().read()) != -1) { baos.write(i); } return JSON.parseArray(baos.toString(), clazz); } @Override protected void writeInternal(Object o, HttpOutputMessage outputMessage) throws IOException, HttpMessageNotWritableException { String jsonString = JSON.toJSONString(o, serializerFeature); OutputStream out = outputMessage.getBody(); out.write(jsonString.getBytes(DEFAULT_CHARSET)); out.flush(); } }
3) 配置
<mvc:annotation-driven> <mvc:message-converters register-defaults="true" > <bean class="com.alibaba.fastjson.spring.support.MappingFastJsonHttpMessageConverter"> <property name="supportedMediaTypes" value="application/json" /> <property name="serializerFeature"> <array> <value>WriteMapNullValue</value> <value>QuoteFieldNames</value> </array> </property> </bean> </mvc:message-converters> </mvc:annotation-driven>
