|
|
|
@ -1,5 +1,5 @@ |
|
|
|
|
/* |
|
|
|
|
* Copyright 2002-2012 the original author or authors. |
|
|
|
|
* Copyright 2002-2013 the original author or authors. |
|
|
|
|
* |
|
|
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); |
|
|
|
|
* you may not use this file except in compliance with the License. |
|
|
|
@ -17,12 +17,12 @@ |
|
|
|
|
package org.springframework.web.servlet.view.json; |
|
|
|
|
|
|
|
|
|
import java.io.ByteArrayOutputStream; |
|
|
|
|
import java.io.IOException; |
|
|
|
|
import java.io.OutputStream; |
|
|
|
|
import java.util.Collections; |
|
|
|
|
import java.util.HashMap; |
|
|
|
|
import java.util.Map; |
|
|
|
|
import java.util.Set; |
|
|
|
|
|
|
|
|
|
import javax.servlet.http.HttpServletRequest; |
|
|
|
|
import javax.servlet.http.HttpServletResponse; |
|
|
|
|
|
|
|
|
@ -30,15 +30,13 @@ import org.codehaus.jackson.JsonEncoding; |
|
|
|
|
import org.codehaus.jackson.JsonGenerator; |
|
|
|
|
import org.codehaus.jackson.map.ObjectMapper; |
|
|
|
|
import org.codehaus.jackson.map.SerializationConfig; |
|
|
|
|
import org.codehaus.jackson.map.SerializerFactory; |
|
|
|
|
|
|
|
|
|
import org.springframework.util.Assert; |
|
|
|
|
import org.springframework.util.CollectionUtils; |
|
|
|
|
import org.springframework.validation.BindingResult; |
|
|
|
|
import org.springframework.web.servlet.View; |
|
|
|
|
import org.springframework.web.servlet.view.AbstractView; |
|
|
|
|
|
|
|
|
|
import com.fasterxml.jackson.core.util.DefaultPrettyPrinter; |
|
|
|
|
|
|
|
|
|
/** |
|
|
|
|
* Spring MVC {@link View} that renders JSON content by serializing the model for the current request |
|
|
|
|
* using <a href="http://jackson.codehaus.org/">Jackson's</a> {@link ObjectMapper}. |
|
|
|
@ -50,13 +48,15 @@ import com.fasterxml.jackson.core.util.DefaultPrettyPrinter; |
|
|
|
|
* @author Jeremy Grelle |
|
|
|
|
* @author Arjen Poutsma |
|
|
|
|
* @author Rossen Stoyanchev |
|
|
|
|
* @author Juergen Hoeller |
|
|
|
|
* @since 3.0 |
|
|
|
|
* @see org.springframework.http.converter.json.MappingJacksonHttpMessageConverter |
|
|
|
|
*/ |
|
|
|
|
public class MappingJacksonJsonView extends AbstractView { |
|
|
|
|
|
|
|
|
|
/** |
|
|
|
|
* Default content type. Overridable as bean property. |
|
|
|
|
* Default content type: "application/json". |
|
|
|
|
* Overridable through {@link #setContentType}. |
|
|
|
|
*/ |
|
|
|
|
public static final String DEFAULT_CONTENT_TYPE = "application/json"; |
|
|
|
|
|
|
|
|
@ -77,8 +77,9 @@ public class MappingJacksonJsonView extends AbstractView { |
|
|
|
|
|
|
|
|
|
private boolean updateContentLength = false; |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/** |
|
|
|
|
* Construct a new {@code JacksonJsonView}, setting the content type to {@code application/json}. |
|
|
|
|
* Construct a new {@code MappingJacksonJsonView}, setting the content type to {@code application/json}. |
|
|
|
|
*/ |
|
|
|
|
public MappingJacksonJsonView() { |
|
|
|
|
setContentType(DEFAULT_CONTENT_TYPE); |
|
|
|
@ -87,13 +88,11 @@ public class MappingJacksonJsonView extends AbstractView { |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/** |
|
|
|
|
* Sets the {@code ObjectMapper} for this view. |
|
|
|
|
* If not set, a default {@link ObjectMapper#ObjectMapper() ObjectMapper} is used. |
|
|
|
|
* <p>Setting a custom-configured {@code ObjectMapper} is one way to take further control |
|
|
|
|
* of the JSON serialization process. For example, an extended {@link SerializerFactory} |
|
|
|
|
* can be configured that provides custom serializers for specific types. The other option |
|
|
|
|
* for refining the serialization process is to use Jackson's provided annotations on the |
|
|
|
|
* types to be serialized, in which case a custom-configured ObjectMapper is unnecessary. |
|
|
|
|
* Set the {@code ObjectMapper} for this view. |
|
|
|
|
* If not set, a default {@link ObjectMapper#ObjectMapper() ObjectMapper} will be used. |
|
|
|
|
* <p>Setting a custom-configured {@code ObjectMapper} is one way to take further control of |
|
|
|
|
* the JSON serialization process. The other option is to use Jackson's provided annotations |
|
|
|
|
* on the types to be serialized, in which case a custom-configured ObjectMapper is unnecessary. |
|
|
|
|
*/ |
|
|
|
|
public void setObjectMapper(ObjectMapper objectMapper) { |
|
|
|
|
Assert.notNull(objectMapper, "'objectMapper' must not be null"); |
|
|
|
@ -101,14 +100,15 @@ public class MappingJacksonJsonView extends AbstractView { |
|
|
|
|
configurePrettyPrint(); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
private void configurePrettyPrint() { |
|
|
|
|
if (this.prettyPrint != null) { |
|
|
|
|
this.objectMapper.configure(SerializationConfig.Feature.INDENT_OUTPUT, this.prettyPrint); |
|
|
|
|
} |
|
|
|
|
/** |
|
|
|
|
* Return the {@code ObjectMapper} for this view. |
|
|
|
|
*/ |
|
|
|
|
public final ObjectMapper getObjectMapper() { |
|
|
|
|
return this.objectMapper; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/** |
|
|
|
|
* Set the {@code JsonEncoding} for this converter. |
|
|
|
|
* Set the {@code JsonEncoding} for this view. |
|
|
|
|
* By default, {@linkplain JsonEncoding#UTF8 UTF-8} is used. |
|
|
|
|
*/ |
|
|
|
|
public void setEncoding(JsonEncoding encoding) { |
|
|
|
@ -116,9 +116,16 @@ public class MappingJacksonJsonView extends AbstractView { |
|
|
|
|
this.encoding = encoding; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/** |
|
|
|
|
* Return the {@code JsonEncoding} for this view. |
|
|
|
|
*/ |
|
|
|
|
public final JsonEncoding getEncoding() { |
|
|
|
|
return this.encoding; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/** |
|
|
|
|
* Indicates whether the JSON output by this view should be prefixed with <tt>"{} && "</tt>. |
|
|
|
|
* Default is false. |
|
|
|
|
* Default is {@code false}. |
|
|
|
|
* <p>Prefixing the JSON string in this manner is used to help prevent JSON Hijacking. |
|
|
|
|
* The prefix renders the string syntactically invalid as a script so that it cannot be hijacked. |
|
|
|
|
* This prefix does not affect the evaluation of JSON, but if JSON validation is performed |
|
|
|
@ -129,12 +136,11 @@ public class MappingJacksonJsonView extends AbstractView { |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/** |
|
|
|
|
* Whether to use the {@link DefaultPrettyPrinter} when writing JSON. |
|
|
|
|
* Whether to use the default pretty printer when writing JSON. |
|
|
|
|
* This is a shortcut for setting up an {@code ObjectMapper} as follows: |
|
|
|
|
* <pre> |
|
|
|
|
* ObjectMapper mapper = new ObjectMapper(); |
|
|
|
|
* mapper.configure(SerializationConfig.Feature.INDENT_OUTPUT, true); |
|
|
|
|
* converter.setObjectMapper(mapper); |
|
|
|
|
* </pre> |
|
|
|
|
* <p>The default value is {@code false}. |
|
|
|
|
*/ |
|
|
|
@ -143,6 +149,12 @@ public class MappingJacksonJsonView extends AbstractView { |
|
|
|
|
configurePrettyPrint(); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
private void configurePrettyPrint() { |
|
|
|
|
if (this.prettyPrint != null) { |
|
|
|
|
this.objectMapper.configure(SerializationConfig.Feature.INDENT_OUTPUT, this.prettyPrint); |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/** |
|
|
|
|
* Set the attribute in the model that should be rendered by this view. |
|
|
|
|
* When set, all other model attributes will be ignored. |
|
|
|
@ -162,7 +174,7 @@ public class MappingJacksonJsonView extends AbstractView { |
|
|
|
|
/** |
|
|
|
|
* Return the attributes in the model that should be rendered by this view. |
|
|
|
|
*/ |
|
|
|
|
public Set<String> getModelKeys() { |
|
|
|
|
public final Set<String> getModelKeys() { |
|
|
|
|
return this.modelKeys; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
@ -181,7 +193,7 @@ public class MappingJacksonJsonView extends AbstractView { |
|
|
|
|
* @deprecated use {@link #getModelKeys()} instead |
|
|
|
|
*/ |
|
|
|
|
@Deprecated |
|
|
|
|
public Set<String> getRenderedAttributes() { |
|
|
|
|
public final Set<String> getRenderedAttributes() { |
|
|
|
|
return this.modelKeys; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
@ -230,34 +242,21 @@ public class MappingJacksonJsonView extends AbstractView { |
|
|
|
|
protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request, |
|
|
|
|
HttpServletResponse response) throws Exception { |
|
|
|
|
|
|
|
|
|
OutputStream stream = this.updateContentLength ? createTemporaryOutputStream() : response.getOutputStream(); |
|
|
|
|
|
|
|
|
|
OutputStream stream = (this.updateContentLength ? createTemporaryOutputStream() : response.getOutputStream()); |
|
|
|
|
Object value = filterModel(model); |
|
|
|
|
JsonGenerator generator = this.objectMapper.getJsonFactory().createJsonGenerator(stream, this.encoding); |
|
|
|
|
|
|
|
|
|
// A workaround for JsonGenerators not applying serialization features
|
|
|
|
|
// https://github.com/FasterXML/jackson-databind/issues/12
|
|
|
|
|
if (this.objectMapper.getSerializationConfig().isEnabled(SerializationConfig.Feature.INDENT_OUTPUT)) { |
|
|
|
|
generator.useDefaultPrettyPrinter(); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
if (this.prefixJson) { |
|
|
|
|
generator.writeRaw("{} && "); |
|
|
|
|
} |
|
|
|
|
this.objectMapper.writeValue(generator, value); |
|
|
|
|
|
|
|
|
|
writeContent(stream, value, this.prefixJson); |
|
|
|
|
if (this.updateContentLength) { |
|
|
|
|
writeToResponse(response, (ByteArrayOutputStream) stream); |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/** |
|
|
|
|
* Filters out undesired attributes from the given model. |
|
|
|
|
* Filter out undesired attributes from the given model. |
|
|
|
|
* The return value can be either another {@link Map} or a single value object. |
|
|
|
|
* <p>The default implementation removes {@link BindingResult} instances and entries |
|
|
|
|
* not included in the {@link #setRenderedAttributes renderedAttributes} property. |
|
|
|
|
* @param model the model, as passed on to {@link #renderMergedOutputModel} |
|
|
|
|
* @return the object to be rendered |
|
|
|
|
* @return the value to be rendered |
|
|
|
|
*/ |
|
|
|
|
protected Object filterModel(Map<String, Object> model) { |
|
|
|
|
Map<String, Object> result = new HashMap<String, Object>(model.size()); |
|
|
|
@ -270,4 +269,27 @@ public class MappingJacksonJsonView extends AbstractView { |
|
|
|
|
return (this.extractValueFromSingleKeyModel && result.size() == 1 ? result.values().iterator().next() : result); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/** |
|
|
|
|
* Write the actual JSON content to the stream. |
|
|
|
|
* @param stream the output stream to use |
|
|
|
|
* @param value the value to be rendered, as returned from {@link #filterModel} |
|
|
|
|
* @param prefixJson whether the JSON output by this view should be prefixed |
|
|
|
|
* with <tt>"{} && "</tt> (as indicated through {@link #setPrefixJson}) |
|
|
|
|
* @throws IOException if writing failed |
|
|
|
|
*/ |
|
|
|
|
protected void writeContent(OutputStream stream, Object value, boolean prefixJson) throws IOException { |
|
|
|
|
JsonGenerator generator = this.objectMapper.getJsonFactory().createJsonGenerator(stream, this.encoding); |
|
|
|
|
|
|
|
|
|
// A workaround for JsonGenerators not applying serialization features
|
|
|
|
|
// https://github.com/FasterXML/jackson-databind/issues/12
|
|
|
|
|
if (this.objectMapper.getSerializationConfig().isEnabled(SerializationConfig.Feature.INDENT_OUTPUT)) { |
|
|
|
|
generator.useDefaultPrettyPrinter(); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
if (prefixJson) { |
|
|
|
|
generator.writeRaw("{} && "); |
|
|
|
|
} |
|
|
|
|
this.objectMapper.writeValue(generator, value); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
} |
|
|
|
|