Handle malformed JSON more consistently

Closes gh-31301

Author: wilkinsona

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/json/BasicJsonParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -39,12 +39,12 @@ public class BasicJsonParser extends AbstractJsonParser {
 
 	@Override
 	public Map<String, Object> parseMap(String json) {
-		return parseMap(json, this::parseMapInternal);
+		return tryParse(() -> parseMap(json, this::parseMapInternal), Exception.class);
 	}
 
 	@Override
 	public List<Object> parseList(String json) {
-		return parseList(json, this::parseListInternal);
+		return tryParse(() -> parseList(json, this::parseListInternal), Exception.class);
 	}
 
 	private List<Object> parseListInternal(String json) {

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/json/GsonJsonParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -41,12 +41,14 @@ public class GsonJsonParser extends AbstractJsonParser {
 
 	@Override
 	public Map<String, Object> parseMap(String json) {
-		return parseMap(json, (trimmed) -> this.gson.fromJson(trimmed, MAP_TYPE.getType()));
+		return tryParse(() -> parseMap(json, (trimmed) -> this.gson.fromJson(trimmed, MAP_TYPE.getType())),
+				Exception.class);
 	}
 
 	@Override
 	public List<Object> parseList(String json) {
-		return parseList(json, (trimmed) -> this.gson.fromJson(trimmed, LIST_TYPE.getType()));
+		return tryParse(() -> parseList(json, (trimmed) -> this.gson.fromJson(trimmed, LIST_TYPE.getType())),
+				Exception.class);
 	}
 
 	private static final class MapTypeToken extends TypeToken<Map<String, Object>> {

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/AbstractJsonParserTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -175,4 +175,15 @@ void escapeDoubleQuote() {
 		assertThat(map.get("foo")).isEqualTo("\"bar\"");
 	}
 
+	@Test
+	void listWithMalformedMap() {
+		assertThatExceptionOfType(JsonParseException.class)
+				.isThrownBy(() -> this.parser.parseList("[tru,erqett,{\"foo\":fatrue,true,true,true,tr''ue}]"));
+	}
+
+	@Test
+	void mapWithKeyAndNoValue() {
+		assertThatExceptionOfType(JsonParseException.class).isThrownBy(() -> this.parser.parseMap("{\"foo\"}"));
+	}
+
 }

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/YamlJsonParserTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -16,6 +16,7 @@
 
 package org.springframework.boot.json;
 
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.yaml.snakeyaml.constructor.ConstructorException;
 
@@ -40,4 +41,16 @@ void customTypesAreNotLoaded() {
 				.withCauseInstanceOf(IllegalStateException.class);
 	}
 
+	@Test
+	@Override
+	@Disabled("SnakeYaml does not fail when a map is malformed")
+	void listWithMalformedMap() {
+	}
+
+	@Test
+	@Override
+	@Disabled("SnakeYaml does not fail when a map has a key with no value")
+	void mapWithKeyAndNoValue() {
+	}
+
 }