这次就不帖完整代码了，只说明json 格式以及核心代码调用
json 格式
- 说明
就是一个json 数组,每个rule 的格式参考如下,需要包含name，condition,priority,actions ,description 不是必须的
{ "name": "3", "description": "3", "condition": "user.name.length<50", "priority": 3, "actions": [ "System.out.println(\"default rule3 \")" ]}- 一个参考多个rule 的json 文件
[{ "name": "1", "description": "1", "priority": 1, "compositeRuleType": "UnitRuleGroup", "composingRules": [ { "name": "2", "description": "2", "condition": "user.getAge()<28", "priority": 2, "actions": [ "System.out.println(\"UnitRuleGroup not ok rule2 \")" ] }, { "name": "3", "description": "3", "condition": "user.name.length<10", "priority": 3, "actions": [ "System.out.println(\"UnitRuleGroup rule3 \")" ] }, { "name": "4", "description": "4", "condition": "user.name.length<10", "priority": 4, "actions": [ "System.out.println(\"UnitRuleGroup rule4 \")" ] }, { "name": "5", "description": "5", "condition": "user.name.length<10", "priority": 5, "actions": [ "System.out.println(\"UnitRuleGroup rule5 \");UserService.doAction4(user.userinfo)" ] } ]}, { "name": "3", "description": "3", "condition": "user.name.length<50", "priority": 3, "actions": [ "System.out.println(\"default rule3 \")" ] }]代码引用规则
easy-rules 提供了json 格式的解析
- easy-rules 代码加载
MVELRuleFactory ruleFactory = new MVELRuleFactory(new JsonRuleDefinitionReader());ParserContext context =new ParserContext();context.addImport("UserService", UserService.class);Rules yamlRules = ruleFactory.createRules(new FileReader(Launcher.class.getClassLoader().getResource("json-rule.json").getFile()),context);DefaultRulesEngine rulesEngine = new DefaultRulesEngine();参考资料
https://github.com/j-easy/easy-rules
来源：oschina
链接：https://my.oschina.net/u/4381723/blog/3234340