expression EL表达式

项目地址：go-expression

目前发布初始版本，欢迎体验。

Install

go get github.com/heartlhj/go-expression  

功能

• 字符串的提取和比较

 context := spel.StandardEvaluationContext{}  m := make(map[string]interface{})  m["name"] = "lisi"  m["age"] = 18  context.SetVariables(m)  parser := SpelExpressionParser{}  expressionString := "#name=='lisi'" //expressionString := "#name" //返回lisi  valueContext := parser.ParseExpression(expressionString).GetValueContext(&context) 

• 数字比较，支持int和 float64

 context := spel.StandardEvaluationContext{}  m := make(map[string]interface{})  m["name"] = "lisi"  m["age"] = 18  context.SetVariables(m)  parser := SpelExpressionParser{}  expressionString := "#age>=10"  valueContext := parser.ParseExpression(expressionString).GetValueContext(&context) 

float64比较

    context := spel.StandardEvaluationContext{}  m := make(map[string]interface{}) var ageFloat float64  ageFloat = 10  m["num"] = ageFloat  context.SetVariables(m)  parser := SpelExpressionParser{}  expressionString := "#num>=9f"  valueContext := parser.ParseExpression(expressionString).GetValueContext(&context) 

• 与（&&）或 （||）操作

    context := spel.StandardEvaluationContext{}  m := make(map[string]interface{})  m["name"] = "lisi"  m["age"] = 18  context.SetVariables(m)  parser := SpelExpressionParser{}  expressionString := "#name=='lisi' && #age>=3"  valueContext := parser.ParseExpression(expressionString).GetValueContext(&context) 

• 复合结构，迭代提取

 context := spel.StandardEvaluationContext{}  context.AddPropertyAccessor(spel.MapAccessor{})  m := make(map[string]interface{})  m["name"] = "lisi"  m["age"] = 18  m1 := make(map[string]interface{})  m2 := make(map[string]interface{})  m2["num"] = 12  m1["code"] = m2  m["order"] = m1  context.SetVariables(m)  parser := SpelExpressionParser{}  expressionString := "#order.code.num==12"  valueContext := parser.ParseExpression(expressionString).GetValueContext(&context) 

• 数组和切片提取

 context := spel.StandardEvaluationContext{}  context.AddPropertyAccessor(spel.MapAccessor{})  m := make(map[string]interface{})  m["name"] = "lisi"  m["age"] = 18  m1 := make(map[string]interface{}) //切片 //orders := make([]Order, 2) //数组  orders := [2]Order{}  orders[0] = Order{name: "lisi", age: 12}  orders[1] = Order{name: "wang", age: 24}  m1["code"] = orders  m["order"] = m1  context.SetVariables(m)  parser := SpelExpressionParser{}  expressionString := "#order.code[0].name=='lisi'"  valueContext := parser.ParseExpression(expressionString).GetValueContext(&context)