自定义StringTemplate字符串模板引擎

1.工具类

package com.lys.util;

import org.apache.commons.lang.text.StrSubstitutor;

import java.util.HashMap;
import java.util.Map;


public class StringTemplate {

    private String template;
    private Map<String, Object> valuesMap;

    public StringTemplate(String template){
        this.template = template;
        this.valuesMap = new HashMap<>();
    }

    public StringTemplate build(String param, Object value){
        this.valuesMap.put(param, value);
        return this;
    }

    public String render(){
        StrSubstitutor sub = new StrSubstitutor(this.valuesMap);
        return sub.replace(this.template);
    }
}

2. 使用方式

StringTemplate sqlTemplate = new StringTemplate("select * from student where  xy=${xy} and zy=${zy} ");
String sql= sqlTemplate 
                .build("xy", "信息学院")
                .build("zy", "软件工程")
                .render();