反射对效率有影响 慎用！！！
1.对象结构
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public class BusinessDept { private String year; //年 private String month; //月 private String deptName; //部门名称 private String deptLeader; //部门负责人 private Double jyz; //经营值 private Double rev; //收入 private Double exp; //支出 private Double tWorkTime; //填报工时 private Double sWorkTime; //标准工时 private Double param; //经营参数
public void setYear(String year) { this .year = year; }
public void setMonth(String month) { this .month = month; }
public void setDeptName(String deptName) { this .deptName = deptName; }
public void setDeptLeader(String deptLeader) { this .deptLeader = deptLeader; }
public void setJyz(Double jyz) { this .jyz = jyz; }
public String getYear() { return year; }
public String getMonth() { return month; }
public String getDeptName() { return deptName; }
public String getDeptLeader() { return deptLeader; }
public Double getJyz() { return jyz; }
public Double getRev() { return rev; }
public Double getExp() { return exp; }
public Double gettWorkTime() { return tWorkTime; }
public Double getsWorkTime() { return sWorkTime; }
public Double getParam() { return param; }
public void setRev(Double rev) { this .rev = rev; }
public void setExp(Double exp) { this .exp = exp; }
public void settWorkTime(Double tWorkTime) { this .tWorkTime = tWorkTime; }
public void setsWorkTime(Double sWorkTime) { this .sWorkTime = sWorkTime; }
public void setParam(Double param) { this .param = param; }
public <E> E get(String name) { Class cl = this .getClass();
Field[] fields = cl.getDeclaredFields(); try { for (Field field : fields) { field.setAccessible( true ); if (field.getName().equals(name)) { return (E) field.get( this ); } } } catch (IllegalAccessException e) { e.printStackTrace(); } return null ; } } |
2.根据字段名获取value
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public <E> E get(String name) { Class cl = this .getClass();
Field[] fields = cl.getDeclaredFields(); try { for (Field field : fields) { field.setAccessible( true ); if (field.getName().equals(name)) { return (E) field.get( this ); } } } catch (IllegalAccessException e) { e.printStackTrace(); } return null ; } |
3.对list过滤
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List businessDeptList = this .myQuery(); //筛选符合条件的list if (businessDeptList.size()> 0 ){ businessDeptList = this .filterExact( "year" ,year,businessDeptList); businessDeptList = this .filterExact( "month" ,month,businessDeptList); businessDeptList = this .filterVague( "deptName" ,deptName,businessDeptList); businessDeptList = this .filterVague( "deptLeader" ,deptLeader,businessDeptList); if (!StringUtils.isEmpty(jyz)){ businessDeptList = this .filterExact( "jyz" ,Double.parseDouble(jyz),businessDeptList); } if (!StringUtils.isEmpty(param)){ businessDeptList = this .filterExact( "param" ,Double.parseDouble(param),businessDeptList); } if (!StringUtils.isEmpty(sWorkTime)){ businessDeptList = this .filterExact( "sWorkTime" ,Double.parseDouble(sWorkTime),businessDeptList); } if (!StringUtils.isEmpty(rev)){ businessDeptList = this .filterExact( "rev" ,Double.parseDouble(rev),businessDeptList); } if (!StringUtils.isEmpty(exp)){ businessDeptList = this .filterExact( "exp" ,Double.parseDouble(exp),businessDeptList); } if (!StringUtils.isEmpty(tWorkTime)){ businessDeptList = this .filterExact( "tWorkTime" ,Double.parseDouble(tWorkTime),businessDeptList); }
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4.精确匹配
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//精确匹配 private <T>List<BusinessDept> filterExact(String name,T t,List<BusinessDept> businessDepts){ if (t.toString().isEmpty()){ return businessDepts; } List<BusinessDept> list = new ArrayList<BusinessDept>(); if (businessDepts.size()> 0 ){ for ( int i = 0 ;i<businessDepts.size();i++){ if (businessDepts.get(i).get(name).equals(t)){ list.add(businessDepts.get(i)); } } } return list; } |
5.模糊匹配
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//模糊匹配 private List<BusinessDept> filterVague(String name,String s,List<BusinessDept> businessDepts){ if (s.isEmpty()){ return businessDepts; } List<BusinessDept> list = new ArrayList<BusinessDept>(); if (businessDepts.size()> 0 ){ for ( int i = 0 ;i<businessDepts.size();i++){ if (businessDepts.get(i).get(name).toString().contains(s)){ list.add(businessDepts.get(i)); } } } return list; } |
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原文链接：https://blog.51cto.com/u_12040959/5051652
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