如何对List集合中的对象进行按某个属性排序

我们在实际的开发工作中,经常会碰到排序的问题,如题,我们如何针对List集合中的某一个属性进行排序

首先用你要排序的类实现Comparable接口重写compareTo

public class SortParam implements Comparable<SortParam>{
    //字段名
    private String colName;
    //别名
    private String asName;
    //排序方式 ASC/DESC
    private String sortType;
    //排序顺序  排序字段优先级
    private Integer sortNumber;

    public SortParam(String colName, String asName, String sortType, Integer sortNumber) {
        this.colName = colName;
        this.asName = asName;
        this.sortType = sortType;
        this.sortNumber = sortNumber;
    }

    public Integer getSortNumber() {
        return sortNumber;
    }

    public void setSortNumber(Integer sortNumber) {
        this.sortNumber = sortNumber;
    }

    public SortParam(String colName, String asName, String sortType) {
        this.colName = colName;
        this.asName = asName;
        this.sortType = sortType;
    }

    public SortParam() {
    }

    public String getColName() {
        return colName;
    }

    public void setColName(String colName) {
        this.colName = colName;
    }

    public String getAsName() {
        return asName;
    }

    public void setAsName(String asName) {
        this.asName = asName;
    }

    public String getSortType() {
        return sortType;
    }

    public void setSortType(String sortType) {
        this.sortType = sortType;
    }

    @Override
    public int compareTo(SortParam o) {
        return this.sortNumber.compareTo(o.getSortNumber());
    }

然后直接调用排序工具类即可

 Collections.sort(sortList);