[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; 2&AX_#P
} F>%,}Y~B:
int i1=l; i=fhK~Jd
int i2=mid+1; wGHVq fm5
for(int cur=l;cur<=r;cur++){ ^a!oq~ZSy
if(i1==mid+1) W4h]4X
data[cur]=temp[i2++]; )_?HBTG
else if(i2>r) `H^ H#W
data[cur]=temp[i1++]; j2 >WHh
else if(temp[i1] data[cur]=temp[i1++]; K;TTGK
else ^lK!tOeO
data[cur]=temp[i2++]; yC!>7@m
} p-7?S^!l
} x'%vL",%
8*uaI7;*
} yDpv+6(a
t6)R37
改进后的归并排序: |;U3pq)
a<((\c_8G
package org.rut.util.algorithm.support; *;lb<uLv
xz7CnW1
import org.rut.util.algorithm.SortUtil; RGY#0.Z}
bPl'?3
/** /u"Iq8QA
* @author treeroot !wro7ilMB
* @since 2006-2-2 jd`]]FAww
* @version 1.0 NG4@L1f%
*/ 7&V3f=aj6
public class ImprovedMergeSort implements SortUtil.Sort { x3jjtjf
ye| 2gH
private static final int THRESHOLD = 10; =Prz|
C"k]U[%{
/* &G3$q,`H
* (non-Javadoc) }UG<_bE|
* +>%AG&Pc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'sk M$jr
*/ ;b_<5S
public void sort(int[] data) { Z_T~2t
int[] temp=new int[data.length]; ^vOEG;TR<-
mergeSort(data,temp,0,data.length-1); 5?E;YyA
} ZCfd<NS?
F5w=tK
private void mergeSort(int[] data, int[] temp, int l, int r) { =knBwjeD
int i, j, k; D2\EpL/
int mid = (l + r) / 2; HDs8M
if (l == r) Yg1HvSw\
return; Z/;8eb*B7
if ((mid - l) >= THRESHOLD) QxBH{TG
mergeSort(data, temp, l, mid); 8PG&/"K
else 1}CJ&
insertSort(data, l, mid - l + 1); u:^9ZQ+
if ((r - mid) > THRESHOLD) X: Be'
mergeSort(data, temp, mid + 1, r); XKT[8o<L
else s-l3_210
insertSort(data, mid + 1, r - mid); C"h7'+Kw
[-#q'S
for (i = l; i <= mid; i++) { _IvqZ/6Y(
temp = data; cZw_^@!
} u$^r(.EV
for (j = 1; j <= r - mid; j++) { :QMpp}G
temp[r - j + 1] = data[j + mid]; 9*CRMkPrd
} Z>W&vDeuN
int a = temp[l]; z7Z!wIzJ
int b = temp[r]; pWb8X}M
for (i = l, j = r, k = l; k <= r; k++) { l!}7GWj
if (a < b) { (IAR-957pN
data[k] = temp[i++]; W:2j.K9!
a = temp; 1.a:iweN
} else { ip*UujmNyR
data[k] = temp[j--]; cs]3Rp^g
b = temp[j]; R~#&xfMd.
} `O?j -zR
} W{kTM4
} [Lf8*U"
4&B|rf
/** y*I,i*iv
* @param data : p7PiqQ
* @param l mxCqN1:#
* @param i ' KNg;
*/ 3X1 U
private void insertSort(int[] data, int start, int len) { h;J%Z!Rjw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Oc/ i'
} F[0w*i&u5
} z+nq<%"'
} SCq3Kh
} 08nA}+k
b.xG'
堆排序： //^{u[lr
Lo +H&-
package org.rut.util.algorithm.support; G-DOI
s09&A]G
import org.rut.util.algorithm.SortUtil; _2<d6@}
x0q`Uc
/** Ntpw(E<$f
* @author treeroot &LhR0A
* @since 2006-2-2 ,{#Li
* @version 1.0 0}$R4<"{Y>
*/ H$xUOqL
public class HeapSort implements SortUtil.Sort{ =K9-
S$nEflcz
/* (non-Javadoc) |<LW(,|A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U{3Pk0rZ
*/ ->@iw!5xu
public void sort(int[] data) { eXtlqU$
MaxHeap h=new MaxHeap(); WAGU|t#."
h.init(data); ET~^P
for(int i=0;i h.remove(); E,|OMK#
System.arraycopy(h.queue,1,data,0,data.length); F^7qr
} s&6/fa
G}'\
private static class MaxHeap{ q>VvXUyK,
3O?[Yhk`.
void init(int[] data){ 51!#m|
this.queue=new int[data.length+1]; <+ckE2j
for(int i=0;i queue[++size]=data; 5Ja[p~^L
fixUp(size); '\Uy;,tu /
} WL<f!
} PE2O$:b\
U~<~>^[
private int size=0; ^W[3RiG
w?M` gl8r
private int[] queue; >jm^MS=
x)e(g}n
public int get() { Xxs0N_va&
return queue[1]; F6 f
} ,<=_t{^
t~ z;G%a
public void remove() { _z&H O
SortUtil.swap(queue,1,size--); m2to94yh
fixDown(1); gg :{Xf*`
} "'U]4Z%q!
file://fixdown ~P+;_
private void fixDown(int k) { iiV'-!3w
int j; DbH'Qs?z
while ((j = k << 1) <= size) { jN sM&s,
if (j < size %26amp;%26amp; queue[j] j++; w#RfD
if (queue[k]>queue[j]) file://不用交换 gPy}.g{tH$
break; !F#^Peb
SortUtil.swap(queue,j,k); eu?DSad
k = j; 42,K8
} 6Zq7O\
} | <- t
private void fixUp(int k) { biAa&
while (k > 1) { nbSu|sX~r5
int j = k >> 1; HmRmZ3~
if (queue[j]>queue[k]) ZgL]ex
break; w(R+p/RF
SortUtil.swap(queue,j,k); Zs}EGC~&
k = j; O|0}m
} -!:h]
} m~vEandm
78FK{Cr
} Cg%}=
w:@W/e*9N
} jg=}l1M"
UJrN+RtL
SortUtil： `:EU~4s\
#:}mi;{
package org.rut.util.algorithm; (Z at|R.F
;%$wA5"2M
import org.rut.util.algorithm.support.BubbleSort; =}YaV@g<f
import org.rut.util.algorithm.support.HeapSort; JS0957K
import org.rut.util.algorithm.support.ImprovedMergeSort; .Wvg{ S-
import org.rut.util.algorithm.support.ImprovedQuickSort; (:ij'Zbz
import org.rut.util.algorithm.support.InsertSort; }1Km h]
import org.rut.util.algorithm.support.MergeSort; c$R<j'7
import org.rut.util.algorithm.support.QuickSort; [knwp$
import org.rut.util.algorithm.support.SelectionSort; U#F(%b-LC
import org.rut.util.algorithm.support.ShellSort; e><,WM,e
^uWj#
/** n.xOu`gj
* @author treeroot t$b{zv9C
* @since 2006-2-2 OT}^dPQe
* @version 1.0 +&8'@v$
*/ RV, cQ K
public class SortUtil { MF.$E?_R
public final static int INSERT = 1; \$D41_Wt|
public final static int BUBBLE = 2; S+//g+e|f
public final static int SELECTION = 3; #l-/!j
public final static int SHELL = 4; ? ]hS^&
public final static int QUICK = 5; (/3E,6gMk^
public final static int IMPROVED_QUICK = 6; 6yXMre)YV
public final static int MERGE = 7; <'z.3@D
public final static int IMPROVED_MERGE = 8; GQ=Pkko
public final static int HEAP = 9; 8Z(\iZ5Rgj
EY'48S
public static void sort(int[] data) { 5tm:|.`SQ
sort(data, IMPROVED_QUICK); -Oc
} NUGiDJ+[
private static String[] name={ &3bhK5P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }n$I #G}\/
}; 84M*)cKR~
WOuk> /
private static Sort[] impl=new Sort[]{ F48W8'un
new InsertSort(), PZO8<d
new BubbleSort(), a #Pr)H
new SelectionSort(), o.KE=zp&z
new ShellSort(), m[6c{$A/w
new QuickSort(), tf?"AY4
new ImprovedQuickSort(), K8|>"c~
new MergeSort(), |bv7N@?e
new ImprovedMergeSort(), \-R\xL
new HeapSort() Z6_E/S
}; nO .:f
K.::P84m;
public static String toString(int algorithm){ 3B[u2o>
return name[algorithm-1]; ;$rh&ET
} %3 VToj@`>
1agI/R
public static void sort(int[] data, int algorithm) { t Ai?Bjo
impl[algorithm-1].sort(data); SoL"M[O
} {xJ<)^fD8
uPBtR
public static interface Sort { =U+_;;F=
public void sort(int[] data); k2ZMDU
} 2, r{zJ8
^F`\B'8MF
public static void swap(int[] data, int i, int j) { lxXIu8
int temp = data; @[w.!GW%
data = data[j]; glgXSOj
data[j] = temp; yu@u0vlc
} 5{O9<~,
} %Y<3v\`_