[JAVA]用Java实现的各种排序

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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; |;P^clS3
} 8xgJSk
int i1=l; q]^,vei
int i2=mid+1; 91up^
for(int cur=l;cur<=r;cur++){ x;u~NKy
if(i1==mid+1) &Yp+k}XU
data[cur]=temp[i2++]; 14H'!$
else if(i2>r) nbGoJC:U
data[cur]=temp[i1++]; rvic%bsk
else if(temp[i1] data[cur]=temp[i1++]; Ikj=`,a2B
else *g1L$FBG
data[cur]=temp[i2++]; dK.R[aQ
} 6xarYh(
} ASW4,%cl
ivfXat-
} cC%j!8!
jYWw.g<
改进后的归并排序: xO7Yt l
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package org.rut.util.algorithm.support; p1D()-
9? 2
import org.rut.util.algorithm.SortUtil; lUv=7" [
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/** lkA^\+Ct
* @author treeroot @`wn<%o$
* @since 2006-2-2 OV[`|<C '
* @version 1.0 ?Ko|dmX
*/ gg[9u-
public class ImprovedMergeSort implements SortUtil.Sort { |3;(~a)%
p<KIF>rf|
private static final int THRESHOLD = 10; -`7$Qu2
zDDK
/* P16YS8$
* (non-Javadoc) )~V}oKk0t
* _A 2Lv]vfV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jWvtv ng
*/ JrDHRIkgm
public void sort(int[] data) { B3mS]
int[] temp=new int[data.length]; Uk,g> LG
mergeSort(data,temp,0,data.length-1); LkBZlh_
} #~k[6YR 0
6tn+m54_
private void mergeSort(int[] data, int[] temp, int l, int r) { sTkkM9
int i, j, k; /L&M,OUcr.
int mid = (l + r) / 2; X|b2c+I
if (l == r) Oz{%k#X-
return; Qz+sT6js-
if ((mid - l) >= THRESHOLD) NZk&JND
mergeSort(data, temp, l, mid); )KY:m |Z
else g9KTn4
insertSort(data, l, mid - l + 1); aMTFW_w
if ((r - mid) > THRESHOLD) ^Kqf~yS%
mergeSort(data, temp, mid + 1, r); sDC*J\X
else eA=WGy@IcN
insertSort(data, mid + 1, r - mid); YEv Lhh
k_aW
for (i = l; i <= mid; i++) { DM),|Nq"
temp = data; c?K~/bx.
} 40#9]=;}
for (j = 1; j <= r - mid; j++) { SEM8`lnu
temp[r - j + 1] = data[j + mid]; 5HKW"=5Cf
} .Evy_o\^
int a = temp[l]; 6~8F!b2
int b = temp[r]; eLfvMPVo
for (i = l, j = r, k = l; k <= r; k++) { JA^v
if (a < b) { 7I}P*%(f
data[k] = temp[i++]; #BY`h~&T
a = temp; ``|AgIg
} else { 6/tI8H3E
data[k] = temp[j--]; SfB8!V|;
b = temp[j]; m"d/b~q
} i]o"_=C
} W7=V{}b+
} 2YOKM#N]
s_ bR]G
/** DlTR|(AL
* @param data w?LrJ37u
* @param l *:hyY!x
* @param i mfom=-q3k
*/ Dl C@fZD
private void insertSort(int[] data, int start, int len) { ".U^ifF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); riCV&0"n
} WE6\dhJ<
} }Ln@R~[
} ,gx)w^WTm
} 3[IJhR[
#0"~G][#
堆排序： +(?>-3_z
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package org.rut.util.algorithm.support; kV&9`c+
!HK^AwNY
import org.rut.util.algorithm.SortUtil; u[oUCTY
h#qN+qt}
/** OqUr9?+
* @author treeroot F{m{d?:OA
* @since 2006-2-2 < <Y}~N
* @version 1.0 CN&
*/ *>q/WLR
public class HeapSort implements SortUtil.Sort{ sZhMa>
^3]UZ@
/* (non-Javadoc) @f1*eo5f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V[;M&=,"
*/ y\c"b-lQX
public void sort(int[] data) { pz|'l:v^
MaxHeap h=new MaxHeap(); E JK0
h.init(data); #8h;Bj
for(int i=0;i h.remove(); r8/l P}(F
System.arraycopy(h.queue,1,data,0,data.length); aM=D84@
} FjFMR 63
Di5(9]o2
private static class MaxHeap{ [A2`]CE<@
(Ddp|a"b
void init(int[] data){ .12aUXo(
this.queue=new int[data.length+1]; </"4 zD|
for(int i=0;i queue[++size]=data; $_;e>*+x
fixUp(size); 1wj:aD?g
} If-_?wZe
} 1zxq^BI
0CExY9@Wq
private int size=0; ~I=Y{iM
O(Jj|Z
private int[] queue; !Ng=Yk>3
~P*4V]L^
public int get() { =8{WZCW5
return queue[1]; +A8j@d#:
} MGpt}|t-
;#/@+4@a&
public void remove() { G$M9=@Ug
SortUtil.swap(queue,1,size--); 'lz"2@4{
fixDown(1); kOL'|GgK
} DKL@wr}8
file://fixdown +IFw_3$
private void fixDown(int k) { /=?x{(B>
int j; q2aYEuu,
while ((j = k << 1) <= size) { N)2f7j4C&
if (j < size %26amp;%26amp; queue[j] j++; Z.PBu|Kx
if (queue[k]>queue[j]) file://不用交换 *fMpZ+;[m
break; AyKMhac
SortUtil.swap(queue,j,k); NAC_pM&B
k = j; p=Q0!!_r
} TUK"nKSZ`.
} ,:2'YB
private void fixUp(int k) { =+:{P?*}
while (k > 1) { :mppv8bh
int j = k >> 1; -Z-f1.Dm5
if (queue[j]>queue[k]) )u%je~Vw
break; 8IQtz2
SortUtil.swap(queue,j,k); A7_4.VH
k = j; 9A'Y4Kg<C
} ?%tMohL
} 2B0W~x2=
/phX'xp
} thlY0XCq,%
;|T!#@j
} &)d$t'7p
VosZJv=
SortUtil： f|7\DeY9U
#N(= 3Cj
package org.rut.util.algorithm; \>. LW9
!|hoYU>@2L
import org.rut.util.algorithm.support.BubbleSort; "I6P=]|b
import org.rut.util.algorithm.support.HeapSort; /*FH:T<V
import org.rut.util.algorithm.support.ImprovedMergeSort; uA tV".
import org.rut.util.algorithm.support.ImprovedQuickSort; d[^KL;b?6
import org.rut.util.algorithm.support.InsertSort; z4%uN|V
import org.rut.util.algorithm.support.MergeSort; ipnV$!z
import org.rut.util.algorithm.support.QuickSort; H9XvO
import org.rut.util.algorithm.support.SelectionSort; ~/pzxo$
import org.rut.util.algorithm.support.ShellSort; Qd_6)M-
Kb#4ILA
/** S^@S%Eg
* @author treeroot !^#jwRpeN
* @since 2006-2-2 .T<=z
* @version 1.0 3981ie
*/ VZr>U*J[:
public class SortUtil { {Bs~lC$
public final static int INSERT = 1; ia&AW
public final static int BUBBLE = 2; ?lGG|9J\
public final static int SELECTION = 3; F_iXd/
public final static int SHELL = 4; -&x2&WE'
public final static int QUICK = 5; 1/1Xk,E
public final static int IMPROVED_QUICK = 6; 'VyM{:8
public final static int MERGE = 7; {'sY|lou
public final static int IMPROVED_MERGE = 8; bK"SKV
public final static int HEAP = 9; i$G;f^Z!Y
( 9!k#
public static void sort(int[] data) { H`bSYjgM!
sort(data, IMPROVED_QUICK); K%<j=c
} EKEjv|_)
private static String[] name={ $EZN1\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _ nA p6i
}; k(>h^
omO S=d!o
private static Sort[] impl=new Sort[]{ FuG4F
new InsertSort(), .;y#
new BubbleSort(), }jt?|dl1
new SelectionSort(), yzw mT
new ShellSort(), ]xC#rwHUC
new QuickSort(), Ac2(O6
new ImprovedQuickSort(), <?-YTY|
new MergeSort(), w{[=l6L m
new ImprovedMergeSort(), 4%4avEa"w
new HeapSort() (fNUj4[
}; Wt)Drv{@ {
;AR{@Fu.
public static String toString(int algorithm){ ~\,w {
return name[algorithm-1]; D0k 8^
} e0@6Pd
n55Pv3}C
public static void sort(int[] data, int algorithm) { v(*C%.M)
impl[algorithm-1].sort(data); 9CA^B2u
} f.aSKQD
#_lt~^6
public static interface Sort { C{sLz9
public void sort(int[] data); S(S#
} /MY9 >
=PRx?q`d
public static void swap(int[] data, int i, int j) { S)QAXjH
int temp = data; ;Op3?_
data = data[j]; +4[^!q* H
data[j] = temp; s2?T5oWU
} /V3=KY`_J
} F:*W5xX