[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; J^t=.-a|
} e3(0L I
int i1=l; UejG$JyHP
int i2=mid+1; lg!1q8
for(int cur=l;cur<=r;cur++){ G&3j/5V
if(i1==mid+1) !gT6So
data[cur]=temp[i2++]; TOBAh.1
else if(i2>r) ~t#'X8.)
data[cur]=temp[i1++]; ?V7[,I1?
else if(temp[i1] data[cur]=temp[i1++]; 59EAqz[:
else c6?5?_ne
data[cur]=temp[i2++]; Z?v9ub~%
} m{V@Om
} | sQ5`lV?
VQ}=7oe%q
} 8PQ$X2)
I7[+:?2
改进后的归并排序: 7Y!^88,f.
"CZ`hx1|^
package org.rut.util.algorithm.support; y ruN5
>,~JQ%1
import org.rut.util.algorithm.SortUtil; pq4+n'uO
if`/LJsa
/** !XtbZ-
* @author treeroot Qs,LK(1
* @since 2006-2-2 (:hPT-1
* @version 1.0 k@wT,?kD
*/ 3w^q0/GD
public class ImprovedMergeSort implements SortUtil.Sort { I/Vlw-
^U`[P@T
private static final int THRESHOLD = 10; UO!OO&l!
gzC\6ca
/* SJy?^
* (non-Javadoc) -6
* _`;6'}]s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZNuyGo;
*/ ,:,c kul
public void sort(int[] data) { ]jy6C'Mp
int[] temp=new int[data.length]; 40:YJ_n
mergeSort(data,temp,0,data.length-1); %*/?k~53
} ^K;,,s;0
S&R~*
private void mergeSort(int[] data, int[] temp, int l, int r) { ~xXB !K~C
int i, j, k; 5))?,YkrrI
int mid = (l + r) / 2; [u-~<80
if (l == r) &[kwM395
return; *1>XlVx,
if ((mid - l) >= THRESHOLD) fEgZ/p!g
mergeSort(data, temp, l, mid); D6v0n6w
else O'!k$iJNb
insertSort(data, l, mid - l + 1); ,ciNoP*-~%
if ((r - mid) > THRESHOLD) qWP1i7]=/
mergeSort(data, temp, mid + 1, r); Nzr zLK
else N"2@yaN
insertSort(data, mid + 1, r - mid); r]8B6iV
IOfo]p-
for (i = l; i <= mid; i++) { H]}- U8}sp
temp = data; dnN"
} Mg;;o
for (j = 1; j <= r - mid; j++) { <'s1+^LC
temp[r - j + 1] = data[j + mid]; [#14atv
} > m5j.GP;
int a = temp[l]; ch< zpo:
int b = temp[r]; .Sb|+[{
for (i = l, j = r, k = l; k <= r; k++) { 4;j#7
if (a < b) { G\Sd!'?p
data[k] = temp[i++]; +z9;BPw%
a = temp; SXgpj
} else { =D3Y q?
data[k] = temp[j--]; bz<wihZj
b = temp[j]; 2{{M{#}S.
} Ij4\*D!
} ;/e!!P]jP
} *A8CJ
s7&%_!4
/** (o e;pa
* @param data )Oa"B;\j
* @param l DhB:8/J
* @param i |!&,etu
*/ <G6wpf8M
private void insertSort(int[] data, int start, int len) { 17nWrTxR$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )_+#yaC
} {!E<hQ2<$9
} XFd[>U<X
} sPbtv[bC
} +mAMCM2N
M0_K%Z(zaR
堆排序： fzSZ>I0R
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package org.rut.util.algorithm.support; b_][Jye&P
ZXr]V'Q?
import org.rut.util.algorithm.SortUtil; `[Lap=.'.
U:8^>_
/** UVU}
* @author treeroot qf7.Sh
* @since 2006-2-2 (<1DPpy95O
* @version 1.0 r+ vtKb
*/ >"ZTyrK
public class HeapSort implements SortUtil.Sort{ WhK?>u
|a'Q^aT
/* (non-Javadoc) =m-_0xo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mflI>J=g
*/ i 0L7`TB
public void sort(int[] data) { \ fwf\&
MaxHeap h=new MaxHeap(); 9:@os0^O
h.init(data); >)5rOU
for(int i=0;i h.remove(); Kji}2j'a
System.arraycopy(h.queue,1,data,0,data.length); 6x -PGq
} Sw(%j1uL
*~fN^{B'!
private static class MaxHeap{ yv'mV=BMJ!
v[lytX4)
void init(int[] data){ sW=@G'}3
this.queue=new int[data.length+1]; q2,@>#
for(int i=0;i queue[++size]=data; \ iP[iE=
fixUp(size); L.|GC7$0
} $SXF>n{}
} iUl{_vb
gqe z-
private int size=0; 3V,X=
GWP"i77y0s
private int[] queue; 8uCd|dJ
dQizM^j
public int get() { Mzb_o2^(
return queue[1]; d2(eX\56Z
} {CGk5`g~
-Fl3m
public void remove() { %%-kUe
SortUtil.swap(queue,1,size--); =z@'vu$Fh
fixDown(1); Jg%sl&65
} 8zpK;+
file://fixdown V-X n&s
private void fixDown(int k) { dxASU|Yo9
int j; VUx~Y'b
while ((j = k << 1) <= size) { fA+M/}=
if (j < size %26amp;%26amp; queue[j] j++; WG^D$L:
if (queue[k]>queue[j]) file://不用交换 $G=\i>R.
break; `|PxEif+J
SortUtil.swap(queue,j,k); v}cm-_*v
k = j; eueXklpg+
} DO%YOv
} P-vA.7
private void fixUp(int k) { xw?G?(WO
while (k > 1) { tG#F7%+E
int j = k >> 1; neZ_TT/3K
if (queue[j]>queue[k]) fnXl60C%
break; i!Ne<Q
SortUtil.swap(queue,j,k); :F<a~_k
k = j; 9xu&n%L=
} |kVxrq
} c=| a\\
mKn[>M1
} 1 9)78kV{
{O"dj;RU
} 16aaIK
1}'Jbj"/
SortUtil： %%DK?{jo`
S[ 2`7'XV
package org.rut.util.algorithm; "#JoB X@yE
LLU>c]a
import org.rut.util.algorithm.support.BubbleSort; :Mt/6}
import org.rut.util.algorithm.support.HeapSort; z&-`<uV~
import org.rut.util.algorithm.support.ImprovedMergeSort; -,+JE0[
import org.rut.util.algorithm.support.ImprovedQuickSort; 0\gE^=o[
import org.rut.util.algorithm.support.InsertSort; |Z"hq
import org.rut.util.algorithm.support.MergeSort; DSnsi@Mi
import org.rut.util.algorithm.support.QuickSort; +B&FZ4'
import org.rut.util.algorithm.support.SelectionSort; Rdv"Aj:
import org.rut.util.algorithm.support.ShellSort; @yek6E&9
XM_S"
/** 5 WAsEP
* @author treeroot km3-Hp1
* @since 2006-2-2 $[1 M2>[
* @version 1.0 _e-a>y
*/ Z`:V~8=l
public class SortUtil { fmSA.z
public final static int INSERT = 1; )c!f J7o:
public final static int BUBBLE = 2; xt-;7
public final static int SELECTION = 3; &2[OH}4
public final static int SHELL = 4; hRTw8-wy:
public final static int QUICK = 5; 5xe}ljo
public final static int IMPROVED_QUICK = 6; G vMhgG=D
public final static int MERGE = 7; S0\QZ/je
public final static int IMPROVED_MERGE = 8; 42E]&=Cet
public final static int HEAP = 9; Bee`Pp2
2%UzCK
public static void sort(int[] data) { fTd=}zY
sort(data, IMPROVED_QUICK); \=PnC}7I
} IHHL. gT
private static String[] name={ V:HxRMF2X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ")m0{
}; 2#LTd{
W5 ^eCYHoi
private static Sort[] impl=new Sort[]{ %0l'Nuz
new InsertSort(), ){^o"A?-:
new BubbleSort(), 5<ZE.'O
new SelectionSort(), ci*rem
new ShellSort(), xa#;<8 iV
new QuickSort(), "=<T8M
new ImprovedQuickSort(), 0N.B=j|
new MergeSort(), 0Cd)w4C
new ImprovedMergeSort(), 3NU{7,F
new HeapSort() >tc#Ofgzd
}; |j:"n3~6
zA/tHlKc
public static String toString(int algorithm){ r,I';vm<`
return name[algorithm-1]; [Z~h!}
} DmzK* O{
,5}%_
public static void sort(int[] data, int algorithm) { *-Y`7=^$
impl[algorithm-1].sort(data); Wk<heF
} b7-M'-Km0_
|Z6M?n
public static interface Sort { Q8-;w{%
public void sort(int[] data); EHI%QT
} Z*uv~0a>9Q
u}_,4J
public static void swap(int[] data, int i, int j) { HK}br!?
int temp = data; xib?XzxGo
data = data[j]; =Q+i(UGHi
data[j] = temp; rdj_3Utv
} S7oPdzcU-
} {"kEu