[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; bK?MT]%}r
} *{Yh6{
int i1=l; K\~v&
int i2=mid+1; ^:+Rg}]W^
for(int cur=l;cur<=r;cur++){ zPHy2H$28
if(i1==mid+1) [#>{4qY2
data[cur]=temp[i2++]; W\%q}q2?
else if(i2>r) ZzT&$J7]`{
data[cur]=temp[i1++]; 8nodV 9
else if(temp[i1] data[cur]=temp[i1++]; )Y~xIj>
else wW^Zb
data[cur]=temp[i2++]; -IbbPuRq
} k},>^qE
} lYP~3wp99
s+'XQs^{aj
} !:dL~n
b#A(*a_gN
改进后的归并排序: Qne0kB5m
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package org.rut.util.algorithm.support; IKo;9|2U
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import org.rut.util.algorithm.SortUtil; J$rJd9t
W~<m[#:6C
/** R2CQXhiJ
* @author treeroot \@8*TS
* @since 2006-2-2 ?d~]Wd!z
* @version 1.0 -w\M-wc/$
*/ ljuNs@q
public class ImprovedMergeSort implements SortUtil.Sort { 1TIlINlJ
Ww=O=c5uOu
private static final int THRESHOLD = 10; %EWq2'/5
:pb67Al29
/* W"|mpxp
* (non-Javadoc) 8?kP*tmcZ
* j3{HkcjJG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mTJ"l(,3
*/ jFG5)t<D
public void sort(int[] data) { EavX8r
int[] temp=new int[data.length]; S*xhX1yUi
mergeSort(data,temp,0,data.length-1); X>{p}vtvf>
} R5gado
>(OYK}ZN
private void mergeSort(int[] data, int[] temp, int l, int r) { HS7_MGU
int i, j, k; Co[n--@C
int mid = (l + r) / 2; Tt%}4{"
if (l == r) -,|ha>r
return; -Uri|^t
if ((mid - l) >= THRESHOLD) ZL=N[XW4'
mergeSort(data, temp, l, mid); -~\f2'Q
else L{<7.?{Y
insertSort(data, l, mid - l + 1); j %H`0
if ((r - mid) > THRESHOLD) <XvYa{t]{
mergeSort(data, temp, mid + 1, r); JtFiFaCxY
else <ZVZ$ZW~D
insertSort(data, mid + 1, r - mid); yhwy>12,K
P:^=m*d
for (i = l; i <= mid; i++) { 7 v~ro
temp = data; nEyIt&>9
} SY|Ez!tU:N
for (j = 1; j <= r - mid; j++) { 6"+8M 3M l
temp[r - j + 1] = data[j + mid]; d/lffNS=
} z&>|*C.Y
int a = temp[l]; UGCox-W"
int b = temp[r]; p1~*;;F
for (i = l, j = r, k = l; k <= r; k++) { 6g~+( ({lQ
if (a < b) { D^|7#b,zcH
data[k] = temp[i++]; G5;V.#"Z[
a = temp; S/fW/W*/}
} else { CL1 oAk
data[k] = temp[j--]; [%?y( q
b = temp[j]; 2uL9.q
} c.0]1
} (AuPZ
} kW+G1|
:3 y_mf>
/** $kl$D"*0
* @param data nj
* @param l E(;i>
* @param i x2m]Us@LIU
*/ LipxAE?O
private void insertSort(int[] data, int start, int len) { 9~~UM<66W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); np=kTJ
} `iQqhx
} wVE:X3Ei
} M~p=#V1D
} (Q_2ODKo
K$ AB} Fvc
堆排序： cix36MR_
c D7FfJ
package org.rut.util.algorithm.support; #w*"qn#2Uz
:,^>d3k
import org.rut.util.algorithm.SortUtil; mW +tV1XjG
e9:P9Di(b
/** !F$R+A+L
* @author treeroot ^yJ:+m;6K
* @since 2006-2-2 />F.Nsujy
* @version 1.0 Hk9U&j$
*/ T>F9Hs W
public class HeapSort implements SortUtil.Sort{ /AR]dcL@76
D%gGRA
/* (non-Javadoc) az2Xch]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KuXkI;63J>
*/ H`el#tt_
public void sort(int[] data) { NnOI:X {
MaxHeap h=new MaxHeap(); gc,Ps
h.init(data); 8^vArS;
for(int i=0;i h.remove(); P#*n3&Uu
System.arraycopy(h.queue,1,data,0,data.length); *Ru2:}?MpS
} )8'jxiGs
4|f}F
private static class MaxHeap{ `)tA YH
PUCx]5
void init(int[] data){ ~K`1
this.queue=new int[data.length+1]; bjzx!OCpV
for(int i=0;i queue[++size]=data; Bm}iU~(Z`
fixUp(size); R&Ci/
} .[(P
} Q7(eq0na
v|&s4x?D
private int size=0; =<.F3lo\s
D:m#d.m
private int[] queue; 'HB~Dbq`V
/[?Jylj
public int get() { &O*ENpF
return queue[1]; ]! )xr
} "i%jQL'.
[b;Uz|o
public void remove() { -l[jEJS}
SortUtil.swap(queue,1,size--); (}jL_E
fixDown(1); <+q$XL0
} enumK\
file://fixdown |^iA6)Q
private void fixDown(int k) { P^zy;Qs7
int j; A{(T'/~"
while ((j = k << 1) <= size) { 41}/w3Z4
if (j < size %26amp;%26amp; queue[j] j++; DxfMqH[vs
if (queue[k]>queue[j]) file://不用交换 ls @5^g
break; Ay%:@j(E
SortUtil.swap(queue,j,k); N9`97;.X
k = j; Q;20T
} +'%\Pr(
} afUTAP@
private void fixUp(int k) { (Fqa][0
while (k > 1) { }# Xi`<{
int j = k >> 1; S_5?U2%D
if (queue[j]>queue[k]) b{pg!/N4
break; Hg whe=P
SortUtil.swap(queue,j,k); aTClw<6}
k = j; Kj!Y K~~
} L|J~9FM
} 9wMEvX70
a(|xw
} MA6P"?
@\PpA9ebg%
} qpTm
W_m!@T"@H
SortUtil： U`1l8'W}:#
F.0d4:A+
package org.rut.util.algorithm; )&z4_l8`=
L#ZLawG
import org.rut.util.algorithm.support.BubbleSort; 27iy4(4
import org.rut.util.algorithm.support.HeapSort; 5~[N/Gl
import org.rut.util.algorithm.support.ImprovedMergeSort; ~6sE an3p
import org.rut.util.algorithm.support.ImprovedQuickSort; 7E(%9W6P
import org.rut.util.algorithm.support.InsertSort; yQwVQUW8B
import org.rut.util.algorithm.support.MergeSort; waQtr,m)
import org.rut.util.algorithm.support.QuickSort; PkJcd->
import org.rut.util.algorithm.support.SelectionSort; x.\XUJ4x
import org.rut.util.algorithm.support.ShellSort; lY,/W
T.2ZBG~|[
/** ZpWu,1
* @author treeroot i@6wO?Tv
* @since 2006-2-2 6|oWaA\gI
* @version 1.0 }{mG/(LX8
*/ 045\i[l=
public class SortUtil { v F[CWV.
public final static int INSERT = 1; x~Agm_Tu+'
public final static int BUBBLE = 2; 6RP+4c
public final static int SELECTION = 3; n1?}Xq|
public final static int SHELL = 4; L$}g3{
public final static int QUICK = 5; LU(%K{9
public final static int IMPROVED_QUICK = 6; }$:#+ (17
public final static int MERGE = 7; u<kD}
public final static int IMPROVED_MERGE = 8; 9v$qrM`8
public final static int HEAP = 9; >2Ca5C
s|gp
public static void sort(int[] data) { gIBpOPr^d
sort(data, IMPROVED_QUICK); A6i et~h[
} [Auc*@
private static String[] name={ m>YWxa
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %A2`&:ip
}; x< S\D&
AsAFUuI
private static Sort[] impl=new Sort[]{ "&Mou
new InsertSort(), A;T[['
new BubbleSort(), J 8q
new SelectionSort(), y1u9B;Fd
new ShellSort(), iD`k"\>9
new QuickSort(), HL8(lPgS
new ImprovedQuickSort(), ]738Z/)^
new MergeSort(), 3cHtf
new ImprovedMergeSort(), uP Rl[tS0
new HeapSort() H|K("AVP:
}; [ze/@29
w%rg\E
public static String toString(int algorithm){ j8c6[ih
return name[algorithm-1]; \gd6Yx^[
} 3&9zGy{V+
quRPg)
public static void sort(int[] data, int algorithm) { `VXZ khm
impl[algorithm-1].sort(data); */Cj$KY70
} ENyAF%6
8 ?" Ze(
public static interface Sort { _k|g@"
public void sort(int[] data); &SrGh$:X
} UM`nq;>
.HCaXFW
public static void swap(int[] data, int i, int j) { K plM['uF
int temp = data; C d|W#.6
data = data[j]; eQ\jZ0s;p
data[j] = temp; 2/EK`S
} ,{+6$h3
} `I{tZ$iD