[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; Oc#syfO
} tjGn|+|k
int i1=l; %6,SKg p
int i2=mid+1; +F` S>U
for(int cur=l;cur<=r;cur++){ qvsd5PeCO
if(i1==mid+1) W]1)zO
data[cur]=temp[i2++]; (!aNq(
else if(i2>r) T^t# c
data[cur]=temp[i1++]; drP=A~?&:
else if(temp[i1] data[cur]=temp[i1++]; %QGC8Tz
else KnQ*vM*VM
data[cur]=temp[i2++]; Jy:Qlx`
} YeL#jtC
} K~{$oD7!
o3^l~iT
} `/XY>T}-
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改进后的归并排序: e0zq1XcZ
wLH>:yKUU
package org.rut.util.algorithm.support; S(I{NL}=$
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import org.rut.util.algorithm.SortUtil; ZRB)uA)5=
nI-w}NQ
/** H3^},.
* @author treeroot n8 i] z
* @since 2006-2-2 ,, OW
* @version 1.0 !8d{q)JZ
*/ ["93~[[^
public class ImprovedMergeSort implements SortUtil.Sort { kk@fL
xb~yM%*c
private static final int THRESHOLD = 10; ,t?B+$E
vhW2PzHFRi
/* Xll}x+'uZK
* (non-Javadoc) O)*+="Rg
* O!#g<`r{K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +H-6eP
*/ 9G#n 0&wRJ
public void sort(int[] data) { DDP/DD;n}r
int[] temp=new int[data.length]; xd?f2=dd~h
mergeSort(data,temp,0,data.length-1); W)2p@j59A
} b9J_1Gl]
m@2QnA[4
private void mergeSort(int[] data, int[] temp, int l, int r) { KNvZm;Q6
int i, j, k; RuA*YV
int mid = (l + r) / 2; y<|7z99L
if (l == r) O7m(o:t x3
return; mbTEp*H
if ((mid - l) >= THRESHOLD) i{NzV
mergeSort(data, temp, l, mid); }<v@01
else -`kW&I0
insertSort(data, l, mid - l + 1); iDp)FQ$
if ((r - mid) > THRESHOLD) D9=KXo^
mergeSort(data, temp, mid + 1, r); +T1pJ 89P
else H9`)BbR
insertSort(data, mid + 1, r - mid); %KlrSo
x.!V^HQSN
for (i = l; i <= mid; i++) { XK3tgaH
temp = data; t;}|tgC
} e "4 ''/
for (j = 1; j <= r - mid; j++) { \5:i;AE
temp[r - j + 1] = data[j + mid]; 5h=}j
} %~H-)_d20
int a = temp[l]; ?}tFN_X"
int b = temp[r]; *=/ { HvJ
for (i = l, j = r, k = l; k <= r; k++) { Cazocq5
if (a < b) { p Z|V 3
data[k] = temp[i++]; x_N'TjS^{
a = temp; x;P_1J%Q
} else { .\ULbN3Z
data[k] = temp[j--]; Eex~xiiV
b = temp[j]; {M4gF8(M
} z,[Hli*0
} ICx#{q@f,
} QC OM_$y
{tuYs:
/** .Ni\\
* @param data S"bg9o
* @param l NdA[C|_8}f
* @param i ~F|+o}a`
*/ y1eWpPJa
private void insertSort(int[] data, int start, int len) { 3</_c1~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ju!]&G8
} <e=#F-DE
} *eTqVG.
} jjRi*^d9
} Ha0M)0Anv
p J! mw\:
堆排序： /!yU!`bY
h,u,^ r
package org.rut.util.algorithm.support; %op**@4/t\
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import org.rut.util.algorithm.SortUtil; )Pa'UGY
Ct<udO
/** H7&8\FNa
* @author treeroot FF`T\&u
* @since 2006-2-2 9X+V4xux
* @version 1.0 wj$<t'MN
*/ #?U}&Bd
public class HeapSort implements SortUtil.Sort{ ,*TmIPNK
wY{-BuXv
/* (non-Javadoc) .=7vI$ujd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mlg0WrJ|2
*/ L2[($l
public void sort(int[] data) { hc(#{]].
MaxHeap h=new MaxHeap(); KEo,m
h.init(data); T"}5}6rSG
for(int i=0;i h.remove(); *MFIV02[N
System.arraycopy(h.queue,1,data,0,data.length); ~]IOK$1F%
} Tj`,Z5vy
5K1)1E/Fu
private static class MaxHeap{ bivuqKA
.,|G7DGH]
void init(int[] data){ m/@wh a
this.queue=new int[data.length+1]; }#RakV4
for(int i=0;i queue[++size]=data; ,GhS[VJjR
fixUp(size); ,hm\
} X6w6%fzOH>
} `iFmrC<
<y('hI'
private int size=0; Wq D4YGN
2G& a{
private int[] queue; 9rA0lqr]5
"+R+6<"
public int get() { PfAgM1
return queue[1]; 7FP*oN?
} $D~0~gn~
6m/r+?'
public void remove() { U/66L+1
SortUtil.swap(queue,1,size--); S:#lH?<_
fixDown(1); u OmtyX
} R3)~?X1n
file://fixdown i(rL|d+'
private void fixDown(int k) { >;aWz%-
int j; z3{G9Np
while ((j = k << 1) <= size) { n:I,PS0H<
if (j < size %26amp;%26amp; queue[j] j++; c)6m$5]
if (queue[k]>queue[j]) file://不用交换 ]NQfX[
break; r..iko]T
SortUtil.swap(queue,j,k); L:$ ,v^2
k = j; U*rcd-@
} DD+7V@
} :DK {Vg6
private void fixUp(int k) { 8?B!2
while (k > 1) { !]A
int j = k >> 1; 0I-9nuw,^;
if (queue[j]>queue[k]) ('4_ xOb
break; [NjXO`5#]
SortUtil.swap(queue,j,k); ^ glri$m
k = j; %vn"{3y>rF
} T#T*Zw"+
} j1Y~_
4B8oO
} XFVE>/H
KC*e/J
} y;m|
i<C*j4qQ
SortUtil： UP$.+<vm
w8")w*9Lmg
package org.rut.util.algorithm; 9d0@wq.
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import org.rut.util.algorithm.support.BubbleSort; nSDMOyj+
import org.rut.util.algorithm.support.HeapSort; zH72'"w
import org.rut.util.algorithm.support.ImprovedMergeSort; m+`cS=-.
import org.rut.util.algorithm.support.ImprovedQuickSort; nI?[rCM
import org.rut.util.algorithm.support.InsertSort; ~TF:.8
import org.rut.util.algorithm.support.MergeSort; ^2:p|:Bz!l
import org.rut.util.algorithm.support.QuickSort; Y Vt% 0
import org.rut.util.algorithm.support.SelectionSort; OR P\b
import org.rut.util.algorithm.support.ShellSort; @o].He@L<j
B-RjMxX4>
/** ].avItg
* @author treeroot r8t}TU>C
* @since 2006-2-2 j7Yu>cr
* @version 1.0 @Myo'{3vF
*/ YH}'s>xZz
public class SortUtil { nUaJzPl
public final static int INSERT = 1; ^)/0yB
public final static int BUBBLE = 2; gi3F` m
public final static int SELECTION = 3; /cUO$m o
public final static int SHELL = 4; @W.S6;GA\
public final static int QUICK = 5; q^@Q"J =v
public final static int IMPROVED_QUICK = 6; 7(1|xYCx$
public final static int MERGE = 7; lf`{zc r:
public final static int IMPROVED_MERGE = 8; (q/e1L-S
public final static int HEAP = 9; dohA0
i'<[DjMDlm
public static void sort(int[] data) { 9Z$"K-G
sort(data, IMPROVED_QUICK); F@D`N0Pte
} `{@8Vsmy:
private static String[] name={ ''cInTCr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Uk[b|<U-`d
}; 3oj' ytxN
J/`<!$<c
private static Sort[] impl=new Sort[]{ YsC>i`n9
new InsertSort(), DaQ?\uq
new BubbleSort(), {S]}.7`l9(
new SelectionSort(), olB.*#gA
new ShellSort(), o+iiSTJEe
new QuickSort(), 7DogM".}~Q
new ImprovedQuickSort(), 5+4IN5o]=
new MergeSort(), %@J.{@>
new ImprovedMergeSort(), LG9+GszX 2
new HeapSort() VcE:G#]5
}; JJ-( Sl
UkwP
public static String toString(int algorithm){ d UE,U=
return name[algorithm-1]; .<0ye_S'y
} *uRBzO}
k!j5tsiR
public static void sort(int[] data, int algorithm) { ^]Y>[[
impl[algorithm-1].sort(data); 20h} [Q(
} 4&lv6`G `
(*9$`!wS
public static interface Sort { C\3rJy(VJ
public void sort(int[] data); FW;?s+Uyx
} 'T;P;:!\
{_"<1C
public static void swap(int[] data, int i, int j) { HQ_Ok`
int temp = data; ^rR1ZVY
data = data[j]; v|,1[i{
data[j] = temp; wYXQlxdy
} :wyno#8`-
} Vi$~-6n&