[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; YAog;QL
} 6FE[snw
int i1=l; *))|ZE6jI
int i2=mid+1; _u0dt) $
for(int cur=l;cur<=r;cur++){ Z6p>R;9n
if(i1==mid+1) I(.XK ucU
data[cur]=temp[i2++]; sAb|]Q((
else if(i2>r) XV&3h>5
data[cur]=temp[i1++]; cW RY[{v
else if(temp[i1] data[cur]=temp[i1++]; sXWMXQ3
else oaHBz_pg
data[cur]=temp[i2++]; ~EBZlTN
} "Xqj%\
} ulQE{c[
Sv ,_G'
} *sTQ9 Kr
xM:dFS
改进后的归并排序: R~i<*
<+a\'Xc
package org.rut.util.algorithm.support; e/6oC~#]
3-05y!vbcE
import org.rut.util.algorithm.SortUtil; VYBl0!t
X:A\{^~
/** >nxtQ
* @author treeroot d={}a,3?
* @since 2006-2-2 7"NUof?i
* @version 1.0 7j Q`i;L}Y
*/ e|I5Nx2)
public class ImprovedMergeSort implements SortUtil.Sort { G9 !1Wzs
}7V/(K
private static final int THRESHOLD = 10; ]O[f#lG
sYz:(hZS
/* ]mp.KvB
* (non-Javadoc) __QTlj
* (.c?)_G,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yVL~SH|
*/ [;(|^0
public void sort(int[] data) { `{/tx!
int[] temp=new int[data.length]; *VH1(E`hl
mergeSort(data,temp,0,data.length-1); e\89;)
} d+(~{xK:
Jd |hwvwFe
private void mergeSort(int[] data, int[] temp, int l, int r) { *M="k 1P1
int i, j, k; g%Z;rDfi
int mid = (l + r) / 2; +m1edPA[
if (l == r) */1z=
return; v1} $FmHL"
if ((mid - l) >= THRESHOLD) _]\mh,}
mergeSort(data, temp, l, mid); ,=mn*
else 43eGfp'
insertSort(data, l, mid - l + 1); gnv4.f:
if ((r - mid) > THRESHOLD) [L8gG.wy
mergeSort(data, temp, mid + 1, r); FUDMaI
else qG;WX n
insertSort(data, mid + 1, r - mid); hi37p1t
cIgF]My*D@
for (i = l; i <= mid; i++) { 1G\ugLm
temp = data; n8?gZ` W
} |peZ`O^~
for (j = 1; j <= r - mid; j++) { 3Ry?{m^
temp[r - j + 1] = data[j + mid]; yCz?V[49
} t~Uqsa>n@'
int a = temp[l]; +h =lAHn&
int b = temp[r]; *mYec~
for (i = l, j = r, k = l; k <= r; k++) { eq"~by[Uq
if (a < b) { ^}WeBU
data[k] = temp[i++]; @g{=f55
a = temp; u+Li'Ug
} else { d.{RZq2cp
data[k] = temp[j--]; A81kb
b = temp[j]; xTe?*
} p~r +2(J
} pd|c7D!6U,
} X 6>Pq
'\9A78NV{;
/** 43/|[
* @param data ]Z~H9!%t
* @param l Y A;S'dxY
* @param i ;a68>5Lm*
*/ 4Q$\hO3b
private void insertSort(int[] data, int start, int len) { F Hv|6zUX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5!AzEB
} i$ Zhk1
} Xdjxt?*
} *bZV4}
} !D1F4v[c=
RY*6TYX!
堆排序： I3SLR
gSP|;Gy
package org.rut.util.algorithm.support; xbIxtZm
2lGq6Au:
import org.rut.util.algorithm.SortUtil; }C)
JK_sl>v.7
/** nOOA5Gz
* @author treeroot -8-Aqh8|
* @since 2006-2-2 ^7(zoUn:
* @version 1.0 0.?|%;^ib
*/ FO*Py)/rX
public class HeapSort implements SortUtil.Sort{ Nf3L
0BD3~Lv
/* (non-Javadoc) ed&,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MJK L4 G
*/ JL]6o8x
public void sort(int[] data) { *s_)E2
MaxHeap h=new MaxHeap(); qgu.c`GmW
h.init(data); .>&kAf.
for(int i=0;i h.remove(); u{I)C0
System.arraycopy(h.queue,1,data,0,data.length); B&tl6?7h
} z7J#1q~:yY
[*,`a]z-Q
private static class MaxHeap{ 27;*6/>,
&!~q#w1W-5
void init(int[] data){ /VJ[1o^
this.queue=new int[data.length+1]; \5J/?
for(int i=0;i queue[++size]=data; aG,N>0k8
fixUp(size); NK d8XQ=%
} 5J 0
} [ h%ci3
*!Xhy87%Z)
private int size=0; iX~V(~v
O"Ar3>
private int[] queue; [_${N,1
r]2}S=[
public int get() { stpa2z
return queue[1]; W<kJ%42^j
} Al 0zL
3pm;?6i6
public void remove() { 1C:lXx$|
SortUtil.swap(queue,1,size--); #Jg)HU9
fixDown(1); A`IE8@&Z'
} !30BZM^
file://fixdown 1[dza5
private void fixDown(int k) { (]rtBeT
int j; z$;z&X$j
while ((j = k << 1) <= size) { !x|Ok'izDL
if (j < size %26amp;%26amp; queue[j] j++; *y7^4I-J
if (queue[k]>queue[j]) file://不用交换 y&B~UeB:q
break; Haiuf)a
SortUtil.swap(queue,j,k); a&|aK+^8;
k = j; 6EJ,czt(
} Q;SMwCB0M
} HJM-;C](
private void fixUp(int k) { h@/c76}f6p
while (k > 1) { |UE&M3S
int j = k >> 1; ,D>$N3;
if (queue[j]>queue[k]) jFnq{Lt
break; 9V("K
SortUtil.swap(queue,j,k); KI#),~nS
k = j; <T<?7SE+
} >OmY
} e<>(c7bF
,+%$vV .g\
} 8D)2/$NsY}
umK~K!i
} uQ. m[y
7zT]\AnO
SortUtil： %6HDLG6@^}
DTPYCG&%
package org.rut.util.algorithm; L<*wzl2Go
or>5a9pj
import org.rut.util.algorithm.support.BubbleSort; *tO7A$LDT
import org.rut.util.algorithm.support.HeapSort; nO2-fW:9]
import org.rut.util.algorithm.support.ImprovedMergeSort; V6Z2!Ht
import org.rut.util.algorithm.support.ImprovedQuickSort; -@e9!/GP,
import org.rut.util.algorithm.support.InsertSort; AF>!:
import org.rut.util.algorithm.support.MergeSort; &p`RKD
import org.rut.util.algorithm.support.QuickSort; 5 J61PuH
import org.rut.util.algorithm.support.SelectionSort; Sr/"'w;
import org.rut.util.algorithm.support.ShellSort; QVm3(;&'
{088j?[hzk
/** m^%[
* @author treeroot 0k0y'1SL
* @since 2006-2-2 G)M9to
* @version 1.0 Jah~h44&
*/ *h$Z:p-g
public class SortUtil { RL SP?o2J
public final static int INSERT = 1; Gr}Lp
public final static int BUBBLE = 2; ^LX1&yT@
public final static int SELECTION = 3; O#uTwnW
public final static int SHELL = 4; H~e;S#3_v
public final static int QUICK = 5; 2D,9$ 0k_]
public final static int IMPROVED_QUICK = 6; FhHcS>]:.
public final static int MERGE = 7; V)oUSHillH
public final static int IMPROVED_MERGE = 8; 98x]x:mgI_
public final static int HEAP = 9; ?`3`azfM
#B_ ``XV
public static void sort(int[] data) { 0Ou`&u
sort(data, IMPROVED_QUICK); DI"mi1ObE
} Rku9? zf^
private static String[] name={ Szsq|T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ZC@sUj"
}; $RfM}!7?
XL1v&'HLV
private static Sort[] impl=new Sort[]{ E?m(&O j
new InsertSort(), 5\A[ra
new BubbleSort(), {Ug?k<h7|
new SelectionSort(), ^duNEu0*
new ShellSort(), _jQ"_Ff
new QuickSort(), 4jfkCU
new ImprovedQuickSort(), 6V KsX+sd
new MergeSort(), }1f@>'o
new ImprovedMergeSort(), _ko16wfg
new HeapSort() +'Ec)7m
}; D9*GS_K2t
4N|^Joi
public static String toString(int algorithm){ $z)r(N$
return name[algorithm-1]; qCi6kEr
} 9s8B>(L
prV:Kq;O
public static void sort(int[] data, int algorithm) { za`
impl[algorithm-1].sort(data); @2yi%_]h
} sk.<|-(o
<O>1Y09C/
public static interface Sort { ?kqo~twJ
public void sort(int[] data); ,W;\6"Iwx'
} wO;\,zU
:,X,!0pWRp
public static void swap(int[] data, int i, int j) { 5zWxI]4d\
int temp = data; }SR}ET&z
data = data[j]; `L/kwVl
data[j] = temp; o}C|N)'
} L1 1/XpR
} 7aUk?Hf