[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; Au'y(KB
} %rG4X
int i1=l; k3qQU)
int i2=mid+1; vvv'!\'#
for(int cur=l;cur<=r;cur++){ yiQ?p:DM
if(i1==mid+1) N'VTdf?
data[cur]=temp[i2++]; ?-<lIFFh
else if(i2>r) P.XT1)qo*
data[cur]=temp[i1++]; T,/rC{
else if(temp[i1] data[cur]=temp[i1++]; f(w>(1&/B
else O'wmhLa"W
data[cur]=temp[i2++]; h'-4nu;*
} 8C@u+tx
} /S]RP>cQ
;7z6B|8
} ?'TK~,dG/
isL zgN%
改进后的归并排序: q7Hf7^a
_x<NGIz
package org.rut.util.algorithm.support; g77M5(ME
sQ#e 2
import org.rut.util.algorithm.SortUtil; hz4?ku
U_"!\lI_yg
/** }8x+F2i
* @author treeroot "a)6g0gw
* @since 2006-2-2 " _2k3
* @version 1.0 y<Q"]H.CkQ
*/ uVn"L:_
public class ImprovedMergeSort implements SortUtil.Sort { Ahwi
sWo`dZ\6WB
private static final int THRESHOLD = 10; |ZH(Z}m
'-%1ILK$3r
/* .@,t}:lD
* (non-Javadoc) d#0:U Y%~
* z9ADF(J?0'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]@Zv94Z(
*/ 6i[Ts0H%<!
public void sort(int[] data) { >NBc-DX^
int[] temp=new int[data.length]; 'NlhLu
mergeSort(data,temp,0,data.length-1); nU>P%|loXx
} pNb2t/8%%
gQ{ #C'
private void mergeSort(int[] data, int[] temp, int l, int r) { PK2;Ywk`
int i, j, k; 6h>#;M
int mid = (l + r) / 2; ;bB#Pg
if (l == r) }CBQdH&g;
return; ?z9!=A%<V~
if ((mid - l) >= THRESHOLD) Pz2 b
mergeSort(data, temp, l, mid); wu.l-VmGp)
else [j0[c9.p[
insertSort(data, l, mid - l + 1); +=8wZ]
if ((r - mid) > THRESHOLD) e%JIqKS
mergeSort(data, temp, mid + 1, r); eT".psRiC
else K|Sq_/#+U
insertSort(data, mid + 1, r - mid); *,$5EN
>8(i;)(3
for (i = l; i <= mid; i++) { 4]U=Y>\Sr
temp = data; 4[$:KGh3
} _U^[h!
for (j = 1; j <= r - mid; j++) { Xk4wU$1F
temp[r - j + 1] = data[j + mid]; $K^l=X
} #h[>RtP:
int a = temp[l]; (I}owr5:
int b = temp[r]; $os]$5(
for (i = l, j = r, k = l; k <= r; k++) { ;Sivu-%
if (a < b) { %1Q:{m
data[k] = temp[i++]; 0A)0Zw
a = temp; V8M()7uJ
} else { Qfm$q~`D^W
data[k] = temp[j--]; "@nH;Xlq
b = temp[j]; 4?+K `
} l/G+Xj4M
} dxs5woP
} %VO+\L8Fs
'Bue*
/** d%8n
* @param data Nbpn"*L,
* @param l dBXiLrEbs
* @param i [~{F(Le
*/ 1nAm\/&
private void insertSort(int[] data, int start, int len) { rC-E+%y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U80=f2
} ,j*9)
} i=Qy?aU?
} '8;bc@cE
} |_TiF;^
> ubq{'
堆排序： 7\ _MA!:<
h=A
package org.rut.util.algorithm.support; "bhK%N;
Nnh\FaI
import org.rut.util.algorithm.SortUtil; NuQ!huh
s>J5.Z7"'j
/** -MTk9<qnT
* @author treeroot #"UO`2~`l
* @since 2006-2-2 wG,"X'1
* @version 1.0 MR1I"gqE}I
*/ 2#.s{Bv
public class HeapSort implements SortUtil.Sort{ %P0
0&,D&y%
/* (non-Javadoc) hQ@k|3=Re
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _Xd"'cXw
*/ \}jA1oy
public void sort(int[] data) { 3*h"B$g!
MaxHeap h=new MaxHeap(); lJdBUoO
h.init(data); (fF8)4l
for(int i=0;i h.remove(); wo0j/4o
System.arraycopy(h.queue,1,data,0,data.length); :PT{>r[
} =>;&M)+q
&4-;;h\H
private static class MaxHeap{ 8 MO-QO
+F)-n2Bi
void init(int[] data){ ./F:]/Mt
this.queue=new int[data.length+1]; =5\*Zh1
for(int i=0;i queue[++size]=data; Xq;|l?,O
fixUp(size); \|0z:R;X
} w7@`:W
} N#ggT9>X
i3w~&y-
private int size=0; QJ XP-
<<0sv9qw1
private int[] queue; \\k=N(n
<Z%=lwtX
public int get() { G3DgB!
return queue[1]; ov_l)vt
} G`FYEmD
I}_}VSG(
public void remove() { BY~Tc5
SortUtil.swap(queue,1,size--); vIRT$W' O}
fixDown(1); fxd+0R;f
} '[WL8,.Q
file://fixdown 9f! M1
private void fixDown(int k) { vxmX5.
int j; }:2##<"\t
while ((j = k << 1) <= size) { ^m#tWb)f
if (j < size %26amp;%26amp; queue[j] j++; T[SK>z
if (queue[k]>queue[j]) file://不用交换 )h}IZSm
break; *S}@DoXS
SortUtil.swap(queue,j,k); $Lp [i <O]
k = j; WutPy_L<
} 6nL^"3@S!
} FoetP`
private void fixUp(int k) { 01'>[h#_n
while (k > 1) { MDlH[PJ@i
int j = k >> 1; M.Yp'Av
if (queue[j]>queue[k]) C7C4 eW8
break; ooVs8T2
SortUtil.swap(queue,j,k); 9ngxkOGx
k = j; w-n}&f
} <MbhBIejr
} ,ucRQ&P
e#*3X4<\K
} !5}}mf
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} lEHx/#qt9
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SortUtil： i"<W6
(\F9_y,6*\
package org.rut.util.algorithm; 1b%Oi.;
(I~
import org.rut.util.algorithm.support.BubbleSort; n[Q(q[ULV
import org.rut.util.algorithm.support.HeapSort; r-y;"h'
import org.rut.util.algorithm.support.ImprovedMergeSort; _Ay^v#a
import org.rut.util.algorithm.support.ImprovedQuickSort; qSNCBn '
import org.rut.util.algorithm.support.InsertSort; UQDAql
import org.rut.util.algorithm.support.MergeSort; o-=|}u]mz
import org.rut.util.algorithm.support.QuickSort; f8;?WSGyD2
import org.rut.util.algorithm.support.SelectionSort; }<^mUG
import org.rut.util.algorithm.support.ShellSort; _^& q,S
N-K/jY
/** r!&174DSR1
* @author treeroot B@(d5i{h
* @since 2006-2-2 #4Z e2T|
* @version 1.0 1b~21n
*/ #+ch
public class SortUtil { #NFB=oJI
public final static int INSERT = 1; 94w)Yln
public final static int BUBBLE = 2; "OenYiz
public final static int SELECTION = 3; F1.Xk1y%
public final static int SHELL = 4; \ivxi<SR
public final static int QUICK = 5; 'V?FeWp
public final static int IMPROVED_QUICK = 6; 9qftMDLZJ\
public final static int MERGE = 7; F%6wdM W
public final static int IMPROVED_MERGE = 8; c]uieig0~
public final static int HEAP = 9; UDJjw
'JOCL0FP
public static void sort(int[] data) { BaQyn 6B
sort(data, IMPROVED_QUICK); K%dQ;C*?
} ],weqs
private static String[] name={ a<&K^M&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <G}Lc
}; cTq@"v di
4G,FJjE`p
private static Sort[] impl=new Sort[]{ Pdf-2 Tx
new InsertSort(), ~LuGfPO^
new BubbleSort(), 6=/sEzS'
new SelectionSort(), J3mLjYy
new ShellSort(), J]U_A/f
new QuickSort(), <mFDC?j
new ImprovedQuickSort(), )J[m>tyY5
new MergeSort(), Z9DfwWI2nu
new ImprovedMergeSort(), ` Tap0V
new HeapSort() vi}16V84l
}; q5_zsUR=
I#2$CSJ
public static String toString(int algorithm){ =_`q;Tu=
return name[algorithm-1]; i3eF_
} vcFR Td
c K\
public static void sort(int[] data, int algorithm) { L?/AKg
impl[algorithm-1].sort(data); OWibmX
} x:Q\pZ
sMMOZ'bT
public static interface Sort { i6WPf:#wr
public void sort(int[] data); {N}az"T4f
} ?xqS#^Z
W^8
public static void swap(int[] data, int i, int j) { n$C-^3c
int temp = data; 7K.75%}
data = data[j]; (B4)L%
data[j] = temp; 5@xR`g-
} > '=QBW
} { YQS fk