[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; (B@X[~
} )T9;6R$b
int i1=l; Rq) 0i}F
int i2=mid+1; d^PD#&"g
for(int cur=l;cur<=r;cur++){ :4|M jn
if(i1==mid+1) 2+z1h^)W
data[cur]=temp[i2++]; )B6# A0
else if(i2>r) uS~#4;R
data[cur]=temp[i1++]; [!EXMpq'
else if(temp[i1] data[cur]=temp[i1++]; hR-K@fS%l'
else yf!,4SUkU
data[cur]=temp[i2++]; :Zza)>l
} kBo;h.[l
} -LTKpN`[@
]nQ+nH
} X/l;s
Y,C=@t@_
改进后的归并排序: Q $]YD pCM
/#f^n]v
package org.rut.util.algorithm.support; v,{h:
KF_?'X0=
import org.rut.util.algorithm.SortUtil; f-4.WW2FN
'TL2%T/)t
/** JBz}|MD
* @author treeroot k'Gw!p}
* @since 2006-2-2 -ey)J +?t
* @version 1.0 TjxA#D)
*/ qe?Qeh(!X
public class ImprovedMergeSort implements SortUtil.Sort { uMvb-8
D?^Y`G$.
private static final int THRESHOLD = 10; (ew} gJ
b^x07lO
/* t0q_>T-kt
* (non-Javadoc) Vo\H<_=G
* yYY Nu`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L;S}s, 2x
*/ qy ,"X)^#
public void sort(int[] data) { GX }q9
int[] temp=new int[data.length]; /4*WDiH
mergeSort(data,temp,0,data.length-1); #jBN?Z#
} :=*}htP4C
pLnB)z?
private void mergeSort(int[] data, int[] temp, int l, int r) { h./P\eDc
int i, j, k; yoQ\lk
int mid = (l + r) / 2; 4/'N|c.
if (l == r) XV>@B $hu
return; :Xfn@>;3ui
if ((mid - l) >= THRESHOLD) &+01+-1hW
mergeSort(data, temp, l, mid); 6V1:qp/6
else $e }n
insertSort(data, l, mid - l + 1); l'6d4 DZ
if ((r - mid) > THRESHOLD) !77NG4B
mergeSort(data, temp, mid + 1, r); )MSZ2)(
else @E%DP9.I
insertSort(data, mid + 1, r - mid); H=p`T+
-R0/o7
for (i = l; i <= mid; i++) { zT[6eZ8m
temp = data; w^HjZV
} (u&`Ij9
for (j = 1; j <= r - mid; j++) { e4\dpvL
temp[r - j + 1] = data[j + mid]; ^2S# Uk
} RNWX.g)b
int a = temp[l]; b*EXIzQ
int b = temp[r]; r8[T&z@_
for (i = l, j = r, k = l; k <= r; k++) { SJk>Jt=
if (a < b) { ys8Q.oBv_`
data[k] = temp[i++]; )&,{?$.
a = temp; Qs9OC9X1
} else { &eQJfc\a
data[k] = temp[j--]; aC!EWgwW[
b = temp[j]; .WX,Nd3@
} wvN`R
} <{Q'&T
} |quij0_'e
F}Srn;V
/** X(Qu{HhI
* @param data $4m*kQ
* @param l $SY]fNJQ
* @param i I4t*?
*/ TTZe$>f
private void insertSort(int[] data, int start, int len) { ~aTKG|74
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <jA105U"m>
} p?# pT}1
} 8 lT{1ro
} },@``&e
} 5MF#&v
C&<~f#lB
堆排序： )8,|-o=
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package org.rut.util.algorithm.support; @?kJ).
#_JYh?
import org.rut.util.algorithm.SortUtil; Q@S-f:!
$IX\O
/** O )d[8jw"
* @author treeroot F #`=oM$5
* @since 2006-2-2 nP3 E
* @version 1.0 t;NV $!!
*/ `yO'[2
public class HeapSort implements SortUtil.Sort{ HrM$NRhu
rD &D)w
/* (non-Javadoc) F<|t\KOW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B^v8,;jZT
*/ 8sOQ9
public void sort(int[] data) { O;uG?.\
MaxHeap h=new MaxHeap(); ,$lemH1d
h.init(data); i=S~(gp
for(int i=0;i h.remove(); vB0RKk}d5
System.arraycopy(h.queue,1,data,0,data.length); .; Q:p*
} `3cCH
uLR<FpM
private static class MaxHeap{ vB'>[jvA|
l'[A?%L%{
void init(int[] data){ pG3k
this.queue=new int[data.length+1]; Cu;5RSr2Z
for(int i=0;i queue[++size]=data; v,@F|c?_S
fixUp(size); ";SiL{Z
} ]?+{aS-]?k
} jgv`>o%<W
>ut" OL9J
private int size=0; i^msjA
L%"LlSg
private int[] queue; H`9Uf)
(p#0)C
public int get() { D{8PQ2x>
return queue[1]; 3SttHu0X
} c9"r6j2m5
;&b.T}Nf06
public void remove() { &7e)O=
SortUtil.swap(queue,1,size--); VqSc;w
fixDown(1); AIYmS#V1W2
} $sHP\{
file://fixdown 2,q}Nq
private void fixDown(int k) { \3f&7wU
int j; ]`g@UtD9`
while ((j = k << 1) <= size) { W-Hoyn>?2
if (j < size %26amp;%26amp; queue[j] j++; n2B){~vE
if (queue[k]>queue[j]) file://不用交换 ').}Nz
break; tBbOY}.VD
SortUtil.swap(queue,j,k); kYzKU2T\W
k = j; >Gml4vGK
} (V`Md\NL`
} i%m"@7.kk
private void fixUp(int k) { `F YjQe"p
while (k > 1) { =@&cHY
int j = k >> 1; DyJ.BQdk)
if (queue[j]>queue[k]) AlE8Xu9UB
break; \_V-A f{6
SortUtil.swap(queue,j,k); <EO$]>;0
k = j; dO> VwP
} q[q?hQ/b
} B%CTOi
CAq/K?:8
} S-Y=-"
f5AjJYq1
} \wcam`f
{%lXYMyu
SortUtil： ^&@w$
>@xrs
package org.rut.util.algorithm; &Mq~T_S
@hQlrq5c
import org.rut.util.algorithm.support.BubbleSort; Q/uwQo/
import org.rut.util.algorithm.support.HeapSort; g- AHdYJ
import org.rut.util.algorithm.support.ImprovedMergeSort; [qUN4x5b
import org.rut.util.algorithm.support.ImprovedQuickSort; }D411228
import org.rut.util.algorithm.support.InsertSort; jp8@vdRg
import org.rut.util.algorithm.support.MergeSort; -i0(2*<
import org.rut.util.algorithm.support.QuickSort; `nM/l@
import org.rut.util.algorithm.support.SelectionSort; o8/;;*
import org.rut.util.algorithm.support.ShellSort; 4;n6I)&.(
,YTIC8qKr
/** -}O1dEn.
* @author treeroot vE@!{*
* @since 2006-2-2 ~(!XY/0e
* @version 1.0 f`9 b*wV
*/ ?Nf>]|K:Q
public class SortUtil { C2LL|jp*
public final static int INSERT = 1; An;MVA
public final static int BUBBLE = 2; 5pr"d@.
public final static int SELECTION = 3; +/,icA}PI
public final static int SHELL = 4; _vSn`
public final static int QUICK = 5; drzL.@h|
public final static int IMPROVED_QUICK = 6; :I -V_4b
public final static int MERGE = 7; .+7;)K
public final static int IMPROVED_MERGE = 8; 7S/G B
public final static int HEAP = 9; HEA#bd\
,@1p$n
public static void sort(int[] data) { A+6 n#
sort(data, IMPROVED_QUICK); \drqG&wl
} qmO6,T-|
private static String[] name={ @1*ohdHH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +fvaUV_-
}; FZ!`B]]le,
H 0+dV3
private static Sort[] impl=new Sort[]{ O+g3X5f+
new InsertSort(), * #jsgj[
new BubbleSort(), mPI8_5V8]
new SelectionSort(), }ci#>
new ShellSort(), 3"o"fl
new QuickSort(), s!n<}C
new ImprovedQuickSort(), }*.0N;;C
new MergeSort(), *K> l*l(f]
new ImprovedMergeSort(), =]:>"_jN
new HeapSort() GKN%Tv:D_
}; GpZc5c
!Mi;*ZR
public static String toString(int algorithm){ 64hk2a8
return name[algorithm-1]; Q+g!V5'
} b Q]/?cCYV
-S3MH1TZ
public static void sort(int[] data, int algorithm) { 0-~\ W(
impl[algorithm-1].sort(data); X]\ \,
} :_!8 WB
.e=C{
public static interface Sort { A.hd Kl
public void sort(int[] data); 1V8-^
} {?'fyEeg
R|wGU)KEc'
public static void swap(int[] data, int i, int j) { _.L4e^N&UO
int temp = data; | WvUq
data = data[j]; w)Covz'uf
data[j] = temp; @V03a )6,h
} Eb=}FuV
} .'Y]R3\M+