[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; x(bM
} (5&l<u"K~
int i1=l; &E$:^a4d
int i2=mid+1; .8/W_iC92
for(int cur=l;cur<=r;cur++){ *[0)]|r
if(i1==mid+1) Zm#qW2a]P
data[cur]=temp[i2++]; Y"'k $jS-
else if(i2>r) VDC"tSQ
data[cur]=temp[i1++]; {6brVN.V
else if(temp[i1] data[cur]=temp[i1++]; }I ^e:,{
else H`Ld,E2ex&
data[cur]=temp[i2++]; r:9H>4m
} ]-tAgNzl%
} 5 @61=Au
hSfLNvK
} C^!ej"
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改进后的归并排序: eVB.g@%T
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package org.rut.util.algorithm.support; kG|pM54:^
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import org.rut.util.algorithm.SortUtil; 2-.%WhE/
C;.+ kE
/** S[L2vM)
* @author treeroot OCYC Dn
* @since 2006-2-2 ybgAyJ{J<
* @version 1.0 AAld2"r
*/ IX y $
public class ImprovedMergeSort implements SortUtil.Sort { qD/FxR-!
a@U0s+V&a0
private static final int THRESHOLD = 10; v}-jls
{GM8}M~D&
/* SWM6+i p
* (non-Javadoc) ]#Q'~X W
* FAP1Bm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f+Da W
*/ c0W4<(
public void sort(int[] data) { dI|`"jl#
int[] temp=new int[data.length]; vV+>JM6<K
mergeSort(data,temp,0,data.length-1); 'ktWKW$ D
} O4w:BWVsn
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private void mergeSort(int[] data, int[] temp, int l, int r) { 'c|Y*2@
int i, j, k; H-Z1i
int mid = (l + r) / 2; gC}D0l[
if (l == r) 'P5|[du+
return; =| M[JPr
if ((mid - l) >= THRESHOLD) 20p/p~<
mergeSort(data, temp, l, mid); (8/Qt\3jv
else HOY9{>E}z
insertSort(data, l, mid - l + 1); /"%QIy'{
if ((r - mid) > THRESHOLD) 6 w:@i_2^
mergeSort(data, temp, mid + 1, r); jt8% L[
else *,=WaODO%
insertSort(data, mid + 1, r - mid); MX#MDA-4
Z`lCS o;
for (i = l; i <= mid; i++) { *^5..0du
temp = data; %*wOJx
} hr] :bR
for (j = 1; j <= r - mid; j++) { + s snCr
temp[r - j + 1] = data[j + mid]; o4g<[X)
} Uv"GG: K_
int a = temp[l]; niIjatT
int b = temp[r]; 1GL@t?S
for (i = l, j = r, k = l; k <= r; k++) { M:OJL\0
if (a < b) { 9AROvq|#
data[k] = temp[i++]; I+^B]@"
a = temp; 9#AsSbBpf
} else { L?5OWVX!v
data[k] = temp[j--]; YOHYXhc{S
b = temp[j]; LYY|8)Nj2"
} =w&<LJPJ
} C4ut!I #
} 2o5v{W
uKZe"wN;
/** #Ua+P(1q
* @param data ,lly=OhKb
* @param l %wp#vO-$
* @param i #815h,nP+
*/ Rtl;*ZAS
private void insertSort(int[] data, int start, int len) { %Pb 5PIk4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *R6n+d
} #j{!&4M
} L('G1J}
} d#9"_{P
} y`EcBf
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堆排序： ]'UO]i/
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package org.rut.util.algorithm.support; LF~=,S
O/(qi8En
import org.rut.util.algorithm.SortUtil; 2S\~
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/** +jD{O @9
* @author treeroot U&mJ_f#M
* @since 2006-2-2 %q@eCN
* @version 1.0 2\z"6
*/ Pe !eID8
public class HeapSort implements SortUtil.Sort{ Zbp ByRyN
!m#cneV
/* (non-Javadoc) 'sL>U$(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a9q68
*/ wOy1i/oj
public void sort(int[] data) { ZL`G<Mo;.
MaxHeap h=new MaxHeap(); nuB@Fkr
h.init(data); ,Jf)A/_
for(int i=0;i h.remove(); d/GP.d
System.arraycopy(h.queue,1,data,0,data.length); J(\"\Z
} nNIV(
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private static class MaxHeap{ Oifu ?f<r
X"W%(x`w
void init(int[] data){ In0kP"
this.queue=new int[data.length+1]; *a@pZI0'
for(int i=0;i queue[++size]=data; .Jz$)R
fixUp(size); "9-duDg
} Y'n TyH
} byv(:xk|'e
HlB'yOHv!
private int size=0; D4m2*%M
X?b]5?K;r
private int[] queue; & CiUU
Hm+-gI3*
public int get() { ,XW6W&vR;
return queue[1]; <=V2~ asB
} KLXv?4!
l{4=La{?j
public void remove() { ^)b*"o
SortUtil.swap(queue,1,size--); !+.|T9P
fixDown(1); w.cQ|_
} vL13~q*F
file://fixdown :rb<mg[
private void fixDown(int k) { P sD+?
int j; )@3ce'
while ((j = k << 1) <= size) { QJo)
if (j < size %26amp;%26amp; queue[j] j++; Xu$xO(
if (queue[k]>queue[j]) file://不用交换 -pj&|< h+9
break; JBa=R^k
SortUtil.swap(queue,j,k); YizJT0$
k = j; 9oP8| <+
} J?-"]s`J
} F]W'spF,
private void fixUp(int k) { YF@'t~_Z
while (k > 1) { j?6%=KuX<
int j = k >> 1; qyc:;3?wm
if (queue[j]>queue[k]) JW&/l
break; >.PLD} zE_
SortUtil.swap(queue,j,k); Q/iaxY#
k = j; mqk~Pno|<
} b^PYA_k-Xn
} uj&^W[s
A$W,#`E
} @4h .?
IBU(Hm1,
} m4ovppC
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SortUtil： KEsMes(*
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package org.rut.util.algorithm; _U$d.B'*)z
!O)Ruwy
import org.rut.util.algorithm.support.BubbleSort; jh`&c{#*)M
import org.rut.util.algorithm.support.HeapSort; XN]kNJX
import org.rut.util.algorithm.support.ImprovedMergeSort; !:`QX\Ux
import org.rut.util.algorithm.support.ImprovedQuickSort; B{QY-F~
import org.rut.util.algorithm.support.InsertSort; GfY!~J
import org.rut.util.algorithm.support.MergeSort; _C"W;n'
import org.rut.util.algorithm.support.QuickSort; IZ3w.:A
import org.rut.util.algorithm.support.SelectionSort; ^MUtmzh
import org.rut.util.algorithm.support.ShellSort; Ol"p^sqwj
vN7a)s
/** suaTXKjyk+
* @author treeroot W*-+j*e|_P
* @since 2006-2-2 _=j0Y=/IF
* @version 1.0 bR49(K$~
*/ ^Ebaq`{V\'
public class SortUtil { x!MYIaZ7
public final static int INSERT = 1; of8/~VO
public final static int BUBBLE = 2; UBi0 /
public final static int SELECTION = 3; +|Xx=1_?BK
public final static int SHELL = 4; rayC1#f
public final static int QUICK = 5; ?bQ~+M\
public final static int IMPROVED_QUICK = 6; Az6f I*yP
public final static int MERGE = 7; _7]* 5Pxo
public final static int IMPROVED_MERGE = 8; j*g5f
public final static int HEAP = 9; WU{G_Fqaz
sBq @W4
public static void sort(int[] data) { qJVW :$1q
sort(data, IMPROVED_QUICK); bKmR &
} v%=G~kF}[
private static String[] name={ .!,T>:R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e0+N1kY
}; e!ar:>T
D>~z{H%\
private static Sort[] impl=new Sort[]{ 4&r^mGs,
new InsertSort(), o{?s\)aBa
new BubbleSort(), DK&J"0jz,
new SelectionSort(), LnxJFc:1K
new ShellSort(), Wze\z
new QuickSort(), ?A2#V(4
new ImprovedQuickSort(), 5X nA.?F^
new MergeSort(), {G/4#r 2>
new ImprovedMergeSort(), ?H0 #{!s
new HeapSort() &I:5<zK{
}; mE%H5&VSI
QgC
public static String toString(int algorithm){ jw5Bbyk
return name[algorithm-1]; W<xu*U(A
} #)hM]=,e
|JSj<~1ki
public static void sort(int[] data, int algorithm) { L/"XIMI*Xg
impl[algorithm-1].sort(data); ;a XcGa
} l^%Ez?-:s
/'u-Fr(Q+
public static interface Sort { W'-B)li
public void sort(int[] data); @.a[2,o_
} pqBd#
d11~mU\
public static void swap(int[] data, int i, int j) { ON~SZa
int temp = data; gsqlWfa
data = data[j]; 60*2k
data[j] = temp; Aj;Z &
} .4Jea#M&x
} `Ou\:Iz0u