[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; iKd+AzT
} `#l3a
int i1=l; F xm:m
int i2=mid+1; j-R*!i
for(int cur=l;cur<=r;cur++){ a,S;JF)v
if(i1==mid+1) U'9z.2"}9
data[cur]=temp[i2++]; *5k40?w
else if(i2>r) gELG/6l
data[cur]=temp[i1++]; I-g/)2
else if(temp[i1] data[cur]=temp[i1++]; P33xt~
else $57b.+2n
data[cur]=temp[i2++]; F{a;=h#@Q
} -j]k^
} x,U_x
DZC@^k \E
} #I453
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改进后的归并排序: kUS]g r~i
f4Y)GO<R]
package org.rut.util.algorithm.support; HLwMo&*rA
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import org.rut.util.algorithm.SortUtil; -c0ypz
9>9EZ?4m
/** z dgS@g
* @author treeroot W +ER'lX
* @since 2006-2-2 u>:(MARsR
* @version 1.0 \|{/.R
*/ &LAXNk2
public class ImprovedMergeSort implements SortUtil.Sort { Su2{nNC>
0Z6geBMc
private static final int THRESHOLD = 10; \_8wU'7
I6f/+;E
/* 2NMs-Zs
* (non-Javadoc) iI IXv
* bqAW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w(6n
*/ {JP q.A
public void sort(int[] data) { `nl n@ ;
int[] temp=new int[data.length]; PY^#hC5:
mergeSort(data,temp,0,data.length-1); gk%@& TB/
} <R /\nYXz
.N qXdari
private void mergeSort(int[] data, int[] temp, int l, int r) { @GFB{ ;=
int i, j, k; (\{k-2t*^
int mid = (l + r) / 2; R^*baiXVI
if (l == r) yk`qF'4]
return; A<X?1$
if ((mid - l) >= THRESHOLD) 9KXL6#h
mergeSort(data, temp, l, mid); +GI906K
else s;Gd`-S>d
insertSort(data, l, mid - l + 1); RPW46l34
if ((r - mid) > THRESHOLD) VIT|#
mergeSort(data, temp, mid + 1, r); 3OZPy|".ax
else W}CM;~*L
insertSort(data, mid + 1, r - mid); V]p{jLG
H3D<"4Q>
for (i = l; i <= mid; i++) { 9RJF
temp = data; hGz_F/
} Ur(R[*2bx
for (j = 1; j <= r - mid; j++) { PW5]+ |#
temp[r - j + 1] = data[j + mid]; L"m^LyU
} 9 %T??-
int a = temp[l]; -r={P_E6
int b = temp[r]; RSp wU;o6z
for (i = l, j = r, k = l; k <= r; k++) { aj1]ZT\
if (a < b) { OM*c7&
data[k] = temp[i++]; G.rz6o;
a = temp; N,Eap KG
} else { e7RgA1
data[k] = temp[j--]; ?RsrY4P
b = temp[j]; @AEH?gOX
} ?*fY$93O
} e73=*~kfR
} hIJtu;}zU
s<s}6|Z
/** kFn/dQ4|
* @param data .<"XE7
* @param l Jb QK$[z"
* @param i [eX]x
*/ C^J<qq&
private void insertSort(int[] data, int start, int len) { {zwH3)|Hn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9TW[;P2> )
} @+gr/Pul^
} W[ l
} g#J`7n
} 'hpOpIsHa
#-0e0
堆排序： ytZo0pad
mmTpF]t ?`
package org.rut.util.algorithm.support; e4S@ J/D
U#jz5<r
import org.rut.util.algorithm.SortUtil; hd3
V}jGxt0
/** Mog>W&U
* @author treeroot *w+'I*QSt~
* @since 2006-2-2 }[AaI #
* @version 1.0 nip6|dN
*/ uvId],dQ5
public class HeapSort implements SortUtil.Sort{ {^N,=m\
gHg=G+Q@
/* (non-Javadoc) "q=Cye
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uo#1^`P
*/ ${f<}
public void sort(int[] data) { h `Lr5)B'
MaxHeap h=new MaxHeap(); Ykxk`SJ
h.init(data); GX>8B:]o|
for(int i=0;i h.remove(); ]o6ZZK
System.arraycopy(h.queue,1,data,0,data.length); '+88UFSq5
} mY"7/dw<v
,aP6ct
private static class MaxHeap{ O$*lPA[
L@N%S Sf
void init(int[] data){ J"`VA_[
this.queue=new int[data.length+1]; vV,TT%J8D
for(int i=0;i queue[++size]=data; l6 G6H$
fixUp(size); ~; 9HGtg
} O_FB^BB
} `"5Ub,~
5vx 4F f
private int size=0; r w?wi}}gn
K*~{M+lU7
private int[] queue; ^ZwZze:2
~KK} $iM
public int get() { -SsgW
return queue[1]; z|#*c5Y9w
} ] K$YtM^
y;b#qUd5a
public void remove() { %3z[;&*3O
SortUtil.swap(queue,1,size--); IiPX`V>RC
fixDown(1); dbf<k%i6
} \c_g9Iqa
file://fixdown cY?|RXNmZ
private void fixDown(int k) { fn}E1w
int j; `B%%2p&
while ((j = k << 1) <= size) { mskG2mA
if (j < size %26amp;%26amp; queue[j] j++; m?e/MQr
if (queue[k]>queue[j]) file://不用交换 >Pw5!i\
break; ,/f\
SortUtil.swap(queue,j,k); f_c\uN@f
k = j; 'uu*DgEr
} Ip t;NlR
} KuR]X``2
private void fixUp(int k) { 6n9/`D!
while (k > 1) { H:.~! r
int j = k >> 1; OyO<A3
if (queue[j]>queue[k]) v=k+MvX
break; ,DFN:uf=l
SortUtil.swap(queue,j,k); AiHU*dp6
k = j; <*5S7)]BP
} - Jaee,P
} 8"h;+;
]it. R-
} oCT,v0+4O
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} 9vRLM*9|
j4XVk@'OX
SortUtil： B^2r4 9vC
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package org.rut.util.algorithm; =%U&$d|@G
gC$_yd6m L
import org.rut.util.algorithm.support.BubbleSort; 6u_i>z
import org.rut.util.algorithm.support.HeapSort; JD*HG]
import org.rut.util.algorithm.support.ImprovedMergeSort; v!I z&M:z
import org.rut.util.algorithm.support.ImprovedQuickSort; & AK\Pw)
import org.rut.util.algorithm.support.InsertSort; 6 IvAs-%W
import org.rut.util.algorithm.support.MergeSort; {V7mpVTX.
import org.rut.util.algorithm.support.QuickSort; `l45T~`]$
import org.rut.util.algorithm.support.SelectionSort; Ta[2uv>
import org.rut.util.algorithm.support.ShellSort; c/$].VG0
,7V?Kj
/** ?NA$<0
* @author treeroot 3eY>LWx
* @since 2006-2-2 +3o vO$g
* @version 1.0 nmpc<&<<
*/ `,AOxJ:$
public class SortUtil { ,$`}Rf<
public final static int INSERT = 1; "|JbdI]%P
public final static int BUBBLE = 2; EMnz;/dMt
public final static int SELECTION = 3; A.b^?k%I
public final static int SHELL = 4; jm%P-C @
public final static int QUICK = 5; +pYgh8w@
public final static int IMPROVED_QUICK = 6; U*+-#
public final static int MERGE = 7; k (AE%eA
public final static int IMPROVED_MERGE = 8; d'(n/9K
public final static int HEAP = 9; 4D&L]eJ
L9)gN.#
public static void sort(int[] data) { "6C a{n1hk
sort(data, IMPROVED_QUICK); |ru!C(
} XoD:gf
private static String[] name={ ?Tc|3U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @95p[
}; IhzY7U)}T
oI#TjF
private static Sort[] impl=new Sort[]{ "]jN'N(.
new InsertSort(), \JPMGcL
new BubbleSort(), q25p3
new SelectionSort(), 6n/=n%US
new ShellSort(), i\lvxbp
new QuickSort(), ]]y>d!
new ImprovedQuickSort(), :.=:N%3[
new MergeSort(), Lu^uY7 ?}
new ImprovedMergeSort(), !84Lvg0&
new HeapSort() Q@}SR%p
}; B^9C}QB
ajkV"~w',|
public static String toString(int algorithm){ x .@O]}UH
return name[algorithm-1]; F4~OsgZ'N
} iJdJP)!tz6
gGE{r}$
public static void sort(int[] data, int algorithm) { '{0O!y[H6
impl[algorithm-1].sort(data); b)a5LFt|
} ^XeJZkLEB
j&dCP@G
public static interface Sort { ;Mq'+4$
public void sort(int[] data); H,<CR9@(5d
} Y->sJm
(]sm9PO
public static void swap(int[] data, int i, int j) { K?M~x&Q
int temp = data; 8m H6?,@6
data = data[j]; `6-flc0r
data[j] = temp; /Q W^v;^
} xN$V(ZX4
} c\[&IlM