[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; (omdmT%D
} C|"T!1MlY4
int i1=l; Mr:*l`b_
int i2=mid+1; o)n8,k&nm
for(int cur=l;cur<=r;cur++){ ;nj'C1
if(i1==mid+1) S6}_Z
data[cur]=temp[i2++]; x@.iDP@(
else if(i2>r) _5M!ec
data[cur]=temp[i1++]; mquna"}N
else if(temp[i1] data[cur]=temp[i1++]; (d993~|h
else H_;Dq*
data[cur]=temp[i2++]; ;~z>GJox
} (o^V[zV
} M@!Gk
_ %&"4bm.
} ?>q=Nf^Q.
#Vn=(U4}!_
改进后的归并排序: /(n)I
c%pW'UE&
package org.rut.util.algorithm.support; _KmpC>J+
oD{V_/pdx
import org.rut.util.algorithm.SortUtil; (#c5Q&
HAo8]?J
/** "+nURdicO
* @author treeroot ABhza|
* @since 2006-2-2 pRc(>P3;
* @version 1.0 nIph[Vs-Z
*/ a,cDj
public class ImprovedMergeSort implements SortUtil.Sort { TOMvJ>bF
aSHZR
private static final int THRESHOLD = 10; E\m?0]W|
Zpb3>0<R
/* ieBW 0eMi
* (non-Javadoc) 0 {{7"
* Zy*}C,Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }WI24|`zM
*/ GU&XK7L
public void sort(int[] data) { -<z'f){gb
int[] temp=new int[data.length]; ~w]1QHA'f
mergeSort(data,temp,0,data.length-1); h:bs/q+-
} yvDzxu
T>f-b3dk
private void mergeSort(int[] data, int[] temp, int l, int r) { aqzvT5*8%
int i, j, k; iUI,r*
int mid = (l + r) / 2; vy|}\%*r~
if (l == r) /4~RlXf@
return; Tg:NeAN7(
if ((mid - l) >= THRESHOLD) ^* DKF
mergeSort(data, temp, l, mid); gP1$#KgU
else r456M-~
insertSort(data, l, mid - l + 1); G$@X>)2N8
if ((r - mid) > THRESHOLD) A5H[g`&
mergeSort(data, temp, mid + 1, r); a}>GQu*y
else 6@F Z,e
insertSort(data, mid + 1, r - mid); '!1lK
9(X *[X#
for (i = l; i <= mid; i++) { ?,%N?
temp = data; q"52-42
} .!6ufaf$
for (j = 1; j <= r - mid; j++) { n,HWVo>([
temp[r - j + 1] = data[j + mid]; T >-F~?7Sv
} j(:I7%3&(*
int a = temp[l]; %@a8P
int b = temp[r]; O,bkQY$v
for (i = l, j = r, k = l; k <= r; k++) { >T2LEW
if (a < b) { 0Sq][W=
data[k] = temp[i++]; xkNyvqcw
a = temp; :F,O
} else { 3A:q7#m
data[k] = temp[j--]; =*qD4qYA
b = temp[j]; \Ng\B.IQ
} ?[<Tx-L
} 0~wF3BgV
} XqRJr%JH
$Nrm!/)*'}
/** pLa[}=
* @param data fDE%R={!n5
* @param l ^,l_{
* @param i _lzyMEdr
*/ dkgSvi :!
private void insertSort(int[] data, int start, int len) { <IW#ME
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IK,|5]*Ar
} }bN%u3mHws
} E$9Ys
} ^-FX
} iGB_{F~t4}
g%F"l2M
堆排序： l`kWz5[~
J q{7R
package org.rut.util.algorithm.support; /bj <Ft\
q~CA0AR
import org.rut.util.algorithm.SortUtil; 26X+ }^52
:m86 hBE.
/** xq6cKtSv
* @author treeroot K{n{KB&_&
* @since 2006-2-2 +("7ZK?
* @version 1.0 Kvsh
*/ ?JL7=o X
public class HeapSort implements SortUtil.Sort{ vvUSeG\n#j
~GE$myUT\p
/* (non-Javadoc) A:(*y 2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hTP:[w)
*/ OD']:
public void sort(int[] data) { 3@5=+z~CW
MaxHeap h=new MaxHeap(); %uv?we7
h.init(data); 0]D0{6x8
for(int i=0;i h.remove(); )54%HM_$k
System.arraycopy(h.queue,1,data,0,data.length); yj4+5`|f
} ?"?6,;F(4
Kwc6mlw~M
private static class MaxHeap{ GGhM;%H_99
=^H4Yck/5
void init(int[] data){ 9qS"uj
this.queue=new int[data.length+1]; As+t##gN
for(int i=0;i queue[++size]=data; Y>jiXl?&
fixUp(size); Xl@cHO=i
} (98Nzgxgx}
} &uC@|dbC5
q80S[au
private int size=0; &rkEK4
j~j\\Y
private int[] queue; oD}uOC}FS{
'zh7_%
public int get() { fDx9iHGv
return queue[1]; 1s1=rZ!
} s+:=I e
;gC|
public void remove() { \M'-O YH_[
SortUtil.swap(queue,1,size--); 5BBD.!
fixDown(1); p}[zt#v
} 3> /K0N|$
file://fixdown dg4vc][
private void fixDown(int k) { C"IKt
int j; jD7NblX
while ((j = k << 1) <= size) { 9W5onn
if (j < size %26amp;%26amp; queue[j] j++; yoAfc
if (queue[k]>queue[j]) file://不用交换 =)|-?\[w
break; Pz$R(TV
SortUtil.swap(queue,j,k); ,^icPQSwc
k = j; \c^45<G2qA
} A<;SnXm
} <T[E=#
private void fixUp(int k) { BC'llD
while (k > 1) { Le%ZV%,
int j = k >> 1; Ali9pvE
if (queue[j]>queue[k]) u+{a8=
break; k%^lF?_0I
SortUtil.swap(queue,j,k); WOh|U4vt
k = j; =_0UD{"_0
} mS0udHod
} z2Z^~,i
XV^1tX>f{
} ^eoLAL
fA89|NTSUh
} LY+|[qka
/> 4"~q)
SortUtil： o6//IOZ
@O[5M2|r
package org.rut.util.algorithm; -kbg\,PW
qoAj] ")
import org.rut.util.algorithm.support.BubbleSort; |\n_OS7
import org.rut.util.algorithm.support.HeapSort; I"KN"v^
import org.rut.util.algorithm.support.ImprovedMergeSort; E\C9|1)
import org.rut.util.algorithm.support.ImprovedQuickSort; YM DMH"3
import org.rut.util.algorithm.support.InsertSort; B2ec@]uD`
import org.rut.util.algorithm.support.MergeSort; Uo2GK3nT
import org.rut.util.algorithm.support.QuickSort; ?mlNL/:
import org.rut.util.algorithm.support.SelectionSort; 0 Us5
import org.rut.util.algorithm.support.ShellSort; ]KJj6xn
H8"@iE,
/** W2.qhY5
* @author treeroot O eL}EVs8=
* @since 2006-2-2 gJM`[x`T
* @version 1.0 -+O 9<3ly
*/ r7',3V
public class SortUtil { 6"}?.E$
public final static int INSERT = 1; 7k8pZ
public final static int BUBBLE = 2; PiA0]>
public final static int SELECTION = 3; 7NJhRz`_
public final static int SHELL = 4; L5,NP5RC
public final static int QUICK = 5; HbW0wuI
public final static int IMPROVED_QUICK = 6; w}=5ElB
public final static int MERGE = 7; ` Jdb;
public final static int IMPROVED_MERGE = 8; y '!m4-
public final static int HEAP = 9; p/h Rk<K6
YY!Rz[/
public static void sort(int[] data) { I(XOE$3
sort(data, IMPROVED_QUICK); p|]\P%,\
} KVJ_E!i
private static String[] name={ o]opdw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =AuR:Tx
}; ,{mCf^
>FkWH7
private static Sort[] impl=new Sort[]{ w`5xrqt@
new InsertSort(), YD7Oao4:o
new BubbleSort(), |vw"[7_aS
new SelectionSort(), ^U!0-y
new ShellSort(), 6AhM=C
new QuickSort(), 8e(\%bX
new ImprovedQuickSort(), ?5{>;#0Z
new MergeSort(), G nG>7f[v
new ImprovedMergeSort(), gN"7be&J
new HeapSort() b1($R[
}; yYfsy?3
}1upi=+aE
public static String toString(int algorithm){ ruy}/7uf
return name[algorithm-1]; 2=^m9%
} ;&)-;l7M
ZEx}$<)_
public static void sort(int[] data, int algorithm) { Dg?:/=,=9r
impl[algorithm-1].sort(data); PAM}*'
} zld#qG6
Uw7h=UQh
public static interface Sort { sjV!5Z
public void sort(int[] data); BGX.U\uc
} Kuu *&u
M"94#.dKK
public static void swap(int[] data, int i, int j) { :w^Ed%>y7
int temp = data; qO|R^De
data = data[j]; L}pt)w*V1j
data[j] = temp; 6l:qD`_
} ?o|f':
} ZNvEW