[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; %bCcsdK
} sN6 0o 7.
int i1=l; *i=?0M4S
int i2=mid+1; Qw3a"k-
for(int cur=l;cur<=r;cur++){ Z}sG3p
if(i1==mid+1) +^/Nil
data[cur]=temp[i2++]; :5TXA
else if(i2>r) #)W8.
data[cur]=temp[i1++]; 3X88x-3
else if(temp[i1] data[cur]=temp[i1++]; C1ZFA![
else zF[3%qZE:T
data[cur]=temp[i2++]; U@o2gjGN
} g`%ED0aR
} GVjv**U
g_rA_~dh
} e8~62O^
9f@#SB_H
改进后的归并排序: 5QqJI#4~
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package org.rut.util.algorithm.support; ()+jrrK
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import org.rut.util.algorithm.SortUtil; w,M1`RsK
JxX jDYrU
/** wc<2Uc
* @author treeroot ]7#^])>
* @since 2006-2-2 LV}UBao5n
* @version 1.0 OhSt6&+
*/ |%M{kA-
public class ImprovedMergeSort implements SortUtil.Sort { sYAG,r>h
bqZ?uvc3
private static final int THRESHOLD = 10; O4 +SD
yDCooX0
/* ROJ'-Vde9
* (non-Javadoc) y9V;IXhDc
* "ay,Lr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;a!h.8UJPI
*/ jyY^iQ.2
public void sort(int[] data) { cc2d/<:
int[] temp=new int[data.length]; ?`vM#)
mergeSort(data,temp,0,data.length-1); *@-q@5r}!
} 9J-!o]f .b
!7O=<
private void mergeSort(int[] data, int[] temp, int l, int r) { yS:IRI.
int i, j, k; J[<D/WIH
int mid = (l + r) / 2; ;55tf l
if (l == r) ?L<UOv7;t
return; b6LC$"t0
if ((mid - l) >= THRESHOLD) E]HND.`*>
mergeSort(data, temp, l, mid); D+*uKldS;
else y]z)jqX<
insertSort(data, l, mid - l + 1); ?1-n\ka
if ((r - mid) > THRESHOLD) ="#:=i]
mergeSort(data, temp, mid + 1, r); =\ti<
else "6I-]:K-
insertSort(data, mid + 1, r - mid); P-E'cb%ub
9a"Y,1
for (i = l; i <= mid; i++) { )$gsU@H -
temp = data; [T}%q"<
} %#S"~)
for (j = 1; j <= r - mid; j++) { r|JiGj^om
temp[r - j + 1] = data[j + mid]; <tu[cA>
} Ab^>z
int a = temp[l]; l ))~&
int b = temp[r]; %U=S6<lbj;
for (i = l, j = r, k = l; k <= r; k++) { j(@g
if (a < b) { H3/Y
data[k] = temp[i++]; HggR=>s
a = temp; gJcXdv=]2
} else { {E3<GeHw4
data[k] = temp[j--]; {.' ,%)
b = temp[j]; `aO@N(
} RF,=bOr19
} SBN_>;$c5}
} &G7)s%q
lH,]ZA./
/** XoH[MJC
* @param data *Lb(urf
* @param l 0?5%
* @param i Fl#VKU3h
*/ ERX|cc
private void insertSort(int[] data, int start, int len) { !5E%W[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XW&8T"q7
} Q[ 9rA
} ,/w852|ub
} [FAOp@7W
} u]]5p[|S
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堆排序： Vlp*'2VO
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package org.rut.util.algorithm.support; [o[v"e\w
`%mBu`A
import org.rut.util.algorithm.SortUtil; X#Dhk6
vS J<
/** Z68Wf5@to&
* @author treeroot 9 .&Or4>
* @since 2006-2-2 :,}:c%-^"
* @version 1.0 nuQLq^e
*/ _#^A:a^e8
public class HeapSort implements SortUtil.Sort{ 'QekQ];
rmg";(I
/* (non-Javadoc) |S>J<]H p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cO=UswIkwO
*/ =-Q
public void sort(int[] data) { %)6:eIS
MaxHeap h=new MaxHeap(); zfr(dQ
h.init(data); ?%za:{
for(int i=0;i h.remove(); r"u(!~R
System.arraycopy(h.queue,1,data,0,data.length); 'Qs3
} %:be{Y6
RZ/+K=
private static class MaxHeap{ Og;$P'U
C5sN[
void init(int[] data){ '+q'H
this.queue=new int[data.length+1]; sw qky5_K
for(int i=0;i queue[++size]=data; ;@ll
fixUp(size); m)[wZP*e
} h@>rjeY@
} G5QgnxwP2
&J&w4"0N'
private int size=0; '/yx_RK2?
$Op/5j
private int[] queue; HDW\S#
1:;&wf
public int get() { LnRi+n[@7
return queue[1]; `.sIZku
} t1RwB23
8#Z\}gGz
public void remove() { %dk$K!5D0
SortUtil.swap(queue,1,size--); "za*$DU
fixDown(1); k0e|8g X
} #Mem2cz
file://fixdown gH{\y5%rO
private void fixDown(int k) { [>Kxm
int j; zk 'e6
while ((j = k << 1) <= size) { 7dg 5HH
if (j < size %26amp;%26amp; queue[j] j++; qYu!:xa8
if (queue[k]>queue[j]) file://不用交换 G`9F.T_Z^)
break; %`T^qh_dE
SortUtil.swap(queue,j,k); h&)vdCCk
k = j; :jKXKY+T
} z`r4edk3
} CQuvbAo
private void fixUp(int k) { RoM*Qjw
while (k > 1) { wmcp`8w.
int j = k >> 1; rW%'M#! =
if (queue[j]>queue[k]) ~tj7zI6
break; P2:Q+j:PX
SortUtil.swap(queue,j,k); X"khuyT_
k = j; 8JFkeU%yO
} ah6F^Kpl{
} %k;FxUKi
+!V%Q
} DIu72\
gmAKW4(
} z#E,96R
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SortUtil： ohtn^o;C}
j&G~;(DY
package org.rut.util.algorithm; cV!/
(_n8$3T75
import org.rut.util.algorithm.support.BubbleSort; l<K.!z<-:8
import org.rut.util.algorithm.support.HeapSort; h}%M
import org.rut.util.algorithm.support.ImprovedMergeSort; MVL }[J
import org.rut.util.algorithm.support.ImprovedQuickSort; tAu|8aL
import org.rut.util.algorithm.support.InsertSort; B?YfOSF=5
import org.rut.util.algorithm.support.MergeSort; W%XS0k}x
import org.rut.util.algorithm.support.QuickSort; ?oDfI
import org.rut.util.algorithm.support.SelectionSort; l'{goyf
import org.rut.util.algorithm.support.ShellSort; Y)5uK:)^
rnBeL _8C
/** 4a\+o]
* @author treeroot ]jY)M<:J4
* @since 2006-2-2 n]{}C.C=
* @version 1.0 |b;M5w?
*/ 6C51:XQO
public class SortUtil { oD}FJvV
public final static int INSERT = 1; WT {Cjn
public final static int BUBBLE = 2; Vq7 kA "
public final static int SELECTION = 3; "yq;{AGOGl
public final static int SHELL = 4; \w_[tPz}
public final static int QUICK = 5; >E,L"&_j
public final static int IMPROVED_QUICK = 6; BHE =Zo
public final static int MERGE = 7; np>!lF:
public final static int IMPROVED_MERGE = 8; KeOBbe
public final static int HEAP = 9; kuud0VWJ
MGC0^voe
public static void sort(int[] data) { EkAqFcKLq
sort(data, IMPROVED_QUICK); yrYaKh
} l3|>*szX
private static String[] name={ gV44PI6h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9*Twx&
}; iR5soIR
E|uXi)!.x
private static Sort[] impl=new Sort[]{ \*"0wR;[K
new InsertSort(), 4sE=WPKF#
new BubbleSort(), z'K7J'(R
new SelectionSort(), G}xBYc0b
new ShellSort(), N)y;owgo
new QuickSort(), l YA+k5
new ImprovedQuickSort(), %|* y/m
new MergeSort(), #YVDOR{z
new ImprovedMergeSort(), 1;[ <||K
new HeapSort() XN%D`tbvJ
}; 3:Egqw
$/#)
public static String toString(int algorithm){ ]Oh>ECA|D
return name[algorithm-1]; CrX-?$
} ?iO^b.'I#
7IW7'klkvD
public static void sort(int[] data, int algorithm) { \mit&EUh}
impl[algorithm-1].sort(data); kV%y%l(6
} ,^66`C[G
ywtDz8!^u
public static interface Sort { +Ws}a
public void sort(int[] data); EMH}VigR
} Cu<ojN- $
.z7f_KX^
public static void swap(int[] data, int i, int j) { pnb$lpxt
int temp = data; iZ;jn8
data = data[j]; #{`NJ2DU]
data[j] = temp; {"(|oIo{
} kZEy
} n,%^R