[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; 7xidBVx
} z/yNFY]i
int i1=l; %7WGodlXW
int i2=mid+1; *^+8_%;1
for(int cur=l;cur<=r;cur++){ qELy'\
if(i1==mid+1) $|-joY
data[cur]=temp[i2++]; }cuU5WQ?%
else if(i2>r) }_m/3*x_
data[cur]=temp[i1++]; ]Gm"U!h*
else if(temp[i1] data[cur]=temp[i1++]; LRl2@&z<
else 70IBE[T&
data[cur]=temp[i2++]; >DqV^%2l
} jA9&hbQuL
} ak]:ir`o
ea!_/Y
} ,q$'hYTaJ
i|A0G%m]$
改进后的归并排序: x%HX0= (
CPGiKE
package org.rut.util.algorithm.support; 8V$pdz|[
4,kdP)Md$
import org.rut.util.algorithm.SortUtil; {1a%CsCM
!0Hx1I<*x
/** :(gZ\q">k
* @author treeroot dNd(57
* @since 2006-2-2 oqeA15k$
* @version 1.0 %!Z9: +;B
*/ {x$WBy9
public class ImprovedMergeSort implements SortUtil.Sort { 3gN#[P
;#a^M*e
private static final int THRESHOLD = 10; zyb>PEd.
GSck^o2{
/* ^i>Tm9vM
* (non-Javadoc) Bg.~#H
* &|cg`m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hg<d%7.
*/ VnqgN
public void sort(int[] data) { _Ec9g^I10
int[] temp=new int[data.length]; Kxs_R#k
mergeSort(data,temp,0,data.length-1); >6xZF'4
} >drG,v0qh
X.^S@3[
private void mergeSort(int[] data, int[] temp, int l, int r) { R0|dKKzS
int i, j, k; h$3o]~t
int mid = (l + r) / 2; a'3|EWS ?
if (l == r) K1i@.`na/$
return; B.)!zv\{
if ((mid - l) >= THRESHOLD) 53>y<
mergeSort(data, temp, l, mid); DL$O274uZ
else ,ru2C_LQ
insertSort(data, l, mid - l + 1); T\Zf`.mt
if ((r - mid) > THRESHOLD) [N]5)n
mergeSort(data, temp, mid + 1, r); S3Q^K.e?
else `1;m:,9
insertSort(data, mid + 1, r - mid); !kAjne8]d
E8$k}I
for (i = l; i <= mid; i++) { j0^%1
temp = data; SvE3E$*
} !$}:4}56F
for (j = 1; j <= r - mid; j++) { <UI^~Azc#
temp[r - j + 1] = data[j + mid]; |]s/NNU
} 9eG{"0)
int a = temp[l]; s.VtmAH
int b = temp[r]; l-?B1gd,l
for (i = l, j = r, k = l; k <= r; k++) { ]mO$Tg&s~
if (a < b) { L-J 7z+{
data[k] = temp[i++]; aNd6#yU$
a = temp; A5U//y![{
} else { S}QvG&c
data[k] = temp[j--]; \53(D7+
b = temp[j]; Ph{7S43
} =v-qao7xCV
} uO=yQ&
} hn-+]Y:
*2nQZ^c.
/** .x6c.Y.S
* @param data #J4{W84B
* @param l W|C>X=zTi
* @param i #kho[`9
*/ o|r8x_!+
private void insertSort(int[] data, int start, int len) { gzV&S5A{_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xLZJ[:gr
} kBF.TGT[l
} /#WRd}IjK
} a| w.G "W
} W8bh49
yiourR)H<
堆排序： uP;qs8
R;XG2
package org.rut.util.algorithm.support; by*?PhfF
V?_:-!NJ(
import org.rut.util.algorithm.SortUtil; 3 VNPdXsh
:9nqQJ+~
/** i-kj6N5
* @author treeroot ^a,Oi%
* @since 2006-2-2 3mmp5 d
* @version 1.0 }vx+/J
*/ fLGZ@-qA0
public class HeapSort implements SortUtil.Sort{ pv LA:LW2
^v5v7\!
/* (non-Javadoc) }MW7,F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2=?:(e9
*/ fv;3cxQp
public void sort(int[] data) { |<:Owd=
MaxHeap h=new MaxHeap(); kK62yz,
h.init(data); <in#_Of{E
for(int i=0;i h.remove(); 0ZRIi70u
System.arraycopy(h.queue,1,data,0,data.length); *!mT#Vm^
} q4Rvr[
1$+-?:i C
private static class MaxHeap{ CP5vo-/)-
x-hr64WFK
void init(int[] data){ /y2)<{{I
this.queue=new int[data.length+1]; p'@|Oq&
for(int i=0;i queue[++size]=data; Y! 8 I
fixUp(size); 3izGMH_`
} utH/E7^8
} F=T};b
seNJ6p=`
private int size=0; +1uAzm4SL
\E}YtN#
private int[] queue; 2cnyq$4k
j'\!p):H
public int get() { f*(W%#*|
return queue[1]; Q/u2Q;j>
} 0`=>/Wr39
&1ZqC;
public void remove() { xAZ-_}'tW
SortUtil.swap(queue,1,size--); _klT
fixDown(1); e-@.+f2CC
} sWG_MEbu
file://fixdown W`vgH/lSnZ
private void fixDown(int k) { _"4u?C#
int j; -g5o+RT@
while ((j = k << 1) <= size) { xE{PsN1 X;
if (j < size %26amp;%26amp; queue[j] j++; per$%;5E"
if (queue[k]>queue[j]) file://不用交换 k Q Sx65
break; R&vV!d
SortUtil.swap(queue,j,k); 2oO&8:`tv
k = j; ?FV>[&-h#I
} Oh&k{DWE$
} 6=aXz2.f
private void fixUp(int k) { !e<D2><^
while (k > 1) { .+.'TY--
int j = k >> 1; 8lNkY`P7s
if (queue[j]>queue[k]) 3EVAB0/$
break; U8||)+
SortUtil.swap(queue,j,k); %}`zq8Q;
k = j; _MmSi4]yd
} [yyL2=7
} $'I-z.GV
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} XCP/e p
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} =sIkA)"!=
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SortUtil： 8AGP*"gI
Y|3n^%I
package org.rut.util.algorithm; uOv0ut\\G
:(?F(Q^
import org.rut.util.algorithm.support.BubbleSort; Y!1x,"O'H
import org.rut.util.algorithm.support.HeapSort; gfPR3%EXs
import org.rut.util.algorithm.support.ImprovedMergeSort; 'xG:v)(
import org.rut.util.algorithm.support.ImprovedQuickSort; eX0due
import org.rut.util.algorithm.support.InsertSort; DI)!x {"
import org.rut.util.algorithm.support.MergeSort; Q7{/ T0
import org.rut.util.algorithm.support.QuickSort; ';vLj1v
import org.rut.util.algorithm.support.SelectionSort; _U<r@
import org.rut.util.algorithm.support.ShellSort; E3~Wyfd7
?D,8lABkT
/** |[3%^!f\
* @author treeroot xNAa,aMM
* @since 2006-2-2 K}feS(Ji
* @version 1.0 x^959QO~
*/ ^sP-6 ^
public class SortUtil { "<=HmE-;
public final static int INSERT = 1; #GVf+8"
public final static int BUBBLE = 2; 02F\1fXS
public final static int SELECTION = 3; 0!5w0^1
public final static int SHELL = 4; Vx#n0z
public final static int QUICK = 5; UVUoXv)N
public final static int IMPROVED_QUICK = 6; ,ozgnhZY
public final static int MERGE = 7; eKv{N\E
public final static int IMPROVED_MERGE = 8; u$MXO].Q
public final static int HEAP = 9; 4\pUA4
Tw]].|^f-
public static void sort(int[] data) { B]lM69Hz
sort(data, IMPROVED_QUICK); {Y6;/".DM
} ETMF.-P
private static String[] name={ "oLY";0(=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A?;KfVq
}; vFx0B?
0)0,&@])7
private static Sort[] impl=new Sort[]{ I%b}qC"5M
new InsertSort(), 6E))4 lW
new BubbleSort(), D\LXjEme.
new SelectionSort(), P:QSr8K
new ShellSort(), <?E~Qc t
new QuickSort(), Oe_*(q&
new ImprovedQuickSort(), `%<^$Ng;
new MergeSort(), ~6!TMVr
new ImprovedMergeSort(), 5f-eWW]!
new HeapSort() tXg>R _\C
}; L Rn)
p3W-*lE
public static String toString(int algorithm){ CYHo~VIK
return name[algorithm-1]; g54b}vzm
} F4|U\,g
U^~jB= =]
public static void sort(int[] data, int algorithm) { sqE? U*8.-
impl[algorithm-1].sort(data); ]N4?*S*jd)
} JIh:IR(ta
RbN# dI'
public static interface Sort { 9J(jbJ7p
public void sort(int[] data); Pq<]`9/w^w
} )ePQN~#K}
lG/h[
public static void swap(int[] data, int i, int j) { d>-k-X-[
int temp = data; 0)HZ5^J
data = data[j]; AD0pmD
data[j] = temp; cd3;uB4\,
} ZGgM-O1
} L; (J6p]h