[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; }K&K{ 9}
} 6*]Kow?
int i1=l; $?'z%a{
int i2=mid+1; 778L[wYe
for(int cur=l;cur<=r;cur++){ UQTt;RS*zS
if(i1==mid+1) bJe^x;J9
data[cur]=temp[i2++]; 9@:&E
else if(i2>r) uQ&xoDCB
data[cur]=temp[i1++]; 4q~l?*S
else if(temp[i1] data[cur]=temp[i1++]; %K/rPhU
else Bp4QHv9xqL
data[cur]=temp[i2++]; KH@M & >=^
} us5`?XeX]
} O'!k$iJNb
CBO8^M<K
} #"f:m`
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改进后的归并排序: a_pkUOu6
s+0$_&xR
package org.rut.util.algorithm.support; 6?hv,^
Q.cxen
import org.rut.util.algorithm.SortUtil; FiIN\
!H.&"~w@
/** IOfo]p-
* @author treeroot ~v<r\8`OI2
* @since 2006-2-2 r_R|.fl<[
* @version 1.0 rT"8e*LT
*/ BD9` +9
public class ImprovedMergeSort implements SortUtil.Sort { ;((gmg7,
)6!SFj>.O
private static final int THRESHOLD = 10; OBj.-jL
snN1
/* g*^"x&
* (non-Javadoc) !8P#t{2_|
* ch< zpo:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B4J^ rzK
*/ VS 8|lgQ
public void sort(int[] data) { {kmaMP
int[] temp=new int[data.length]; )"f>cYF
mergeSort(data,temp,0,data.length-1); Q&n|tQ*4
} v 7Pv&|
<H#D/?n5
private void mergeSort(int[] data, int[] temp, int l, int r) { 'g ,Oi1|~
int i, j, k; 44S<(Re
int mid = (l + r) / 2; M,mj{OY~x
if (l == r) "-I>
return; ImvkB~8N
if ((mid - l) >= THRESHOLD) 5+VdZ'@
mergeSort(data, temp, l, mid); ;ATk?O4T
else i?mDR$X:
insertSort(data, l, mid - l + 1); 6!+"7r6
if ((r - mid) > THRESHOLD) gS"@P:wYzs
mergeSort(data, temp, mid + 1, r); {;z3$/JB
else )V9$ P)
insertSort(data, mid + 1, r - mid); d5bj$oH
:*4yR46
for (i = l; i <= mid; i++) { /V3*[
temp = data; Z1q'4h=F.
} *]F3pP[
for (j = 1; j <= r - mid; j++) { 3>?ip;
temp[r - j + 1] = data[j + mid]; g#Yqw
} A0&~U0*(~
int a = temp[l]; 9]hc{\
int b = temp[r]; {Y\hr+A
for (i = l, j = r, k = l; k <= r; k++) { ,`H=%#
if (a < b) { 'jmcS0f -
data[k] = temp[i++]; dJCu`34Y'|
a = temp; uOZ+9x(
} else { lr^-
data[k] = temp[j--]; KnU"49
b = temp[j]; EmY8AN(*
} jixU9]
} fzSZ>I0R
} x}F.<`
{V:?r
/** qr6WSBc
* @param data '3|OgV
* @param l @tp/0E?
* @param i V1j&>-]]9*
*/ -4X,x
private void insertSort(int[] data, int start, int len) { \Z57UNI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UVU}
} ^3*gf}
} h=)Im)
} 6 *Q5.g
} tF`>.=
tT'd]
堆排序： {feS-.Khv
- FE)
package org.rut.util.algorithm.support; x6F\|nb
!.p!
import org.rut.util.algorithm.SortUtil; @Z.Ne:*J
iiRK3m
/** Fbk<qQH
* @author treeroot '8%aq8
* @since 2006-2-2 (U-p&q>z
* @version 1.0 hWDgMmo7
*/ V+D"_
public class HeapSort implements SortUtil.Sort{ >} aykz*g
W*8D@a0 _
/* (non-Javadoc) $\a;?>WA"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bt.W_p
*/ =U@*adgw
public void sort(int[] data) { {4:En;
MaxHeap h=new MaxHeap(); #=$4U!yL
h.init(data); a^sR?.+3
for(int i=0;i h.remove(); F3wRHq
System.arraycopy(h.queue,1,data,0,data.length); M2V.FYV{j>
} *TMg.
{\0R[+d
private static class MaxHeap{ /:%^Vh3XF
q^12Rj;H
void init(int[] data){ tkJ/h<
this.queue=new int[data.length+1]; : l]>nF4
for(int i=0;i queue[++size]=data; 9|'bPOKe
fixUp(size); VgoQz]z
} E$Ge# M@dM
} Y*"%;e$tg
xD_jfAH'
private int size=0; 2RM1-j ($
gqe z-
private int[] queue; Jl5<9x
c&R.
public int get() { .+B!mmp
return queue[1]; Fs&m'g
} TF3Tha]
OFUN hbg
public void remove() { dQizM^j
SortUtil.swap(queue,1,size--); H) (K
fixDown(1); pX*mX]
} [ BN2c
file://fixdown <{cPa\
private void fixDown(int k) { u1<xt1K
int j; $_)f|\s
while ((j = k << 1) <= size) { <[pU rJfTr
if (j < size %26amp;%26amp; queue[j] j++; d$Mj5wN:q
if (queue[k]>queue[j]) file://不用交换 zpa'G1v
break; [N$@nA-d
SortUtil.swap(queue,j,k); *nC<1.JW
k = j; 7s[ ATu
} NT8%{>F`
} gW*ee
private void fixUp(int k) { ^?juY}rZ=|
while (k > 1) { WUqAPN
int j = k >> 1; VUx~Y'b
if (queue[j]>queue[k]) +)7NWR\
break; {0QA+[Yd&!
SortUtil.swap(queue,j,k); WG^D$L:
k = j; Vm6G5QwM
} `;4P?!WG
} \];0S4SBy
W"+*%x
} "5u*C#T2$
BpZE
} u HqPb8
" m<]B
SortUtil： 6Y0k}+j|>E
SuU,SE'TX
package org.rut.util.algorithm; n=l>d#}$%T
x?Doe`/6?
import org.rut.util.algorithm.support.BubbleSort; E&P'@'Yk
import org.rut.util.algorithm.support.HeapSort; NL 3ri7n
import org.rut.util.algorithm.support.ImprovedMergeSort; Y&KI/]ly,L
import org.rut.util.algorithm.support.ImprovedQuickSort; \ni?_F(Y
import org.rut.util.algorithm.support.InsertSort; A;n3""
import org.rut.util.algorithm.support.MergeSort; 9 o6ig>C
import org.rut.util.algorithm.support.QuickSort; 9F)+p7VJq
import org.rut.util.algorithm.support.SelectionSort; n#XiCo_\
import org.rut.util.algorithm.support.ShellSort; /)Bk r/
DZ -5A
/** HtB>#`'
* @author treeroot 0]=|3-n
* @since 2006-2-2 _Q,`Qn@|BD
* @version 1.0 fqA\Rp6Z
*/ j'FSd*5m
public class SortUtil { p'fq&a+
public final static int INSERT = 1; M_*"g>Z
public final static int BUBBLE = 2; ec+&K?T
public final static int SELECTION = 3; V @8+
public final static int SHELL = 4; p/L|;c
public final static int QUICK = 5; ?U.+SQ
public final static int IMPROVED_QUICK = 6; hAtf)
public final static int MERGE = 7; 5xe}ljo
public final static int IMPROVED_MERGE = 8; &?flH;
public final static int HEAP = 9; , f{<
WzZ<ZCHm
public static void sort(int[] data) { V/"UDof
sort(data, IMPROVED_QUICK); ^.)oQo SE
} F8mS5oB|^
private static String[] name={ L#mf[a@pCn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HZC^Q7]hy
}; fTd=}zY
O_}R~p
private static Sort[] impl=new Sort[]{ NovF?kh2
new InsertSort(), "/[xak!g
new BubbleSort(), low 0@+Q
new SelectionSort(), >Lj0B%^EvM
new ShellSort(), chk1tFV
new QuickSort(), _K["qm{X_
new ImprovedQuickSort(), -J*BY2LU3f
new MergeSort(), dPZrX{ c
new ImprovedMergeSort(), NQ~keN
new HeapSort() 5e=9~].7
}; Hy=';Ccn}
l =~EweuM
public static String toString(int algorithm){ 5<ZE.'O
return name[algorithm-1]; 4FUY1p
} }-QFMPXhG
I^S gWC
public static void sort(int[] data, int algorithm) { 0'q&7 MV
impl[algorithm-1].sort(data); y,'M3GGl
} `L# pN5
KBJ%$OQV
public static interface Sort { ScOiOz:Ha
public void sort(int[] data); |8^53*f ?
} 2GeJ\1k
art L
public static void swap(int[] data, int i, int j) { LkYcAY$w
int temp = data; R5OP=Q8
data = data[j]; r Q)?Bhf
data[j] = temp; ZLm?8g6-
} nk=+6r6
} *UBukn