[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; Lh-+i
} Tdxc%'l
int i1=l; )_kU,RvZ
int i2=mid+1; m'KEN<)s
for(int cur=l;cur<=r;cur++){ ll ^I;o0
if(i1==mid+1) RgD:"zeM
data[cur]=temp[i2++]; XzW\p8D^u
else if(i2>r) L*6>S_l[
data[cur]=temp[i1++]; ;ykX]5jGh
else if(temp[i1] data[cur]=temp[i1++]; bSW~hyI w
else "`V:4uz
data[cur]=temp[i2++]; zUA -
} G%dzJpC(
} ]4Q~x
# ';b>J
} MFz6y":~
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改进后的归并排序: b2^O$l
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package org.rut.util.algorithm.support; ^3C%&
fM3ZoH/
import org.rut.util.algorithm.SortUtil; RijFN.s
R=C+]
/** g6H`uO
* @author treeroot brdY97s4
* @since 2006-2-2 n],"!>=+
* @version 1.0 @Ll^ze&HI
*/ \98|.EG
public class ImprovedMergeSort implements SortUtil.Sort { {tuGkRY2~
UAds$9
private static final int THRESHOLD = 10; hM[I}$M&O
JD~]aoH
/* KkSv23In
* (non-Javadoc) #;\tgUQ
* in>?kbaG+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Np?/r}
*/ rW2l+:@c
public void sort(int[] data) { -e.ygiK.`S
int[] temp=new int[data.length]; BAy)P1
mergeSort(data,temp,0,data.length-1); >L^2Z*
} AQs_(LR
Ku8qn\2"
private void mergeSort(int[] data, int[] temp, int l, int r) { }q)dXFL=I#
int i, j, k; DuRC1@e
int mid = (l + r) / 2; {;={abj
if (l == r) 9-.`~v
return; 5r^u7k
if ((mid - l) >= THRESHOLD) 2SYV2
mergeSort(data, temp, l, mid); Cp]q>lM"
else GC@U['
insertSort(data, l, mid - l + 1); CMfR&G,)
if ((r - mid) > THRESHOLD) `o%Ua0x2
mergeSort(data, temp, mid + 1, r); 2*Mu"v,
else e9eBD
insertSort(data, mid + 1, r - mid); ;h4w<OqcM
|EFbT>
for (i = l; i <= mid; i++) { 8'0KHn{#
temp = data; `7_s@4:
} `%.x0~ih
for (j = 1; j <= r - mid; j++) { k&o1z'<C
temp[r - j + 1] = data[j + mid]; gP=@u.
} Gx-tPW}
int a = temp[l]; $u{ 8wF/)
int b = temp[r]; ^S^7u
for (i = l, j = r, k = l; k <= r; k++) { &Fl*,
if (a < b) { .*L_*}tno
data[k] = temp[i++]; 'Inqa;TQz
a = temp; 88+J(^y>
} else { r%II` i
data[k] = temp[j--]; CQ#%v%
b = temp[j]; 5x}OrfDU
} vH vwH
} Nk shJ2
} %|3NCyJ*7
z.*=3
/** ETq~,g'
* @param data -42jeJS
* @param l ?N@p~ *x
* @param i _pR7sNeV
*/ / Hexv#3
private void insertSort(int[] data, int start, int len) { x2z%J,z@4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g/x\#W
} !J+< M~o}
} B#(2,j7M
} M2y"M,k4
} /yL:_6c-
A[X~:p.^G
堆排序： Js!V,={iX
%/=#8v4*
package org.rut.util.algorithm.support; I)F3sS45}
( O/+.qb
import org.rut.util.algorithm.SortUtil; }&Jml%F4uR
,a?$F1Z-
/** |.[4$C
* @author treeroot r!J?Lc])8
* @since 2006-2-2 ejC== Fkc
* @version 1.0 Gv zw=~8
*/ `Hq)g1a7q
public class HeapSort implements SortUtil.Sort{ qlfYX8edZ
9% AL f 9
/* (non-Javadoc) e{33%5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZCS{D
*/ ]o\y(!
public void sort(int[] data) { sz%'=J~!V
MaxHeap h=new MaxHeap(); VC@{cVT
h.init(data); Xm}~u?$3
for(int i=0;i h.remove(); VwV`tKit
System.arraycopy(h.queue,1,data,0,data.length); fdRw:K8
} |,Xrt8O/[
pg'3j3JW$
private static class MaxHeap{ |KxFiH
GP\Pk/E
void init(int[] data){ 4#BoS9d2I<
this.queue=new int[data.length+1]; xl~%hwBd
for(int i=0;i queue[++size]=data; ZNvnVW<
fixUp(size); +]%d'h
} uM9[
} T7{Z0-
+\a`:QET
private int size=0; Ll !J!{
S@a#,,\[
private int[] queue; dM1)wkbET
Cq,ox'kGl
public int get() { 1>SCY_Cv
return queue[1]; OO:^#Mvv5
} L27i_4E,
[fU2$(mT+
public void remove() { '_~=C-g
SortUtil.swap(queue,1,size--); t$z FsFTQ
fixDown(1); |*im$[g=-
} "gD)Uis
file://fixdown !v2D 18(
private void fixDown(int k) { 12Hy.l
int j; \Om< FH}
while ((j = k << 1) <= size) { z Lw=*
if (j < size %26amp;%26amp; queue[j] j++; VR/>V7*7@
if (queue[k]>queue[j]) file://不用交换 J['paHSF
break; 5CxD ys&<
SortUtil.swap(queue,j,k); &r6VF/
k = j; %jK-}0Tu
} c D+IMlT
} Mlp[xk|
private void fixUp(int k) { '[fo
while (k > 1) { VR>;{>~
int j = k >> 1; fL8+J]6A6
if (queue[j]>queue[k]) p*rBT,'
break; pNo<:p
SortUtil.swap(queue,j,k); 05\A7.iy
k = j; {iqH 27\E
} h,q%MZ==^s
} L_.BcRy
;K:)R_H
} aZYa<28?L%
dE*n!@
} ;wfzlUBC
Nt^R~#8hF>
SortUtil： mJu;B3@
\k1psqw^O
package org.rut.util.algorithm; J(0.eD91v
$-$^r;
import org.rut.util.algorithm.support.BubbleSort; zLlu%Oc
import org.rut.util.algorithm.support.HeapSort; f~u]fpkz
import org.rut.util.algorithm.support.ImprovedMergeSort; Yw=Ve 0
import org.rut.util.algorithm.support.ImprovedQuickSort; xn&G`
import org.rut.util.algorithm.support.InsertSort; F7`3,SzHp
import org.rut.util.algorithm.support.MergeSort; 0+0+%#?
import org.rut.util.algorithm.support.QuickSort; tt`j!!
import org.rut.util.algorithm.support.SelectionSort; A e&t#,)
import org.rut.util.algorithm.support.ShellSort; yVm~5Y&Z
k~u$&a
/** x-k}RI
* @author treeroot ^o]ZDc
* @since 2006-2-2 g*b`V{/Vw
* @version 1.0 V+X>t7.Q
*/ nZa.3/7dJ
public class SortUtil { D*Y4B?,
public final static int INSERT = 1; {Q[{H'Oa
public final static int BUBBLE = 2; @^:R1c![s
public final static int SELECTION = 3; o~,dkV
public final static int SHELL = 4; ja}_u}:
public final static int QUICK = 5; {[PoLOCI
public final static int IMPROVED_QUICK = 6; D[m;rcl
public final static int MERGE = 7; |k:MXI
public final static int IMPROVED_MERGE = 8; l [?o du4
public final static int HEAP = 9; M"2Tuwz
n'{cU(
public static void sort(int[] data) { *D1^Se
sort(data, IMPROVED_QUICK); ]'=]=o~4
} S1&mY'c
private static String[] name={ ozF>2`K }
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bR6.Xdt.n
}; R+FBCVU&TJ
^$SI5WK&)
private static Sort[] impl=new Sort[]{ &Vfdq6Y]
new InsertSort(), LFob1HH*8
new BubbleSort(), 0'`>20Y
new SelectionSort(), Iodk1Y;
new ShellSort(), >6Y\CixN
new QuickSort(), /=A?O\B7
new ImprovedQuickSort(), ('pNAn!]
new MergeSort(), ~isrE;N1|
new ImprovedMergeSort(), k/YEUC5
new HeapSort() q?g4**C
}; m'k.R j
Vm6G5QwM
public static String toString(int algorithm){ H#x=eDU|k
return name[algorithm-1]; \Q<c Y<
} 7OX5"u!2
PI(;t9]b
public static void sort(int[] data, int algorithm) { b;#3X)
impl[algorithm-1].sort(data); wl #Bv,xf
} 5G cdz
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public static interface Sort { 2`I" QU
public void sort(int[] data); An!1>`8r
} vO!p8r F
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public static void swap(int[] data, int i, int j) { }z1aKa9
int temp = data; jIwz G+)$P
data = data[j]; sL|*0,#K
data[j] = temp; wgxr8;8`q
} FjqoO.
} ?47q0C