[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; o(I[_oUy\
} P]@m0f
int i1=l; [fU2$(mT+
int i2=mid+1; )MKzAAt~
for(int cur=l;cur<=r;cur++){ tGs=08`
if(i1==mid+1) \=yx~c_$L
data[cur]=temp[i2++]; / 1jb8w'
else if(i2>r) Tv&-n
data[cur]=temp[i1++]; {1y-*@yU(
else if(temp[i1] data[cur]=temp[i1++]; ^rc!X]C9
else 0 pHqNlb
data[cur]=temp[i2++]; Dm1;mRS+
} y+XB
} n(gw%w+\7
I =t{ u;
} Zq--m/
9@-^!DBM
改进后的归并排序: P!{ O<P
I T)rhi:
package org.rut.util.algorithm.support; i[~oMwc&
mk;l;!*T8
import org.rut.util.algorithm.SortUtil; zhDmZ
`V@{#+X
/** u$N2uFc
* @author treeroot c%aY6dQG&%
* @since 2006-2-2 $^Dx4:k<2
* @version 1.0 3+;}2x0-F
*/ pNo<:p
public class ImprovedMergeSort implements SortUtil.Sort { 05\A7.iy
{iqH 27\E
private static final int THRESHOLD = 10; h,q%MZ==^s
L_.BcRy
/* 9IKFrCO9,
* (non-Javadoc) aZYa<28?L%
* dE*n!@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =>Vo|LBoe
*/ )POuH*j
public void sort(int[] data) { r[zxb0YA
int[] temp=new int[data.length]; 1FS Jqad
mergeSort(data,temp,0,data.length-1); \k1psqw^O
} 6=kA
zA&lJD$0
private void mergeSort(int[] data, int[] temp, int l, int r) { Kc*h@#`~oL
int i, j, k; v?)-KtX|
int mid = (l + r) / 2; e`#c[lbAAM
if (l == r) Y?2I /
return; f~u]fpkz
if ((mid - l) >= THRESHOLD) 4}{HRs?
mergeSort(data, temp, l, mid); SLL%XF~/Sb
else q@ >s#
insertSort(data, l, mid - l + 1); jd$uOn.r
if ((r - mid) > THRESHOLD) :J-@+_J
mergeSort(data, temp, mid + 1, r); <h2WM (n
else =uZ[
insertSort(data, mid + 1, r - mid); =Uta5$\a)
LqTyE
for (i = l; i <= mid; i++) { s% "MaDz
temp = data; /a%5!)NE%
} &,xN$
for (j = 1; j <= r - mid; j++) { h#?L6<*tm
temp[r - j + 1] = data[j + mid]; UfEF>@0
} I=wP"(2
int a = temp[l]; kScq#<Y&
int b = temp[r]; #J]u3*Tn|
for (i = l, j = r, k = l; k <= r; k++) { dF*@G/p>V
if (a < b) { y88FT#hR|5
data[k] = temp[i++]; ZD] ^Y}
a = temp; EZz Ox(g
} else { @<e+E"6
data[k] = temp[j--]; ]5lp.#EB
b = temp[j]; =yiRB?
} Z&%#,0>]
} w4 <FC$
} oBr/CW
vBUx)l
/** 2/qP:3)
* @param data "#2z 'J
* @param l S*6P=O*
* @param i 1Tf"<Dp
*/ pGz-5afL
private void insertSort(int[] data, int start, int len) { sB ]~=vUP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kC"<4U
} Uu{I4ls6B
} 6)m}e?D>
} t5#IiPp
} o`HZS|>K*
IpmblC4
堆排序： >v@R]9
wxXp(o(
package org.rut.util.algorithm.support; S1{UVkr
JS r& S[
import org.rut.util.algorithm.SortUtil; 1FUadSB5)
HcA;'L?Dw
/** 9@ 6y(#s
* @author treeroot )_OKw?Zi
* @since 2006-2-2 z%;b-PpS
* @version 1.0 gmy$_4+6o
*/ F0%FX`b{{
public class HeapSort implements SortUtil.Sort{ j`A%(()d
s<[%76Y!
/* (non-Javadoc) (,`ypD+3q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f( 5c
*/ @Hj5ZJ 3
public void sort(int[] data) { 1+RG@Cp
MaxHeap h=new MaxHeap(); m5SJB]a/
h.init(data); 7.$0LN/a!Z
for(int i=0;i h.remove(); pw*<tXH!
System.arraycopy(h.queue,1,data,0,data.length); V} Y %9V
} 7y:%^sl
[f}YXQ0N)
private static class MaxHeap{ mOr>*uR
Cfu]umZLn
void init(int[] data){ VS<E?JnbFV
this.queue=new int[data.length+1]; [s$vY~_
for(int i=0;i queue[++size]=data; Qx|m{1~-
fixUp(size); xz5Jli
} W}bed],l
} 5\}A8Ng
Tw"u{%t
private int size=0; BRbx.
N"/jn_>+j
private int[] queue; wl #Bv,xf
[ps5;
public int get() { R)d1]k8
return queue[1]; 5*u0VabC<
} XRCiv
s~$ZTzV
public void remove() { [ !/u,
SortUtil.swap(queue,1,size--); 6lOT5C eJ"
fixDown(1); UVlD]oXKh
} ,\q9>cZ!
file://fixdown n#XiCo_\
private void fixDown(int k) { m07= _4
int j; HtB>#`'
while ((j = k << 1) <= size) { St9W{
if (j < size %26amp;%26amp; queue[j] j++; z[X>>P3<n
if (queue[k]>queue[j]) file://不用交换 13wO6tS k
break; `"zXf-qeE
SortUtil.swap(queue,j,k); F|3Te?_
k = j; Gs;wx_k^
} mH2XwA|
} 9HrT>{@
private void fixUp(int k) { os0fwv
while (k > 1) { fVx<f.xuW
int j = k >> 1; |;e K5(|
if (queue[j]>queue[k]) UZ7Zzc#g
break; :,%~R2
SortUtil.swap(queue,j,k); (CFm6p'RZ
k = j; *Z\B9mx
} ,Bax0p
} 5'wWj}0!%
_0dm?=
} K8M[xaI@
W5 ^eCYHoi
} ,Z*&QR
[AkL6
SortUtil： /W\@/b,
.anXsjD%W
package org.rut.util.algorithm; Z6C!-a
6D3hX>K4
import org.rut.util.algorithm.support.BubbleSort; TLbnG$VQS
import org.rut.util.algorithm.support.HeapSort; L!G]i;=:
import org.rut.util.algorithm.support.ImprovedMergeSort; -P#PyZEH&I
import org.rut.util.algorithm.support.ImprovedQuickSort; >tc#Ofgzd
import org.rut.util.algorithm.support.InsertSort; R5OP=Q8
import org.rut.util.algorithm.support.MergeSort; zA/tHlKc
import org.rut.util.algorithm.support.QuickSort; ]S!:p>R
import org.rut.util.algorithm.support.SelectionSort; -Uj)6PzGu
import org.rut.util.algorithm.support.ShellSort; C#<b7iMg
,5}%_
/** ! Rrk
* @author treeroot NMJX `
* @since 2006-2-2 i2.g}pM.A
* @version 1.0 b)ytm=7ha
*/ pUbf]3 t
public class SortUtil { %-9?rOr
public final static int INSERT = 1; ,', S
public final static int BUBBLE = 2; V+`gkWe/
public final static int SELECTION = 3; 24{Tl q3
public final static int SHELL = 4; iM \3~3'
public final static int QUICK = 5; 7\(mn$
public final static int IMPROVED_QUICK = 6; J>D+/[mFt
public final static int MERGE = 7; c,@&Z#IZ`
public final static int IMPROVED_MERGE = 8; 7Yv1et |
public final static int HEAP = 9; Y=G9|7*lO
@QOlo-u
public static void sort(int[] data) { /wAx#[c[
sort(data, IMPROVED_QUICK); QjT$.pUd
} au=A+
private static String[] name={ yV"k:_O{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" b0VEMu81k
}; 6ijL+5
B'NtG84
private static Sort[] impl=new Sort[]{ stxei 6
new InsertSort(), I:|<};mm
new BubbleSort(), l<3X:)
new SelectionSort(), Fh8 8DDJ
new ShellSort(), "mk@p=d
new QuickSort(), [|qV*3|?
new ImprovedQuickSort(), ?.{SYaS
new MergeSort(), IL0e:-@!0
new ImprovedMergeSort(), 8'sT zB]
new HeapSort() r!+..c
}; fk*I}pDx
gDN7ly]6M
public static String toString(int algorithm){ %3%bRP
return name[algorithm-1]; rtSG-_[i
} b#%$y
F>F2Yql&W
public static void sort(int[] data, int algorithm) { B3^F $6=
impl[algorithm-1].sort(data); #zf,%IYF
} Tv[|^G9x
u+7S/9q8
public static interface Sort { QjlQsN!
public void sort(int[] data); }AW"2<@
} tFEY8ut{
Rs@>LA
public static void swap(int[] data, int i, int j) { WqO4_;X6/
int temp = data; gf ?_tB0C
data = data[j]; +dG3/vV
data[j] = temp; A+=K<e
} tE8aL{<R
} =vs]Kmm