[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; Q[tz)99~
} 8so}^2hTlT
int i1=l; -z1o~~
int i2=mid+1; 30`H Xv@
for(int cur=l;cur<=r;cur++){ SYLkC [0k
if(i1==mid+1) G=Bj1ss.
data[cur]=temp[i2++]; NH6!|T
else if(i2>r) {'aqOlw3<j
data[cur]=temp[i1++]; s_kd@?=`x
else if(temp[i1] data[cur]=temp[i1++]; (:]iHg3
else D"5~-9<
data[cur]=temp[i2++]; .W:], 5e
} NO1]JpR
} c3-bn #
m':m`,c!
} <-7Ha_#
;yrcH+I$_
改进后的归并排序: Z6pDQ^Ii
24l9/v'
package org.rut.util.algorithm.support; $"1&!
NKYyMHv6
import org.rut.util.algorithm.SortUtil; c~;.m<yrf
]TN}`]
/** l]cQ7g5
* @author treeroot -ZJ:<
* @since 2006-2-2 m!if_Iq
* @version 1.0 !OemS7{
*/ {.W%m
public class ImprovedMergeSort implements SortUtil.Sort { IA^DfdZY
FiL JF!
private static final int THRESHOLD = 10; -2?fg
|V]E8Qt
/* EB,>k1IJ
* (non-Javadoc) JOk`emle
* =wc[r?7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7G2N&v>
*/ IC~D?c0H:
public void sort(int[] data) { $E6uA}s
int[] temp=new int[data.length]; YSmz)YfX9
mergeSort(data,temp,0,data.length-1); S?$T=[yY)
} p%'((!a2
1Btf)y'
private void mergeSort(int[] data, int[] temp, int l, int r) { #UIg<:
int i, j, k; B$j,:^
int mid = (l + r) / 2; Dr609(zg^
if (l == r) Joj8'
return; 9G9lSj5>
if ((mid - l) >= THRESHOLD) FT6cOMu
mergeSort(data, temp, l, mid); t&]IgF
else !h\3cs`QU
insertSort(data, l, mid - l + 1); ;2}Gqh)Yr
if ((r - mid) > THRESHOLD) wAYc)u#
mergeSort(data, temp, mid + 1, r); zQJbZ=5Bu"
else ^,gKA\Wli
insertSort(data, mid + 1, r - mid); %iNDRLR%I
z=sqO'~
for (i = l; i <= mid; i++) { *V}}3Degh
temp = data; R_}(p2
} 1GxYuTZ{
for (j = 1; j <= r - mid; j++) { ;.Y`T/eWS
temp[r - j + 1] = data[j + mid]; tuSgh!
} z?^p(UH
int a = temp[l]; LWE !+(n
int b = temp[r]; /k,p]/e
for (i = l, j = r, k = l; k <= r; k++) { "%Ak[04'
if (a < b) { as8<c4:v
data[k] = temp[i++]; $) $sApB
a = temp; (;h\)B!o
} else { *`W82V
data[k] = temp[j--]; &!=3Fbn
b = temp[j]; ^B/{
} zc"eSy< w$
} _)Ms9RN
} RK0IkRXQd
E^!%m8--
/** q0<g#jK
* @param data Q1rwTg\
* @param l Onl:eG;@
* @param i 03xQ%"TU<
*/ %K%z<R8
private void insertSort(int[] data, int start, int len) { n| %{R|s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T-MLW=Vu
} r|(Lb'k
} Jad'8}0J
} cg4,PI%hz
} 8PQ& 7o
1/z1~:Il
堆排序： t|//oEY
D_{J:Hb
package org.rut.util.algorithm.support; I;7VX5X
k$zDofdfp
import org.rut.util.algorithm.SortUtil; Uhf -}Jdw
@!-= :<h
/** OG.`\G|
* @author treeroot "371`!%
* @since 2006-2-2 r8qee$^M
* @version 1.0 i9\Pks#l%
*/ Z7(hW,60
public class HeapSort implements SortUtil.Sort{ #M:W?&.
c;Li~FLR
/* (non-Javadoc) ?#W>^Za=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K3jno+U&
*/ I++!F,pB
public void sort(int[] data) { :ZUy(8%Wl
MaxHeap h=new MaxHeap(); `VHm,g2
h.init(data); =zsXa=<
for(int i=0;i h.remove(); EV9m\'=j
System.arraycopy(h.queue,1,data,0,data.length); 1{A4_/R
} Ys\l[$_`*
!nu#r$K(
private static class MaxHeap{ _PuMZjGL
]xuq2MU,l
void init(int[] data){ CxO)d7c
this.queue=new int[data.length+1]; hM;EUWv
for(int i=0;i queue[++size]=data; c;j]/R$i
fixUp(size); fUa`YryQ
} cewQQ&
} :`_wy-}V
0-=QQOART\
private int size=0; |/q*Fg[f
1j}o.0\
private int[] queue; /GEqU^ B
BYu|loc
public int get() { p.zU9rID
return queue[1]; ieObo foD
} KxY|:-"Tt
,O2Uj3"
public void remove() { nwz}&nR
SortUtil.swap(queue,1,size--); \"n&|_SZ\
fixDown(1); 5t0$nKah]
} 7bTs+C_;7
file://fixdown iK)w3S}k1y
private void fixDown(int k) { F7mzBrz
int j; \&SP7~-eq
while ((j = k << 1) <= size) { }UX>O
if (j < size %26amp;%26amp; queue[j] j++; >b/Yg:t
if (queue[k]>queue[j]) file://不用交换 Hd4&"oeY
break; 3wD6,x-e
SortUtil.swap(queue,j,k); U,)+wZJ
k = j; +&JF|#FQ`
} X^"95Ic
} $+$+;1[
private void fixUp(int k) { a "8/y4Y
while (k > 1) { ~?nPp$^
int j = k >> 1; ~bgFU
if (queue[j]>queue[k]) 7kleBDDT
break; &7}-Xvc
SortUtil.swap(queue,j,k); ='>k|s:
k = j; Pf]L`haGN
} 7HFw*;
} yh} V u
k4eV*e8
} 8DyE
>a Q;8
} %$S.4#G2
GN(PH/fO9
SortUtil： .,-t}5(VSq
XVE(p3-
package org.rut.util.algorithm; $7,n8ddRy
. [*6W.X
import org.rut.util.algorithm.support.BubbleSort; i $#bg^
import org.rut.util.algorithm.support.HeapSort; s!uewS.
import org.rut.util.algorithm.support.ImprovedMergeSort; KK/~W
import org.rut.util.algorithm.support.ImprovedQuickSort; t4 $cMf
import org.rut.util.algorithm.support.InsertSort; e~jp< 4
import org.rut.util.algorithm.support.MergeSort; lfb]xu]O
import org.rut.util.algorithm.support.QuickSort; JoIffI?{(D
import org.rut.util.algorithm.support.SelectionSort; iwrS>Sm
import org.rut.util.algorithm.support.ShellSort; d8e6}C2v
;IE|XR(
/** #*XuU8q?
* @author treeroot R8?Xz5
* @since 2006-2-2 B!yAam#^
* @version 1.0 e&#qj^
*/ ?tg(X[h{S
public class SortUtil { <LH(>
public final static int INSERT = 1; x~Y]c"'D
public final static int BUBBLE = 2; 02SFFqm
public final static int SELECTION = 3; QzCu$ [
public final static int SHELL = 4; !ku5P+y$
public final static int QUICK = 5; {H=DeQ
public final static int IMPROVED_QUICK = 6; c"H*9u:
public final static int MERGE = 7; aU4v-9@U8
public final static int IMPROVED_MERGE = 8; 5W(G~m?jC6
public final static int HEAP = 9; R6ca;
XN'x`%!*3#
public static void sort(int[] data) { t,)`Zu$
sort(data, IMPROVED_QUICK); #0zMPh /U}
} c>,|[zP{
private static String[] name={ L?23Av0W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %D:Mt|
}; oEGe y8?
@Q 8E)k@
private static Sort[] impl=new Sort[]{ %lF}!
new InsertSort(), pA&CBXio
new BubbleSort(), ^0Cr-
new SelectionSort(), hWP$U
new ShellSort(), 'P3CgpF<Z2
new QuickSort(), "d^hY}Xx
new ImprovedQuickSort(), f,wB.MN
new MergeSort(), +vY8HQ|v
new ImprovedMergeSort(), /{gCf
new HeapSort() mQ*:?\@
}; xxpvVb)mF
7Y"CeU-S
public static String toString(int algorithm){ A'^y+42jY
return name[algorithm-1]; U ]Ek5p
} KP(RK4F
NifzZEX
public static void sort(int[] data, int algorithm) { [7]Kvb2t
impl[algorithm-1].sort(data); X"0n*UTF,
} wi-O}*O
p~vq1D6
public static interface Sort { @)owj^sA
public void sort(int[] data); 2ys'q!
} r+r-[z D(
n&DRh.@
public static void swap(int[] data, int i, int j) { Y]!8Ymuww@
int temp = data; bKRz=$P?
data = data[j]; } Wx#"6
data[j] = temp; +KGZk?%
} zGjf7VV2a
} A2LqBirkl