[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; 7HQL^Q
} 5!pNo*QK
int i1=l; bSn={O"M
int i2=mid+1; rCsC}2O
for(int cur=l;cur<=r;cur++){ }@/Ox
if(i1==mid+1) yMzy!b Ky
data[cur]=temp[i2++]; Qmb+%z
else if(i2>r) epG]$T![
data[cur]=temp[i1++]; 1]Cbi7
else if(temp[i1] data[cur]=temp[i1++]; xFJT&=Af W
else wWSw0 H/
data[cur]=temp[i2++]; a8v\H8@X
} >rSCf=
} kM@e_YtpY
bxO[y<|XL
} :'xZF2
{<a)+S.6U
改进后的归并排序: gPA8A>U)[
\gK'g-)}
package org.rut.util.algorithm.support; xwW(WHdC]
!I\eIV>0b
import org.rut.util.algorithm.SortUtil; P: L6Zo-J
,7Ejb++/M,
/** 9UV}`UM3V
* @author treeroot _/"e'@z
* @since 2006-2-2 F>^KXq:Z
* @version 1.0 X\w["!B
*/ cvf?ID84
public class ImprovedMergeSort implements SortUtil.Sort { j?T>S]xOX
OoRg:"9{#
private static final int THRESHOLD = 10; q&O9W?E8dG
!)CY\c4}d>
/* 7h2/8YUgQ
* (non-Javadoc) m:Rm(ga9
* ^UhqV"[7k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $FDGHFM
*/ |`kkmq
public void sort(int[] data) { ;8f)p9vE
int[] temp=new int[data.length]; uhnnjI
mergeSort(data,temp,0,data.length-1); ]JvjM,
} H|,d`@U
dd;rnev+
private void mergeSort(int[] data, int[] temp, int l, int r) { t;0]d7ey'
int i, j, k; N})vrB;1
int mid = (l + r) / 2; 0v6Z4Ahpo
if (l == r) $ %|b6Gr/&
return; ;CoD5F!
if ((mid - l) >= THRESHOLD) T00sYoK
mergeSort(data, temp, l, mid); ~IPATG
else U%Hcck'
insertSort(data, l, mid - l + 1); ;Jb%2?+=!
if ((r - mid) > THRESHOLD) PMX'vA`
mergeSort(data, temp, mid + 1, r); m(dW["8D
else fZS'e{V
insertSort(data, mid + 1, r - mid); R?,v:S&i7;
ew~uOG+
for (i = l; i <= mid; i++) { 7/fJQM
temp = data; T,Q7 YI
} "vkM*HP
for (j = 1; j <= r - mid; j++) { uZ@qlq8
temp[r - j + 1] = data[j + mid]; !>wu7u-
} a+CJJ3T-
int a = temp[l]; ??|,wIRz
int b = temp[r]; A[`c+&
for (i = l, j = r, k = l; k <= r; k++) { WP Gp(Xw
if (a < b) { n{qVF#N_
data[k] = temp[i++]; (lq%4h
a = temp; j~=<O<P
} else { sFvYCRw /
data[k] = temp[j--]; 0"N4WH O
b = temp[j]; __uk/2q
} ar'VoL}
} m;IKV,
} {j<?+o5A
SMU8U
/** > PL}7f&:
* @param data M1k_ldP
* @param l xF YHv@g
* @param i Xk:3w,
*/ q$s)(D
private void insertSort(int[] data, int start, int len) { \f VX<L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); - K"L6m|
} .b!HEi<F
} ti]8_vP}*
} .:B0(4Mj
} a3z_o)"
BLt_(S?Z`
堆排序： (JE&1 @
/}%C'
package org.rut.util.algorithm.support; q[Ey!h)xq
zWhzU|=8
import org.rut.util.algorithm.SortUtil; aW;)-0+
t-iQaobF
/** }dqOE-"I"n
* @author treeroot .vIRz-S
* @since 2006-2-2 &$#NV@
* @version 1.0 vfVF^ WOd
*/ )7AjRtb!/
public class HeapSort implements SortUtil.Sort{ _W,?_"[R=
rJtk4hOF
/* (non-Javadoc) P.=Dd"La
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F4~O-g.<
*/ h CV(O2jL
public void sort(int[] data) { JE@3UXg
MaxHeap h=new MaxHeap(); zP@\rZ@4
h.init(data); onS4ZE3B
for(int i=0;i h.remove(); *13-)yfd
System.arraycopy(h.queue,1,data,0,data.length); ~H[_=
} 9I#a{%A:
%+#l{\z
private static class MaxHeap{ <~svy)Cz
Xg;<?g?k
void init(int[] data){ y.gNjc
this.queue=new int[data.length+1]; ;7JyL|2
for(int i=0;i queue[++size]=data; 41rS0QAM
fixUp(size); &`-e; Xt
} yV6U<AP$3
} <K/iX%b?
>Il{{{\>
private int size=0; :g-vy9vb
Y8fel2;
private int[] queue; !NKPy+v
[s%uE+``S
public int get() { g(S4i%\
return queue[1]; l~@ -oE
} >{rD3X"d
r-[YJzf@P
public void remove() { 9):^[Wkx
SortUtil.swap(queue,1,size--); }Py Z{yS
fixDown(1); [Z1,~(3
} fq):'E)
file://fixdown bQu@.'O!k
private void fixDown(int k) { bZ+Hu~
int j; =}e{U&CX
while ((j = k << 1) <= size) { ws,VO*4
if (j < size %26amp;%26amp; queue[j] j++; ? fM_Y
if (queue[k]>queue[j]) file://不用交换 .g=D70
break; =;?Maexp3$
SortUtil.swap(queue,j,k); x51xY$M
k = j; H4M`^r@)'
} 4]%MrSjS
} `{}DLaD9
private void fixUp(int k) { "M %WV>
while (k > 1) { !;Ctz'wz
int j = k >> 1; @ "CP@^
if (queue[j]>queue[k]) COH>B1W@
break; {Z~ze`N/
SortUtil.swap(queue,j,k); CzmB76zy.
k = j; K#yCZ2
} XNl!?*l5?l
} >[P`$XkXd4
o4aFgal1
} _o>?\:A
;4`%?6%
} sB'~=1m^
d! _8+~
SortUtil： Cg^1(dBd[9
dQNW1-s
package org.rut.util.algorithm; 1%N[DA^<\
jF{\=&fU
import org.rut.util.algorithm.support.BubbleSort; QGXR<Y
import org.rut.util.algorithm.support.HeapSort; -}H EV#ev
import org.rut.util.algorithm.support.ImprovedMergeSort; "?"+1S
import org.rut.util.algorithm.support.ImprovedQuickSort; iR'Pc3
import org.rut.util.algorithm.support.InsertSort; j[fY.>yt&
import org.rut.util.algorithm.support.MergeSort; dp'k$el
import org.rut.util.algorithm.support.QuickSort; xK_0@6
import org.rut.util.algorithm.support.SelectionSort; .V l
import org.rut.util.algorithm.support.ShellSort; TF@k{_f
_Oc\hW
/** su~J:~q
* @author treeroot nYnv.5
* @since 2006-2-2 mnq1WU;<
* @version 1.0 __-V_(/b,x
*/ !L@a;L
public class SortUtil { *1U"uJno
public final static int INSERT = 1; qtS+01o
public final static int BUBBLE = 2; HQ/ Q"
public final static int SELECTION = 3; G"*ch$:
public final static int SHELL = 4; YH0utc
public final static int QUICK = 5; Ve[&_(fP
public final static int IMPROVED_QUICK = 6; -8Uz8//A
public final static int MERGE = 7; }FC(Z-g
public final static int IMPROVED_MERGE = 8; 'L veCi_
public final static int HEAP = 9; f;,^ ]mw
hx;0h&L
public static void sort(int[] data) { L#u!T)!zW
sort(data, IMPROVED_QUICK); m Wh
} aByd,uSe)_
private static String[] name={ 9Pdol!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;0O>$|kg
}; nSbcq>3
" VSma
private static Sort[] impl=new Sort[]{ JP6+h>ft
new InsertSort(), e/<'HM T
new BubbleSort(), KhNOxMZ
new SelectionSort(), JcW<<7R
new ShellSort(), cdD?QnZ
new QuickSort(), 2zbV9Bhq
new ImprovedQuickSort(), 2U'Vq
new MergeSort(), E~c>LF_]Q
new ImprovedMergeSort(), dm{/
new HeapSort() RjGJfN{
}; HP[M"u
}(w9[(K
public static String toString(int algorithm){ 7[YulC-pH
return name[algorithm-1]; GFYHt!&[\
} UiN6-{v<2
91}kBj
public static void sort(int[] data, int algorithm) { h@D!/PS
impl[algorithm-1].sort(data); PKX Tj6hj)
} ?w>-ya
/jd.<r=_I
public static interface Sort { 4cJka~
public void sort(int[] data); 'a=QCO 0
} (L!#2Jy
*#sY-Gd
public static void swap(int[] data, int i, int j) { )'axJ
int temp = data; ~x g#6%<=
data = data[j]; f9?f!k
data[j] = temp; =(p]L
} dC8,
} )L$)qfQ~x