[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; .Wi%V"
} I~E&::,
int i1=l; IGo5b-ds
int i2=mid+1; :o87<) _F
for(int cur=l;cur<=r;cur++){ il"pKQF
if(i1==mid+1) J9f]=1`
data[cur]=temp[i2++]; @HE?G
else if(i2>r) a<]vHC7
data[cur]=temp[i1++]; ' QjJ^3A
else if(temp[i1] data[cur]=temp[i1++]; sk_xQo#Y 3
else D(Q]ddUi'
data[cur]=temp[i2++]; |eFaOL|
} * bhb=~
} (]VY==t~
!aJ6Uf%R
} uJ fXe
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改进后的归并排序: RE-y5.kE^
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package org.rut.util.algorithm.support; ><.*5q
d/@P;YN!
import org.rut.util.algorithm.SortUtil; ah(k!0PV
6\v4#
/** 16nU`TN
* @author treeroot /%F,
* @since 2006-2-2 k9NHdi7&2
* @version 1.0 ytb1hFs
*/ @Jb-[W$*
public class ImprovedMergeSort implements SortUtil.Sort { ixoN#'y<"
@3U=kO(^+\
private static final int THRESHOLD = 10; r^ '
'$z@40u
/* 83aWMmA(1
* (non-Javadoc) 0Pt%(^
* /)dyAX(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "`4M4`'
*/ ,% .)mf
public void sort(int[] data) { v`Ja Bn
int[] temp=new int[data.length]; ^X"x,8}&V
mergeSort(data,temp,0,data.length-1); Cy)QS{YX
} !kH 1|
#BgiDLh
private void mergeSort(int[] data, int[] temp, int l, int r) { .ezZ+@LI+#
int i, j, k; LWN9 D
int mid = (l + r) / 2; M~y}0Ik
if (l == r) v0bP|h[t
return; ;RQ}OCz9}8
if ((mid - l) >= THRESHOLD) sheCwhV
mergeSort(data, temp, l, mid); }D3hP|.X
else ; 3sjTqD
insertSort(data, l, mid - l + 1); FF|M7/[~
if ((r - mid) > THRESHOLD) [o7Qr?RN
mergeSort(data, temp, mid + 1, r); =+[`9
else r]aI=w<(f
insertSort(data, mid + 1, r - mid); WD*z..`
6uk}4bdvq
for (i = l; i <= mid; i++) { *<h)q)HS
temp = data; 8.7lc2aX
} k@gQY_
for (j = 1; j <= r - mid; j++) { EN8xn9M?
temp[r - j + 1] = data[j + mid]; ?V(+Cc
} 6.[3N~pq
int a = temp[l]; QNxxW2+
int b = temp[r]; 9ESV[
for (i = l, j = r, k = l; k <= r; k++) { yb0Mn*X+ N
if (a < b) { H7meI9L
data[k] = temp[i++]; I%B\Wy/j^
a = temp; (rq(y$N
} else { ,#%I$
data[k] = temp[j--]; 8kE3\#);\
b = temp[j]; l?Ibq}[~
} p9S>H
} [| N73m,&
} !\^W*nQ>l
dx$+,R~y
/** lB8gD
* @param data i|28:FJA
* @param l 9kbczL^Y
* @param i 6fCHd10!
*/ M 5`hMfg
private void insertSort(int[] data, int start, int len) { +jKu^f6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o*oFCR]j
} .kgt?r
} )HX(-"c
} Y.#fpG'
} 10bv%ZX7
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堆排序： nUisC5HW
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package org.rut.util.algorithm.support; ;krIuk-
h R6Pj"@0
import org.rut.util.algorithm.SortUtil; Ry?f; s
~mv5{C
/** N:Ir63X*#
* @author treeroot P.mlk>r
* @since 2006-2-2 \m:('^\6o
* @version 1.0 . lNf.x#u
*/ EG3u)}vI
public class HeapSort implements SortUtil.Sort{ Ynp#3r
_1~pG)y$U
/* (non-Javadoc) Vjd>j; H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tk`|{Ph0
*/ Gi*_ &
public void sort(int[] data) { Hxleh><c-
MaxHeap h=new MaxHeap(); ?I\,RiZkz^
h.init(data); %36@1l-N
for(int i=0;i h.remove(); e0<O6
System.arraycopy(h.queue,1,data,0,data.length); nyBT4e
} Zq5~M bldh
9\0$YY%
private static class MaxHeap{ T8yMaC
oY7jj=z#T
void init(int[] data){ tk>J mcTw
this.queue=new int[data.length+1]; M|{NC`fa
for(int i=0;i queue[++size]=data; 0s RcA-9
fixUp(size); jdx T662q
} ~=|QPO(d
} J93xxj
z<.?8bd
private int size=0; )lq+Gv[%F
q1m{G1W n
private int[] queue; \)ZCB7|
MIb[}w=
public int get() { *dPbV.HCl
return queue[1]; }]JHY P\
} ~@#a*="
_rmKvSD%
public void remove() { .N`*jT
SortUtil.swap(queue,1,size--); 'S:$4j
fixDown(1); e*U6^Xex
} f[ia0w5 m
file://fixdown 7+qKA1t^
private void fixDown(int k) { +(^HL3
int j; l[rK)PM
while ((j = k << 1) <= size) { T''<yS
if (j < size %26amp;%26amp; queue[j] j++; ;~'&m
if (queue[k]>queue[j]) file://不用交换 !e*T. 1Kz
break; ]'-y-kqY
SortUtil.swap(queue,j,k); /'b7q y
k = j; 0N$FIw2
} h_SkX@"/-
} l@ (:Q!Sk
private void fixUp(int k) { TPak,h(1
while (k > 1) { d`=LZio
int j = k >> 1; / :6|)AW.{
if (queue[j]>queue[k]) 0m"Ni:KEf
break; Rd|8=`)
SortUtil.swap(queue,j,k); "F6gV;{Bt
k = j; q6<P\CSHy<
} `uH7~ r^
} tw&v@HUP
y*6/VSRkt4
} "?<h,Hvi
c*(^:#"9
} 't5`Ni
m^=El7+
SortUtil： ?_cOU@n
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package org.rut.util.algorithm; )^+hm+27v
e<[ ] W4"A
import org.rut.util.algorithm.support.BubbleSort; s~9n13z
import org.rut.util.algorithm.support.HeapSort; Vu=/<;-N
import org.rut.util.algorithm.support.ImprovedMergeSort; UGj |)/
import org.rut.util.algorithm.support.ImprovedQuickSort; /,UnT(/k(
import org.rut.util.algorithm.support.InsertSort; P.QF9%
import org.rut.util.algorithm.support.MergeSort; c&FOt
import org.rut.util.algorithm.support.QuickSort; !a-B=pn!]
import org.rut.util.algorithm.support.SelectionSort; 0!7p5
import org.rut.util.algorithm.support.ShellSort; KROD(
xwi6#>
/** ,wXmJ)/WZ
* @author treeroot )*S:C
* @since 2006-2-2 Kf*Dy:e
* @version 1.0 ^$sqU
*/ 9 <{C9
public class SortUtil { 'W yWO^Bdk
public final static int INSERT = 1; akU2ToP
public final static int BUBBLE = 2; 4^M"V5tDx
public final static int SELECTION = 3; :O$bsw:3w<
public final static int SHELL = 4; >#k- ~|w
public final static int QUICK = 5; ^YropzHZ4E
public final static int IMPROVED_QUICK = 6; }m~MN4 l
public final static int MERGE = 7; D79:L:
public final static int IMPROVED_MERGE = 8; \C h01LR"
public final static int HEAP = 9; _B&Lyg!J
A`ajsZ{q,
public static void sort(int[] data) { F= %A9b_a
sort(data, IMPROVED_QUICK); x3Y)l1gh
} dRnf
private static String[] name={ XWyP'\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c38XM]Jeq
}; 4=MjyH|[Jx
CgrQ"N5
private static Sort[] impl=new Sort[]{ |K06H ?6X
new InsertSort(), j7k}!j_O{
new BubbleSort(), +a1iZ bh
new SelectionSort(), +E_yEH7_)
new ShellSort(), Xq&BL,lS
new QuickSort(), 46Sz#^y P
new ImprovedQuickSort(), Y`Io}h G$
new MergeSort(), 6/Xs}[iJ
new ImprovedMergeSort(), ,3y9yJQa*#
new HeapSort() Z>Mv$F"p:
}; cgSN:$p(R
|=m.eU
public static String toString(int algorithm){ nGkSS_X
return name[algorithm-1]; $ VP1(C
} hW<v5!,
@qq"X'3t
public static void sort(int[] data, int algorithm) { G9 O6Fi
impl[algorithm-1].sort(data); ;ryNfP%
} W%-XN
4]ni-u0*
public static interface Sort { ]b!n ;{5
public void sort(int[] data); .t5.(0Xk[A
} 4^F%bXJ)
pUb1#=
public static void swap(int[] data, int i, int j) { IrqM_OjC
int temp = data; L2ydyXIsd
data = data[j]; !}#> ky!t
data[j] = temp; dD=$$( je
} 7RL J
} -HG.GA