[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; S#Tu/2<}
} % pAbkb3m
int i1=l; q(v|@l|)yO
int i2=mid+1; {e0(M*u
for(int cur=l;cur<=r;cur++){ pdjRakN
if(i1==mid+1) Y&bO[(>1
data[cur]=temp[i2++]; .9UrWBW\I
else if(i2>r) E H|L1g
data[cur]=temp[i1++]; 0-/@-qV\
else if(temp[i1] data[cur]=temp[i1++]; B[t>T>~
else sH]T1z
data[cur]=temp[i2++]; LZQG.
} -C* 6>$A
} uavyms^
{`(MK6D8 c
} s|X_:3\x
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改进后的归并排序: t$?#@8Yk
R83PHM
package org.rut.util.algorithm.support; ";DozPU
K>n@8<7
import org.rut.util.algorithm.SortUtil; &kT!GU^n
$9u:Ox 2
/** ^mN`!+
* @author treeroot lwIxn1n
* @since 2006-2-2 b*4aUpW
* @version 1.0 Bm<tCN-4
*/ q_[`PYT
public class ImprovedMergeSort implements SortUtil.Sort { \S{ihS@J
uuL(BUGt-
private static final int THRESHOLD = 10; XJk~bgO*
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/* z0F55<i
* (non-Javadoc) nswhYSX
* Bj\Us$cZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -#R63f&
*/ 2-@t,T
public void sort(int[] data) { ;Zn&Nc7
int[] temp=new int[data.length]; }g:'K
mergeSort(data,temp,0,data.length-1); ?[%.4i;-h
} @q{.
MPYYTQ1FB
private void mergeSort(int[] data, int[] temp, int l, int r) { _xnJfW_
int i, j, k; >ul&x!?@
int mid = (l + r) / 2; !(3[z>
if (l == r) +>yspOEz
return; 0wAB;|~*62
if ((mid - l) >= THRESHOLD) dTte4lh
mergeSort(data, temp, l, mid); =5uhIU0O
else *xpPD\{k
insertSort(data, l, mid - l + 1); yh).1Q-D
if ((r - mid) > THRESHOLD) U!YoZ?
mergeSort(data, temp, mid + 1, r); s!1/Bm|_T
else v?n# C
insertSort(data, mid + 1, r - mid); T7l,}G
p4kK" \ln
for (i = l; i <= mid; i++) { IoV"t,
temp = data; zvfdfQ-i
} 2#cw_Ua
for (j = 1; j <= r - mid; j++) { B~,?Gbl+g
temp[r - j + 1] = data[j + mid]; /;xrd\du
} +?{LLD*2e
int a = temp[l]; /AYq^
int b = temp[r]; i~*6JB|
for (i = l, j = r, k = l; k <= r; k++) { ,mz7!c9H^a
if (a < b) { "hZ `^"0b
data[k] = temp[i++]; 9NZq k
a = temp; b{X.lz0
} else { rA@|nL{
data[k] = temp[j--]; jR*iA3LDo
b = temp[j]; }r"E\~E
} Ok}e|b[D
} P]L%$!g
} $#wi2Ve=6b
O"_QDl<ya
/** Lmw)Ts>
* @param data A{\DzUV9,
* @param l [g{fz3 O6
* @param i >)mF'w
*/ {}=5uU2Tu
private void insertSort(int[] data, int start, int len) { ^9YS dFH/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^PMA"!n8
} 8v)HTD/C
} 0BAZWm
} _T=";NSa
} `wSoa#U"@
^}:0\;|N
堆排序： r]kks_!Z
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package org.rut.util.algorithm.support; S'>KGdF
E;"VI2F
import org.rut.util.algorithm.SortUtil; TT){15T;"
qR , 5
/** 1k"i"kRM
* @author treeroot WMFn#.aY5
* @since 2006-2-2 W!TTfj
* @version 1.0 `}8)P#
*/ '%YTMN@
public class HeapSort implements SortUtil.Sort{ 0t*PQ%
,V&E"D{u
/* (non-Javadoc) x/0x&la
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z_8Bl2tl
*/ =CL,+
public void sort(int[] data) { "kucFf f
MaxHeap h=new MaxHeap(); 'z+Pa^)v
h.init(data); v~p?YYOm<
for(int i=0;i h.remove(); !u`f?=s;
System.arraycopy(h.queue,1,data,0,data.length); ,3)JZM
} r 2{7h>
@#9xSs#
private static class MaxHeap{ m5hu;>gt
kjSzuqB
void init(int[] data){ [u-=<hnoa
this.queue=new int[data.length+1]; Q1H.2JXr
for(int i=0;i queue[++size]=data; % 5BSXAc
fixUp(size); C3 m_sv#e
} Gr3 q
} DG3Mcf@5
ADMeOdgca
private int size=0; Q0Gfwl
~\%H0.P6
private int[] queue; IY?o \vC
bf\ Uq<&IJ
public int get() { !'>#!S~h3
return queue[1]; ~fO#En
} d 5hx%M
~{6}SXp4U
public void remove() { )F0Q2P1I
SortUtil.swap(queue,1,size--); B\`${O(
fixDown(1); cL"Ral-qB
} 5+)_d%v=6!
file://fixdown LI"N^K'z
private void fixDown(int k) { QKoJxjR=^
int j; CKDg3p';
while ((j = k << 1) <= size) { y!j>_m){w
if (j < size %26amp;%26amp; queue[j] j++; 9Lqz:4}
if (queue[k]>queue[j]) file://不用交换 ,yi@?lc
break; Pfm B{
SortUtil.swap(queue,j,k); lI5>d(6p
k = j; #4Cf-$J
} lB|.TCbW
} :[Ie0[H/M
private void fixUp(int k) { #;"lBqxY`
while (k > 1) { zEeix,IU
int j = k >> 1; (k%r_O6
if (queue[j]>queue[k]) zK*i:(>B
break; 8#Y_]Z?)
SortUtil.swap(queue,j,k); d~b@F&mf
k = j; GVdJ&d\x
} ww\2
} c>C!vAg
1DF8-|+
} \<b42\a}
dBW4%Zh
} 4_4|2L3
g#5t8w
SortUtil： I;mc:@R<
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package org.rut.util.algorithm; RLDu5
B^x}=Z4
import org.rut.util.algorithm.support.BubbleSort; Fk?KR
import org.rut.util.algorithm.support.HeapSort; HA0yX?f]
import org.rut.util.algorithm.support.ImprovedMergeSort; h:vI:V[/X
import org.rut.util.algorithm.support.ImprovedQuickSort; y!\q', F
import org.rut.util.algorithm.support.InsertSort; qmnW
import org.rut.util.algorithm.support.MergeSort; ,w_C~XN$t
import org.rut.util.algorithm.support.QuickSort; g;y*F;0@
import org.rut.util.algorithm.support.SelectionSort; 5WtI.7r
import org.rut.util.algorithm.support.ShellSort; iM]&ryGB#
1w>G8
/** o6r ^
* @author treeroot r;fcBepO
* @since 2006-2-2 k6_OP]
* @version 1.0 ITjg]taD
*/ "%=K_WJ?
public class SortUtil { a#3,qp!
public final static int INSERT = 1; COSQ
public final static int BUBBLE = 2; )KYU[
public final static int SELECTION = 3; &Fch{%S>
public final static int SHELL = 4; 1,6Y)_
public final static int QUICK = 5; ?/KkN3Y_j[
public final static int IMPROVED_QUICK = 6; H"|oI|~
public final static int MERGE = 7; "6iq_!#L
public final static int IMPROVED_MERGE = 8; A@w9_qo
public final static int HEAP = 9; v<?k$ e5
PO=A^b
public static void sort(int[] data) { 8noo^QO
sort(data, IMPROVED_QUICK); xllmF)]*Y
} 75']fFO@!
private static String[] name={ ;B"S*wYMN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &F +hh{
}; RD*.n1N1
%#7^b=;=
private static Sort[] impl=new Sort[]{ ATI2
new InsertSort(), "3NE%1T
new BubbleSort(), $H7T|`WI.,
new SelectionSort(), a3BlydSlf
new ShellSort(), 0ac'<;9]zP
new QuickSort(), "=9)|{=m
new ImprovedQuickSort(), @z(s\T
new MergeSort(), vslN([@JR
new ImprovedMergeSort(), iIg99c7/&9
new HeapSort() XN'<H(G
}; Fi#b0S
U9q6m3#$
public static String toString(int algorithm){ Za1VJ5-
return name[algorithm-1]; -O[9{`i]
} W; ?'
kL%o9=R1
public static void sort(int[] data, int algorithm) { w Yr M2X@
impl[algorithm-1].sort(data); |B@\Nf7
} +/8KN
Yo2n[
public static interface Sort { ~g;lVj,N'
public void sort(int[] data); 0S>U_#-
} XO4rrAYvW
u[coWaPsZ
public static void swap(int[] data, int i, int j) { ldWr-
int temp = data; .^uYr^(|[
data = data[j]; xA"7a
data[j] = temp; ^g n7DiIPH
} K]Q1VfeL=
} eHI7= [h