[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; W|5_$p
} cg{AMeW
int i1=l; o{WyQ&2N
int i2=mid+1; !L24+$
for(int cur=l;cur<=r;cur++){ YY5!_k
if(i1==mid+1) *>[3I}mM
data[cur]=temp[i2++]; (k?7:h
else if(i2>r) L.'}e{ldW
data[cur]=temp[i1++]; 6iA( o*'Yn
else if(temp[i1] data[cur]=temp[i1++]; |j~lkzPnV
else 1;F`c`0<
data[cur]=temp[i2++]; I]`-|Q E
} r 2:2,5_
} aSutM
s^8u&y)3
} f!_ ctp
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改进后的归并排序: Vu8,(A7D%O
"sUyHt-&
package org.rut.util.algorithm.support; w3T]H_V
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import org.rut.util.algorithm.SortUtil; E%N2k|%8d_
pv)`%<
/** Nf41ZT~
* @author treeroot GX{XdJD
* @since 2006-2-2 {R6HG{"IS6
* @version 1.0 KKe8 ly,
*/ qQ]]~F
public class ImprovedMergeSort implements SortUtil.Sort { 0E`1HP"b
}28=
private static final int THRESHOLD = 10; #KlCZ~s
-V.d?A4"
/* r=.A'"Kf
* (non-Javadoc) 8 .>/6M
* ]b?9zeT*'l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !U%T&?E l
*/ 5&Ts7& .
public void sort(int[] data) { &EGqgNl
int[] temp=new int[data.length]; $tqJ/:I
mergeSort(data,temp,0,data.length-1); 1 T<+d5[C
} "UFs~S|e
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private void mergeSort(int[] data, int[] temp, int l, int r) { .wA+S8}S
int i, j, k; )j l8!O7
int mid = (l + r) / 2; SymwAS+
if (l == r) . 5y"38e
return; K kW;-{c
if ((mid - l) >= THRESHOLD) 2NGeC0=
mergeSort(data, temp, l, mid); <yA}i"-1W
else )m3Uar
insertSort(data, l, mid - l + 1); e!-,PU9+
if ((r - mid) > THRESHOLD) 2|iV,uJ&
mergeSort(data, temp, mid + 1, r); Rgy-OA
else /&#XhrT
insertSort(data, mid + 1, r - mid); $q?$]k|M`
^g1f X1
for (i = l; i <= mid; i++) { [&[^G25
temp = data; 1F8 W9b^D
} -Y#sI3o*R8
for (j = 1; j <= r - mid; j++) { bu7'oB~:V^
temp[r - j + 1] = data[j + mid]; ]Y>h3T~
} 5wao1sd#
int a = temp[l]; F7L&=K$2y
int b = temp[r]; RgdysyB
for (i = l, j = r, k = l; k <= r; k++) { _mvxsG
if (a < b) { WW2Ob*
data[k] = temp[i++]; G0 J4O!3
a = temp; j:T/iH!YF
} else { ,d+fDmm3
data[k] = temp[j--]; ,Y?sfp
b = temp[j]; , ^F)L|
} LTV{{Z+
} ZoB*0H-
} @$"J|s3M
mffn//QS
/** NgCuFL(Ic
* @param data u?Tpi[ #
* @param l 5AS[\CB4
* @param i Qp"y?S
*/ jr7C}B-Fb^
private void insertSort(int[] data, int start, int len) { "vYE+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UtB6V)YI
} l\AMl \
} jN-vY<?h]
} etT +
} +;g{$da5
QVF]Ci_=
堆排序： _zt19%Wg
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package org.rut.util.algorithm.support; {8,<ZZ_
jV#ahNq;
import org.rut.util.algorithm.SortUtil; zf4Ec-)
(Rk_-9_E.
/** \\BCcr\l
* @author treeroot #j#_cImE
* @since 2006-2-2 +X`V|E,no
* @version 1.0 wiaX&-c]8
*/ !3iGz_y
public class HeapSort implements SortUtil.Sort{ 6C>_a*w
O%1v)AT&\
/* (non-Javadoc) >e2<!#er|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xvzr:pP
*/ %8*64T")
public void sort(int[] data) { kyAXRwzI
MaxHeap h=new MaxHeap(); 87}&`
h.init(data); VL[R(a6c <
for(int i=0;i h.remove(); 8ul&x~2;X
System.arraycopy(h.queue,1,data,0,data.length); *5zrZ]^
} Tu{h<Zy
2j(h+?N7k
private static class MaxHeap{ ZYf2XI(_"
-",=G\XZ
void init(int[] data){ 2,lqsd:xM
this.queue=new int[data.length+1]; &U+ _ -Ph
for(int i=0;i queue[++size]=data; 7r|(}S
fixUp(size); T081G`li
} yCJFo
} Oz|K8p
8 #ndFpu
private int size=0; %{3 aW>yx
5TBp'7 /s~
private int[] queue; )s1Ib4C
}M1sksk5
public int get() { ?ER-25S
return queue[1]; =%zLh<3v
} yq+!czlZ
Z%GTnG|rG
public void remove() { MNH1D!}
SortUtil.swap(queue,1,size--); jjJ2>3avY
fixDown(1); j)t+jcMUI
} Mv c`)_Md
file://fixdown ;['[?wk
private void fixDown(int k) { P}.7Mehf
int j; m/NdJMoN=
while ((j = k << 1) <= size) { 0 ugT2%
if (j < size %26amp;%26amp; queue[j] j++; <p;k)S2J
if (queue[k]>queue[j]) file://不用交换 DmXcPJ[9
break; K[chjp!$l
SortUtil.swap(queue,j,k); yL;M"L
k = j; M MzGd:0b
} lnE+Au'
} Jc)^49Rf
private void fixUp(int k) { tNVV)C
while (k > 1) { L6>pGx
int j = k >> 1; 1 nvTce
if (queue[j]>queue[k]) (Qgde6
break; kt4d;4n
SortUtil.swap(queue,j,k); j@Qg0F
k = j; EBtLzbj
} Kb =@ =Xta
} v#=`%]mL
K^r)CCO
} x\2?ym@
n;R#,!<P
} Oi"a:bCU
W4;m H}#0
SortUtil： !L5jj#0
k`".
package org.rut.util.algorithm; 8Ry74|`=R
M5T9JWbN
import org.rut.util.algorithm.support.BubbleSort; OL7_'2_z.
import org.rut.util.algorithm.support.HeapSort; ,:+dg(\r
import org.rut.util.algorithm.support.ImprovedMergeSort; ]4+s$rG
import org.rut.util.algorithm.support.ImprovedQuickSort; |}){}or
import org.rut.util.algorithm.support.InsertSort; s<x1>Q7X~
import org.rut.util.algorithm.support.MergeSort; U $Qv>7
import org.rut.util.algorithm.support.QuickSort; IPuA#C
import org.rut.util.algorithm.support.SelectionSort; w@2Vts
import org.rut.util.algorithm.support.ShellSort; "i:T+#i({O
P#v*TD'
/** {;2i.m1
* @author treeroot \b}~2oX
* @since 2006-2-2 #6Xs.*b5C
* @version 1.0 >-E<n8
*/ R`F,aIJ]
public class SortUtil { TIy&&_p
public final static int INSERT = 1; 1Xy]D
public final static int BUBBLE = 2; L.6WiVP)
public final static int SELECTION = 3; 5>9Y|UU
public final static int SHELL = 4; PR<||"03
public final static int QUICK = 5; ;0ME+]`"3
public final static int IMPROVED_QUICK = 6; IB.yU,v
public final static int MERGE = 7; v;{{ y-
public final static int IMPROVED_MERGE = 8; y( r1I[W'
public final static int HEAP = 9; 3+MB5T
}4co)B"
public static void sort(int[] data) { 6]Q3Yz^h
sort(data, IMPROVED_QUICK); !BU)K'mj
} 0ZAj=u@O
private static String[] name={ 33:DH}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7#;vG>]
}; '#\D]5
ba@ax3
private static Sort[] impl=new Sort[]{ ps1YQ3Ep&
new InsertSort(), 7J>Gd
new BubbleSort(), x@P{l&:>
new SelectionSort(), T+"f]v
new ShellSort(), 8YY|;\F)J~
new QuickSort(), Hv#q:R8
new ImprovedQuickSort(), Q/_[--0&#
new MergeSort(), V6iL5&
new ImprovedMergeSort(), Z+s%;f;
new HeapSort() =4C}{IL
}; )J/HkOj"V
mXjgs8s
public static String toString(int algorithm){ ic6L9>[
return name[algorithm-1]; jigs6#
} OKuD"
B_3QQtjAl
public static void sort(int[] data, int algorithm) { QHf$f@bjI
impl[algorithm-1].sort(data); "i'bTVs
} $]d*0^J 6
vfvlB[
public static interface Sort { U/MFhD(06
public void sort(int[] data); Dxx;v.$
} 90 {tIX
t\U$8l_;
public static void swap(int[] data, int i, int j) { wV<7pi
int temp = data; ,-*iCs<
data = data[j]; 2@@l{Y0f6
data[j] = temp; fhpX/WE6
} [p;*r)f2}
} tR`S#rk