[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; 2z+-vT%
} |on$)vm
int i1=l; 9&VfbrBM
int i2=mid+1; Du7DMo=l
for(int cur=l;cur<=r;cur++){ o+F]80CH
if(i1==mid+1) )Co&(;zf
data[cur]=temp[i2++]; f0Zn31c^
else if(i2>r) \-eDNwJ:#@
data[cur]=temp[i1++]; ?x-:JME0
else if(temp[i1] data[cur]=temp[i1++]; {DVu* %|
else PD$@.pib
data[cur]=temp[i2++]; '3'*VcL(
} _1EWmHZ?
} !{c"C
Z7:TPY$b
} Sn~h[s_(
sY*iRq
改进后的归并排序: ]Ac&h aAP
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package org.rut.util.algorithm.support; \Ng|bWR>LQ
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import org.rut.util.algorithm.SortUtil; %`b %TH^
XI8rU)q
/** tLc9-
* @author treeroot rV6SN.
* @since 2006-2-2 n)6mfoe
* @version 1.0 W^sH|2g
*/ ZlEH3-Zv
public class ImprovedMergeSort implements SortUtil.Sort { KDUa0$"
4qe!+!#$
private static final int THRESHOLD = 10; \&Bvh4Q
stcbM
/* d|Q_Z@;JF
* (non-Javadoc) 530Z>q
* H}}g\|r&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %"{jNC?
*/ [t.x cO
public void sort(int[] data) { ?Gr2@,jlD
int[] temp=new int[data.length]; 6Q}WX[| tQ
mergeSort(data,temp,0,data.length-1); Dqh rg;
} =U)e_q
F `cuV
private void mergeSort(int[] data, int[] temp, int l, int r) { rM5{R}+;
int i, j, k; /_g-w93
int mid = (l + r) / 2; pipO,n
if (l == r) C_q@ixF{
return; B4d\4S_r%
if ((mid - l) >= THRESHOLD) NL7CeHs5
mergeSort(data, temp, l, mid); _Vl22'wl
else t;2\(_A
insertSort(data, l, mid - l + 1); s+RSAyU
if ((r - mid) > THRESHOLD) M+ljg&fy
mergeSort(data, temp, mid + 1, r); f 3t&Bcw$
else c u:1|gt
insertSort(data, mid + 1, r - mid); xfsf
kH9P(`;Vq
for (i = l; i <= mid; i++) { .*_uXQ
temp = data; B!X;T9^d
} F\U^-/0,
for (j = 1; j <= r - mid; j++) { ,ag:w<km
temp[r - j + 1] = data[j + mid]; $V?h68[c
} 6Rcl HU
int a = temp[l]; BGO!c[-
int b = temp[r]; C!%\cy%Xj
for (i = l, j = r, k = l; k <= r; k++) { 20Rj Rd
if (a < b) { r'5~4'o$
data[k] = temp[i++]; ,y%4QvG7a
a = temp; :K]&rGi,
} else { <{xU.zp'
data[k] = temp[j--]; zFpM\{`[g
b = temp[j]; G:k]tZ*`
} ugT;NB
} $ &III
} d} {d5-_a
2$OI(7b=
/** sH_5.+,`
* @param data h|Z%b_a
* @param l %D9,Femt
* @param i o:x,zfW
*/ Z'F=Xw6;b
private void insertSort(int[] data, int start, int len) { $22_>OsA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -o`Eka!ELz
} c@&-c[k^W
} rz'A#-?'oG
} IA$)E
} %40uw3
l%^VBv> 2
堆排序： 0[SJ7k19
S.Rqu+
package org.rut.util.algorithm.support; S(nZ]QEG
g4"0:^/
import org.rut.util.algorithm.SortUtil; |)'6U3
=}h8Cl{H/
/** Q3OGU}F
* @author treeroot w,/&oe5M+
* @since 2006-2-2 E` O@UW@
* @version 1.0 ,-[e{=Cz
*/ dH8^\s .F
public class HeapSort implements SortUtil.Sort{ '1u!@=.\G
ZA>p~Zt
/* (non-Javadoc) Yc]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .>A`FqV$~+
*/ RqnT*
public void sort(int[] data) { p#fd+
MaxHeap h=new MaxHeap(); Kx[u9MD
h.init(data); 93+p~?
for(int i=0;i h.remove(); gs?=yNL
System.arraycopy(h.queue,1,data,0,data.length); G5K_e:i
} _pM~v>~*+
3\~ RWoB0u
private static class MaxHeap{ >^\}"dEvr
BEfp3|Stb
void init(int[] data){ .NOh[68'
this.queue=new int[data.length+1]; kl&9M!;:n
for(int i=0;i queue[++size]=data; <ic%c/mN
fixUp(size); {y0`p1
} s1/:Ts[3i
} t^Hte^#S
V/; / &
private int size=0; SA1|7
pl.D h
private int[] queue; cI g|sn
}%m:^*@$9
public int get() { gOnVN6
return queue[1]; @jvF[wi;
} !~Am1\02
qwz_.=5E6
public void remove() { K;fRDE){
SortUtil.swap(queue,1,size--); UCv9G/$
fixDown(1); XX@@tzN
} NjL^FqA[
file://fixdown )X dpzWod
private void fixDown(int k) { }>|!Mf]W?R
int j; beN(7jo
while ((j = k << 1) <= size) { Q8^fgI|
if (j < size %26amp;%26amp; queue[j] j++; _#2AdhCu
if (queue[k]>queue[j]) file://不用交换 Q,1TD2)h
break; x<-n}VK\
SortUtil.swap(queue,j,k); equTKM
k = j; 8T2iqqG/1
} kS@6'5U
} _r6aLm2n
private void fixUp(int k) { 8&0+Az"{O
while (k > 1) { >gqd y*Bg
int j = k >> 1; %%=PpKYtSD
if (queue[j]>queue[k]) AlQE;4yX
break; $u`v k|\R
SortUtil.swap(queue,j,k); 4z$}e-
k = j; yhBf%m
} a/(IvOy#6
} /%'>?8/
@&7|Laa
} U<|h4'(@L
%I&[:
} ;g M$%!&
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SortUtil： :mpR}.^hv
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package org.rut.util.algorithm; q!5 *)nw"
!oDX+hd,%>
import org.rut.util.algorithm.support.BubbleSort; { 4(E @
import org.rut.util.algorithm.support.HeapSort; $Bd13%>)
import org.rut.util.algorithm.support.ImprovedMergeSort; T<\!7RnLc
import org.rut.util.algorithm.support.ImprovedQuickSort; s?j` _B
import org.rut.util.algorithm.support.InsertSort; C6-71`C0
import org.rut.util.algorithm.support.MergeSort; z 5T_
import org.rut.util.algorithm.support.QuickSort; x-Cy,d:YX
import org.rut.util.algorithm.support.SelectionSort; l_Ffbs_6t
import org.rut.util.algorithm.support.ShellSort; qBkI9H
tmCm54
/** &$!'Cw`,
* @author treeroot J#pl7q)^w
* @since 2006-2-2 "gR W91 T
* @version 1.0 3*DwXH+
*/ y].vll8R
public class SortUtil { RH+'"f
public final static int INSERT = 1; b.<>CG'
public final static int BUBBLE = 2; ns{BU->f
public final static int SELECTION = 3; ;T6x$e
public final static int SHELL = 4; j#`d%eQ~J
public final static int QUICK = 5; @L)=epC
public final static int IMPROVED_QUICK = 6; [ NSsT>C
public final static int MERGE = 7; X)tf3M {J@
public final static int IMPROVED_MERGE = 8; \U1fUrw$*
public final static int HEAP = 9; s /?&H-
cP4K9:k
public static void sort(int[] data) { k>N >_{\
sort(data, IMPROVED_QUICK); -]uN16\ F
} ?&H1C4
private static String[] name={ TvEN0RV2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (Nky?*
}; +:s]>R eDa
'_~X(izc
private static Sort[] impl=new Sort[]{ j70]2NgX
new InsertSort(), 5K~kzRL$r
new BubbleSort(), |Bv?! sjf
new SelectionSort(), yWs_Z6b
new ShellSort(), ~"Pu6-\VT
new QuickSort(), e@-"B9~
new ImprovedQuickSort(), ae)0Yu`*G7
new MergeSort(), UHtxzp =[
new ImprovedMergeSort(), \Lz2"JI
new HeapSort() Q}?yj,DD
}; 1D,$Az~.
A1zqm_X5)P
public static String toString(int algorithm){ *mc]Oa
return name[algorithm-1]; &*}NN5Sv
} [I`r[u
;FO1b*
public static void sort(int[] data, int algorithm) { k{fCU%
impl[algorithm-1].sort(data); z)Y<@2V*C
} <eObQ[mQ
Bh9O<|E
public static interface Sort { !Cm<K*c"&E
public void sort(int[] data); %'}L.OvG
} x,sMa*vd
b9ON[qOMN
public static void swap(int[] data, int i, int j) { {\OIowa
int temp = data; @$5GxIw<l
data = data[j]; e$k]z HlQ
data[j] = temp; >bf29tr
} CvCk#:@HM
} Cmq.V@