[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; I=P<RG7j)
} Ux=B*m1@{
int i1=l; 4Xt`L"f
int i2=mid+1; q.@% H}
for(int cur=l;cur<=r;cur++){ ?(Plb&kR
if(i1==mid+1) O2 + K
data[cur]=temp[i2++]; ^si[L52BZ
else if(i2>r) !V/7q'&t=
data[cur]=temp[i1++]; 2:nI4S
else if(temp[i1] data[cur]=temp[i1++]; w5/6+@}
else s6_i>
data[cur]=temp[i2++]; 3kF+wifsz
} R1%J6wZq
} Q%J,:J
S}]B|Q
} ^\J-LU|"B
GY0OVAW6'c
改进后的归并排序: R2 J A(Hn
= 8y,7u)
package org.rut.util.algorithm.support; 5e0d;Rd
),j6tq[
import org.rut.util.algorithm.SortUtil; bF+j%=
tw\1&*:
/** MOp "kA
* @author treeroot W_3BL]^=
* @since 2006-2-2 M_r[wYt!
* @version 1.0 K3,PmI&W
*/ 2*Pk1vrI
public class ImprovedMergeSort implements SortUtil.Sort { !u .n
# kNp);
private static final int THRESHOLD = 10; 8?: 2<
+|5O b
/* D+~*nc~ g
* (non-Javadoc) HPt\ BK
* d'3"A"9R7-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ss\?SEq
*/ &k-NDh3
public void sort(int[] data) { 7-u'x[=m
int[] temp=new int[data.length]; p1HbD`ST
mergeSort(data,temp,0,data.length-1); F8Mf,jnPs
} #qD[dC$[t
elpTak@
private void mergeSort(int[] data, int[] temp, int l, int r) { 3=} P l,
int i, j, k; {{gt>"D,
int mid = (l + r) / 2; T-/3 A%v
if (l == r) /<(-lbq,
return; KHJ wCv
if ((mid - l) >= THRESHOLD) C=cn.CX
mergeSort(data, temp, l, mid); ]?oJxW.
else e-\/1N84
insertSort(data, l, mid - l + 1); 3MKu!
if ((r - mid) > THRESHOLD) ucU7 @j
mergeSort(data, temp, mid + 1, r); +/]*ChrS
else }#g+~9UK
insertSort(data, mid + 1, r - mid); X-TGrdoX
+o"CMI
for (i = l; i <= mid; i++) { R(cg`8
temp = data; .c__T{<)[
} d\JBjT1g
for (j = 1; j <= r - mid; j++) { S'NLj(
temp[r - j + 1] = data[j + mid]; ]IeLKcn
} gMkSl8[
int a = temp[l]; UK*v\TMv
int b = temp[r]; 4*5e0:O
for (i = l, j = r, k = l; k <= r; k++) { WXDo`_{R
if (a < b) { `Lavjmfr2V
data[k] = temp[i++]; LEOa=(mN\
a = temp; l+hOD{F4pS
} else { Em5,Zr_
data[k] = temp[j--]; u%I%4 gM
b = temp[j]; #e,TS`"eD
} kp}[nehF
} s@y;b0$gk
} oGl<i
.c0u##/0
/** 6iF&!Fd>J
* @param data ki/Cpfq40*
* @param l (uhE'IQ{(
* @param i >kmgYWG
*/ niW"o-}
private void insertSort(int[] data, int start, int len) { ;$gV$KB:xA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |_-w{2K
} )& Oxp&x
} Fav++z
} M5t.l(
} k_zn>aR$F
4gNN "
堆排序： Iwh0PfWJ
:M f8q!Q'
package org.rut.util.algorithm.support; -o{ x ;:4
) jvI Nb
import org.rut.util.algorithm.SortUtil; re}PpXRC
r)K5<[\r
/** 3 v.8
* @author treeroot V3r)u\ o'
* @since 2006-2-2 MuP>#Vk
* @version 1.0 3]9Rmx
*/ ,9_O4O%
public class HeapSort implements SortUtil.Sort{ wAX;)PLg
k.o8!aCm
/* (non-Javadoc) N mxh zjJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lcjOBu
*/ -qHG*v,
public void sort(int[] data) { 37Q8Yf_
MaxHeap h=new MaxHeap(); llWY7u"
h.init(data); 1EC;t1.7
for(int i=0;i h.remove(); HuU$x;~
System.arraycopy(h.queue,1,data,0,data.length); z\" .(fIV
} tY!l}:E[
udBIEW,`
private static class MaxHeap{ >P\eHR,{-
c_M[>#`
void init(int[] data){ jWi~Q o+
this.queue=new int[data.length+1]; gTOx|bx
for(int i=0;i queue[++size]=data; : xggo
fixUp(size); "e8EA!Ipte
} :D-D+x
} #W3H;'~/5
bR~(Ry`
private int size=0; _;Xlw{FN^
)z18:C3
private int[] queue; u~Po5W/i
gW--[
public int get() { >wt.)c?5
return queue[1]; kD%MFT4
} y%61xA`#
1r}i[5
public void remove() { \=im{(0h
SortUtil.swap(queue,1,size--); Y&U-d{"
fixDown(1); Haekr*1%
} 2rf8)8':
file://fixdown n8_X<jIp3
private void fixDown(int k) { =N{?ll6x7g
int j; :l!sKT?:d!
while ((j = k << 1) <= size) { l>pB\<LL
if (j < size %26amp;%26amp; queue[j] j++; xRhGBb{@s
if (queue[k]>queue[j]) file://不用交换 oq!\100
break; K\XQE50
SortUtil.swap(queue,j,k); F~ \ONO5
k = j; ort*Ux)
} CsycR@[
} KW[y+c u.#
private void fixUp(int k) { q0Q[]|L
while (k > 1) { z~3ubta8(@
int j = k >> 1; Ax;?~v4Z
if (queue[j]>queue[k]) n_RZ:<Gr
break; t=@d`s:R2
SortUtil.swap(queue,j,k); kc P ZIP:
k = j; R.HvqO
} b+J|yM<`
} z _\L@b
Z$KyK.FUU
} %N~c9B
W,Q>3y*
} RMT9tXe*5
R3lZ|rxv:
SortUtil： JQ0Z%;"
LTo!DUi`
package org.rut.util.algorithm; stUv!
hLgX0QV
import org.rut.util.algorithm.support.BubbleSort; m?B=?;B9#
import org.rut.util.algorithm.support.HeapSort; Fs $FR-x
import org.rut.util.algorithm.support.ImprovedMergeSort; |gP)lR
import org.rut.util.algorithm.support.ImprovedQuickSort; *P/A&"i[E
import org.rut.util.algorithm.support.InsertSort; o4EY2
import org.rut.util.algorithm.support.MergeSort; S|k@D2k=
import org.rut.util.algorithm.support.QuickSort; 9ck"JMla
import org.rut.util.algorithm.support.SelectionSort; tugIOA
import org.rut.util.algorithm.support.ShellSort; -bOtF%
CkNR{?S
/** yx-"&K=`
* @author treeroot mHju$d
* @since 2006-2-2 Is3Y>oX
* @version 1.0 cyB+(jLHDs
*/ XIbxi
public class SortUtil { 85Yi2+8f4
public final static int INSERT = 1; '[F`!X
public final static int BUBBLE = 2; hp2E! Cma
public final static int SELECTION = 3; \-6y#R-B
public final static int SHELL = 4; !h7:rv/
public final static int QUICK = 5; *qSvSY*
public final static int IMPROVED_QUICK = 6; OhCdBO
public final static int MERGE = 7; +[uh);vD`G
public final static int IMPROVED_MERGE = 8; l:eC+[_;>
public final static int HEAP = 9; ~zac.:a8
kJf0..J[#<
public static void sort(int[] data) { 8\'tfHL
sort(data, IMPROVED_QUICK); hOZTD0
} Ezew@*(
private static String[] name={ >"<s7$g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w/(T
}; Nh^I{%.x
!9$}1_,is
private static Sort[] impl=new Sort[]{ db_?da;!`
new InsertSort(), R0*P,~L;|
new BubbleSort(), {-me;ayk
new SelectionSort(), @^YXE,
new ShellSort(), cRr3!<EZ
new QuickSort(), VpHwc!APq
new ImprovedQuickSort(), DGCvH)Q
new MergeSort(), ((`{-y\K
new ImprovedMergeSort(), lrKT?siB
new HeapSort() gvo98Id
}; *#}=>, v
\{ QH^
public static String toString(int algorithm){ f~P YK
return name[algorithm-1]; E`^D9:3:)
} 45.g;
ZZ^A&%E(a
public static void sort(int[] data, int algorithm) { (VN'1a (
impl[algorithm-1].sort(data); oz{X"jfu
} Ar/P%$Zfq
W[)HFh(#
public static interface Sort { hkb\GcOj
public void sort(int[] data); }DjVZ48
} }[PwA[k'
#BBDI
public static void swap(int[] data, int i, int j) { a-,*iK{_u
int temp = data; ]6`K
data = data[j]; MDIPoS3BRa
data[j] = temp; CStNCBZ|\
} YiuV\al
} DU"Gz!X]Jd