[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; q?qH7={,eu
} qP$)V3l
int i1=l; `B~zB=}
int i2=mid+1; mqtYny'
for(int cur=l;cur<=r;cur++){ _3IRj=Cs
if(i1==mid+1) _SnD)k+TgJ
data[cur]=temp[i2++]; X"sJiFS
else if(i2>r) -\7_^8 am
data[cur]=temp[i1++]; D\| U_>
else if(temp[i1] data[cur]=temp[i1++]; k;Fxr%
else @*E=O|
data[cur]=temp[i2++]; 6ZAZJn|
} $*:g~#bh
} "A> _U<Y
p=m:^9/
} =Qf{
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改进后的归并排序: 6OB3%R'p
l.P;85/+
package org.rut.util.algorithm.support; LJ K0WWch
cbYQ';{
import org.rut.util.algorithm.SortUtil; ^#XQ2UN
(I#mo2
/** B}"V.Msv/
* @author treeroot I1#MS4;$^
* @since 2006-2-2 M?AKJE j5
* @version 1.0 \8g= Ix
*/ Omi/sKFMi
public class ImprovedMergeSort implements SortUtil.Sort { ^ FM
:G#+5 }
private static final int THRESHOLD = 10; FB:nkUR`
+* j8[sz
/* ?\)h2oi!F5
* (non-Javadoc) h?H|)a<^9
* do*aE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nEPTTp+B
*/ S{3c}>n
public void sort(int[] data) { /::Y &&$f
int[] temp=new int[data.length]; _''un3eCY
mergeSort(data,temp,0,data.length-1); . :>e"D
} 5fMlOP_
vt nT
private void mergeSort(int[] data, int[] temp, int l, int r) { S;y4Z:!
int i, j, k; !{{gL=_@
int mid = (l + r) / 2; CxNxb)c &
if (l == r) w0+X;aId
return; ##}7cFX
if ((mid - l) >= THRESHOLD) MTN*{ug2:
mergeSort(data, temp, l, mid); bdLi_k
else L|}s Z\2!
insertSort(data, l, mid - l + 1); ~@)s)K
if ((r - mid) > THRESHOLD) V#b=mp
mergeSort(data, temp, mid + 1, r); rlA/eQrS
else mU~&oU
insertSort(data, mid + 1, r - mid); ~ rQ,%dH
Yufjy=!
for (i = l; i <= mid; i++) { .c:h!-D;
temp = data; jr_z ?
} 3!osQ1
for (j = 1; j <= r - mid; j++) { "DA%vdu
temp[r - j + 1] = data[j + mid]; A)V*faD
} 9X%: ){
int a = temp[l]; ,i??}Wm5G
int b = temp[r]; uo J0wG.
for (i = l, j = r, k = l; k <= r; k++) { D/~1?p
if (a < b) { ]@b9m
data[k] = temp[i++]; 2%L`b"9}V
a = temp; gua7<z6=eh
} else { /PeT4hW}
data[k] = temp[j--]; oC*a;o
b = temp[j]; w/(c}%v}=
} 3l45(%g+
} HKJBR)T
} KYtCN+vsG
'vZIAnB8
/** $Seh4
* @param data 4xr^4\lk
* @param l ~/9RSdv7
* @param i W dD889\
*/ FZ?eX`,
private void insertSort(int[] data, int start, int len) { 0VSIyG_Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A8{ xZsH
} `G/g/>y
} & ]]l0B
} _1qR1<V
} Ao$k[#px
h!K" ;qw
堆排序： *bf 5A9
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package org.rut.util.algorithm.support; g.@[mf0r
mV`R'*1UC
import org.rut.util.algorithm.SortUtil; k|?[EWIi^
q,@# cQBV
/** e4SS'0|
* @author treeroot T+@i;M
* @since 2006-2-2 qvB{vU
* @version 1.0 EI6kBRMo
*/ ~M{/cv
public class HeapSort implements SortUtil.Sort{ /go[}X5QR[
xS tsw5d
/* (non-Javadoc) X"+p=PGZK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qi7C.w;
*/ T=tW'tlT\v
public void sort(int[] data) { 'QG`^@Z
MaxHeap h=new MaxHeap(); IiqqdU]
h.init(data); I V#8W
for(int i=0;i h.remove(); O}Pqbx&
System.arraycopy(h.queue,1,data,0,data.length); xm1di@
} UTKyPCfj
;Y;r%DJ
private static class MaxHeap{ 03v+eT
tm.60udbo
void init(int[] data){ %K|f,w=m
this.queue=new int[data.length+1]; F&R*njJcc
for(int i=0;i queue[++size]=data; xw}yl4WT{
fixUp(size); C0N}B1-MU
} 'hU5]}=
} ^rO"U[To
vRC >=y*=
private int size=0; (FApkvy
AF"7 _
private int[] queue; 4h|*r !
p4f9v:b[
public int get() { 4bA^Gq
return queue[1]; yjL+1_"B
} eZ(ThA*2=t
SgewAng?@o
public void remove() { L}rZ1wV6
SortUtil.swap(queue,1,size--); ; >H1A
fixDown(1); }6-olVg
} L5I!YP#v
file://fixdown !;|#=A9
private void fixDown(int k) { ao9#E"BfM
int j; TYGI f4z
while ((j = k << 1) <= size) { i,<'AL )
if (j < size %26amp;%26amp; queue[j] j++; 3W[?D8yi)
if (queue[k]>queue[j]) file://不用交换 J^jd@E
break; 07:V[@'
SortUtil.swap(queue,j,k); KF+r25uy[+
k = j; EQ~<NzRp=
} N Nk
} |8CxMs
private void fixUp(int k) { W..*!UGl
while (k > 1) { Pz0MafF|T
int j = k >> 1; s,#We} bv
if (queue[j]>queue[k]) C @<T(`o
break; uOzoE_i
SortUtil.swap(queue,j,k); IxuK<Oe:O
k = j; U$gR}8\e
} 5Z_C(5)/Y
} k5aB|xo
o=7,U/{D!
} hJ`Gu7
W/BPf{U
} yYJ_;Va
o-H?q!
SortUtil： *z69ti/ t
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package org.rut.util.algorithm; 2T+-[}*
e&ysj:W5 "
import org.rut.util.algorithm.support.BubbleSort; o+=wQ$"tP
import org.rut.util.algorithm.support.HeapSort; \_,p@r]Q
import org.rut.util.algorithm.support.ImprovedMergeSort; ;@qS#7SRB
import org.rut.util.algorithm.support.ImprovedQuickSort; RN-gZ{AW
import org.rut.util.algorithm.support.InsertSort; \7b, Mz!
import org.rut.util.algorithm.support.MergeSort; Y}R$RDRL
import org.rut.util.algorithm.support.QuickSort; !i-t6f
import org.rut.util.algorithm.support.SelectionSort; 9F[3B`w
import org.rut.util.algorithm.support.ShellSort; M]6+s`?r
;dUKFdKH}
/** bC:sd2s
* @author treeroot Ga02Zk
* @since 2006-2-2 b]z_2h~`
* @version 1.0 rmA?Xlh\
*/ N\__a~'0p
public class SortUtil { '(B -{}l
public final static int INSERT = 1; JS ^Cc
public final static int BUBBLE = 2; "dIWHfQB
public final static int SELECTION = 3; @-[}pZ/
public final static int SHELL = 4; }p6]az3
public final static int QUICK = 5; |#o' =whTl
public final static int IMPROVED_QUICK = 6; WeRDaG
public final static int MERGE = 7; Q/?`);
public final static int IMPROVED_MERGE = 8; xP'0a
public final static int HEAP = 9; jw{N#QDh
|OCiq|#
public static void sort(int[] data) { ?[ )}N _o#
sort(data, IMPROVED_QUICK); >&;J/ME
} 2{=D)aC$f
private static String[] name={ lgiKNZgB?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ")MHP~ ?
}; 0>CG2SRn
K_L7a>Fr
private static Sort[] impl=new Sort[]{ >xo<i8<Miv
new InsertSort(), 8[J%TWq%9
new BubbleSort(), 3>VL>;75[
new SelectionSort(), :1qLRr
new ShellSort(), :'wxm3f
new QuickSort(), Mu`_^gG
new ImprovedQuickSort(), @>46.V{P}B
new MergeSort(), Wo&22,EB
new ImprovedMergeSort(), ":+d7xR?o
new HeapSort() 9~Sa7P
}; YQ:$m5ai
fpQFNV
public static String toString(int algorithm){ 5lHt~hB\
return name[algorithm-1]; gD)M7`4
} 9J7yR}2-F
>mA]2gV<a
public static void sort(int[] data, int algorithm) { V z
impl[algorithm-1].sort(data); Awfd0L;9
} k0j4P^d
X~VI}dJ
public static interface Sort { zu?112-v2
public void sort(int[] data); }\<=B%{
} no-";{c
)R `d x
public static void swap(int[] data, int i, int j) { ]g$ky.;
int temp = data; A7YCSjB
data = data[j]; -<x%
data[j] = temp; 51eZfJB
} X_X7fRC0
} prS%lg>