[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%V%!803!
} IuWX*b`v
int i1=l; ~mcZUiP9
int i2=mid+1; H8"tbU
for(int cur=l;cur<=r;cur++){ o@@w^##
if(i1==mid+1) vUfO4yfdg
data[cur]=temp[i2++]; 5xv,!/@
else if(i2>r) Fs9W>*(
data[cur]=temp[i1++]; #,Bj!'Q'-
else if(temp[i1] data[cur]=temp[i1++]; q5gP~*?
else MVuP |&:n
data[cur]=temp[i2++]; 7X:hIl
} ,A?v,Fs>O[
} 7n>|D^
&`sR){R
} {9:hg9;E*
L3>4t: 8
改进后的归并排序: jrdtd6b}
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package org.rut.util.algorithm.support; 4i96UvkZ
q]?+By-0
import org.rut.util.algorithm.SortUtil; [R$liN99z;
}Y$VB%&Hy
/** W#Cq6N
* @author treeroot }amE6
* @since 2006-2-2 *hl<Y,W(
* @version 1.0 ,m"l\jP
*/ " V/k<HRw
public class ImprovedMergeSort implements SortUtil.Sort { _6/Qp`s
R_~F6O^EO
private static final int THRESHOLD = 10; fcn_<Yh0W
xF^r`
/* %SFw~%@3&~
* (non-Javadoc) y(ldO;.
* j~Ff/O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tpd|y|
*/ '&{(:,!B
public void sort(int[] data) { z8tt+AU
int[] temp=new int[data.length]; X &09
mergeSort(data,temp,0,data.length-1); QJ6f EV$~
} =/f74s t
X[Y#+z4
private void mergeSort(int[] data, int[] temp, int l, int r) { `ITDTZ J
int i, j, k; 34]%d<;A
int mid = (l + r) / 2; _]Z$YM
if (l == r) 1(D1}fcul
return; q2D`1nT
if ((mid - l) >= THRESHOLD) fVv$K&
mergeSort(data, temp, l, mid); aeQ{_SK
else r6<ArX$Yl
insertSort(data, l, mid - l + 1); DvU~%%(0^
if ((r - mid) > THRESHOLD) W|)(|W
mergeSort(data, temp, mid + 1, r); s>V*=#L
else 6l=M;B7:i
insertSort(data, mid + 1, r - mid); 1gL8$.B?
vatx+)
for (i = l; i <= mid; i++) { lTd+{TF.
temp = data; t>=GVu^
} a#>t+.dd
for (j = 1; j <= r - mid; j++) { o^N%;d1%E
temp[r - j + 1] = data[j + mid]; !fif8kf
} Yr Preuh
int a = temp[l]; R2'C s
int b = temp[r]; g9! dpP
for (i = l, j = r, k = l; k <= r; k++) { Lp~c
if (a < b) { mn,=V[f
data[k] = temp[i++]; #`2GAM];7
a = temp; WodF -bE
} else { l,ZzB,"
data[k] = temp[j--]; 69[w/\
b = temp[j]; `z5v}T
} #=>kw^5
} ye9QTK6$,
} Pau&4h0
VK"[=l
/** dVK@Fgo
* @param data zX006{vig
* @param l Ebmqq#SHjX
* @param i InTKdr^ P
*/ 6S` ,j
private void insertSort(int[] data, int start, int len) { HP1X\h!Ke
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h%4~0
} ^2(";.m
} Ykx&6M@t
} D}3cW2!9
} wpJ^}+kF
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堆排序： qM+!f2t
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package org.rut.util.algorithm.support; >7eu'
47$-5k30
import org.rut.util.algorithm.SortUtil; w4>:uyE
uBV^nUjS"m
/** Bx_8@+
* @author treeroot 1WZKQeOo
* @since 2006-2-2 e/ppZ>
* @version 1.0 X*D5y8<
*/ *m2d#f
public class HeapSort implements SortUtil.Sort{ ant-\w>}
uugzIV)
/* (non-Javadoc) 4?*`:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]*t*/j;N
*/ _~(MA-l
public void sort(int[] data) { j.e`ip
MaxHeap h=new MaxHeap(); M]pel\{M
h.init(data); 6-Vl#Lyb
for(int i=0;i h.remove(); NiU tH
System.arraycopy(h.queue,1,data,0,data.length); f^>lObvd
} xf{C'uF/
cPa 0n4
private static class MaxHeap{ mDe+ M{/
fNmG`Ke
void init(int[] data){ ;nHo%`Zt
this.queue=new int[data.length+1]; xw/h~:NT
for(int i=0;i queue[++size]=data; "J0Oa?
fixUp(size); WL*W=(
} p3'mJ3MA
} 8EVF<@{]
(D+{0 /
private int size=0; "m\UqQGX
8P'En+uE1|
private int[] queue; -;DE&~p
!ktA"Jx
public int get() { %`<`z yf
return queue[1]; Y+Q,4s
} ~,3v<A[5Vi
a#~Z5>{
public void remove() { y("0Xve
SortUtil.swap(queue,1,size--); n?KS]ar>
fixDown(1); _tR.RAaa"
} 4jZi62
file://fixdown jd*%.FDi{
private void fixDown(int k) { PxCl]~v
int j; M,v@G$pW
while ((j = k << 1) <= size) { 3K;b~xg`nw
if (j < size %26amp;%26amp; queue[j] j++; @a7(*<".
if (queue[k]>queue[j]) file://不用交换 k%4A::=
break; qS[p|*BL
SortUtil.swap(queue,j,k); Qe=Q8cT
k = j; O(sFs1
} 1x<rh\oo
} =.=. \K
private void fixUp(int k) { \]d*h]Hms
while (k > 1) { b~jvmcr
int j = k >> 1; Rcm(Y7
if (queue[j]>queue[k]) "Jv,QTIcS
break; I! eSJTN
SortUtil.swap(queue,j,k); H:nu>pzt
k = j; @|*Z0bn'
} e7j]BzGvl
} L)//- k9
+#*z"a`
} :J)lC =
,Elga}7u
} DF&jZ[##
dXcMysRc%&
SortUtil： N<i Vs
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package org.rut.util.algorithm; /dP8F
|LGNoP}SA
import org.rut.util.algorithm.support.BubbleSort; p2_Zsq
import org.rut.util.algorithm.support.HeapSort; MZ+IorZl
import org.rut.util.algorithm.support.ImprovedMergeSort; '[ddE!ta
import org.rut.util.algorithm.support.ImprovedQuickSort; <t|9`l_XW
import org.rut.util.algorithm.support.InsertSort; 4uE5h~0Z
import org.rut.util.algorithm.support.MergeSort; Q; /!oA_
import org.rut.util.algorithm.support.QuickSort; V{^fH6;[
import org.rut.util.algorithm.support.SelectionSort; !NY^(^
import org.rut.util.algorithm.support.ShellSort; 5Vm}<8{
QCY{D@7T
/** So]FDd
* @author treeroot 9+;f1nV
* @since 2006-2-2 ^OcfM_4pN
* @version 1.0 `"-!UkD+
*/ "=RoI
public class SortUtil { mUY:S |
public final static int INSERT = 1; p<nBS"/
public final static int BUBBLE = 2; "5DAGMU
public final static int SELECTION = 3; LB ^^e"
public final static int SHELL = 4; 71m-W#zyA
public final static int QUICK = 5; !Z2n;.w
public final static int IMPROVED_QUICK = 6; V6!73 iY
public final static int MERGE = 7; "aO,
public final static int IMPROVED_MERGE = 8; KUqS(u
public final static int HEAP = 9; )p_LkX(
^~IcQ!j/5
public static void sort(int[] data) { E@}j}/%'O
sort(data, IMPROVED_QUICK); l8d%hQVqT
} 7G=P|T\
private static String[] name={ Da[X HUk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L$kAe1 V^m
}; v{*X@)$
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private static Sort[] impl=new Sort[]{ x$b[m20
new InsertSort(), <`p'6n79
new BubbleSort(), 4qXUk:C@m
new SelectionSort(), +Y^F>/4=Y
new ShellSort(), \gQ+@O&+
new QuickSort(), l@F e(^5E
new ImprovedQuickSort(), HNyDWD)_
new MergeSort(), +rw3.d
new ImprovedMergeSort(), nMvIL2:3
new HeapSort() |.8=gS5
}; =F-^RnO%\
@"7dk.|
public static String toString(int algorithm){ ~u&O
return name[algorithm-1]; TUn@b11
} 3E@&wpj
%+"AF+c3r
public static void sort(int[] data, int algorithm) { sO-R+G/^7
impl[algorithm-1].sort(data); RtM.}wv;
} kx(:Z8DX
zate%y
public static interface Sort { #_|^C(]!
public void sort(int[] data); iDxgAV f*
} @Odu.F1e
qr;" K?NX
public static void swap(int[] data, int i, int j) { M_)T=s *
int temp = data; 5h7DVr!
data = data[j]; m:7bynT{
data[j] = temp; oh~Dbu=%
} 3yX^R^`
} %6:2cR