[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; PKu+$
} b:>(U.
int i1=l; iwL\Ha
int i2=mid+1; 8@qYzSx[
for(int cur=l;cur<=r;cur++){ 8J%^gy>m]
if(i1==mid+1) dKw*L|5
data[cur]=temp[i2++]; r}9qK%C G.
else if(i2>r) 4)iSz>
data[cur]=temp[i1++]; :t]YPt
else if(temp[i1] data[cur]=temp[i1++]; Fy<dk}@
else koC2bX
data[cur]=temp[i2++]; )k3zOKZ;
} K!k,]90Ko
} TC3xrE:U<m
mz[rB|v"/7
} K%>uSS?
9xC,i )
改进后的归并排序: Q5iuK#/
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package org.rut.util.algorithm.support; &`<j!xlG
iD_NpH q
import org.rut.util.algorithm.SortUtil; y`=A$>A
xF5q=%n
/** 'rU [V+
* @author treeroot y-{^L`%Mk
* @since 2006-2-2 ]E88zWDY`
* @version 1.0 ooByGQ90V:
*/ X#-U
public class ImprovedMergeSort implements SortUtil.Sort { 3t(nV4uDF
./)A6O*#
private static final int THRESHOLD = 10; %?_pSH}$!
) ]U-7
/* JMw1qPJQ
* (non-Javadoc) I1 j-Q8
* R\MM2_I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _;{n+i[
*/ (D{Fln\
public void sort(int[] data) { k#ED#']N
int[] temp=new int[data.length]; Q! ]
mergeSort(data,temp,0,data.length-1); 8\`]T%h
} Z6X?M&-Lz
Ta%{Wa\U9z
private void mergeSort(int[] data, int[] temp, int l, int r) { *8fnxWR
int i, j, k; @P4fR7
int mid = (l + r) / 2; Tl%#N"
if (l == r) :p(3Ap2TY
return; gc7S_D~;
if ((mid - l) >= THRESHOLD) |SZRO,7x
mergeSort(data, temp, l, mid); 3.?PdK&C
else Ej ip%m
insertSort(data, l, mid - l + 1); 4\Y2{Z>P?
if ((r - mid) > THRESHOLD) ]0zXpMNI
mergeSort(data, temp, mid + 1, r); 1-1x,U7w
else 8k]'P*9ulz
insertSort(data, mid + 1, r - mid); jhUab],
pA+W 8v#*
for (i = l; i <= mid; i++) { sbrU;X_S
temp = data; d /jO~+jP
} &|IY=$-
for (j = 1; j <= r - mid; j++) { ^{_`jE
temp[r - j + 1] = data[j + mid]; <jQ?l%\
} 9@#Z6[=R,
int a = temp[l]; ,;'9PsIS^
int b = temp[r]; R>To L
for (i = l, j = r, k = l; k <= r; k++) { jtV{Lf3<
if (a < b) { 0~H(GG$VH
data[k] = temp[i++]; vL`wn=
a = temp; OO]~\j
} else { &p^S6h
data[k] = temp[j--]; N't*eCi
b = temp[j]; C+cSy'VIK!
} @U_w:Q<9u
} kV(}45i]s
} [P]zdw w#
Lf&p2p?~c
/** ?0WJB[/
* @param data <bWhTNOb
* @param l +n%uIv
* @param i m\__Fl
*/ ZTWbe
private void insertSort(int[] data, int start, int len) { ;M{ @23?`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :kfHILi
} X5cl'J(j9
} bBc<yaN
} 0R>M_|
} :Oo(w%BD]
/-b)`%Q|Y
堆排序： *T*=~Y4kE
Y5$5qQ
package org.rut.util.algorithm.support; j08}5Eo
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import org.rut.util.algorithm.SortUtil; G)';ucs:,
Pq>r|/~_
/** {v}f/cu
* @author treeroot o>WH;EBL
* @since 2006-2-2 8xs[{?|:
* @version 1.0 .vj`[?T
*/ S "R]i
public class HeapSort implements SortUtil.Sort{ PGsXB"k<8
iE, I\TY[
/* (non-Javadoc) 9; HR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r]sv50Fy
*/ 7JD jJQy
public void sort(int[] data) { [nJ),9$z_
MaxHeap h=new MaxHeap(); z/)HJo2#
h.init(data); fD
for(int i=0;i h.remove(); \]e"#"v}}_
System.arraycopy(h.queue,1,data,0,data.length); 2K'3ry)[y
} ^I@1y}xi
ZWQrG'$?o8
private static class MaxHeap{ k]!Fh^O~,
r9sW:cM:e
void init(int[] data){ hW$B;
this.queue=new int[data.length+1]; V~tq _
for(int i=0;i queue[++size]=data; 1hw1AJ}(F
fixUp(size); aB;syl{
} Q>] iRx>MZ
} ^&MMtWR
$J>GCY
private int size=0; acz8 H0cS
o;.PZi2k
private int[] queue; ;t{Ew+s
dFFJw[$8w
public int get() { nR-`;lrF~
return queue[1]; Mdsn"Y V
} @tWyc%t
cJd~UQ<k
public void remove() { t8DySFT
SortUtil.swap(queue,1,size--); rn#FmM
fixDown(1); :3M2zV cf
} Q3vC^}Dmr
file://fixdown 4d#w}
private void fixDown(int k) { NJ^`vWi
int j; {O9CYP:
while ((j = k << 1) <= size) { [x ?38
if (j < size %26amp;%26amp; queue[j] j++; JziuwL5,
if (queue[k]>queue[j]) file://不用交换 wN\%b}pp
break; U:ggZ`.
SortUtil.swap(queue,j,k); NBuibL
k = j; 1{i)7:Y
} Kv^ez%I
} fNNkc[YTZI
private void fixUp(int k) { ^I=c]D]);
while (k > 1) { Veo:G{
int j = k >> 1; !'o5X]s
if (queue[j]>queue[k]) XW w=3$
break; Y u\<
SortUtil.swap(queue,j,k); la:i!qAH
k = j; o4,fwPkB
} &4Q(>"iL4
} 6!bp;iLKy
WeNx9+2=Z
} s+&Ts|c#
:Fz;nG-G
} ?piv]Z
{</MC`
SortUtil： _-eF &D
,_@C(O
package org.rut.util.algorithm; PXqLK3AE
3^AycwNBA
import org.rut.util.algorithm.support.BubbleSort; d0ThhO
import org.rut.util.algorithm.support.HeapSort; ++d(}^C;
import org.rut.util.algorithm.support.ImprovedMergeSort; xdb9oH
import org.rut.util.algorithm.support.ImprovedQuickSort; -Zx hh
import org.rut.util.algorithm.support.InsertSort; 1t haQ"
import org.rut.util.algorithm.support.MergeSort; /fC@T
import org.rut.util.algorithm.support.QuickSort; =+9.X8SP
import org.rut.util.algorithm.support.SelectionSort; ]#=43
import org.rut.util.algorithm.support.ShellSort; H=Rqr
PPSf8-MLW
/** 9v>BP`Mg
* @author treeroot EN/>f=%
* @since 2006-2-2 Pz#D9.D0
* @version 1.0 eSo/1D
*/ c6FKpdn%
public class SortUtil { "~jSG7h
public final static int INSERT = 1; c`}-i6
public final static int BUBBLE = 2; ivg:`$a[
public final static int SELECTION = 3; ?tS=rqc8oW
public final static int SHELL = 4; :9un6A9JS
public final static int QUICK = 5; Y[Jt+p]
public final static int IMPROVED_QUICK = 6; |g<1n
public final static int MERGE = 7; }#}IR5`=E
public final static int IMPROVED_MERGE = 8; M\O6~UFq!
public final static int HEAP = 9; Tap=K|b ]
g /D@/AU1u
public static void sort(int[] data) { VP[-BK[
sort(data, IMPROVED_QUICK); BayO+,>K
} ;AMbo`YK[
private static String[] name={ ]vj4E"2;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q}gj.@Q"
}; {* S8n09v
8Q&.S)hrN
private static Sort[] impl=new Sort[]{ !T;*F%G9
new InsertSort(), PkA_uDhw
new BubbleSort(), y+xw`gR:
new SelectionSort(), w:xLg.Eq6
new ShellSort(), "Y0:Y?Vz"
new QuickSort(), par|j]
new ImprovedQuickSort(), gI8r SmH
new MergeSort(), &Fo)ea
new ImprovedMergeSort(), #eSVFD5ZU
new HeapSort() q>:>f+4
}; 7 j$ |fS
;AyE(|U+
public static String toString(int algorithm){ W/_=S+CvK
return name[algorithm-1]; lg` Qi&
} [<SM*fQ>t
6v~` jS%3
public static void sort(int[] data, int algorithm) { y,&.<Yc
impl[algorithm-1].sort(data); b<,Z^Z_
} P\<dy?nZ
N2:};a[ui5
public static interface Sort { `L p3snS
public void sort(int[] data); XQL"D)fw
} Zwy8SD'L
Sh'>5z2
public static void swap(int[] data, int i, int j) { rmpx8CY"
int temp = data; k8fvg4
data = data[j]; o=i)s2
data[j] = temp; %gj's-!!
} (2J_Y*N~>
} n';"c;Ye)