[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; gS$A
} tjxvN 4l
int i1=l; 4RQ5(YTTuR
int i2=mid+1; p{.8_#O%S
for(int cur=l;cur<=r;cur++){ H$tb;:
if(i1==mid+1) 1[DS'S
data[cur]=temp[i2++]; 4j3oT)+8
else if(i2>r) f#P_xn&et
data[cur]=temp[i1++]; #ElejQ|?
else if(temp[i1] data[cur]=temp[i1++]; l>7r2;
else l1<?ONB.#
data[cur]=temp[i2++]; u+2Lm*M
} A5XR3$5P
} gs`> C(
3eKQ<$w
} O<GF>
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改进后的归并排序: ><Uk*mwL
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package org.rut.util.algorithm.support; $bGD%9 z
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import org.rut.util.algorithm.SortUtil; %&<W(|U1<
~E*d G
/** GZ8:e3ri
* @author treeroot l h/&__
* @since 2006-2-2 a+?~;.i~
* @version 1.0 y $V[_TN
*/ ~>%DKJe
public class ImprovedMergeSort implements SortUtil.Sort { !Iq{ 5:
HC7JMj
private static final int THRESHOLD = 10; ez*jjm
Nn#u%xvJt
/* (~()RkT
* (non-Javadoc) SLoo:)
* ~m`!;rE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) inF6M8 A1
*/ Nl*i5 io
public void sort(int[] data) { k/lFRi-i
int[] temp=new int[data.length]; f=I:DkR
mergeSort(data,temp,0,data.length-1); $(q8y/,R*-
} ZnXejpj)D
ax@H"d&
private void mergeSort(int[] data, int[] temp, int l, int r) { f\K#>u* Q
int i, j, k; ]rW8y%yD
int mid = (l + r) / 2; ^?"^Pmw
if (l == r) (wA?;]q(
return; -7`-wu
if ((mid - l) >= THRESHOLD) z[&s5"
mergeSort(data, temp, l, mid); P*G+eqX
else ,7,;twKz
insertSort(data, l, mid - l + 1); +LzovC@^
if ((r - mid) > THRESHOLD) 6/2v
mergeSort(data, temp, mid + 1, r); JSW&rn
else Eark)
insertSort(data, mid + 1, r - mid); )U(u>SV(\
`ROEV~
for (i = l; i <= mid; i++) { 'sU)|W(3U
temp = data; UR3$B%i
} H_B~P%E@]
for (j = 1; j <= r - mid; j++) { P5URvEnz:
temp[r - j + 1] = data[j + mid]; |}S1o0v{(a
} :vQM>9l7
int a = temp[l]; agsISu(
int b = temp[r]; p4mY0Y]mP
for (i = l, j = r, k = l; k <= r; k++) { _#'9kx|)
if (a < b) { aWaw&u
data[k] = temp[i++]; *Bw#c j
a = temp; nj2gs,k
} else { W_<4WG
data[k] = temp[j--]; Lq04T0
b = temp[j]; ^ d\SPZ
} ?q Xs-
} v0 ];W|
} uva\0q
#IX&9 aFB}
/** zj20;5o>U&
* @param data Z"tQpJg
* @param l B8~=RmWLl
* @param i 4/MNqit+
*/ bUvK
private void insertSort(int[] data, int start, int len) { 6tdI6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )N)ljA3]
} (I=6Nnt'
} Efr&12YSS
} [ud|dwP"
} &O tAAE
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堆排序： 8"M<{72U]
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package org.rut.util.algorithm.support; cyMs(21
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import org.rut.util.algorithm.SortUtil; K0<yvew
9^zx8MRXd
/** 2Xgx*'t\
* @author treeroot D[~}uZ4\
* @since 2006-2-2 cht
* @version 1.0 Gvn: c/m;
*/ ]u=Ca#!'
public class HeapSort implements SortUtil.Sort{ PU+1=%'V
Hsl{rN
/* (non-Javadoc) ^saM$e^c:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7bT /KLU
*/ xOIg|2^8
public void sort(int[] data) { p7UTqKi
MaxHeap h=new MaxHeap(); 1+^n!$
h.init(data); l* Y[^'
for(int i=0;i h.remove(); evOb
System.arraycopy(h.queue,1,data,0,data.length); qGa<@ b
} 0yTQ{'Cc
b *9-}g:
private static class MaxHeap{ c[{UI
C BlXC7_Mi
void init(int[] data){ XnY"oDg^>
this.queue=new int[data.length+1]; ~:Ixmqi}R
for(int i=0;i queue[++size]=data; o<J5!
fixUp(size); .e$%[)D
} q{@P+2<wF
} sVoR?peQ
\HG$V>2
private int size=0; >0V0i%inmF
cY~M4:vgT
private int[] queue; czS7-Hh@
Ilef+V^qr
public int get() { Nt,~b^9
return queue[1]; *(nJX.7
} jGiw96,Y
Ky6+~>
public void remove() { Y^3)!>
SortUtil.swap(queue,1,size--); m&cvU>lC
fixDown(1); $WClpvVj
} Y?t2,cm
file://fixdown eP?~-#
private void fixDown(int k) { kp; &cQu!
int j; mt^`1ekoY
while ((j = k << 1) <= size) { Gc^t%Ue-H)
if (j < size %26amp;%26amp; queue[j] j++; w&C1=v -h
if (queue[k]>queue[j]) file://不用交换 3W'FcE)|E
break; P'F~\**5
SortUtil.swap(queue,j,k); -%=RFgU4
k = j; Ge1duRGa
} i*z0Jf["
} D&f!( n
private void fixUp(int k) { CPGL!:
while (k > 1) { feN!_-
int j = k >> 1; `x*/UCy\
if (queue[j]>queue[k]) _G[6+g5|
break; &L'6KEahR
SortUtil.swap(queue,j,k); e3pnk =u
k = j; ]Y=S
} d QDLI
} a_AJ)4
( mt*y]p?
} V:8@)Hc=
vuW-}fY;
} 01o [!nT
| F8]Xnds
SortUtil： c`pYc
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package org.rut.util.algorithm; p$XnOh
3jS7 uU
import org.rut.util.algorithm.support.BubbleSort; n@_)fFD%
import org.rut.util.algorithm.support.HeapSort; RB *P0
import org.rut.util.algorithm.support.ImprovedMergeSort; A`g.[7
import org.rut.util.algorithm.support.ImprovedQuickSort; q6Rw4
import org.rut.util.algorithm.support.InsertSort; y%FYXwR{
import org.rut.util.algorithm.support.MergeSort; yE<,Z%J[n
import org.rut.util.algorithm.support.QuickSort; #'wL\3
import org.rut.util.algorithm.support.SelectionSort; 1j+eD:d'
import org.rut.util.algorithm.support.ShellSort; y{?Kao7Ij
X4Lsvvz%@
/** b70AJe=
* @author treeroot fmBkB8
* @since 2006-2-2 k}#@8n|b
* @version 1.0 !@A|L#*
*/ ]M uF9={
public class SortUtil { y]w )`}Ax
public final static int INSERT = 1; ~PCTLP~zI
public final static int BUBBLE = 2; DVbYShB
public final static int SELECTION = 3; ML"_CQlE7
public final static int SHELL = 4; 5R)[Ou.
public final static int QUICK = 5; M.X}K7Z_/
public final static int IMPROVED_QUICK = 6; @}ZGY^
public final static int MERGE = 7; b#e]1Q
public final static int IMPROVED_MERGE = 8; t&38@p
public final static int HEAP = 9; ?~{rf:Y
N-Qu/,~+
public static void sort(int[] data) { `..EQBM
sort(data, IMPROVED_QUICK); % /~os2R
} 5VuCU
private static String[] name={ A(PE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g^qz&;R]
}; 1xq3RD
Ca$y819E2
private static Sort[] impl=new Sort[]{ y(V&z"wk[
new InsertSort(), ^kc>m$HY
new BubbleSort(), \A` gK\/h
new SelectionSort(), Q=^ktKMeR
new ShellSort(), 1<;\6sg
new QuickSort(), H^ESAs6
new ImprovedQuickSort(), k>7gy?Y!K<
new MergeSort(), (\T8!s{AO
new ImprovedMergeSort(), 7sCR!0
new HeapSort() N`J:^,H
}; :PHUsy
<Sz>ZIISd
public static String toString(int algorithm){ M?QQr~a
return name[algorithm-1]; %g!yccD9
} -7&^jP\,
B?$S~5 }
public static void sort(int[] data, int algorithm) { c(QG4.)m
impl[algorithm-1].sort(data); y>DfM5>
} #FrwfJOV
<\B],M1=s=
public static interface Sort { v(i1Z}*b
public void sort(int[] data); er&uC4Y]a
} b #o}=m
;D%$Eh&oma
public static void swap(int[] data, int i, int j) { yg]suU<z]
int temp = data; Oex{:dO "F
data = data[j]; M!;`(_2
data[j] = temp; j<`I\Pmv
} 23(B43zy
} n's2/9x