[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; eN|zD?ba&
} \'u+iB g
int i1=l; 3I)oqS@q'
int i2=mid+1; I4w``""c
for(int cur=l;cur<=r;cur++){ %%n&z6w-
if(i1==mid+1) Fje /;p
data[cur]=temp[i2++]; '_Pb\ jK
else if(i2>r) 4clCZ@\K^
data[cur]=temp[i1++]; )'g4Ty
else if(temp[i1] data[cur]=temp[i1++]; J Q*~le*
else !Sy9v
data[cur]=temp[i2++]; ".Q]FE@>
} #DguV
} 0Bp0ScE|FA
7Dl^5q.|
} 'Kkp!eZQ~
I]5){Q"S
改进后的归并排序: h(}#s1Fzq
> 2/j
package org.rut.util.algorithm.support; H(--hG5}
u81F^72U
import org.rut.util.algorithm.SortUtil; {yT<22Fl
8KigGhY'ms
/** c[X6!_
* @author treeroot G.iQ\'1_h
* @since 2006-2-2 MFO%F) 5
* @version 1.0 ;,TT!vea
*/ --TH6j"
public class ImprovedMergeSort implements SortUtil.Sort { jt323hHth
fM:bXR2Y'
private static final int THRESHOLD = 10; kO^
2,B^OZmw
/* ~Ni-}p
* (non-Javadoc) Wt!;Y,1s
* W^ask[46R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o](ORS$~
*/ rO#$SW$YW
public void sort(int[] data) { &1=,?s]&
int[] temp=new int[data.length]; Fd80T6[
mergeSort(data,temp,0,data.length-1); `LIlR8&@aX
} WTt /y\'6
K^GvU0\
private void mergeSort(int[] data, int[] temp, int l, int r) { d/3&3>/
int i, j, k; \!uf*=d
int mid = (l + r) / 2; )PU\|I0|)e
if (l == r) s/E9$*0
return; c<cYX;O
if ((mid - l) >= THRESHOLD) X3gYe-2
mergeSort(data, temp, l, mid); X%iqve"{nB
else wT;;B=u}G
insertSort(data, l, mid - l + 1); b+ZaZ\-y |
if ((r - mid) > THRESHOLD) iK'A m.o+
mergeSort(data, temp, mid + 1, r); kaR55
else p>pAU$k{O
insertSort(data, mid + 1, r - mid); s%>u[-9U
^dxy%*Z/
for (i = l; i <= mid; i++) { Kb5}M/8
temp = data; C5Fq%y{$.
} 1ATH$x
for (j = 1; j <= r - mid; j++) { DX3jE p2
temp[r - j + 1] = data[j + mid]; 2%fkXH<
} [vY)y\W{
int a = temp[l]; 98<^!mwF
int b = temp[r]; c[OQo~m$
for (i = l, j = r, k = l; k <= r; k++) { M5`m5qc3
if (a < b) { /n,a0U/
data[k] = temp[i++]; 6w{""K.{
a = temp; cY~lDLyB
} else { uSCI
data[k] = temp[j--]; O,J,Q|`H&
b = temp[j]; ov!L8 9`[u
} lu1T+@t
} d]=>U^K
} #&{)`+!"
u6\W"LW
/** \vj xCkg{
* @param data =PLy^%
* @param l 5KYR"-jY
* @param i u<j.XPK
*/ }zeKf/?'
private void insertSort(int[] data, int start, int len) { f'S0"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #]}G{ P
} L`^v"W()
} \jkDRR[
} F 'HYWH0?
} 6ESS>I"su
)OGO wStz
堆排序： "bO]AG
GCcSI;w
package org.rut.util.algorithm.support; J/vcP
EJaO"9 (
import org.rut.util.algorithm.SortUtil; Gn10)Uf8X
A#79$[>w
/** N *n?hN
* @author treeroot ><6g-+*k
* @since 2006-2-2 %=v<3
* @version 1.0 *qIns/@
*/ *nUa0Zg4q6
public class HeapSort implements SortUtil.Sort{ jN7Z}1`
R ta_\Aj!
/* (non-Javadoc) DB] ]6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IifH=%2Y
*/ xU9^8,6
public void sort(int[] data) { U:IeMf-;
MaxHeap h=new MaxHeap(); I)G.tJZ e
h.init(data); "r{ ^Y??
for(int i=0;i h.remove(); z]i/hU
System.arraycopy(h.queue,1,data,0,data.length); m%OX< T!
} #xrE^Txh
jRjQDK_"ka
private static class MaxHeap{ Rmh,P>
<,T#* fg
void init(int[] data){ @eDL j}
this.queue=new int[data.length+1]; )#cGePA
for(int i=0;i queue[++size]=data; _Q\u-VN*hv
fixUp(size); ><;.vP
} n8e}8.Bu
} 3Q+THg3~?
qSL~A-
private int size=0; KH1/B_.\V
X@B,w_b
private int[] queue; @j4~`~8
eJ$ {`&J
public int get() { B;L^!sLP
return queue[1]; 2) A$bx
} Bk1gE((
C?b_E
public void remove() { *:,7 A9LY
SortUtil.swap(queue,1,size--); s|8_R;
fixDown(1); x"PMi[4
} N &vQis
file://fixdown C F<
private void fixDown(int k) { d4-cZw}+
int j; .aR$ou,7
while ((j = k << 1) <= size) { <H!;/p/S
if (j < size %26amp;%26amp; queue[j] j++; B3Esfk
if (queue[k]>queue[j]) file://不用交换 P1QGfp0-J
break; RDp(Ci
SortUtil.swap(queue,j,k); hLLg
k = j; JSiLG0
} QGd"Z lQ
} '^M3g-C[Jg
private void fixUp(int k) { )8Sm}aC
while (k > 1) { 5fa_L'L#
int j = k >> 1; {R.@EFkZ
if (queue[j]>queue[k]) *,__\/U98
break; ^)/oDyO
SortUtil.swap(queue,j,k); eTa[~esu.
k = j; [5kaF"
} ma26|N5
} ag$UNV
lV!@h}mG
} $f<Rj/`&
s"]LQM1|
} ;-65~i0Iu
7":0CU%%
SortUtil： 7J2i /m
c=HL 6v<
package org.rut.util.algorithm; ?en%m|}0
<:BhV82l
import org.rut.util.algorithm.support.BubbleSort; Z$5@r2d)
import org.rut.util.algorithm.support.HeapSort; 9Q%Fel.
import org.rut.util.algorithm.support.ImprovedMergeSort; eJ!a8
import org.rut.util.algorithm.support.ImprovedQuickSort; D8Vb@5MW
import org.rut.util.algorithm.support.InsertSort; T|[o
import org.rut.util.algorithm.support.MergeSort; #| Et9
import org.rut.util.algorithm.support.QuickSort; w_i$/`i+
import org.rut.util.algorithm.support.SelectionSort; 6*2z^P9FRj
import org.rut.util.algorithm.support.ShellSort; -xf=dzm)
G%K<YyAP
/** (UTt_ry g
* @author treeroot TNC,{sM
* @since 2006-2-2 "-TIao#
* @version 1.0 Eyu?T
*/ 52#@.Qa
public class SortUtil { s&$Zgf6Z
public final static int INSERT = 1; aOj5b>>
public final static int BUBBLE = 2; X"{s"Mc0G
public final static int SELECTION = 3; U(=cGA.$
public final static int SHELL = 4; -pR1xsG
public final static int QUICK = 5; RyxIJJui
public final static int IMPROVED_QUICK = 6; =X2EF
public final static int MERGE = 7; "U&
public final static int IMPROVED_MERGE = 8; UvOB`Vj
public final static int HEAP = 9; x_\e&"x
@cF aYI
public static void sort(int[] data) { '?k*wEu
sort(data, IMPROVED_QUICK); B9^@]
} Jj'~\j
private static String[] name={ /Et:',D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l+Tw#2s$
}; %zB `Sd<
w]\O3'0Js
private static Sort[] impl=new Sort[]{ |L7 `7!Z
new InsertSort(), (byFr9z
new BubbleSort(), '5eW"HGU]`
new SelectionSort(), vV|u+v{
new ShellSort(), sT3O_20{
new QuickSort(), @Tzh3,F2
new ImprovedQuickSort(), uU>Bun
new MergeSort(), X(#G6KeZFZ
new ImprovedMergeSort(), }o?@
new HeapSort() DP*[t8
}; 8\t~*@"
7@rrAs-"Z
public static String toString(int algorithm){ fN>o465I6
return name[algorithm-1]; j4Cad
} H6*d#!
C sn"sf
public static void sort(int[] data, int algorithm) { i3>7R'q>
impl[algorithm-1].sort(data); qGgT<Rd~1
} Zcv1%hI
O&irgc!
public static interface Sort { %Ow,.+m
public void sort(int[] data); 0=&Hm).
} Ut8yA"Y~
?E2/ CM
public static void swap(int[] data, int i, int j) { '8wA+N6Zr7
int temp = data; m^Btr
data = data[j]; xq.,7#3
data[j] = temp; $}7/mS@c
} -mG3#88*
} <D pi M`