[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; K|sx"u|?
} ^Z:qlYZ
int i1=l; tF~D!t@
int i2=mid+1; o_on/{qz
for(int cur=l;cur<=r;cur++){ {_>}K
if(i1==mid+1) n_MY69W
data[cur]=temp[i2++]; 9*j$U$:'
else if(i2>r) GGkU$qp2~
data[cur]=temp[i1++]; i>=!6Hu2
else if(temp[i1] data[cur]=temp[i1++]; NT<vs"<B
else DjveMs$d
data[cur]=temp[i2++]; z3Q#Wmv2
} @1O.;
} xPorlX)zW
f|'8~C5I@>
} @0U={qX
.u$o^; z!
改进后的归并排序: F4 :#okt
FR? \H"'x
package org.rut.util.algorithm.support; 2H2Yxe7?-
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import org.rut.util.algorithm.SortUtil; [vyi_0[
_/@u[dWeL
/** 5 p! rZ
* @author treeroot \ 3HB
* @since 2006-2-2 zpBkP-%}E
* @version 1.0 ;A;FR3=)
*/ "vN~7%
public class ImprovedMergeSort implements SortUtil.Sort { hYEUiQ
.GOF0puiM
private static final int THRESHOLD = 10; Z<@dM2b)
/{*0 \`;
/* Eao^/MKx-
* (non-Javadoc) 9 Aq\1QC
* !OL[1_-4|K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1CpIK$/
*/ "=3bL>\<
public void sort(int[] data) { %Ae43
int[] temp=new int[data.length]; :|PgGhW
mergeSort(data,temp,0,data.length-1); "6 \_/l
} z"j]m_mH
k;xIo(:
private void mergeSort(int[] data, int[] temp, int l, int r) { x{#W84
int i, j, k; k{-#2Qz
int mid = (l + r) / 2; iFkXt<_A
if (l == r) _2E*
return; s\3OqJo%)
if ((mid - l) >= THRESHOLD) fsz:A"0H
mergeSort(data, temp, l, mid); 9@yi UX
else Y;[+^J*a
insertSort(data, l, mid - l + 1); vvmG46IgZ
if ((r - mid) > THRESHOLD) 6Us*zKgW
mergeSort(data, temp, mid + 1, r); U3b&/z|b?
else }?^5L7n
insertSort(data, mid + 1, r - mid); +X|^ ~)tMJ
"DsL$D2e
for (i = l; i <= mid; i++) { w-wap
temp = data; /7jb&f
} m%)Cw)t 7
for (j = 1; j <= r - mid; j++) { wC`+^>WFo
temp[r - j + 1] = data[j + mid]; m)Sdogt_
} '4]_~?&x
int a = temp[l]; F0]xc
int b = temp[r]; LMTz/M
for (i = l, j = r, k = l; k <= r; k++) { uwo\FI
if (a < b) { d_aHUmI^"
data[k] = temp[i++]; $s"{C"4q
a = temp; W2T6JFv
} else { =--oH'P=M
data[k] = temp[j--]; 5}NTqN0@
b = temp[j]; bTbF
} x_$`#m{hL5
} Zj5B}[,l\
} Ge+T[
ibn(eu<uW
/** ()o[(Hx+ph
* @param data z6x`O-\
* @param l gOLN7K-)
* @param i jU0E=;1
*/ Q7@oAeNd
private void insertSort(int[] data, int start, int len) { fF]w[lLDv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jN T+?2
} GiS:Nq`$(
} DuI>z?bS
} /wT<p
} J1g+H2
g#b9xTGJ^
堆排序： r2G38/K
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package org.rut.util.algorithm.support; #bwGDF
#$ooV1E
import org.rut.util.algorithm.SortUtil; gnN"6r1
rBUWzpE"
/** z=yE- I{
* @author treeroot i)th] 1K%
* @since 2006-2-2 E_-QGE/1
* @version 1.0 FW)VyVFmk
*/ OAo;vC:^
public class HeapSort implements SortUtil.Sort{ ;DXg
Pmdf:?B
/* (non-Javadoc) Q:U>nm>xA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hI 1or4V
*/ \dJOZ2J<z
public void sort(int[] data) { Y1R?,5
MaxHeap h=new MaxHeap(); Yan}H}Oq
h.init(data); Fxv5kho
for(int i=0;i h.remove(); W[<ZI>mf
System.arraycopy(h.queue,1,data,0,data.length); 3nnoXc'
} s`gfz}/
<rxtdI"3
private static class MaxHeap{ (z 9M
)f,9 h
void init(int[] data){ m^gxEPJK
this.queue=new int[data.length+1]; #7['M;_
for(int i=0;i queue[++size]=data; `!Yd$=*c_&
fixUp(size); C`qE ,2.
} ,Q<mU4
} ~'v9/I-"
7j8lhrM}^
private int size=0; Gj^*
lc\{47LwZ
private int[] queue; aM+Am,n`@
B *%ey?
public int get() { 0Ua&_D"
return queue[1]; PUmgcMt
} FxmHy{JG
V{UY_ e8W
public void remove() { x;{Hd;<YF
SortUtil.swap(queue,1,size--); K5!OvqzG
fixDown(1); }#h`1 uV
} #Q'#/\5
file://fixdown `j8pgnY>5~
private void fixDown(int k) { Cy dV$!&mP
int j; +w/B3b
while ((j = k << 1) <= size) { b/?)_pg
if (j < size %26amp;%26amp; queue[j] j++; XK&G`cJ[
if (queue[k]>queue[j]) file://不用交换 -2'1KAk-W
break; q_cP<2`@V
SortUtil.swap(queue,j,k); 1my1m
k = j; 8SA" bH:
} +o?;7
} //'&a-%$^
private void fixUp(int k) { +xd@un[r<
while (k > 1) { 'xLXj>
int j = k >> 1; RsYMw3)G
if (queue[j]>queue[k]) S)?N6sz%
break; E0AbVa.
SortUtil.swap(queue,j,k); vXm'ARj
k = j; \/64Xv3L0
} td7Of(k'
} &0i$Y\g
Fw:_O2
} e07u@_'^
>gDeuye
} WLA&K]
q@g#DP+C
SortUtil： Dt! <
;;6$d{
package org.rut.util.algorithm; +NbiUCMX
3N5@<:2`
import org.rut.util.algorithm.support.BubbleSort; P=PeWX*L<Z
import org.rut.util.algorithm.support.HeapSort; v*OV\h.
import org.rut.util.algorithm.support.ImprovedMergeSort; %o5'M^U
import org.rut.util.algorithm.support.ImprovedQuickSort; iI>7I<_
import org.rut.util.algorithm.support.InsertSort; =3ovaP
import org.rut.util.algorithm.support.MergeSort; 9khMG$
import org.rut.util.algorithm.support.QuickSort; D5!#c-Y-
import org.rut.util.algorithm.support.SelectionSort; 1_};!5$.
import org.rut.util.algorithm.support.ShellSort; 1tLEKSo+
--EDr>'D5P
/** S+"Bq:u"
* @author treeroot TOhWfl;
* @since 2006-2-2 Gu@C*.jj!
* @version 1.0 E*h!{)z@F
*/ N\];{pe>
public class SortUtil { AOJ[/YpM
public final static int INSERT = 1; !C h1q
public final static int BUBBLE = 2; ,Js-'vX
public final static int SELECTION = 3; % m"Qg<
public final static int SHELL = 4; ,,!P-kK$
public final static int QUICK = 5; +u&[ j/
public final static int IMPROVED_QUICK = 6; F-$!e?,H
public final static int MERGE = 7; 9)t[YE:U3!
public final static int IMPROVED_MERGE = 8; @]]&^ 7
public final static int HEAP = 9; 9g\;L:'
TyjZ
public static void sort(int[] data) { plp-[eKcD
sort(data, IMPROVED_QUICK); F{.\i*$
} mz+UkA'
private static String[] name={ fs?H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )ki Gk}2
}; ^`B;SSV
=H3tkMoi2
private static Sort[] impl=new Sort[]{ Oi zj|'
new InsertSort(), z1]nC]2
new BubbleSort(), ;rF[y7\
new SelectionSort(), r<4j;"lQK
new ShellSort(), Oet+$ b
new QuickSort(), ,<Z,-0S
new ImprovedQuickSort(), \7%#4@;?
new MergeSort(), wZN_YFwQ
new ImprovedMergeSort(), nzaA_^`mB
new HeapSort() \A,zwdt P
}; 8\^A;5
!^ad{#|X
public static String toString(int algorithm){ 7BL)FJ]UR]
return name[algorithm-1]; TQmrL
} }i,r{Y]s]
.6T0d 4,1
public static void sort(int[] data, int algorithm) { %<x!mE x
impl[algorithm-1].sort(data); %1$#fxR
} P%H Dz
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public static interface Sort { ca,W:9#.xn
public void sort(int[] data); IRwtM'%0
} JSi0-S[Y{
k_!e5c
public static void swap(int[] data, int i, int j) { fIl!{pv[
int temp = data; ]ly" K!1,
data = data[j]; GGhk~H4OP
data[j] = temp; i#hFpZ6u
} ~!!\#IX
} dJ m9''T')