[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; g0j4<\F2\
} loUwRz
int i1=l; ` G=L07
int i2=mid+1; )H9*NB8%
for(int cur=l;cur<=r;cur++){ (oitCIV
if(i1==mid+1) G>,nZ/,A{
data[cur]=temp[i2++]; %lJiM`a
else if(i2>r) 6 2`PK+
data[cur]=temp[i1++]; NWHH.1|
else if(temp[i1] data[cur]=temp[i1++]; Q|B|#?E==
else tOg 8L2
data[cur]=temp[i2++]; [A9,!YY
} [Z#.]gb
} Qf-k&d
9G&l qfX:
} y3nm!tjyM
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改进后的归并排序: O)xEF~DaD
6IY}SI0N
package org.rut.util.algorithm.support; 6L2*gO:r?
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import org.rut.util.algorithm.SortUtil; !)/iRw9re
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/** oT)VOkFq
* @author treeroot [du>ff
* @since 2006-2-2 '<D`:srV
* @version 1.0 B~;LBgpp
*/ `Kc %S^C'
public class ImprovedMergeSort implements SortUtil.Sort { [Ht."VxR
FPMSaN P
private static final int THRESHOLD = 10; 2Z`$
Uaj`
/* 2]NAs9aZ
* (non-Javadoc) gLaO#cQ%
* =3sldKL&F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HCjn9
*/ :@>br+S
public void sort(int[] data) { Dd# SUQ
int[] temp=new int[data.length]; JXY!c\,
mergeSort(data,temp,0,data.length-1); `H2F0{\og
} CoUd16*"JM
wEfz2Eq
private void mergeSort(int[] data, int[] temp, int l, int r) { ]v@tZ}
int i, j, k; Iwt2}E(e
int mid = (l + r) / 2; R'9@A\7#
if (l == r) IN|i)?rh
return; ,-7/]h,l
if ((mid - l) >= THRESHOLD) OHP3T(Q5
mergeSort(data, temp, l, mid); {|5$1v
else aC,vh1")F
insertSort(data, l, mid - l + 1); 0"kE^=
if ((r - mid) > THRESHOLD) QK?2E
mergeSort(data, temp, mid + 1, r); ?St=7a(D
else )qyx|D
insertSort(data, mid + 1, r - mid); ~f=6?5.wa
dx13vZ3[U
for (i = l; i <= mid; i++) { XW~ BEa
temp = data; tT* W5
} YZBzv2'\x
for (j = 1; j <= r - mid; j++) { qsft*&
temp[r - j + 1] = data[j + mid]; ^EUOmVN
} HhWwc#B
int a = temp[l]; bL'#
int b = temp[r]; 4VmCW"b7h
for (i = l, j = r, k = l; k <= r; k++) { O&3r*vd
if (a < b) { A)RI:?+
data[k] = temp[i++]; 6t_ 3%{
a = temp; DYAwQ"i;6
} else { Pv7f _hw
data[k] = temp[j--]; -yl4tW
b = temp[j]; KO-Zz&2f
} z[5Y Z~}*
} [/AdeR
} k,;lyE
Pu$kj"|q*[
/** *CH!<VB/
* @param data qP;{3FSkAF
* @param l )l!J$X+R
* @param i h{W$ fZc<
*/ Y|m_qB^_
private void insertSort(int[] data, int start, int len) { qD(fYOX{C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d^Zo35X
} >?>ubM`,
} +Q SxYV
} uv|eVT3jNs
} "$~}'`(]
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堆排序： ^I(oy.6?=p
3yHb!}F
package org.rut.util.algorithm.support; ;z.6'EYMG
yfM>8"h@
import org.rut.util.algorithm.SortUtil; `'xQ6Sy
B?$01?9V
/** yD3bl%uZ
* @author treeroot ,30FGz^i
* @since 2006-2-2 #.E\,N'
* @version 1.0 M.xhVgFf)
*/ Hi; K"H]x1
public class HeapSort implements SortUtil.Sort{ OX)#F'Sl}
N+\oFbE
/* (non-Javadoc) er["NSo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u[V4OU}%
*/ fqcU5l[v,
public void sort(int[] data) { !paN`Fz\a
MaxHeap h=new MaxHeap(); _=|nOj39
h.init(data); _l24Ba$F6
for(int i=0;i h.remove(); }g>dn
System.arraycopy(h.queue,1,data,0,data.length); HF&h
} KjFZ
ig{A[7qN
private static class MaxHeap{ iUeV5cB
qs6Nb'JvQR
void init(int[] data){ 935-{h@k
this.queue=new int[data.length+1]; bGZhUEq
for(int i=0;i queue[++size]=data; C1X}3bB
fixUp(size); d98))G~W
} r/mA2
} a&$Zpf!!
=@xN(](
private int size=0; J 6(~>g
l5FuMk-
private int[] queue; K-2.E
BW'L.*2
public int get() { iEiu%T>
return queue[1]; W<\kf4Y
} r+t ,J|V
|rr$U
public void remove() { snXB`UC
SortUtil.swap(queue,1,size--); 5z1\#" B[
fixDown(1); ~A8qeaP
} D ?Nd;[
file://fixdown - *:p.(c
private void fixDown(int k) { 5~@?>)TBv
int j; %/UV_@x&
while ((j = k << 1) <= size) { EX[B/YH
if (j < size %26amp;%26amp; queue[j] j++; 4=u+ozCG
if (queue[k]>queue[j]) file://不用交换 N@k3$+ls
break; d>lt
SortUtil.swap(queue,j,k); #d7N| 9_
k = j; !OPSSP]-
} ,9=gVW{
} >%9^%p^
private void fixUp(int k) { J?._/RL8-
while (k > 1) { qq OxTG]
int j = k >> 1; fA"<MslKLK
if (queue[j]>queue[k]) -h>Z,-DE6
break; r0)JUc}Fyq
SortUtil.swap(queue,j,k); 8 ne/=N|,
k = j; Yuwc$Qp)
} 7#~4{rjg
} |w=Ec#)t4
S-isL4D.Z
} gzVtxDh
S4L-/<s[*
} DW1@<X
<(fdHQD!7>
SortUtil： Xl#Dw bx
Wu4ot0SZ
package org.rut.util.algorithm; 25aNC;J
JDkCUN5
import org.rut.util.algorithm.support.BubbleSort; :~vxZ*a
import org.rut.util.algorithm.support.HeapSort; 3Bejp+xX
import org.rut.util.algorithm.support.ImprovedMergeSort; A/!<kp{S
import org.rut.util.algorithm.support.ImprovedQuickSort; ci`zR9Ks
import org.rut.util.algorithm.support.InsertSort; ~ct2`M$TL(
import org.rut.util.algorithm.support.MergeSort; +C'XS{K,#
import org.rut.util.algorithm.support.QuickSort; t2"@Ps&1|
import org.rut.util.algorithm.support.SelectionSort; T36x=LX
import org.rut.util.algorithm.support.ShellSort; 8QT<M]N%
St6aYK
/** C`dkD0_
* @author treeroot gXLCRn!iR
* @since 2006-2-2 @zo7.'7P
* @version 1.0 G;/Q>V
*/ YnSbw3U.I
public class SortUtil { 5QAdcEcN@O
public final static int INSERT = 1; 0Y7$d`
public final static int BUBBLE = 2; B1E$v(P3M
public final static int SELECTION = 3; +fM&su=wl
public final static int SHELL = 4; S"zk!2@C
public final static int QUICK = 5; x5oOF7#5
public final static int IMPROVED_QUICK = 6; E(_KN[}S
public final static int MERGE = 7; K]X`sH:
public final static int IMPROVED_MERGE = 8; yk<VlS
public final static int HEAP = 9; ^pj>9%
G%S6$@:
public static void sort(int[] data) { /?Vdqci
sort(data, IMPROVED_QUICK); _l<mu?"
} cg,Ua!c
private static String[] name={ @@Q6TB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [q1Unm
}; |8bE9qt.P
e8oKn&
private static Sort[] impl=new Sort[]{ fe|g3>/|
new InsertSort(), flP>@i:e6
new BubbleSort(), zDB"r
new SelectionSort(), dXl]Pe|v
new ShellSort(), |k6Ox*
new QuickSort(), Axlm<3<wf"
new ImprovedQuickSort(), IK'F{QPH
new MergeSort(), b vRB
new ImprovedMergeSort(), gY!N3 *:
new HeapSort() L=RGL+f1_
}; wFvT0
Cc!J1)
public static String toString(int algorithm){ s O=4IBE
return name[algorithm-1]; HMV)U{
} :N2E}hxk
P[FV2R~
public static void sort(int[] data, int algorithm) { jJia.#.Ze
impl[algorithm-1].sort(data); Yrxk Kw#
} LKx`v90p
b,Ke>.m
public static interface Sort { Nt~x&s
public void sort(int[] data); MGQ,\55"
} +< yhcSSTB
Wwhgo.Wx
public static void swap(int[] data, int i, int j) { G6V/SaD
int temp = data; :m Kxa
data = data[j]; Me,<\rQ
data[j] = temp; !MoOKW
} Yl~$V(
} "]#'QuR