[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; #@G2n@Hj
} )? xg=o/?
int i1=l; 4|qp&%9-
int i2=mid+1; %?seX+ne
for(int cur=l;cur<=r;cur++){ SWt"QqBU
if(i1==mid+1) iBQftq7
data[cur]=temp[i2++]; 4(NI-|q0
else if(i2>r) 2B#\683
data[cur]=temp[i1++]; Wo&i)S<i0F
else if(temp[i1] data[cur]=temp[i1++]; +x`tvo
else 2mRso.Ah
data[cur]=temp[i2++]; <7XdT
} +_<#8v
} r?$\`,;
9iUw7-)
} f' eKX7R
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改进后的归并排序: R9HRbVBJf
_+U`afV
package org.rut.util.algorithm.support; *+G K?Ga
Z7 @#0;g{
import org.rut.util.algorithm.SortUtil; +{s^"M2`
@U}UCG7+
/** |laqy`D
* @author treeroot 2b<0g@~X
* @since 2006-2-2 <rkF2-K,
* @version 1.0 *m;L.r`5[
*/ c;WS !.
public class ImprovedMergeSort implements SortUtil.Sort { :sf;Fq
."2V:;;
private static final int THRESHOLD = 10; `f(!i mN
|1neCP@ng
/* F>&8b^v bn
* (non-Javadoc) te`4*t
* Lczcz"t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NIgt"o[I
*/ bY`k`3v
public void sort(int[] data) { :%0Z
int[] temp=new int[data.length]; i}Y:o}
mergeSort(data,temp,0,data.length-1); 3[c54S+(U
} aW"BN 5eM>
g,.iM8
private void mergeSort(int[] data, int[] temp, int l, int r) { V Bg\)r[
int i, j, k; R_-.:n%.z
int mid = (l + r) / 2; {P*RA'H3G
if (l == r) O)hNHIF
return; 5!wa\)wY
if ((mid - l) >= THRESHOLD) <h^vl-L>
mergeSort(data, temp, l, mid); 9Gy1T3y5"
else GhX>YzD7
insertSort(data, l, mid - l + 1); ETmfy}V8
if ((r - mid) > THRESHOLD) ?O28Q DUI
mergeSort(data, temp, mid + 1, r); |kjk{
else CrK}mbe
insertSort(data, mid + 1, r - mid); 1v`*%95
[z/OY&kF
for (i = l; i <= mid; i++) { se_1wCYz
temp = data; -?j'<g0
} iZ&CE5+
for (j = 1; j <= r - mid; j++) { R@;kYS
temp[r - j + 1] = data[j + mid]; `}18A.K
} d^w6_
int a = temp[l]; DRal{?CH
int b = temp[r]; BeBa4s
for (i = l, j = r, k = l; k <= r; k++) { :X+7}!Wlo
if (a < b) { `Os@/S
data[k] = temp[i++]; "Ln)v
a = temp; oB+drDp8U
} else { [V =O$X_
data[k] = temp[j--]; 6?r}bs6Msx
b = temp[j]; QO~!S_FRH
} L_Z>*s&
} a8NL
} l7\Bq+Q
uq'T:d
/** 67^?v)|
* @param data 9[T}cN=|
* @param l 6,| !zaeS
* @param i T-0fVTeN
*/ |pA3ZWm
private void insertSort(int[] data, int start, int len) { Tw8$6KUW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *{6{ZKM
} 4 1q|R[js!
} #R}sGT
} 4+Wti!s
} "5,'K~hz
c3lU
堆排序： /d*d'3{c
T@Mrbravc
package org.rut.util.algorithm.support; E&9BeU a#
f<?v.5($
import org.rut.util.algorithm.SortUtil; d[=~-[
z&Cz!HrS
/** opc`n}Fc
* @author treeroot ~qT5F)$B-
* @since 2006-2-2 dD ?ZF6
* @version 1.0 +8h!@
*/ OlI|.~
public class HeapSort implements SortUtil.Sort{ B)*?H=f/
b1\.hi
/* (non-Javadoc) >cw%ckE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "n'kv!?\
*/ UU'0WIbY6
public void sort(int[] data) { *MC+i$
MaxHeap h=new MaxHeap(); x4v@o?zW
h.init(data); O/ybqU\7
for(int i=0;i h.remove(); PUcxlD/a}
System.arraycopy(h.queue,1,data,0,data.length); lu vrvm
} S\io5|P
/0CS2mLC
private static class MaxHeap{ 9lqH
Dk%+|c
void init(int[] data){ #|8Ia:=s
this.queue=new int[data.length+1]; 6--t6>5
for(int i=0;i queue[++size]=data; ?&Ug"$v
fixUp(size); _3%eIyk4T
} V$0mcwH
} !:baG]Y
vj%3v4
private int size=0; zCji]:
fQQj2>3w
private int[] queue; \~X:ffb =
^m Ua5w
public int get() { uo9FLm
return queue[1]; 7D&O5Z=%+
} };Pdn7;1G:
L%;fYi;n
public void remove() { P"[\p|[U
SortUtil.swap(queue,1,size--); ij5|P4Eka
fixDown(1); o4U0kiI@
} OMfw#
file://fixdown xciwKIpS
private void fixDown(int k) { UMUG~P&@
int j; 7y4jk
while ((j = k << 1) <= size) { 'D'H)J
if (j < size %26amp;%26amp; queue[j] j++; Z\r?>2
if (queue[k]>queue[j]) file://不用交换 fU<_bg
break; !mH !W5&
SortUtil.swap(queue,j,k); "% l``
k = j; %/oeV;D
} =&Z#QD"vl
} W#&BU-|2
private void fixUp(int k) { s}qtM.^W
while (k > 1) { (<2!^v0.M
int j = k >> 1; )LAG$Cn
if (queue[j]>queue[k]) *b7evU *1
break; `{%ImXQF
SortUtil.swap(queue,j,k); i&KBMx
k = j; o-<XR9,N*
} /Z~5bb(
} ?{L5=X@$$
n"w>Y)C(X)
} bgeJVI
{8 #
} _MWW
3/y"kl:<-
SortUtil： NvvD~Bb
yMEI^,0"
package org.rut.util.algorithm; !t[;~`d9
cJ\1ndBH
import org.rut.util.algorithm.support.BubbleSort; 3N?"s1U
import org.rut.util.algorithm.support.HeapSort; 4C[kj
import org.rut.util.algorithm.support.ImprovedMergeSort; dDA,Ps
import org.rut.util.algorithm.support.ImprovedQuickSort; N6Dv1_c,
import org.rut.util.algorithm.support.InsertSort; z+KZ6h
import org.rut.util.algorithm.support.MergeSort; yU>ucuF
import org.rut.util.algorithm.support.QuickSort; 1HLU &
import org.rut.util.algorithm.support.SelectionSort; Ap~6Vu
import org.rut.util.algorithm.support.ShellSort; @^%YOorr
GX'S4B
/** (coaGQ@d
* @author treeroot Yyw9IYB;
* @since 2006-2-2 <qVOd.9c
* @version 1.0 558!?kx$
*/ ^fV-m&F)K*
public class SortUtil { qOAP_\@T
public final static int INSERT = 1; MP_/eC ;
public final static int BUBBLE = 2; 7pN&fAtj/
public final static int SELECTION = 3; v%kl*K`*
public final static int SHELL = 4; ^U);MH8
public final static int QUICK = 5; =3nA5'UZ
public final static int IMPROVED_QUICK = 6; r)B55;*Fh
public final static int MERGE = 7; ]F"P3':
public final static int IMPROVED_MERGE = 8; ~R\ $Z
public final static int HEAP = 9; 9rIv-&7'm
Q9c*I,Oj
public static void sort(int[] data) { Nxt`5kSx=
sort(data, IMPROVED_QUICK); WHqw=!G
} *to#ZMR;!
private static String[] name={ ltyhYPS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T+PERz(
}; b81cq,
l GJN;G7
private static Sort[] impl=new Sort[]{ Y-,S_59
new InsertSort(), hOYX
new BubbleSort(), |"[;0)dw^
new SelectionSort(), {b-SK5%]L
new ShellSort(), `<#O8,7`
new QuickSort(), )LNKJe+
new ImprovedQuickSort(), efuiFN;
new MergeSort(), *,)1Dcv(
new ImprovedMergeSort(), M,cz7,
new HeapSort() )NTpb
}; C~^T=IP
bN|1%[7
public static String toString(int algorithm){ 7q{yLcC"
return name[algorithm-1]; =>JA; ft
} -0I&dG-
rHqP[[4B'
public static void sort(int[] data, int algorithm) { t0za%q!fK<
impl[algorithm-1].sort(data); rCb$^(w{7
} \tA@A
a/3yn9`sQ
public static interface Sort { hu7oJ H
public void sort(int[] data); BqpJvRJd
} e.Jaq^Gw|
Iu(]i?Y
public static void swap(int[] data, int i, int j) { %$bhg&}
int temp = data; =$T[
data = data[j]; n]nJ$u1u
data[j] = temp; -=n!k^?lK
} Fu% n8
} -S&d5(R