[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; e~U]yg5X-
} K2> CR$L
int i1=l; OAauD$Hh
int i2=mid+1; !sG#3sUe[
for(int cur=l;cur<=r;cur++){ (hJ&`Tt
if(i1==mid+1) dM=45$\q
data[cur]=temp[i2++]; hGy[L3{
else if(i2>r) 1.tAl6]
data[cur]=temp[i1++]; vvI23!H
else if(temp[i1] data[cur]=temp[i1++]; 2Onp{,'}
else :o 8XG
data[cur]=temp[i2++]; S54q?sb_
} Lc#GBaJ
} Xwo%DZKN
;=p3L<~c`K
} ![i)_XO
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改进后的归并排序: vh#81}@N7*
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package org.rut.util.algorithm.support; :pfLa2f+
?KtF!:_C
import org.rut.util.algorithm.SortUtil; =(]Z%Q-V
&,l(2z[
/** 8c\\-{
* @author treeroot l0 8vF$k|d
* @since 2006-2-2 02_+{vk!
* @version 1.0 mCyn:+
*/ D3B]
public class ImprovedMergeSort implements SortUtil.Sort { J= [D'h
yAiO._U
private static final int THRESHOLD = 10; j'k <
jsFfrS"*
/* lvsj4cT
* (non-Javadoc) !-t,r%CG
* Vw|P;LLl`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M#_|WL~
*/ F8S>Ld
public void sort(int[] data) { \%|Xf[AX
int[] temp=new int[data.length]; PjD9D.
mergeSort(data,temp,0,data.length-1); i\,I)S%yJ
} p|C[T]J\@
*`q?`#1&&.
private void mergeSort(int[] data, int[] temp, int l, int r) { l*?_@
int i, j, k; Z]e`bfNnI
int mid = (l + r) / 2; +Bf?35LP
if (l == r) s&hr$`V4
return; lA pZC6Iwk
if ((mid - l) >= THRESHOLD) P8(hHuO
mergeSort(data, temp, l, mid); ^Z-oO#)h#
else uzI=.j
insertSort(data, l, mid - l + 1); u"uL,w 1-
if ((r - mid) > THRESHOLD) 35Yf,@VO
mergeSort(data, temp, mid + 1, r); nwp(% fBo
else o_1N "o%
insertSort(data, mid + 1, r - mid); kO5lLqE
cNbUr
for (i = l; i <= mid; i++) { a%A!DzS
temp = data; GsmXcBzDw2
} OXm`n/64+
for (j = 1; j <= r - mid; j++) { Z}TLk^_[
temp[r - j + 1] = data[j + mid]; RG*Vdom
} $AT@r"
int a = temp[l]; o]Xt2E
int b = temp[r]; `BQv;NtP
for (i = l, j = r, k = l; k <= r; k++) { Z\$M)e8n
if (a < b) { 9O-2
data[k] = temp[i++]; lm6hFvEZ
a = temp; &JXb) W
} else { ME$J42
data[k] = temp[j--]; iy8Jl
b = temp[j]; 0,nz*UDk
} -V:HT j
} ,3!$mQL=
} *E*oWb]H
z&WtPSyGj
/** 2E?!Q I\O
* @param data [}YUi>NGA
* @param l Q6W![571;
* @param i i!zFW-*5
*/ ei<0,w[V1{
private void insertSort(int[] data, int start, int len) { 0$]iRE;O]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2j:0!%
} 1X[^^p~^
} d=n@#|3
} Kv(R|d6Lp
} }DXG;L
=gs-#\%
堆排序： (-g*U#
1$8@CT^m
package org.rut.util.algorithm.support; Z2gWa~dBC
{nbT$3=Zt
import org.rut.util.algorithm.SortUtil; <)p.GAZ
Lo~;pvv
/** 1_<x%>zG
* @author treeroot [lg!*
* @since 2006-2-2 vjq2(I)u
* @version 1.0 )Xh}N
*/ o]~\u{o#.
public class HeapSort implements SortUtil.Sort{ d)emTXB(
=KUmvV*\
/* (non-Javadoc) .G8>UXX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HT6 [Z1
*/ #n'.a1R
public void sort(int[] data) { v&|65[<
MaxHeap h=new MaxHeap(); `Bw]PO
h.init(data); c7jmzo
for(int i=0;i h.remove(); >;^/B R=
System.arraycopy(h.queue,1,data,0,data.length); (Kwqa"Hk4{
} P&uSh?[ ^
)-26(aNGT
private static class MaxHeap{ 7IkPi?&{
2}A)5P*K
void init(int[] data){ HMCLJ/
this.queue=new int[data.length+1]; W|7|XO
for(int i=0;i queue[++size]=data; \c -m\|
fixUp(size); HiA E9
} `^Vd*
} w.-x2Zg},
W48RZghmx
private int size=0; RkE)2q[5
Ln4]uqMG.
private int[] queue; @QQ%09*
)A$"COM4
public int get() { DxV=S0P
return queue[1]; ${MzOi
} x-m*p^}
T@tsM|pI
public void remove() { ' @RF
SortUtil.swap(queue,1,size--); >`\.i,X.D
fixDown(1); zak\%yY`
} yf:Vhr
file://fixdown /[<F f
private void fixDown(int k) { 2ZY$/
int j; ^Hv&{r77
while ((j = k << 1) <= size) { px<psR5
if (j < size %26amp;%26amp; queue[j] j++; Lw}-oE !U
if (queue[k]>queue[j]) file://不用交换 T82 `-bZ
break; :QGkYJ
SortUtil.swap(queue,j,k); $<v4c5r]O
k = j; dS ojq6M
} 2%sZaM
} (dq_,LI
private void fixUp(int k) { =/Gd<qz3
while (k > 1) { AH#mL
int j = k >> 1; %):_
if (queue[j]>queue[k]) cuN9RG
break; Z*m^K%qJ
SortUtil.swap(queue,j,k); i%-yR DIX
k = j; Q>,&@
} z2iMpZ
} (oGYnN,2
}PBme'kP
} ENZym
c!ZZMCs
} k( :Bl
6G2~'zqPc~
SortUtil： <D/K[mz-
>qo!#vJc a
package org.rut.util.algorithm; f~NS{gL*
J8emz8J
import org.rut.util.algorithm.support.BubbleSort; N1Vj;-
import org.rut.util.algorithm.support.HeapSort; A0<g8pv
import org.rut.util.algorithm.support.ImprovedMergeSort; $@L;j
import org.rut.util.algorithm.support.ImprovedQuickSort; e,JBz~CK*w
import org.rut.util.algorithm.support.InsertSort; l+9RPJD/:
import org.rut.util.algorithm.support.MergeSort; H?=W]<!W{y
import org.rut.util.algorithm.support.QuickSort; ZaYiby@Ci
import org.rut.util.algorithm.support.SelectionSort; 1 pVw,}
import org.rut.util.algorithm.support.ShellSort; &<N8d(
KnkmGy
/** ^Kz?SO
* @author treeroot I?'*vAW<
* @since 2006-2-2 h9QM nH'
* @version 1.0 G}8tFo.d1
*/ I _KHQ&Z*
public class SortUtil { 1m~|e.g_'`
public final static int INSERT = 1; gy}3ZA*F
public final static int BUBBLE = 2; 46=E- Tq
public final static int SELECTION = 3; rWTaCU^qV
public final static int SHELL = 4; \p(S4?I7
public final static int QUICK = 5; !, BJO3&
public final static int IMPROVED_QUICK = 6; d_25]B(
public final static int MERGE = 7; nnyT,e%
public final static int IMPROVED_MERGE = 8; v#?DWeaFS_
public final static int HEAP = 9; cg8/v:B
M2Nh3ijr
public static void sort(int[] data) { 4;6"I2;zfG
sort(data, IMPROVED_QUICK); =3035{\
} Fqeqn[,
private static String[] name={ }k VC]+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }dN\bb{#
}; tx5bmF;b)
".>#Qp%
private static Sort[] impl=new Sort[]{ BQ6$T&
new InsertSort(), p6- //0qb
new BubbleSort(), gX{j$]^6G8
new SelectionSort(), Q#%LIkeq
new ShellSort(), ! v![K
new QuickSort(), b$'%)\('g
new ImprovedQuickSort(), 5;XC!Gz
new MergeSort(), %$&eC
new ImprovedMergeSort(), !f/K:CK|
new HeapSort() vc: kY
}; eQ'E`S_d
u.2X"
public static String toString(int algorithm){ k{f1q>gd
return name[algorithm-1]; f!+d*9
} -U2Su|:\N8
l-XfUjJ
public static void sort(int[] data, int algorithm) { gveGBi
impl[algorithm-1].sort(data); (')t>B1Z
} ;j T{< Y
%72# tY
public static interface Sort { (Iv@SiZf(
public void sort(int[] data); ~aotV1"D
} #X)DFAtb
9BakxmAc
public static void swap(int[] data, int i, int j) { ,O:4[M!$w
int temp = data; ()|e xWW
data = data[j]; aUMiRm-
data[j] = temp; cUug}/!I
} @>z.chM;
} F[coa5