[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; NJQy*~P
} 2zX9c<S=5
int i1=l; =&FaMR2
int i2=mid+1; jL'R4z
for(int cur=l;cur<=r;cur++){ lWP]}Uy=5~
if(i1==mid+1) [O]rf+NZ(5
data[cur]=temp[i2++]; #v6<9>%
else if(i2>r) n(SeJk%>9
data[cur]=temp[i1++]; m6gMVon
else if(temp[i1] data[cur]=temp[i1++]; r{Mn{1:O
else ?papk4w
data[cur]=temp[i2++]; w2lO[o~x}
} l2Rnyb<;;
} it-2]Nw
E!L_"GW
} J5xZLv
T~g`;Q%i
改进后的归并排序: -"#jRP]#
_U^G*EqL*
package org.rut.util.algorithm.support; s |o(~2j
%;aB#:p6
import org.rut.util.algorithm.SortUtil; kcMg`pJ4<
z"FxKN~Z
/** %<U0
* @author treeroot L2%D$!9
* @since 2006-2-2 Kt/:caD
* @version 1.0 RfT)dS+rAh
*/ y,qn9
public class ImprovedMergeSort implements SortUtil.Sort { LIyb+rH#yg
Lnq CHe
private static final int THRESHOLD = 10; )FfS7 C\.
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/* M<Dvhy[
* (non-Javadoc) N]\)Ok
* r!|h3*YA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ip *8R]W
*/ Ev3,p`zS._
public void sort(int[] data) { 38:5g_
int[] temp=new int[data.length]; {7_C|z:'p&
mergeSort(data,temp,0,data.length-1); &78lep
} -uhVw_qq#
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private void mergeSort(int[] data, int[] temp, int l, int r) { bPV;"
int i, j, k; -q&,7'V
int mid = (l + r) / 2; s E;2;2u"
if (l == r) ]AN%#1++U
return; wb##|XyK<c
if ((mid - l) >= THRESHOLD) nAX/u[
mergeSort(data, temp, l, mid); GBT219Z@8
else Wy /5Qw~s
insertSort(data, l, mid - l + 1); (io[O?te
if ((r - mid) > THRESHOLD) 10N0?K"
mergeSort(data, temp, mid + 1, r); O&VA79\UO
else ;w._/
insertSort(data, mid + 1, r - mid); "}oo`+]Cq
UoSc<h|
for (i = l; i <= mid; i++) { 8~|v:qk
temp = data; VAe[x `
} N0 mhgEA
for (j = 1; j <= r - mid; j++) { <KI>:@|Sc
temp[r - j + 1] = data[j + mid]; :EH>&vm
} us.IdG
int a = temp[l]; :X}Ie P
int b = temp[r]; bwJluJ,E
for (i = l, j = r, k = l; k <= r; k++) { k$kxw_N5d
if (a < b) { 5Z=GFKf|
data[k] = temp[i++]; Il#ST
a = temp; _c(h{dn
} else { ]c]^(C
data[k] = temp[j--]; 3/]~#y%2
b = temp[j]; _p^Wc.[~M
} _!w69>Nj
} J.O{+{&cd
} 9`KFJx6D
NH*"AE;
/** {Eqx'j
* @param data j'lC]}kH
* @param l Tz0XBH_
* @param i _3#_6>=M
*/ Fr2F&NN`D
private void insertSort(int[] data, int start, int len) { BaMF5f+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yf4 i!~
} .LbAR u
} a :cfr*IsK
} }VHvC"
} A.RG8"
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堆排序： CdtCxy5
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package org.rut.util.algorithm.support; *)vy%\
~ftR:F|9
import org.rut.util.algorithm.SortUtil; 'QTa<Z)E
$if(n||
/** KTeR;6oZn"
* @author treeroot EiyHZ
* @since 2006-2-2 {s6hi#R>
* @version 1.0 bw!*=<
*/ _x$\E
public class HeapSort implements SortUtil.Sort{ Gh<#wa['}
}1Q>A 5e
/* (non-Javadoc) K@{R?j/+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !P":z0K4
*/ =)x+f/c]
public void sort(int[] data) { st>%U9
MaxHeap h=new MaxHeap(); ~D`
h.init(data); RVF<l?EI4R
for(int i=0;i h.remove(); ^S)t;t@x
System.arraycopy(h.queue,1,data,0,data.length); 0C6T>E7
} %/SHB
Owv}lJ
private static class MaxHeap{ E 0@u|
phwBil-vUU
void init(int[] data){ j%':M
this.queue=new int[data.length+1]; A+z}z@K
for(int i=0;i queue[++size]=data; 1KjzKFnb
fixUp(size); c_aj-`BKp
} R~;8v1>K
} NS "1zR+
.k%/JF91n
private int size=0; Q<yvpT(
e488}h6#m
private int[] queue; i8#:y`ai
]H<}6}Gd
public int get() { v|@EuN14<
return queue[1]; 3ik~PgGoKQ
} w BoP&l
&gI*[5v
public void remove() { k4` %.;
SortUtil.swap(queue,1,size--); *|gl1S
fixDown(1); fVi[mH0=+
} =p dLh
file://fixdown |\)Y,~;P
private void fixDown(int k) { S$a.8Xh
int j; 4~hP25q
while ((j = k << 1) <= size) { shiw;.vR{B
if (j < size %26amp;%26amp; queue[j] j++; 7Q~$&G
if (queue[k]>queue[j]) file://不用交换 =>O{hT^F
break; G\(*z4@Gz
SortUtil.swap(queue,j,k); MFipXE!
k = j; eu//Q'W
} g+xcKfN{
} w,X J8+B
private void fixUp(int k) { om6`>I*
while (k > 1) { !P6?nS
int j = k >> 1; >xXq:4l>}
if (queue[j]>queue[k]) Ym$`EN
break; !yz3:Yzu
SortUtil.swap(queue,j,k); kc2 8Q2
k = j; 2/x~w~3U
} EEvi_Z932
} Ij9=J1c4
fr8';Jm
} #(Yd'qKo
xX8c>p
} 8L`wib2
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SortUtil： yz)Nco]
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package org.rut.util.algorithm; Hdjp^O!
upq3)t_
import org.rut.util.algorithm.support.BubbleSort; f+Fzpd?wS
import org.rut.util.algorithm.support.HeapSort; C\ 34R
import org.rut.util.algorithm.support.ImprovedMergeSort; 8/~@3-9EK
import org.rut.util.algorithm.support.ImprovedQuickSort; -:Q"aeC5
import org.rut.util.algorithm.support.InsertSort; dx.Jv/Mb
import org.rut.util.algorithm.support.MergeSort; BM87f:d
import org.rut.util.algorithm.support.QuickSort; D<[kbt5^7
import org.rut.util.algorithm.support.SelectionSort; .4y44: T
import org.rut.util.algorithm.support.ShellSort; X& XD2o"rt
P|a|4Bb+fW
/** hl8oE5MU
* @author treeroot ]=Wq&~
* @since 2006-2-2 ?` 2z8uD/
* @version 1.0 G420o}q
*/ V)ITk\
public class SortUtil { |w>d]eA5
public final static int INSERT = 1; &7eN EA
public final static int BUBBLE = 2; cxIAI=JK
public final static int SELECTION = 3; HYNpvK
public final static int SHELL = 4; ^Jc|d,u;s
public final static int QUICK = 5; ( ;KTV*1
public final static int IMPROVED_QUICK = 6; t*-_MG
public final static int MERGE = 7; O`;o"\P<
public final static int IMPROVED_MERGE = 8; ,X\qlT5C
public final static int HEAP = 9; o%$R`;
|"}rC >+
public static void sort(int[] data) { _iu^VK,}
sort(data, IMPROVED_QUICK); `b_n\pf]
} _A=i2?g
private static String[] name={ ]'z 5%'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :S+Bu*OyH
}; d\tA1&k71
c7R6.T
private static Sort[] impl=new Sort[]{ Zy>y7O(,
new InsertSort(), PE6ZzxR|U<
new BubbleSort(), u>V~:q\X
new SelectionSort(), Bey9P)_Of
new ShellSort(), F*y7 4j,
new QuickSort(), cq$_$jRx
new ImprovedQuickSort(), ~;oaW<"
new MergeSort(), fhro"5/4
new ImprovedMergeSort(), T t$] [
new HeapSort() zOis}$GR
}; mD,fxm{G
B06W(y,3Q>
public static String toString(int algorithm){ I8\R7s3
return name[algorithm-1]; ~vMJ?P@
} RVr5^l;"
=V:Al
public static void sort(int[] data, int algorithm) { t1!>EI`
impl[algorithm-1].sort(data); 5W09>C>OC
} -s7a\H{~
4@Bl 1b[<
public static interface Sort { W O'nW
public void sort(int[] data); 0 .ck!"h}
} z:A_
HzAw rC
public static void swap(int[] data, int i, int j) { iz27yXHZ~
int temp = data; ^a7a_M
data = data[j]; O*>`md?MH
data[j] = temp; Dt'bbX'edw
} d}@n,3
} [*r=u[67F