[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; x[dR5
} +k<0:Fi
int i1=l; Zai:?%^
int i2=mid+1; Gp.XTz#=
for(int cur=l;cur<=r;cur++){ G<_<j}=
if(i1==mid+1) Q&k1' nT5
data[cur]=temp[i2++]; -L6YLe%w
else if(i2>r) N0POyd/rL
data[cur]=temp[i1++]; &9ZrZ"]
else if(temp[i1] data[cur]=temp[i1++]; y~'h/tjM@=
else U{[ g"_+~
data[cur]=temp[i2++]; ^OZ*Le
} E8LZ% N#
} >bUxb-8
l =X6m(
} z,+LPr
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改进后的归并排序: 921m'WE
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package org.rut.util.algorithm.support; O+w82!<:
5 >c,#*
import org.rut.util.algorithm.SortUtil; W3M1> (
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/** a@v}j&
* @author treeroot O>tz;RU
* @since 2006-2-2 DN0`vl{*
* @version 1.0 \|f3\4;!
*/ ,l )7]p*X
public class ImprovedMergeSort implements SortUtil.Sort { (l_/ HQ32
[zsUboCkc
private static final int THRESHOLD = 10; Tfow_t}\
Pz77\DpFi
/* ~\]lMsk+
* (non-Javadoc) ;RUod .x
* EU,f;H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e{6I-5`|,#
*/ 0n)99Osq(u
public void sort(int[] data) { vjz 'y[D
int[] temp=new int[data.length]; AL{r/h
mergeSort(data,temp,0,data.length-1); hVe39BBtO
} g=)OcTd#
$9@jV<Q1
private void mergeSort(int[] data, int[] temp, int l, int r) { ]; Z[V
int i, j, k; U'oFW@Y;h
int mid = (l + r) / 2; UfxYD
if (l == r) !+H)N
return; >X58 zlxk
if ((mid - l) >= THRESHOLD) sgfci{~
mergeSort(data, temp, l, mid); 9h/JW_
else 30fqD1_{
insertSort(data, l, mid - l + 1); ?qJt4Om
if ((r - mid) > THRESHOLD) LLD#)Jl{?
mergeSort(data, temp, mid + 1, r); 7)zF8V
else xN +Oca
insertSort(data, mid + 1, r - mid); 3[r9v!l
Ej#pM.
for (i = l; i <= mid; i++) { Bbj%RF2,
temp = data; 'i;/?'!W6
} De^Uc
for (j = 1; j <= r - mid; j++) { 3k_bhK zI
temp[r - j + 1] = data[j + mid]; s,|"s|P
} Tg yY 9
int a = temp[l]; KSgYf;
int b = temp[r]; S(ky:
for (i = l, j = r, k = l; k <= r; k++) { kb~;s-$O`s
if (a < b) { >[r,X$]
data[k] = temp[i++]; n1
a = temp; Usl963A#'F
} else { CwdeW.A"j
data[k] = temp[j--]; h#~\-j9>
b = temp[j]; - U Elu4n&
} X"EZpJ'W
} 5D6 ,B
} aESlbH
qx f8f
/** VXP@)\!
* @param data r>_40+|&
* @param l "STd ;vR
* @param i cUj^aTpm
*/ svRYdInBNu
private void insertSort(int[] data, int start, int len) { C-tkYP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i38`2
} +[B@83
} (,I9|
} p?V@P6h
} W!o|0u!D
3k# h!Z
堆排序： Xx?~%o6
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package org.rut.util.algorithm.support; t b>At*tO
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import org.rut.util.algorithm.SortUtil; 5#U=x ,7e
k{C03=xk
/** zFm:=,9
* @author treeroot " 7g\X$
* @since 2006-2-2 1)t*l;.
* @version 1.0 B*OBXN>'P
*/ wO&+Bb\=
public class HeapSort implements SortUtil.Sort{ F S!D
*nx$r[Mqj
/* (non-Javadoc) V{C{y5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g@|2z
*/ xU;/LJ6
public void sort(int[] data) { ESmWK;7b
MaxHeap h=new MaxHeap(); t_kRYdW9
h.init(data); Y+nk:9
for(int i=0;i h.remove(); sH51 .JG
System.arraycopy(h.queue,1,data,0,data.length); |crm{]7X
} L/xTW
NiBly
private static class MaxHeap{ 0q o]nw
3W3)%[ 5
void init(int[] data){ f-`C1|\w
this.queue=new int[data.length+1]; ]XjL""EbC
for(int i=0;i queue[++size]=data; e]*@|e4b
fixUp(size); UW'@3#<?
} cnz+%Y N
} '1"vwXJ"
v(P5)R,
private int size=0; @kWRI*m
z#*>u
private int[] queue; Oh5aJ)"D
#c$z&J7e
public int get() { G]zyx"0Sqb
return queue[1]; j1O_Az|3
} "0aJE1)p:
oH;9s-Be
public void remove() { r!;wKO
SortUtil.swap(queue,1,size--); vLIaTr gz
fixDown(1); 9>r@wK'Pn
} SNc$!
file://fixdown _6.Y3+7I
private void fixDown(int k) { |_mN:(3
int j; Jd28/X5&
while ((j = k << 1) <= size) { \49s;\I]
if (j < size %26amp;%26amp; queue[j] j++; "sYZ3
if (queue[k]>queue[j]) file://不用交换 3QDz9KwCAw
break; UsgrI>|l
SortUtil.swap(queue,j,k); TjS&V
k = j; G=PX'dS
} .`jYrW-k
} (*Z:ByA
private void fixUp(int k) { ?T)M z q}
while (k > 1) { X16vvsjw5
int j = k >> 1; H,EGB8E2
if (queue[j]>queue[k]) PZihC
break; F^CR$L& K
SortUtil.swap(queue,j,k); t!\B6!Fo
k = j; &3 *#h
} ?N=`}}Ky-
} ;r}yeISf
sBa&]9>m
} |4rqj1*U
^$s&bH'8
} y I}>
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SortUtil： Y)2#\ F
(_=R<:
package org.rut.util.algorithm; =wlPm5
JPM~tp?;<
import org.rut.util.algorithm.support.BubbleSort; :!wl/X ~
import org.rut.util.algorithm.support.HeapSort; *tfD^nctO
import org.rut.util.algorithm.support.ImprovedMergeSort; vZ1?4hG
import org.rut.util.algorithm.support.ImprovedQuickSort; X#tCIyK,nV
import org.rut.util.algorithm.support.InsertSort; Y|S>{$W
import org.rut.util.algorithm.support.MergeSort; V[0 ZNT&
import org.rut.util.algorithm.support.QuickSort; F *1w8+
import org.rut.util.algorithm.support.SelectionSort; |t~*!0>3
import org.rut.util.algorithm.support.ShellSort; fR]KXfZ
KNjU!Z/4
/** A<+1:@0
* @author treeroot !oYNJE Y7
* @since 2006-2-2 =w/AJ%6
* @version 1.0 3_"tds <L
*/ o,RiAtdk
public class SortUtil { w+$~ds
public final static int INSERT = 1; 4UHviuOo8
public final static int BUBBLE = 2; B.:1fT7lI
public final static int SELECTION = 3; z9E*1B+
public final static int SHELL = 4; <R?S
public final static int QUICK = 5; u.Tknw-X
public final static int IMPROVED_QUICK = 6; s8dP=_ `
public final static int MERGE = 7; Z1_F)5pn
public final static int IMPROVED_MERGE = 8; Dt\rrN:v
public final static int HEAP = 9; beB3*o
[\rzXE
public static void sort(int[] data) { ]3~u @6
sort(data, IMPROVED_QUICK); Y h53Z"a
} J-qUJX~4c
private static String[] name={ S6Y:Z0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $\q.Zb
}; f)mOeD*u|
0Oa&vx
private static Sort[] impl=new Sort[]{ -us:!p1T
new InsertSort(), [5]n,toAh
new BubbleSort(), /=g/{&3[a>
new SelectionSort(), Yl=-j
new ShellSort(), >[;L.
new QuickSort(), 8erG](
new ImprovedQuickSort(), +J#8wh
new MergeSort(), 5fRrd;
new ImprovedMergeSort(), B$qTH5)W
new HeapSort() 5?[hr5E.E
}; Q%524%f$
q]U!n
public static String toString(int algorithm){ ]D4lZK>H
return name[algorithm-1]; Tn9Fg7<
} !E|m'_x*
bu-6}T+
public static void sort(int[] data, int algorithm) { {< EPm&q
impl[algorithm-1].sort(data); O[\mPFu5
} #8~ygEa}
KTBtLUH]*F
public static interface Sort { }I1j#d0.
public void sort(int[] data); (\o4 c0UzK
} =R"LB}>h}
P@D\5}*6
public static void swap(int[] data, int i, int j) { a_-@rceU
int temp = data; w|Ry)[
data = data[j]; f8ZuG !U
data[j] = temp; #lc6-K#
} d2TIG<6/
} w@Asz9Lq%