[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; jD&}}:Dj
} k#l'ko/X
int i1=l; {q5hF5!`)
int i2=mid+1; @oe3i
for(int cur=l;cur<=r;cur++){ "cnG/{($*
if(i1==mid+1) +=n x|:no
data[cur]=temp[i2++]; #J%h!#3g
else if(i2>r) v:'P"uU;4
data[cur]=temp[i1++]; 9`nP(~
else if(temp[i1] data[cur]=temp[i1++]; *X-~TC0 [
else HB/ _O22
data[cur]=temp[i2++]; &%_y6}xIw
} "Qiq/"h
} #C;#$|d
2:smt)f
} pl1EJ <
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改进后的归并排序: t[H_6)
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package org.rut.util.algorithm.support; 73! x@Duh
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import org.rut.util.algorithm.SortUtil; L<[,7V
[)b/uR
/** [T$$od[.
* @author treeroot o m{n"cg
* @since 2006-2-2 ^>P@5gcoE(
* @version 1.0 ;-<<1Jz/2
*/ <.y^
public class ImprovedMergeSort implements SortUtil.Sort { .@x"JI>;
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private static final int THRESHOLD = 10; S7\|/h:4
tZJ 9}\r
/* P /f ~
* (non-Javadoc) 2Wc;hJ.1
* I'6ed`|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Eo25ir%
*/ H)?" 8 s
public void sort(int[] data) { g-TX;(
int[] temp=new int[data.length]; ];wohW%
mergeSort(data,temp,0,data.length-1); f|[5&,2<
} JydQA_
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private void mergeSort(int[] data, int[] temp, int l, int r) { BT*K,p
int i, j, k; 'nmYB:&!
int mid = (l + r) / 2; *}Ae9
if (l == r) +Fy-~Mq
return; ]i_):@
if ((mid - l) >= THRESHOLD) <R]Wy}2-
mergeSort(data, temp, l, mid); {?h6*>-^Z
else Z{R=h7P
insertSort(data, l, mid - l + 1); Do{*cSd
if ((r - mid) > THRESHOLD) tM?I()Y&P
mergeSort(data, temp, mid + 1, r); FdK R{dX}
else :,J86#S)
insertSort(data, mid + 1, r - mid); |L~gNC
w~FO:/
for (i = l; i <= mid; i++) { n(F<
temp = data; ve_4@J)
} ht[TMdV
for (j = 1; j <= r - mid; j++) { !Vod0j">
temp[r - j + 1] = data[j + mid]; jrMGc=KL
} jAQ)3ON<
int a = temp[l]; ^PCL^]W
int b = temp[r]; -7Y'6''~W.
for (i = l, j = r, k = l; k <= r; k++) { 9M-]~.O
if (a < b) { Z!5m'yZO
data[k] = temp[i++]; J4R
a = temp; 5SPl#*W
} else { 0ju wDd
data[k] = temp[j--]; }M"'K2_Z
b = temp[j]; 0"D?.E"$r
} S+\Mt+o
} YJtOdgG|q
} jWb\"0)
?;r7j V/`j
/** 4VL!U?dk
* @param data Se]t;7j
* @param l V[2<ha[n>
* @param i 14)kKWG
*/ <pa];k(IQL
private void insertSort(int[] data, int start, int len) { *^$N$t/2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e715)_HD
} 66y,{t
} ?2bE=|
} ]V[
} EPUJa~4
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堆排序： }X.8.S'
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package org.rut.util.algorithm.support; l#(g&x6J
~'YSVx& )
import org.rut.util.algorithm.SortUtil; I7-PF?
w `9GygS
/** UVuuIW0k
* @author treeroot 0O9 Lg}
* @since 2006-2-2 :ftyNaq'
* @version 1.0 L[9+xK^g
*/ f>JzG,-
public class HeapSort implements SortUtil.Sort{ ki/Lf4
:\HN?_?{4
/* (non-Javadoc) dIh(~KqB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &T4Cn@
*/ _\V{X}ftqa
public void sort(int[] data) { sT8kVN|Uv
MaxHeap h=new MaxHeap(); %Zi,nHg8
h.init(data); mjJlXA
for(int i=0;i h.remove(); SEn8t"n
System.arraycopy(h.queue,1,data,0,data.length); <PA$hTYM
} pmXWI`s
|r*1.V(
private static class MaxHeap{ mwiPvwHrg
o~z.7q
void init(int[] data){ gQzF C&g
this.queue=new int[data.length+1]; IaZAP
for(int i=0;i queue[++size]=data; 5;%xqdD
fixUp(size); 5Szo5
} HrcnyQ`Q0
} 78}%{7YY
X=7vUb,\gB
private int size=0; GTX&:5H\t
"+OMo-<K7
private int[] queue; d=Ihl30m
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public int get() { @!tmUme1c
return queue[1]; 2/W0y!qh1
} e&I.kC"j6
R~u7;Wv
public void remove() { D}=i tu
SortUtil.swap(queue,1,size--); C]@B~X1H^
fixDown(1); PDiorW}]k
} Ts *'f
file://fixdown (?=(eo<N
private void fixDown(int k) { ku8Z;ONeH
int j; rs KE
while ((j = k << 1) <= size) { a*@Z^5f
if (j < size %26amp;%26amp; queue[j] j++; 60gn`s,,
if (queue[k]>queue[j]) file://不用交换 mTu9'/$(
break; 5 BG&r*U
SortUtil.swap(queue,j,k); CKK5+
k = j; W;*vcbP
} '<jp.sZQ
} ?9M+fi
private void fixUp(int k) { B,qZwc|
while (k > 1) { yD'h5)yu
int j = k >> 1; &~6O;}\
if (queue[j]>queue[k]) E&=?\KM
break; M%LwC/h:,
SortUtil.swap(queue,j,k); R1rfp;
k = j; p_y*-,W (
} tg4&j$
} %bETr"Xom
)%W2XvG
} 8U$UI
jWjK-q@Y
} }|,\?7,
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SortUtil： 3om7LqcRo
biuo.OG]
package org.rut.util.algorithm; RB@gSHOc?
@k;3$
import org.rut.util.algorithm.support.BubbleSort; ;^SgV
import org.rut.util.algorithm.support.HeapSort; 3W00,f^9
import org.rut.util.algorithm.support.ImprovedMergeSort; KV(W|~+rM
import org.rut.util.algorithm.support.ImprovedQuickSort; LA3,e (e
import org.rut.util.algorithm.support.InsertSort; T"lqPbK
import org.rut.util.algorithm.support.MergeSort; MO+0]uh:
import org.rut.util.algorithm.support.QuickSort; Ft>8 YYyU
import org.rut.util.algorithm.support.SelectionSort; l"g%vS,;`
import org.rut.util.algorithm.support.ShellSort; "TCbO`mg
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/** KAaeaiD
* @author treeroot `qEm5+`
* @since 2006-2-2 yL,B\YCf8
* @version 1.0 !KW)*
*/ z{_Vn(Kg
public class SortUtil { TuR?r`P%
public final static int INSERT = 1; FC.-u"V
public final static int BUBBLE = 2; SQvB)NOw
public final static int SELECTION = 3; EnAw8Gm*
public final static int SHELL = 4; qWK7K%-$E
public final static int QUICK = 5; TUCpmj
public final static int IMPROVED_QUICK = 6; 6XqO'G
public final static int MERGE = 7; JH,+F
public final static int IMPROVED_MERGE = 8; T0C'$1T
public final static int HEAP = 9; 6!m#_z8qG3
0{uX2h
public static void sort(int[] data) { 8zv6Mx
sort(data, IMPROVED_QUICK); a_j#l(] 9
} p =O1aM
private static String[] name={ NX/)Z&Fx:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <o`]wOrl
}; N_}Im>;!
G*V 7*KC
private static Sort[] impl=new Sort[]{ NsK>UJ'
new InsertSort(), nr6U> KR^
new BubbleSort(), eHIC'b.
new SelectionSort(), SpQ6A]M gm
new ShellSort(), WJ,ON-v
new QuickSort(), =,9'O/br
new ImprovedQuickSort(), nQMN2jM
new MergeSort(), -I<`!kH*
new ImprovedMergeSort(), o?\Pw9Y
new HeapSort() l^Z~^.{y
}; $RO=r90o
gDIB'Y
public static String toString(int algorithm){ fR{7780WZ
return name[algorithm-1]; s_$@N!
} VNfx>&`
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public static void sort(int[] data, int algorithm) { JE!Xf}nEi
impl[algorithm-1].sort(data); ~<-h# B
} cFo-NI2
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public static interface Sort { s^< oU
public void sort(int[] data); P]^] T}5
} J]e&z5c
2j|Eh
public static void swap(int[] data, int i, int j) { P40eK0e6
int temp = data; S d -+a
data = data[j]; *8+YR
data[j] = temp; ru Lcu]
} }Qo8Xps
} b?,y%D)'