[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; Lq;T\m_de
} JOJuGB-d
int i1=l; fp*6Dv_
int i2=mid+1; *ow`}Q
for(int cur=l;cur<=r;cur++){ n}t9Nf_
if(i1==mid+1) .]s? 01Z
data[cur]=temp[i2++]; >]8(3&zd
else if(i2>r) -DK6(<:0
data[cur]=temp[i1++]; %P D}VF/Y
else if(temp[i1] data[cur]=temp[i1++]; uVKe?~RC
else 9!FU,4 X
data[cur]=temp[i2++]; KJ:z\N8eo
} yjsj+K pL
} "{\xBX~oM
Np%Q-T\
} k1oJ<$Q
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改进后的归并排序: z~3GgR"1d
1YQYZ^11
package org.rut.util.algorithm.support; AwjXY,2
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import org.rut.util.algorithm.SortUtil; m#8(l{3|
kJpO0k9?eY
/** TY'c'u,
* @author treeroot [T,Hpt
* @since 2006-2-2 (xHu@l!]
* @version 1.0 i1XRBC9
*/ AO>b\,0Me
public class ImprovedMergeSort implements SortUtil.Sort { U[02$gd0l
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private static final int THRESHOLD = 10; 1ANFhl(l
y*ZA{
/* =yz"xWH
* (non-Javadoc) #:+F
* ti (Hx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 57EX#:a
*/ w%s];EE
public void sort(int[] data) { :L@n(buRN
int[] temp=new int[data.length]; tcT=a@
mergeSort(data,temp,0,data.length-1); '(rD8 pc
} r7oFG!.?
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private void mergeSort(int[] data, int[] temp, int l, int r) { D=mmBo
int i, j, k; pZ}B/j
int mid = (l + r) / 2; ]J'TebP=L5
if (l == r) =Y81h-
return; *asv^aFpS
if ((mid - l) >= THRESHOLD) iiQ q112`
mergeSort(data, temp, l, mid); z=) m6\
else 9I]Bt=2z
insertSort(data, l, mid - l + 1); c8YbBdk'
if ((r - mid) > THRESHOLD) LXh}U>a9
mergeSort(data, temp, mid + 1, r); sYBmL]Hr
else n@xQ-v
insertSort(data, mid + 1, r - mid); nq HpYb6I0
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for (i = l; i <= mid; i++) { f)j*P<V
temp = data; @fYVlHT%E
} r dSL
for (j = 1; j <= r - mid; j++) { 8-NycG&)
temp[r - j + 1] = data[j + mid]; ~abyjM
} X!K>.r_Dg
int a = temp[l]; `(h^z>%
int b = temp[r]; nAWb9Yk
for (i = l, j = r, k = l; k <= r; k++) { n0T|U
if (a < b) { 1P(=0\P>&
data[k] = temp[i++]; @B(oq1i@
a = temp; 8T9s:/%
} else { .Y{x!Q"
data[k] = temp[j--]; v:/\;2
b = temp[j]; \Q(a`6U
} Lv]%P.=[G
} "A"YgD#t
} Qy0w'L/@
'I&0$<
/** F5RL+rU(h
* @param data T>'O[=UWh
* @param l ,wes*
* @param i #55:qc>m
*/ <O 0Q]`i
private void insertSort(int[] data, int start, int len) { Rlk3AWl2u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n 5R9<A^
} oG1zPspL
} +1YEOOfVY
} ioD8-
} 9Z!n!o7D
;W|NG3_y
堆排序： XDJE]2^52?
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package org.rut.util.algorithm.support; H" `'d
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import org.rut.util.algorithm.SortUtil; ,\iHgsZ
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/** Z! O4hA4
* @author treeroot ~q}L13^k
* @since 2006-2-2 (g@\QdH`|
* @version 1.0 !i~(h&z
*/ *lvADW5e
public class HeapSort implements SortUtil.Sort{ x C&IR*
zplv.cf#q
/* (non-Javadoc) RB+Jp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wDh]vH[
*/ TPJF?.le '
public void sort(int[] data) { nK :YbLdK,
MaxHeap h=new MaxHeap(); s{Qae=$Q
h.init(data); h8asj0
for(int i=0;i h.remove(); wpM2{NTP
System.arraycopy(h.queue,1,data,0,data.length); wK-VA$;:
} } 7 o!
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private static class MaxHeap{ xj;:B( i
K<*6E@+i
void init(int[] data){ aE5-b ub c
this.queue=new int[data.length+1]; kZz'&xdv'.
for(int i=0;i queue[++size]=data; {WrEe7dLy
fixUp(size); 0fXMY-$I
} NUYKMo1ze
} G-T^1?
* )<+u~
private int size=0; 8F8?1
o'$"MC+
private int[] queue; ]6^<VC`5D
{IJ;)<>&VE
public int get() { "u7[[.P)
return queue[1]; \,G9'c 'u
} 1;$XX#7o
aYaEy(m
public void remove() { N9_* {HOy
SortUtil.swap(queue,1,size--); =WT$\KYGv
fixDown(1); L T$U z
} uL/wV~g
file://fixdown ~Mn3ADIb=
private void fixDown(int k) { H9(?yI@Zr#
int j; EcB !bf
while ((j = k << 1) <= size) { >;I8w(
if (j < size %26amp;%26amp; queue[j] j++; 5q0L<GOrj
if (queue[k]>queue[j]) file://不用交换 t|>zke!'
break; ML905n u
SortUtil.swap(queue,j,k); r)5xS]
k = j; 7yfh4-1M
} !l0]IX` F
} Jx.fDVJ
private void fixUp(int k) { am]M2+,2Ip
while (k > 1) { 3@I0j/1#k1
int j = k >> 1; nU>P%|loXx
if (queue[j]>queue[k]) pNb2t/8%%
break; Sk|e#{
SortUtil.swap(queue,j,k); HJAiQ[m5s
k = j; R7Y_ 7@p
} x8rg/y
} =:s`C,l.4
WT ;2aS:
} SUUNC06V
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} &" t~d}Rg
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SortUtil： L5FOlzn
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package org.rut.util.algorithm; y{hg4|\
8D )nM|
import org.rut.util.algorithm.support.BubbleSort; C>+n>bH]L
import org.rut.util.algorithm.support.HeapSort; ,~d0R4)
import org.rut.util.algorithm.support.ImprovedMergeSort; N@c GjpQ
import org.rut.util.algorithm.support.ImprovedQuickSort; +-<G(^
import org.rut.util.algorithm.support.InsertSort; <}RI<96
import org.rut.util.algorithm.support.MergeSort; n>ui'}L
import org.rut.util.algorithm.support.QuickSort; TF/NA\0c$
import org.rut.util.algorithm.support.SelectionSort; U*r54AyP
import org.rut.util.algorithm.support.ShellSort; }pMVl
VC88re`
/** $z%(He
* @author treeroot >)ekb7
* @since 2006-2-2 V6][*.i!9
* @version 1.0 [;z\bV<S
*/ *<xu3){:c
public class SortUtil { uslu-|b!%
public final static int INSERT = 1; "@nH;Xlq
public final static int BUBBLE = 2; 4?+K `
public final static int SELECTION = 3; -"I$$C
public final static int SHELL = 4; jhm3:;Z
public final static int QUICK = 5; ,'|J
public final static int IMPROVED_QUICK = 6; s-"KABEE
public final static int MERGE = 7; _Z0 .c@0
public final static int IMPROVED_MERGE = 8; N55F5
public final static int HEAP = 9; :VT%d{Vp_
uB I/3aQ
public static void sort(int[] data) { g{]6*`/Z
sort(data, IMPROVED_QUICK); #%;Uh
} .]vb\NBK7
private static String[] name={ 3}H{4]*%_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;_bRq:!j;
}; Uqel UL}
wb.yGfJ
private static Sort[] impl=new Sort[]{ _aFe9+y
new InsertSort(), Mr)t>4
new BubbleSort(), S&!(h {O
new SelectionSort(), Y#9W]78He
new ShellSort(), n|{K_! f
new QuickSort(), 7 XxZF43
new ImprovedQuickSort(), E5^\]`9P
new MergeSort(), >N|?>M*
new ImprovedMergeSort(), D m0)%#
new HeapSort() e(8hSVcl4
}; 5IF5R#
A'jvm@DvQI
public static String toString(int algorithm){ `"=>lu2H
return name[algorithm-1]; I<D#
} K ";Et
;g!rc#z2g
public static void sort(int[] data, int algorithm) { dkw.o.e
impl[algorithm-1].sort(data); aoey 5hts
} GmB&TDm
,&UKsrs_
public static interface Sort { a dqS.xs
public void sort(int[] data); EQ$k^Y8 "
} UDG1F_&h
9)oi_U.
public static void swap(int[] data, int i, int j) { r%=-maPL[
int temp = data; B"_O!
data = data[j]; b-<0\@`Z#
data[j] = temp; v?VDASR2`
} >Q/;0>V
} V$ H(a`!