[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; f{k2sU*uBE
} BWfsk/lej
int i1=l; ?IGT!'
int i2=mid+1; 6'+3""\
for(int cur=l;cur<=r;cur++){ hSo\
if(i1==mid+1) rFdq \BSi
data[cur]=temp[i2++]; MXSPD#gN
else if(i2>r) 7L? ~;;L$
data[cur]=temp[i1++]; YYZE-{ %
else if(temp[i1] data[cur]=temp[i1++]; vX/~34o]\
else j01#Wq_\fk
data[cur]=temp[i2++]; SWPr5h
} oG3>lqBwD2
} / ~w\Npf0
V!a\:%#^Y
} F{B__Kf
8b[^6]rM
改进后的归并排序: 28>gAz.#
E@Q+[~H}
package org.rut.util.algorithm.support; j#Bea ,
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import org.rut.util.algorithm.SortUtil; ja#E}`wC4
89k9#i X
/** s+h`,gg9
* @author treeroot *'1qA0Xc
* @since 2006-2-2 ZlUd^6|:3
* @version 1.0 ~OAST
*/ gj0gs
public class ImprovedMergeSort implements SortUtil.Sort { g3Xq@RAJc
y4w{8;Mh
private static final int THRESHOLD = 10; sas;<yh
(6L[eWuTn
/* fnN"a Z
* (non-Javadoc) v\'Eo*4
* b(wW;C'#0p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \|L ~#{a
*/ )k.;.7dXe
public void sort(int[] data) { `lRZQ:27X
int[] temp=new int[data.length]; %D)W~q-g
mergeSort(data,temp,0,data.length-1); 4'cdV0]
} ^dJ/>?1
#tRLvOR:
private void mergeSort(int[] data, int[] temp, int l, int r) { Jlj=FA`
int i, j, k; :,h47'0A
int mid = (l + r) / 2; d OQU#5
if (l == r) e23}'qb
return; 7q&Ru|T33
if ((mid - l) >= THRESHOLD) ,edX;`#
mergeSort(data, temp, l, mid); a^hDxeG
else Eaf6rjD
insertSort(data, l, mid - l + 1); s5_[[:c=^
if ((r - mid) > THRESHOLD) Rq-BsMX!A
mergeSort(data, temp, mid + 1, r); jQxv`H
else Q=}p P*
insertSort(data, mid + 1, r - mid); fI9 TzpV
3xj ?}o
for (i = l; i <= mid; i++) { 9tDo5 29
temp = data; u[5*RTE
} 'H+H4(
for (j = 1; j <= r - mid; j++) { b_+dNoB
temp[r - j + 1] = data[j + mid]; (RW02%`jjy
} _Q_"_*e
int a = temp[l]; !C]0l
int b = temp[r]; H`odQkZ!
for (i = l, j = r, k = l; k <= r; k++) { "xe % IS
if (a < b) { ZCsL%(
data[k] = temp[i++]; $$ma1.t"
a = temp; wl|cipy"
} else { 'id]<<F
data[k] = temp[j--]; E&ou(Q={
b = temp[j]; In<L?U?([D
} do@`(f3g
} 7VQ|3`!<
} =m]|C1x
I-<U u2
/** d~n|F|`:
* @param data rG)K?B~
* @param l +ExXhT
* @param i AWsy9
*/ ,kS3Ioj
private void insertSort(int[] data, int start, int len) { Qa-]IKOs
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6vy(@z
} 6%?bl{pNn
} r$7fw}'I
} GF]V$5.ps
} aly1=j
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堆排序： @)nxX))a
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package org.rut.util.algorithm.support; TrA&yXXL
ixc~DV+@[
import org.rut.util.algorithm.SortUtil; P|c[EUT
3Ov? kWFO
/** YhQ;>Ko
* @author treeroot od\-o:bS
* @since 2006-2-2 gT3i{iU
* @version 1.0 zb<YYJ]
*/ BCUn[4Gp
public class HeapSort implements SortUtil.Sort{ ~\HGV+S!g}
nKxu8YAJe
/* (non-Javadoc) W`auQO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^&^~LKl~
*/ ICq
public void sort(int[] data) { Q)vf>LwC2S
MaxHeap h=new MaxHeap(); Z]VmTB
h.init(data); B+)HDIPa-
for(int i=0;i h.remove(); '8RBR%)y
System.arraycopy(h.queue,1,data,0,data.length); :<Z>?x
} E+'P|~>oX
9:[L WT&
private static class MaxHeap{ X1LwIa>
_c:}i\8R
void init(int[] data){ OH+kN/Fd
this.queue=new int[data.length+1]; i"4&UJu1;
for(int i=0;i queue[++size]=data; R#8.]
fixUp(size); e#{,M8
} :U>[*zE4&
} g$CWGB*%lm
xJ=@xfr$
private int size=0; 0 rge]w.X
A.[~}ywH
private int[] queue; Uxll<z,
()cqax4
public int get() { {`KRr:w
return queue[1]; Y:;]qoF
} n\/ JNzd3
JJE3\
public void remove() { %]U'
SortUtil.swap(queue,1,size--); >)+-:
fixDown(1); Pjvzefp
} qL;T^ljP
file://fixdown WciL zx/
private void fixDown(int k) { _/\U
int j; 4Y.o RB
while ((j = k << 1) <= size) { |L}1@0i
if (j < size %26amp;%26amp; queue[j] j++; #?^%#"~4H
if (queue[k]>queue[j]) file://不用交换 igGg[I1?
break; v-utDQT3
SortUtil.swap(queue,j,k); V]{^}AKc
k = j; eI@nskq#
} <meQ
} d~hN`ff
private void fixUp(int k) { vAV{HBQ*
while (k > 1) { l(~i>iQ 4
int j = k >> 1; 3<"!h1x5
if (queue[j]>queue[k]) |qAU\m"Pc
break; l>t0 H($
SortUtil.swap(queue,j,k); GxynLXWo>
k = j; l.iT+T
} U)sw IisE
} {0Jpf[.f
C{<dzooz
} ey/=\@[p
8N,mp>~
} 0e,U&B<W
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SortUtil： #-<n@qNg[
7.W$6U5
package org.rut.util.algorithm; wV{jJyRl
6Qx[W>I
import org.rut.util.algorithm.support.BubbleSort; |!?lwBs4
import org.rut.util.algorithm.support.HeapSort; n~mP7X%wE7
import org.rut.util.algorithm.support.ImprovedMergeSort; zu!#
import org.rut.util.algorithm.support.ImprovedQuickSort; %8hx3N8>
import org.rut.util.algorithm.support.InsertSort; esk~\!d
import org.rut.util.algorithm.support.MergeSort; t4H*&U
import org.rut.util.algorithm.support.QuickSort; PFSh_9.q
import org.rut.util.algorithm.support.SelectionSort; G5T(
import org.rut.util.algorithm.support.ShellSort; 0/4"Jh$t
UV#DN`%n
/** h~r&7G@[}
* @author treeroot 0qSf7"3f
* @since 2006-2-2 @p2XaqZ
* @version 1.0 !;U;5e=0
*/ OBEHUJ5
public class SortUtil { B'QcD
public final static int INSERT = 1; \<kQ::o1y
public final static int BUBBLE = 2; ,w|Or}h]7
public final static int SELECTION = 3; HU47S
public final static int SHELL = 4; LKsK!X
public final static int QUICK = 5; QZ2a1f'G
public final static int IMPROVED_QUICK = 6; ~LU$ no^
public final static int MERGE = 7; ('oA{,#L
public final static int IMPROVED_MERGE = 8; CYn56eRK
public final static int HEAP = 9; QnH;+k ln
kVY0 E
public static void sort(int[] data) { E(miQ
sort(data, IMPROVED_QUICK); Cb i;CF\{
} hEk0MY
private static String[] name={ &,%+rvo}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3ahbv%y
}; J_}Rsp ED
t+tD
private static Sort[] impl=new Sort[]{ Prqr,
new InsertSort(), I/k/5
new BubbleSort(), ^EZ?wdL
new SelectionSort(), {D`_q|
new ShellSort(), 3,dIW*<**
new QuickSort(), n^2'O:Vs
new ImprovedQuickSort(), nPg,(8Tt
new MergeSort(), |TQa=
new ImprovedMergeSort(), X(qs]:
new HeapSort() /?B%,$~
}; .gs:.X)TG9
4Pkl()\c
public static String toString(int algorithm){ Q4B(NYEu(
return name[algorithm-1]; L5n/eg:Q
} kB]?95>Wx
-/LB-t
public static void sort(int[] data, int algorithm) { &2//\Qz
impl[algorithm-1].sort(data); CQh6;[\:
} U`kO<ztk
5D<"kT
public static interface Sort { p.RSH$]
public void sort(int[] data); oA`G\Xh_E
} o)sX?IiC
>d<tcaB
public static void swap(int[] data, int i, int j) { ds:&{~7L<T
int temp = data; v])R6-T-
data = data[j]; $&KiN82,
data[j] = temp; m=qyPY
} Po7oo9d
} 6(-c$d`C.0