[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; Lv|q
} N"]q='t
int i1=l; {so`/EWa
int i2=mid+1; [H6hyG~
for(int cur=l;cur<=r;cur++){ 3BtaH#ZY
if(i1==mid+1) bn!HUM,
data[cur]=temp[i2++]; /H8g(
else if(i2>r) fh](K'P#^
data[cur]=temp[i1++]; p-Kz-+A[
else if(temp[i1] data[cur]=temp[i1++]; CIb2J)qev
else ti I.W
data[cur]=temp[i2++]; >8k_n
} GBRa.;Kk
} f@Zszt
Q36qIq_0e
} .^h#_[dp
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改进后的归并排序: D;;!ODX$?
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package org.rut.util.algorithm.support; 9%B\/&f
0:9.;x9_
import org.rut.util.algorithm.SortUtil; G+X Sfr
xlA$:M&
/** uTKD 4yig
* @author treeroot 2QJ{a46}
* @since 2006-2-2 ,N!o
* @version 1.0 2E}*v5b,
*/ |4B:<x
public class ImprovedMergeSort implements SortUtil.Sort { <Bw^!.jAF
hRUhX[
private static final int THRESHOLD = 10; {(r`k;fB
n:yTeZ=-s4
/* DXJ`oh
* (non-Javadoc) s'%R
* 8W,Jh8N6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mP0yk|
*/ m^ tFi7c
public void sort(int[] data) { :lf+W
int[] temp=new int[data.length]; rA%usaW
mergeSort(data,temp,0,data.length-1); vgfcCcZ_iZ
} D-5VC9{
mi,E-
private void mergeSort(int[] data, int[] temp, int l, int r) { P<M?Qd1.
int i, j, k; gm igsXQ
int mid = (l + r) / 2; Z -W(l<
if (l == r) ZWc]$H?
return; ykV 5
if ((mid - l) >= THRESHOLD) 05b_)&4R
mergeSort(data, temp, l, mid); A v2 08}Y
else jRJn+
insertSort(data, l, mid - l + 1); CGY]r.O*
if ((r - mid) > THRESHOLD) SL#0kc0x
mergeSort(data, temp, mid + 1, r); a&c6.#E{y
else <{V(.=11
insertSort(data, mid + 1, r - mid); Mxyb5h
glM$R&/
for (i = l; i <= mid; i++) { 7UVzp v
temp = data; s$Z _48
} _B/dWA,P
for (j = 1; j <= r - mid; j++) { >z%&xgOa
temp[r - j + 1] = data[j + mid]; ]n_ k`
} GO`Ru 8
int a = temp[l]; >8WP0Qx/
int b = temp[r]; ]:4*L
for (i = l, j = r, k = l; k <= r; k++) { Ju96#v+:
if (a < b) { @~!wDDS
data[k] = temp[i++]; 8FKXSqhVM
a = temp; zgNc4B
} else { zNxW'?0Z?
data[k] = temp[j--]; '98VYCL
b = temp[j]; kEOS{C%6R
} "B3N*R(["
} JBE!j-F
} mS(fgq6
UNom-
/** Ta(Y:*Ri
* @param data S- pV_Ff
* @param l K/i*w<aPb7
* @param i `6lr4Kk @R
*/ V^3L3|k
private void insertSort(int[] data, int start, int len) { ]xRM&=)<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G,o6292hj
} E"qRw_ ~t
} &cxRD
} Y9uC&/_C
} Pv_Jm
9N@W\DT
堆排序： ,z;cbsV-{
&O9 |#YUq
package org.rut.util.algorithm.support; H`1{_
W+UfGk}A
import org.rut.util.algorithm.SortUtil; 0ZZZoPo
%E#s\B,w
/** _ba>19csq%
* @author treeroot LhOa{1SY
* @since 2006-2-2 M+U9R@
* @version 1.0 [@J/eWB
*/ 6$kqaS##
public class HeapSort implements SortUtil.Sort{ AgS7J(^&3
[x+FcXb
/* (non-Javadoc) +S>j0m<*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Al}6q{E9+8
*/ `UD/}j@
public void sort(int[] data) { ad*m%9Y1Q
MaxHeap h=new MaxHeap(); W-mQjJ`,B
h.init(data); B:'J`M"N
for(int i=0;i h.remove(); 41`n1:-]
System.arraycopy(h.queue,1,data,0,data.length); R=gb'
} lR )67a
.E`\MtA
private static class MaxHeap{ |bTPtrT8
G`cHCP_n
void init(int[] data){ ZrPbl"`7
this.queue=new int[data.length+1]; KN<S}3MN
for(int i=0;i queue[++size]=data; /N=b\-]
fixUp(size); 6:b!F
} RL!Oi|8
} y0sR6TY)f
0z1ifg&
private int size=0; L 6c 40
A\4D79>x
private int[] queue; }Yb[
^E;kgED5
public int get() { Q6PHpaj
return queue[1]; eD,.~Y#?=
} FHj" nB
ur)9x^y
public void remove() { Of*Pw[vD
SortUtil.swap(queue,1,size--); 4ezEW|S
fixDown(1); _ TiuY
} r)y=lAyF>
file://fixdown aS{|uE]
private void fixDown(int k) { l3Xfc2~ 2
int j; Sc\*W0m
while ((j = k << 1) <= size) { u(@$a4z
if (j < size %26amp;%26amp; queue[j] j++; '))0Lh l
if (queue[k]>queue[j]) file://不用交换 L-ET<'u
break; kVkU)hqR
SortUtil.swap(queue,j,k); xN5)
k = j; `, OG7hg
} @5N]ZQ9
} smlpD3?va
private void fixUp(int k) { ;rF\kX&Jh
while (k > 1) { 2;k*@k-t
int j = k >> 1; Sdp&jZY
if (queue[j]>queue[k]) x-$&g*<
break; VJeu8ZJ.
SortUtil.swap(queue,j,k); |,S+@"0#
k = j; a!a-b~#cx
} T-.%
} Bal$+S
GzhYY"iif#
} J?V?R
``,fodA8
} }JF13beU
e%svrJ2
SortUtil： eWCb73
`#rL*;\uV
package org.rut.util.algorithm; joFm]3$;
,f~J`3(&
import org.rut.util.algorithm.support.BubbleSort; qB5j;@r
import org.rut.util.algorithm.support.HeapSort; gqZ'$7So
import org.rut.util.algorithm.support.ImprovedMergeSort; y&6FybIz
import org.rut.util.algorithm.support.ImprovedQuickSort; `95r0t0hh\
import org.rut.util.algorithm.support.InsertSort; _GV:HOBi
import org.rut.util.algorithm.support.MergeSort; PRx8I .
import org.rut.util.algorithm.support.QuickSort; 2<i!{;u$qL
import org.rut.util.algorithm.support.SelectionSort; HJ9Kz^TnC
import org.rut.util.algorithm.support.ShellSort; t_o['F
m4**~xfC
/** bp* ^z,w
* @author treeroot \d6C%S!
* @since 2006-2-2 +[M6X} TQ
* @version 1.0 [A~y%bI"
*/ i`(XLi}k
public class SortUtil { -)w@f~Q
public final static int INSERT = 1; =m!-m\B/
public final static int BUBBLE = 2; N:S/SZI
public final static int SELECTION = 3; |z9*GY6RU
public final static int SHELL = 4; ZGBd%RWjG_
public final static int QUICK = 5; /kE6@
public final static int IMPROVED_QUICK = 6; M||+qd W!
public final static int MERGE = 7; *{YlN}vA
public final static int IMPROVED_MERGE = 8; Bc(Y(X$PK
public final static int HEAP = 9; 0]'7_vDs|
/z4$gb7Y
public static void sort(int[] data) { WYHQ?
sort(data, IMPROVED_QUICK); X.OD`.!>
} q8FTi^=Kb
private static String[] name={ ? E1<!~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T5R-B=YWu
}; MDnKX?Y
v_<rNc,z-s
private static Sort[] impl=new Sort[]{ 6^V=?~a&z
new InsertSort(), pM+ AjPr
new BubbleSort(), 2a-w% (K
new SelectionSort(), |nc@"OJ
new ShellSort(), ]_Vx{oT7
new QuickSort(), Vp#JS3Y
new ImprovedQuickSort(), y<?kzt
new MergeSort(), 0g +7uGp:
new ImprovedMergeSort(), U\ ig:
new HeapSort() -?H#LUk
}; &b.=M>\9Q
?ME6+Z\
public static String toString(int algorithm){ [glLre^
return name[algorithm-1]; 35A|BD)q
} ?8I?'\F;
zkt+7,vI
public static void sort(int[] data, int algorithm) { 8LyD7P1\
impl[algorithm-1].sort(data); R]vV*
} KxI&G%z
; ^*}#Xd
public static interface Sort { y0{u<"t%w
public void sort(int[] data); )fFb_U
} :yL] ;J
Z 6t56"u
public static void swap(int[] data, int i, int j) { "fQ~uzg="
int temp = data; ({ 8-*
data = data[j]; Za/-i"U
data[j] = temp; 'vVQg
} bENdMH";
} bZ?v-fn\D,