[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; T\VKNEBo
} xG JX~)
int i1=l; GRK+/1C
int i2=mid+1; /d*0+m8
for(int cur=l;cur<=r;cur++){ F/FUKXxx
if(i1==mid+1) I5l5fx
data[cur]=temp[i2++]; 'a`cK;X9F
else if(i2>r) YQWGv,47\
data[cur]=temp[i1++]; g?.ls{H
else if(temp[i1] data[cur]=temp[i1++]; 3?F*|E_
else XjL)WgQ{i
data[cur]=temp[i2++]; dBKL_'@@}
} pPSmSWD?
} Lj"@JF;c
*"\QR>n
} ]uN}n;`12
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改进后的归并排序: LE!xj 0
Tji G!W8
package org.rut.util.algorithm.support; UMN3.-4K#
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import org.rut.util.algorithm.SortUtil; #d,+87]\=
,iKL 68
/** 18ApHp
* @author treeroot 8LI,'XZ
* @since 2006-2-2 Y[l*>}:w
* @version 1.0 WdEVT,jjh
*/ 7JvBzD42
public class ImprovedMergeSort implements SortUtil.Sort { %l4LX~-:
kcg{z8cd'r
private static final int THRESHOLD = 10; /a}F;^
e5/f%4YX
/* w\o?p.drp=
* (non-Javadoc) )YE3n-~7{
* !2-f%x]tO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _?"P<3/iF
*/ ^=f<WKn
public void sort(int[] data) { WC6yQSnY&
int[] temp=new int[data.length]; Id6H~;
mergeSort(data,temp,0,data.length-1); F7!g+LPc<
} ,Jm2|WKH
-][~_Hd{
private void mergeSort(int[] data, int[] temp, int l, int r) { SvZ~xTit
int i, j, k; eD4D<\*
int mid = (l + r) / 2; ws1io.
if (l == r) l`S2bb6uMR
return; ;L1Q"Hxh
if ((mid - l) >= THRESHOLD) 37OU
mergeSort(data, temp, l, mid); }H^h~E
else dwd5P7
insertSort(data, l, mid - l + 1); <$6r1y*G
if ((r - mid) > THRESHOLD) {kCCpU
mergeSort(data, temp, mid + 1, r); a_jw4"Sb
else |\/`YRg>
insertSort(data, mid + 1, r - mid); s!WGs_1@
BvQMq5&
for (i = l; i <= mid; i++) { 1b^e4
temp = data; _{Q)5ooP
} #0HZ"n
for (j = 1; j <= r - mid; j++) { ST#9auw
temp[r - j + 1] = data[j + mid]; ,X+LJe$
} _yH{LUIj
int a = temp[l]; =E6ND8l@2
int b = temp[r]; +,7nsWV
for (i = l, j = r, k = l; k <= r; k++) { yx0wR
if (a < b) { PIk2mX/D_6
data[k] = temp[i++]; in-|",O`Z
a = temp; tu5g> qb
} else { " pg5w
data[k] = temp[j--]; > 2)@(f~g
b = temp[j]; 9:DT+^BB
} 3K;V3pJ].
} Db:^Omwo
} 73Zx`00
JWZG)I]r
/** =VC"X?N
* @param data V{jQ=<)@e
* @param l JRti2Mu
* @param i R[#Np`z
*/ z):LF<
private void insertSort(int[] data, int start, int len) { b/[$bZD5o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v2w|?26Lf
} eILdq*
} tQR qQ
} hn`yc7<}(u
} %mqep5n(
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堆排序： wh Hp}r
%#go9H(K
package org.rut.util.algorithm.support; _HMQx_e0YM
k)j6rU
import org.rut.util.algorithm.SortUtil; ={'3j
-!@]z2uU
/** p!oO}gE
* @author treeroot 0P_=Oy"l-
* @since 2006-2-2 /penB[1i
* @version 1.0 7)RDu,fx
*/ \wZ 4enm
public class HeapSort implements SortUtil.Sort{ ~,^pya
V;pRw`
/* (non-Javadoc) 1tZ7%0R\g]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X%C`('"R
*/ 7sX#6`t
public void sort(int[] data) { CMhl*dH
MaxHeap h=new MaxHeap(); *A&A V||q
h.init(data); PF+F^;C
for(int i=0;i h.remove(); wI5(`_l{G
System.arraycopy(h.queue,1,data,0,data.length); ahh&h1q7|
} Oj=g;iY
wZUZ"Y}9
private static class MaxHeap{ $.Ia;YBf
eoj(zY3
void init(int[] data){ D6I-:{ws
this.queue=new int[data.length+1]; m|uVmg!*
for(int i=0;i queue[++size]=data; HfOaJ'+e<
fixUp(size); YD9|2S!G
} 7v']wA r]
} Wq2Bo*[*
~|Nj+A
private int size=0; 2%?Kc]JY9
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private int[] queue; 7+NBcZuG9
@ ^q}.u`
public int get() { WJlJD*3
return queue[1]; 7_9^nDU
} r@t \a+
2tw3 =)
public void remove() { 9]L4`.HM
SortUtil.swap(queue,1,size--); o[aP+O Md
fixDown(1); 9oj#5Hq
} 9GX'+$R]
file://fixdown oA*88c+{f
private void fixDown(int k) { A(D>Zh6o@
int j; u?4d<%5R!
while ((j = k << 1) <= size) { @?n~v^
if (j < size %26amp;%26amp; queue[j] j++; r1&eA%eh
if (queue[k]>queue[j]) file://不用交换 {i<L<Y(3
break; |4C5;"Pc
SortUtil.swap(queue,j,k); <YM!K8hu$
k = j; P<CPA7K
} %jo,Gv
} 3,"G!0 y.
private void fixUp(int k) { )%JjV(:
while (k > 1) { HIqe~Vc
int j = k >> 1; fKbg?
if (queue[j]>queue[k]) j6d{r\!$4
break; 5yL\@7u`
SortUtil.swap(queue,j,k); 03n+kh
k = j; {^.q6,l
} r,<p#4(>_
} W5uC5C*,l
bXz*g`=;
} _<6E>"*m
`l'Ine11
} QQ/9ZI5
(kVxa8 0
SortUtil： kr\#CW0?
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package org.rut.util.algorithm; I{$TMkh[
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import org.rut.util.algorithm.support.BubbleSort; Ub{7Xk n
import org.rut.util.algorithm.support.HeapSort; Y1;jRIOA
import org.rut.util.algorithm.support.ImprovedMergeSort; {(IHHA>
import org.rut.util.algorithm.support.ImprovedQuickSort; 3V]08
import org.rut.util.algorithm.support.InsertSort; )b~+\xL5J
import org.rut.util.algorithm.support.MergeSort; hZ|8mV
import org.rut.util.algorithm.support.QuickSort; % kaV?j
import org.rut.util.algorithm.support.SelectionSort; M_O)w^ '
import org.rut.util.algorithm.support.ShellSort; ~#dfZa&
{t*CSI
/** $3S`A]xO
* @author treeroot 9T\\hM)k
* @since 2006-2-2 !S'!oinV
* @version 1.0 8{ +KNqz
*/ z:8ieJ)C
public class SortUtil { o?d`o$
public final static int INSERT = 1; L@S1C=-/
public final static int BUBBLE = 2; R].xT-1
public final static int SELECTION = 3; @dn&M9Z
public final static int SHELL = 4; BS2'BS8
public final static int QUICK = 5; 6"9(ce KX
public final static int IMPROVED_QUICK = 6; K}DrJ/s
public final static int MERGE = 7; ,:{+-v(
public final static int IMPROVED_MERGE = 8; mLV0J '
public final static int HEAP = 9; (~NR."s;
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public static void sort(int[] data) { dn&484
sort(data, IMPROVED_QUICK); oT!i}TW?o
} 3fUiYI|&7
private static String[] name={ ~Zw37C9J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !iL6/
}; y[/:?O}g4
<OrQbrWQa
private static Sort[] impl=new Sort[]{ h%5keiA
new InsertSort(), 5S ) N&%
new BubbleSort(), zCS&w ~
new SelectionSort(), F9>"1
new ShellSort(), 4,&f#=Y
new QuickSort(), '(zP;
new ImprovedQuickSort(), 09=w
new MergeSort(), _U o3_us
new ImprovedMergeSort(), ltv~Kh
new HeapSort() ctPT=i60
}; &"=O!t2
/ <+F/R'=O
public static String toString(int algorithm){ }&]T0U`@
return name[algorithm-1]; tlYB'8bJY
} {Q)sR*d
W!|l_/L'
public static void sort(int[] data, int algorithm) { sT,*<^
impl[algorithm-1].sort(data); L=5Y^f'aU
} a{Y8hR
Rl (+TE
public static interface Sort { /2cn`dR,
public void sort(int[] data); }%c0EY'
} &w{z
"$3~):o
public static void swap(int[] data, int i, int j) { B}@CtVWFz
int temp = data; {rzQ[_)EC
data = data[j]; x=N0H
data[j] = temp; TpYdIt9#>
} T#KVN{O
} ~ymSsoD^