[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; o4OB xHKy
} *]}F=dtR k
int i1=l; @2mWNYHR*>
int i2=mid+1; rA^=;?7Q
for(int cur=l;cur<=r;cur++){ f$9|qfW'$
if(i1==mid+1) +>%51#2.Q
data[cur]=temp[i2++]; rqnxRq
else if(i2>r) +v'2s@e` #
data[cur]=temp[i1++]; =v'Aub
else if(temp[i1] data[cur]=temp[i1++]; 4[&&E7]EX
else N8k=c3|
data[cur]=temp[i2++]; 5UOqS#"0
} 2b,edJVt?
} dA E85
)q.ZzijG/
} 8 R7w$3pp\
dh.{lvlX|
改进后的归并排序: jl]3B
/I1n${{5
package org.rut.util.algorithm.support; /Oi(5?Jn
5`$!s17
import org.rut.util.algorithm.SortUtil; XA(.O|VZ
D(TG)X?
/** N{ $?u
* @author treeroot p|NY.N
* @since 2006-2-2 *DXX*9 0
* @version 1.0 ?B$L'i[l
*/ F6{/iF
public class ImprovedMergeSort implements SortUtil.Sort { I{ki))F
= Ezg3$%-
private static final int THRESHOLD = 10; $tI<MZ&Z
J]w3iYK
/* =tY%`e
* (non-Javadoc) lkly2|wA
* T31F8K3x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a7uL{*ZR
*/ hoM%|,0
public void sort(int[] data) { 3 {hUp81>
int[] temp=new int[data.length]; Fw{68ggk
mergeSort(data,temp,0,data.length-1); Yk)fBPHr
} 8DMqjt3B
$G6kS@A
private void mergeSort(int[] data, int[] temp, int l, int r) { k@s<*C
int i, j, k; ixK9/5T
int mid = (l + r) / 2; 08{^Ksg
if (l == r) -;ra(L`
return; r}sO},i
if ((mid - l) >= THRESHOLD) c0HPS9N\
mergeSort(data, temp, l, mid); tCoE4Ed
else p&u\gSo
insertSort(data, l, mid - l + 1); =cb!2%?}
if ((r - mid) > THRESHOLD) 5O]ZX3z>
mergeSort(data, temp, mid + 1, r); rBU)@IpDG
else .qKfhHJ
insertSort(data, mid + 1, r - mid); o8H\l\(
98| v.d
for (i = l; i <= mid; i++) { FGie*t
temp = data; >R_m@$`
} \ykA7Y%
for (j = 1; j <= r - mid; j++) { 6d6Dk>(V
temp[r - j + 1] = data[j + mid]; Q4*{+$A
} &/2+'wCp5
int a = temp[l]; "L`BuAB
int b = temp[r]; {O).!
for (i = l, j = r, k = l; k <= r; k++) { !fd>wvJ,:
if (a < b) { 0VNpd~G$
data[k] = temp[i++]; gR gB= C{
a = temp; D5({&.X[-
} else { #8 ^b]
data[k] = temp[j--]; -sdzA6dp
b = temp[j]; Gd`7Tf)'
} YlT&.G
} b/JjA
} e6H}L:;
4p+Veo6B
/** i%F2^R@!q/
* @param data v@ qDR|?^
* @param l 1zG6^U
* @param i ?(Tin80=r
*/ =./PY10'
private void insertSort(int[] data, int start, int len) { y`5 ?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JUj.:n2e
} (CH6Q]Wi_!
} yiXb<g+B
} .iP>?9$f"
} @Q{:m)\
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堆排序： 1{]S[\F]
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package org.rut.util.algorithm.support; s]`6uyW"
2M\7j
import org.rut.util.algorithm.SortUtil; #`=>Mza
6/Yo0D>M$
/** 4+nZ4a>LH?
* @author treeroot $Q}L*4?]
* @since 2006-2-2 p,|)qr:M
* @version 1.0 R/fE@d2~In
*/ u rQvJ
public class HeapSort implements SortUtil.Sort{ F7w\ctUP
6(t'B!x
/* (non-Javadoc) CS*lk!C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [`E_/95
*/ bG*l_
public void sort(int[] data) { ?/5<}W#7}
MaxHeap h=new MaxHeap(); xluAjOQ6
h.init(data); GUM-|[~
for(int i=0;i h.remove(); J#4pA{01w
System.arraycopy(h.queue,1,data,0,data.length); \I/"W#\SJo
} [+CFQf>
{R[V
private static class MaxHeap{ K4E2W9h
#lSGH 5Fp?
void init(int[] data){ >gq=W5vN(
this.queue=new int[data.length+1]; 8'zfq ]g
for(int i=0;i queue[++size]=data; &U=_:]/
fixUp(size); #nft{AN
} hCc%d$wVk
} x*tCm8`{
.YH#+T'
private int size=0; =w8 0y'
w)qmq
private int[] queue; K.&6c,P]
6Fk[wH7
public int get() { sAs`O@
return queue[1]; w8cnSO
} U8HuqFC
bO6cv{>x
public void remove() { qJK9C`T%
SortUtil.swap(queue,1,size--); S:xs[b.ZZ
fixDown(1); e.(d?/!F_
} ygm6(+
file://fixdown n}1hmAhZ
private void fixDown(int k) { qh&KNJ>1
int j; +!`$(
while ((j = k << 1) <= size) { Ln+ k_
if (j < size %26amp;%26amp; queue[j] j++; *!Gb_!98
if (queue[k]>queue[j]) file://不用交换 ~R=p[h)
break; Eg&Q,dH[
SortUtil.swap(queue,j,k); 4\ )WMP
k = j; MIZ!+[At
} [xGL0Z%)t
} e$Y7V
private void fixUp(int k) { RLLL=?W@
while (k > 1) { tpeMq-
int j = k >> 1; DAtAc(05)
if (queue[j]>queue[k]) wa&:86~l?
break; -cZuP7oA
SortUtil.swap(queue,j,k); /Jc^XWf
k = j; B=X_c5
} V1G5Kph
} ; +Ie<oW
@8:c3(!
} =KnHa.%
Q'ib7R;V,
} Zw/??Tq b
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SortUtil： L+lye Ir'
AGVipI #
package org.rut.util.algorithm; aK,\e/Oo
xs"\c7pC
import org.rut.util.algorithm.support.BubbleSort; $SniQ
import org.rut.util.algorithm.support.HeapSort; @}+B%R
import org.rut.util.algorithm.support.ImprovedMergeSort; -wNhbV2
import org.rut.util.algorithm.support.ImprovedQuickSort; ]i `~J
import org.rut.util.algorithm.support.InsertSort; ,s@S`KS0
import org.rut.util.algorithm.support.MergeSort; chE}`I?
import org.rut.util.algorithm.support.QuickSort; P;&U3i
import org.rut.util.algorithm.support.SelectionSort; %F;uW[4r
import org.rut.util.algorithm.support.ShellSort; SokU9n!
3rX8H`R
/** ,>TDxI;
* @author treeroot `sRys oW
* @since 2006-2-2 Q2@yUDd!
* @version 1.0 0d`lugf
*/ aKRnj!4z
public class SortUtil { Pb@$RAU63
public final static int INSERT = 1; N$ 2Iz
public final static int BUBBLE = 2; vDc&m
public final static int SELECTION = 3; [{ A5BE -
public final static int SHELL = 4; IY2f$YV
public final static int QUICK = 5; 1gYvp9Ma
public final static int IMPROVED_QUICK = 6; :ZM=P3QZ
public final static int MERGE = 7; @Hp=xC9V
public final static int IMPROVED_MERGE = 8; +J}h
public final static int HEAP = 9; wG22ffaki
oOQ0f |MGp
public static void sort(int[] data) { ]ddL'>$c$
sort(data, IMPROVED_QUICK); L'>0E(D
} 0J= $ A
private static String[] name={ BT5~MYBl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kh>i#9Ie
}; '}P$hP_d
R_:-Z.
private static Sort[] impl=new Sort[]{ h#|Ac>fz
new InsertSort(), a-5#8
new BubbleSort(), gkx<<)y l
new SelectionSort(), -N2m|%B
new ShellSort(), -PiZvge
new QuickSort(), %9t=Iu*
new ImprovedQuickSort(), VZA>ErB
new MergeSort(), H.2aoZ-w
new ImprovedMergeSort(), 6~8dMy;w
new HeapSort() k~$}&O
}; }iB>3|\
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public static String toString(int algorithm){ ` B+Pl6l)F
return name[algorithm-1]; Pj*"2 LBW#
} -9"[/
piPV&ytI
public static void sort(int[] data, int algorithm) { Jqt|'G3
impl[algorithm-1].sort(data); 8.' THLI
} v%Su#xq/
NbhQ-
public static interface Sort { 6uWPIM;
public void sort(int[] data); #j"N5e}U
} i$'#7U
ogE|8`Tq^
public static void swap(int[] data, int i, int j) { Mj |"+(
int temp = data; :DBJ2n
data = data[j]; %TQ5#{Y
data[j] = temp; sH)40QmO{
} ]LSlo593
} 0 9*?'^s4