[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; eL-92]]e
} [vIO
int i1=l; s]=kD
int i2=mid+1; 5Pv>`E2^
for(int cur=l;cur<=r;cur++){ b\;QR?16R
if(i1==mid+1) 9N u;0
data[cur]=temp[i2++]; I:Z38xz-[
else if(i2>r) Xv'64Nc!;
data[cur]=temp[i1++]; sb8SG_c.
else if(temp[i1] data[cur]=temp[i1++]; @o>2:D1G
else %Cm4a49FNi
data[cur]=temp[i2++]; NP|U |zn
} i44KTC"sB
} SUvHLOA
`#9ZP
} 6:h!gY
a:P% r
改进后的归并排序: vO"AJ`_
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package org.rut.util.algorithm.support; &uk?1Z#j
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import org.rut.util.algorithm.SortUtil; rKR<R(=!=
0WYVt"|;}c
/** <hS >L1ZSr
* @author treeroot \7Zk[)!FL
* @since 2006-2-2 YJr@4!j*
* @version 1.0 y+X%qTB
*/ hp[8.Z$7
public class ImprovedMergeSort implements SortUtil.Sort { @dO~0dF
BeP0lZ
private static final int THRESHOLD = 10; JqFFI:Q5a
R#Ss_y
/* >5XE*9
* (non-Javadoc) _D z4}:9
* VE{t]>*-u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /A{znE
*/ ]Ub?Wo7F?
public void sort(int[] data) { ="Dmfy7
int[] temp=new int[data.length]; Is%-r.i
mergeSort(data,temp,0,data.length-1); $'kIo*cZ
} [?]s((A~B
6``!DMDt/P
private void mergeSort(int[] data, int[] temp, int l, int r) { "z7.i{
int i, j, k; G$`/86A)
int mid = (l + r) / 2; _%"/I96'
if (l == r) LD#]"k
return; ~ dmyS?Or
if ((mid - l) >= THRESHOLD) E+[K?W5
mergeSort(data, temp, l, mid); 1oodw!hW
else X@jml$;$
insertSort(data, l, mid - l + 1); Z wIsEJz
if ((r - mid) > THRESHOLD) VxaJ[s3PQ&
mergeSort(data, temp, mid + 1, r); i wK,XnIR
else rN_\tulOF
insertSort(data, mid + 1, r - mid); QBDi;Xzb+
uiO8F*,!&r
for (i = l; i <= mid; i++) { CCQ<.iCU
temp = data; c1!h;(&
} -pyTzC$HO
for (j = 1; j <= r - mid; j++) { ~?S/0]?c
temp[r - j + 1] = data[j + mid]; vvdC.4O
} L?<V KT
int a = temp[l]; XG_lyx%:E
int b = temp[r]; y\V!OY@
for (i = l, j = r, k = l; k <= r; k++) { JZ80|-c
if (a < b) { >`\~=ivrD
data[k] = temp[i++]; WVp14Z?k
a = temp; 6YYZ S2
} else { O`Nzn~),x
data[k] = temp[j--]; Oz]iHe
b = temp[j]; +qDudGI
} I`zn#U'
} n$B=Vt,
} .kGg}
D+#QQH
/** U(.Ln@sq
* @param data )0~zL} )?
* @param l '+5*ajP<
* @param i 3Sf<oYF
*/ `A3"*,|z
private void insertSort(int[] data, int start, int len) { PzNk:O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NKh"x&R
} E<D45C{DP
} >>FE?@
} 9;sebqC?
} @aWvN;v
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堆排序： @e3O=_m-
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package org.rut.util.algorithm.support; ##EMJi
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import org.rut.util.algorithm.SortUtil; ~UEft
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/** gb(a`
* @author treeroot 9}:%CpD^~I
* @since 2006-2-2 MG<F.u
* @version 1.0 |ILj}4ZA7
*/ yiWBIJ2Wu9
public class HeapSort implements SortUtil.Sort{ I?EtU/AD
(O"Wa
/* (non-Javadoc) R>BnUIu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [;
*/ n&pi
public void sort(int[] data) { Xg_M{t
MaxHeap h=new MaxHeap(); {OXKXRCa
h.init(data); vB hpD
for(int i=0;i h.remove(); U4w^eWzP
System.arraycopy(h.queue,1,data,0,data.length); XFUlV;ek
} iqRk\yq<
]O,;t>
private static class MaxHeap{ /2Y t\=S=
xRuAt/aC
void init(int[] data){ 2g$PEwXe
this.queue=new int[data.length+1]; /xUTm=w7u
for(int i=0;i queue[++size]=data; xKi: 2
fixUp(size); @!1o +x
} ds}:t.3}6
} \7n ;c
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private int size=0; ]+@@{?0
Oe:+%p
private int[] queue; 7O',X Y
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public int get() { P-[6'mw`
return queue[1]; V+G.TI P
} C@3a/<6m
ixm-wZI
public void remove() { =4+Wx8ZeW
SortUtil.swap(queue,1,size--); $Y& 8@/L
fixDown(1); 2uujA* ^
} (v+nn1,
file://fixdown I.As{0cc
private void fixDown(int k) { xn|M]E1)
int j; MKMWHGN
while ((j = k << 1) <= size) { BC.~wNz6
if (j < size %26amp;%26amp; queue[j] j++; A/:^l%y,GZ
if (queue[k]>queue[j]) file://不用交换 =]i[gs)B
break; %P@V7n
SortUtil.swap(queue,j,k); *|n-Hr
k = j; !:"$1kh1("
} WD.td
} hilgl<UF
private void fixUp(int k) { wyWe2d
while (k > 1) { /&1FgSARK
int j = k >> 1; k;BXt:jDq
if (queue[j]>queue[k]) Z'=:Bo{
break; b`:n i
SortUtil.swap(queue,j,k); OynQlQD/Eu
k = j; ($s%5|
} mcO/V-\5'
} .Y`;{)
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} ,, S]_S
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} <KB V
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SortUtil： y(81| c#
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package org.rut.util.algorithm; L F<{/c9,
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import org.rut.util.algorithm.support.BubbleSort; ' 5tk0A
import org.rut.util.algorithm.support.HeapSort; ^W8kt
import org.rut.util.algorithm.support.ImprovedMergeSort; WK$d<:"
import org.rut.util.algorithm.support.ImprovedQuickSort; 5ub|r0&M
import org.rut.util.algorithm.support.InsertSort; 4zo^ b0v
import org.rut.util.algorithm.support.MergeSort; EjY8g@M;t
import org.rut.util.algorithm.support.QuickSort; )O}q{4,}
import org.rut.util.algorithm.support.SelectionSort; #LU<v
import org.rut.util.algorithm.support.ShellSort; zvEofK
cJ^{iOQ+
/** FUTD/y]Lu
* @author treeroot $tm%=g^
* @since 2006-2-2 LZR x>q^
* @version 1.0 fGtYvl O-5
*/ &AUtUp kOo
public class SortUtil { M0) q
public final static int INSERT = 1; T5<851rH
public final static int BUBBLE = 2; 'GyO
public final static int SELECTION = 3; PAYS~MnV@3
public final static int SHELL = 4; ctk~}(1#
public final static int QUICK = 5; F x4s)(
public final static int IMPROVED_QUICK = 6; (i2R1HCa
public final static int MERGE = 7; uE'O}Y95
public final static int IMPROVED_MERGE = 8; b@s6jNhVO^
public final static int HEAP = 9; ./l^Iz&0
v^0*{7N'
public static void sort(int[] data) { =%=lq0GF0
sort(data, IMPROVED_QUICK); Vf*Z}'
} or<n[<D-C
private static String[] name={ uCB>".'kM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ahoXQ8c:\}
}; XK+" x!
Vd&&GI(:?^
private static Sort[] impl=new Sort[]{ *r90IS}A$2
new InsertSort(), ~vPR9\e
new BubbleSort(), ' pN[H\Ia
new SelectionSort(), I5%#A/|z
new ShellSort(), ]Y.GU7`
new QuickSort(), C0`Bi:Ze
new ImprovedQuickSort(), zhdS6Gk+
new MergeSort(), 9\ulS2d
new ImprovedMergeSort(), *"qS
new HeapSort() uyqu n@q
}; E3vYVuw
"ZYdJHM
public static String toString(int algorithm){ 3QF/{$65!
return name[algorithm-1]; UFSbu5 j
} c>b!{e@*
&#< M o
public static void sort(int[] data, int algorithm) { ABaK60.O[O
impl[algorithm-1].sort(data); $p;<1+!
} Abc%VRsT
YZdV0-S
public static interface Sort { jY1^I26E
public void sort(int[] data); o|cx?
} UTS.o#d
Z<IN>:l
public static void swap(int[] data, int i, int j) { k}&7!G@T
int temp = data; EA``G8Vn>
data = data[j]; +5i~}Q!
data[j] = temp; T0e- X
} o|V`/sW{
} 5Y4#aq