[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; [Sr,h0h6
} P<l&0dPO8
int i1=l; A<5ZF27
int i2=mid+1; %\D)u8}
for(int cur=l;cur<=r;cur++){ 9xO#tu]
if(i1==mid+1) ?WF/|/
data[cur]=temp[i2++]; [`{Z}q&
else if(i2>r) mL{B!Q
data[cur]=temp[i1++]; tZ} v%3
else if(temp[i1] data[cur]=temp[i1++]; 6l5:1|8b,!
else ^T ?RK"p
data[cur]=temp[i2++]; ?]Pmxp H}
} }4Tc
} {;N,t]>8M
}Mf!-g
} ^* J2'X38I
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改进后的归并排序: m@"QDMHk.
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package org.rut.util.algorithm.support; B:gjAb}9T
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import org.rut.util.algorithm.SortUtil; &xa(BX%,c
"OQ^U_
/** ZAv,*5&<
* @author treeroot e?7&M
* @since 2006-2-2 |$Xl/)Oq
* @version 1.0 jDy-)2<
*/ MYla OT
public class ImprovedMergeSort implements SortUtil.Sort { S/D^
AWP"b?^G|
private static final int THRESHOLD = 10; #9X70|f
(iL|Sq&}b
/* a^`rtvT
* (non-Javadoc) ]}U*_rM:
* ?Lyxw]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :^kZ.6Q@
*/ P"W2(d
public void sort(int[] data) { { jhr<
int[] temp=new int[data.length]; a4XU?-sUh
mergeSort(data,temp,0,data.length-1); `&D|>tiz
} |2abmuR0
Wn(6,MDUN
private void mergeSort(int[] data, int[] temp, int l, int r) { xL{a
int i, j, k; `}mcEl
int mid = (l + r) / 2; xn5l0'2
if (l == r) Olh<,p+x
return; j}~86JO+Cw
if ((mid - l) >= THRESHOLD) 4*e0 hWp
mergeSort(data, temp, l, mid); l,,>& F
else X!m9lV<
insertSort(data, l, mid - l + 1); jC7&s$>Q"g
if ((r - mid) > THRESHOLD) ; =X P&
mergeSort(data, temp, mid + 1, r); K)\M5id]
else Fl1;;F
insertSort(data, mid + 1, r - mid); 't6V:X
^V#@QPK9
for (i = l; i <= mid; i++) { sIK;x]Q)
temp = data; h\PHKC2
} qeL5D*
for (j = 1; j <= r - mid; j++) { 0 0M@
temp[r - j + 1] = data[j + mid]; ?ON-+u
} V}SBuQp"
int a = temp[l]; H Ge0hl[n
int b = temp[r]; OujCb^Rm
for (i = l, j = r, k = l; k <= r; k++) { p\JfFfC
if (a < b) { p~9vP)74u
data[k] = temp[i++]; %YSu8G_t
a = temp; `~ * @q!
} else { VxXzAeM
data[k] = temp[j--]; US%^#D q
b = temp[j]; N9vP7
} >&p0d0
} 'ul~7h;n
} Wh%ucX&
R8T]2?Q1
/** hWT[L.>k
* @param data ;d'Z|H;
* @param l |"9 #bU
* @param i Xa[?^P
*/ :P@rkT3Qt
private void insertSort(int[] data, int start, int len) { 6p?JAT5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FN%m0"/Z{t
} W@Lu;g.Yc
} ]f_6 '|5A
} 5GPo*Qpl
} Ce")[<:
Vw&HVo
堆排序： HH@qz2w
CBD6bl|A
package org.rut.util.algorithm.support; r,Nq7Txn?
X0M1(BJgGo
import org.rut.util.algorithm.SortUtil; 3neIR@W
K a(J52
/** &2=dNREJ}1
* @author treeroot O=dJi9;`#_
* @since 2006-2-2 Hw-Z
* @version 1.0 f}@jFhr'<
*/ Q]w&N30
public class HeapSort implements SortUtil.Sort{ zKsz*xv6b
Gsc\/4Wx
/* (non-Javadoc) }A:<%N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XFh>U7z.
*/ fz3lV
public void sort(int[] data) { |-CnT:|o
MaxHeap h=new MaxHeap(); \#>T~.Y7K
h.init(data); ]+m/;&0
for(int i=0;i h.remove(); a<A+4uXyD
System.arraycopy(h.queue,1,data,0,data.length); v,\R,{0
} N?m0USu*
jh.@-
private static class MaxHeap{ 60)iw4<wf
~(@ E`s&{
void init(int[] data){ XK5<Tg
this.queue=new int[data.length+1]; ) 9oH,gZ
for(int i=0;i queue[++size]=data; 1 `7<2w
fixUp(size); S#-tOjU*
} $\"9<o|h
} k,uK6$Z
d.2mT?`#
private int size=0; /2RajsK
hG_?8:W8HT
private int[] queue; Na\WZSu'"
7lo|dg80
public int get() { @y/wEBb
return queue[1]; thqS*I'#g
} x+@&(NMP5
B<~U3b
public void remove() { :SsUdIX;P
SortUtil.swap(queue,1,size--); o1/lZm{\~n
fixDown(1); kpI{KISQu
} 1H,g=Y4f%
file://fixdown D)brPMS:o
private void fixDown(int k) { )*5G">))p
int j; /S\cU`ZVe
while ((j = k << 1) <= size) { Y= 7%+WyD
if (j < size %26amp;%26amp; queue[j] j++; cM_Fp
if (queue[k]>queue[j]) file://不用交换 X{g%kf,D=
break; pfd#N[c
SortUtil.swap(queue,j,k); ,b$2=JO'f
k = j; 5`<eKwls
} ItX5JV)
} `PL[lP-<
private void fixUp(int k) { 2Nj9U#A
while (k > 1) { RAjkH`
int j = k >> 1; v[lnw} =m9
if (queue[j]>queue[k]) F#{gfh
break; e0;
SortUtil.swap(queue,j,k); w&BGJYI
k = j; - /c7nF
} z\/53Sy<
} <fdPLw;@e4
K"2|[5
} ?_`0G/xl
>x[`;O4
} 7);:ZpDv%L
lr2rQo>
SortUtil： ^\:2}4Uj_
t?^9HP1b_
package org.rut.util.algorithm; A7P`lJgv
_B,_4}
import org.rut.util.algorithm.support.BubbleSort; 'xFYUU]#T^
import org.rut.util.algorithm.support.HeapSort; }xFi& <
import org.rut.util.algorithm.support.ImprovedMergeSort; T[Pa/j{
import org.rut.util.algorithm.support.ImprovedQuickSort; \O7J=6fn
import org.rut.util.algorithm.support.InsertSort; <3hA!$o~
import org.rut.util.algorithm.support.MergeSort; 5A&y]5-Q`
import org.rut.util.algorithm.support.QuickSort; *wi}>_\
import org.rut.util.algorithm.support.SelectionSort; CQODXB^
import org.rut.util.algorithm.support.ShellSort; uG>nV
I"xWw/Ec
/** oJ78jGTnb
* @author treeroot ~DLIzg7p!
* @since 2006-2-2 )qPSD2h
* @version 1.0 v@G4G*x\
*/ %B EC] h
public class SortUtil { {aN(d3c
public final static int INSERT = 1; MY-.t-3
public final static int BUBBLE = 2; ew#T8F[
public final static int SELECTION = 3; hbuZaxo<
public final static int SHELL = 4; R V!o4"\]
public final static int QUICK = 5; 6T^lS^
public final static int IMPROVED_QUICK = 6; JZ`L%
public final static int MERGE = 7; "7?js $
public final static int IMPROVED_MERGE = 8; Kla:e[{
public final static int HEAP = 9; !Y;<:zx5
lVeH+"M?
public static void sort(int[] data) { zj]b&In6;
sort(data, IMPROVED_QUICK); ID8k/t!
} \iMyo
private static String[] name={ |*Ot/TvG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xaXV^ZM3
}; K="I<bK
|l90g|isJ
private static Sort[] impl=new Sort[]{ PI7IBI
new InsertSort(), ) Ypz!
new BubbleSort(), C<he4n.
new SelectionSort(), ?^3B3qqh9
new ShellSort(), XUsy.l/
new QuickSort(), n0.8)=;2
new ImprovedQuickSort(), PN\V[#nS
new MergeSort(), _hoAW8i
new ImprovedMergeSort(), w67xl
new HeapSort() md6*c./Z
}; K<,Y^3]6?
yv${M u
public static String toString(int algorithm){ z\[(g
return name[algorithm-1]; silp<13HN
} 3@X|Gs'_S
uAb 03Q
public static void sort(int[] data, int algorithm) { $i&\\QNn
impl[algorithm-1].sort(data); T` ;k!F46
} L;C|ow^c
s<{GpWT8
public static interface Sort { Orc>.~+f%A
public void sort(int[] data); 9&(.x8d,a
} Fhi5LhWe+.
#! @m y
public static void swap(int[] data, int i, int j) { 4H7Oh*P\j
int temp = data; ~D!ESe*=
data = data[j]; ]1Qi=2'
data[j] = temp; iJ*%dio
} /p[y1
} &u4Ve8#