[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; hzsQK_;S
} 2iG+Ek-?"
int i1=l; )X0=z1$
int i2=mid+1; uu.X>agg
for(int cur=l;cur<=r;cur++){ '4 *0Pw
if(i1==mid+1) _y~6b{T
data[cur]=temp[i2++]; L5bq\
else if(i2>r) SBreA-2
data[cur]=temp[i1++]; h mRmU{(Y
else if(temp[i1] data[cur]=temp[i1++]; x/DV>Nfn
else p^pd7)sBr
data[cur]=temp[i2++]; M0w Uis:`
} = LNU%0m
} e,JBz~CK*w
l+9RPJD/:
} ZAr6RRv ^
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改进后的归并排序: Sb[>R(0:
+MX~1RU+
package org.rut.util.algorithm.support; zR<{z
)#m{"rk[x,
import org.rut.util.algorithm.SortUtil; I?'*vAW<
8\rca:cF
/** #yochxF_
* @author treeroot ,D;8~llM
* @since 2006-2-2 \}$|Uo$O
* @version 1.0 dPEDsG0$a
*/ 5p#0K@`n/
public class ImprovedMergeSort implements SortUtil.Sort { I{89chi
q`1tUd4G
private static final int THRESHOLD = 10; #kv9$
8g0 #WV
/* 6TW<,SM
* (non-Javadoc) ]`$6=)_X
* IU8zidn&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :^]Po$fl
*/ $5i\D rs
public void sort(int[] data) { ~^2w)-N
int[] temp=new int[data.length]; ,/?J!W@m
mergeSort(data,temp,0,data.length-1); oJTEN}fL
} Ak?9a_f
a fa\6]m
private void mergeSort(int[] data, int[] temp, int l, int r) { =FzmifTc
int i, j, k; 8xLQ" l+"
int mid = (l + r) / 2; *|y'%y
if (l == r) ww{k_'RRJ
return; z:-{Y2F
if ((mid - l) >= THRESHOLD) Xex7Lr&
mergeSort(data, temp, l, mid); X%YZQc9
else CH4Nz'X2
insertSort(data, l, mid - l + 1); 6>WkisxG
if ((r - mid) > THRESHOLD) jWUrw
mergeSort(data, temp, mid + 1, r); 9K&$8aD
else ^UvL1+
insertSort(data, mid + 1, r - mid); 0XA\Ag\`G
!f/K:CK|
for (i = l; i <= mid; i++) { vc: kY
temp = data; eQ'E`S_d
} u.2X"
for (j = 1; j <= r - mid; j++) { k{f1q>gd
temp[r - j + 1] = data[j + mid]; f!+d*9
} x<l 5wh
int a = temp[l]; WfO EI1
int b = temp[r]; z -?\b^
for (i = l, j = r, k = l; k <= r; k++) { ^VYR}1Mw
if (a < b) { cIO/8D#zU
data[k] = temp[i++]; }@bp v
a = temp; %g7j7$c
} else { 16Qu{K
data[k] = temp[j--]; bSIY|/d+
b = temp[j]; N6[Z*5efR
} 'gN[LERT
} tV=Qt[|@
} Aa9l-:R
| d*<4-:
/** $(62j0mS>
* @param data @{IX do
* @param l <2(X?,N5BD
* @param i Xn"#Zy_
*/ #bd=G(o~6
private void insertSort(int[] data, int start, int len) { Jj]<SWh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l3u[
} $~8gh>`]
} CZzt=9
} dU-:#QV6
} QHv]7&^rlj
qg j;E=7
堆排序： S8v,'Cc
^X#)'\T
package org.rut.util.algorithm.support; :30daKo
w8+phN(-M
import org.rut.util.algorithm.SortUtil; d*u3]&?x&f
%;wDB2k*
/** z/j*zU `
* @author treeroot /*g0M2+OZo
* @since 2006-2-2 `V/kM0A5
* @version 1.0 %Ok#~>c
*/ 7 :\J2$P
public class HeapSort implements SortUtil.Sort{ pp|$y\ZzB
6U).vg<
/* (non-Javadoc) MZ)lNU l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R UCUEo63
*/ =?CIC%6m
public void sort(int[] data) { .P8m%$'N
MaxHeap h=new MaxHeap(); k'X"jon
h.init(data); Oh}52=
for(int i=0;i h.remove(); }G(#jOYk
System.arraycopy(h.queue,1,data,0,data.length); `$"{-
} un\o&0}
^d>m`*px
private static class MaxHeap{ $m)eO8S+
qW3XA$g|j'
void init(int[] data){ +^J&x>5
this.queue=new int[data.length+1]; `_DA!
for(int i=0;i queue[++size]=data; \HD:#a
fixUp(size); Uvk:
} "wVisL2+.
} )[99SM
2L<1]:I
private int size=0; ,wr5DQ
ZHRMW'Ne
private int[] queue; 3Q&@l49q
z>W?\[E<2
public int get() { #Hy9;Q
return queue[1]; f3;[ZS
} -R9{Ak
UnDX .W*2
public void remove() { ;qzn_W
SortUtil.swap(queue,1,size--); e9\_H=t+
fixDown(1); YPs9Pqkn
} :S`12*_g"
file://fixdown {_>XsB
private void fixDown(int k) { p>U= Jg
int j; 87pu\(,'
while ((j = k << 1) <= size) { 7iy2V;}
if (j < size %26amp;%26amp; queue[j] j++; Us[F@
if (queue[k]>queue[j]) file://不用交换 _or_Vw!
break; g6gwNC:aF
SortUtil.swap(queue,j,k); {#t7lV'4
k = j; t.!?"kP"c
} c*w0Jz>@.7
} Nn0j}ZI)1
private void fixUp(int k) { }V/iU_)
while (k > 1) { ~Y1nU-
int j = k >> 1; a/CY@V-
if (queue[j]>queue[k]) rZAP3)dA
break; 9G1ZW=83
SortUtil.swap(queue,j,k); P(\x. d:
k = j; vqF=kB"P
} F.Bij8\
} }L`Z<h*H
&G-dxET]
} $;";i:H`
O*F= xG
} 'K23oQwDB
k/Urz*O
SortUtil： FrRUAoFO
A(XX2f!i
package org.rut.util.algorithm; }Oe4wEYN)
-g"Wi@Qr
import org.rut.util.algorithm.support.BubbleSort; B$q5/L$}
import org.rut.util.algorithm.support.HeapSort; 1n)YCSA
import org.rut.util.algorithm.support.ImprovedMergeSort; Bi/E{k,
import org.rut.util.algorithm.support.ImprovedQuickSort; tHvP0RxM
import org.rut.util.algorithm.support.InsertSort; )*}?EI4.
import org.rut.util.algorithm.support.MergeSort; |@B|o-
import org.rut.util.algorithm.support.QuickSort; V2yX;u
import org.rut.util.algorithm.support.SelectionSort; G[d]t$f=
import org.rut.util.algorithm.support.ShellSort; T7Y+ WfYh
$|@-u0sv
/** V\c`O
* @author treeroot IUG}Q7w5
* @since 2006-2-2 X2<fS~m
* @version 1.0 ;+3@S`2r
*/ /*6[Itm_h
public class SortUtil { L8pKVr
public final static int INSERT = 1; |*~SR.[`
public final static int BUBBLE = 2; (76tYt~I=
public final static int SELECTION = 3; nGDY::nUE
public final static int SHELL = 4; &`g^b^i
public final static int QUICK = 5; H-% B<7
public final static int IMPROVED_QUICK = 6; WxJaE;`Ige
public final static int MERGE = 7; L'e|D=y
public final static int IMPROVED_MERGE = 8; Nah\4-75&
public final static int HEAP = 9; r0<zy_d'
i"^ yy+
public static void sort(int[] data) { uesIkJ^Q[
sort(data, IMPROVED_QUICK); j3R}]F'C*
} f?QP(+M5.
private static String[] name={ Tkj F/zv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /mn'9=ks
}; p8iKZI]g
Q0XSQOl
private static Sort[] impl=new Sort[]{ xd`\Ai
new InsertSort(), 7<*g'6JG[
new BubbleSort(), |lIgvHgg
new SelectionSort(), NiVZ=wEp,
new ShellSort(), 5z.Y}
new QuickSort(), /RF&@NJE5
new ImprovedQuickSort(), yx<-M
new MergeSort(), Gg^gK*D
new ImprovedMergeSort(), pe!"!xJE
new HeapSort() B?d+^sz]
}; ;Yt'$D*CP
`@&WELFv{
public static String toString(int algorithm){ GCrsf
return name[algorithm-1]; C)cuy7<
} _]< Tv3]RK
<. V*]g/;
public static void sort(int[] data, int algorithm) { ~T=a]V
impl[algorithm-1].sort(data); \O*W/9 +
} 7#PQ1UWl
(ul_bA+
public static interface Sort { %y+v0.aWH+
public void sort(int[] data); bc6|]kB:
} &'m&'wDt:
\XbCJJP
public static void swap(int[] data, int i, int j) { pWeD,!f
int temp = data; MZ^(BOe_
data = data[j]; ZQsVSz( 1
data[j] = temp; Bl+PJ 0
} m*14n_m'
} o#-^Lg&