[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; $l=&
} C)?tf[!_6
int i1=l; Rh,a4n?W
int i2=mid+1; 'o]kOp@q
for(int cur=l;cur<=r;cur++){ @9e}kiW
if(i1==mid+1) ak"W/"2:
data[cur]=temp[i2++]; U0ZPY )7k
else if(i2>r) sJ{J@/5
data[cur]=temp[i1++]; Fxx-2(U
else if(temp[i1] data[cur]=temp[i1++]; PY76;D*`
else pdySip<
data[cur]=temp[i2++]; tu:W1?
} 'D:R]@eK]
} $}8@?>-w
BA6(Owb
} :%4N4| Q
;@FCaj&
改进后的归并排序: ]J^/`gc
{ u %xc"0y
package org.rut.util.algorithm.support; %}}?Y`/W)
x+8%4]u`
import org.rut.util.algorithm.SortUtil; p~3 (nk<+
C7=N`s}
/** ,.z?=]'en
* @author treeroot NA!?.zn
* @since 2006-2-2 eqSCE6r9x
* @version 1.0 qx1+'
*/ ufn%sA
public class ImprovedMergeSort implements SortUtil.Sort { N#p%^GH
CxD=8X9m
private static final int THRESHOLD = 10; ^u:bgwP
_lBHZJ+
/* hlBMRx49
* (non-Javadoc) ,}:}"cl
* *_sSM+S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dlRTxb^Y>u
*/ .x'?&7#(
public void sort(int[] data) { h7kn >q;
int[] temp=new int[data.length]; 3jx/1VV
mergeSort(data,temp,0,data.length-1); Tvl"KVGm
} 7DPxz'7):
:!/ (N
private void mergeSort(int[] data, int[] temp, int l, int r) { U8a5rF><
int i, j, k; qs>&Xn
int mid = (l + r) / 2; GDQQ4-|O
if (l == r) )W/_2Q.
return; Gzc`5n{"
if ((mid - l) >= THRESHOLD) V<ii
mergeSort(data, temp, l, mid); ^6QzaC3
else `b KJ
insertSort(data, l, mid - l + 1); KU^|T2s%
if ((r - mid) > THRESHOLD) :{s0tw>Z
mergeSort(data, temp, mid + 1, r); [4r<WvUaM
else sV;q(,oru
insertSort(data, mid + 1, r - mid); GmH`ipi
5c0$oyl)M
for (i = l; i <= mid; i++) { 5VSc5*[
temp = data; rpUTn!*u/
} e^k)756
for (j = 1; j <= r - mid; j++) { |pZ:5ta#
temp[r - j + 1] = data[j + mid]; ny}_^3
} :7?n)=Tx
int a = temp[l]; H5(:1
int b = temp[r]; ](^FGz
for (i = l, j = r, k = l; k <= r; k++) { &S39SV
if (a < b) { I23"DBR3
data[k] = temp[i++]; ~(`&hYE
a = temp; NQcNY=
} else { d*dPi^JjC
data[k] = temp[j--]; 7l4}b^>/`
b = temp[j]; n)PqA*
} q)3QmA~
} T>|Y_3YO_a
} OHv4Yy]$B
zeD=-3
/** r72zWpF!Ss
* @param data b%].D(qBy
* @param l 7ufTmz#j<
* @param i SB`xr!~A]
*/ Y,?kS dS
private void insertSort(int[] data, int start, int len) { d~q7!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @<yYMo7
} .I]EP-
} %<|cWYM="z
} s_3a#I
} !p Q*m`Xo
9&zQ5L>
堆排序： |-TxX:O-
|S]T,`7u
package org.rut.util.algorithm.support; IdCE<Oj\
R[l~E![!j
import org.rut.util.algorithm.SortUtil; `neo.]
0J6* U[
/** X o[GD`t
* @author treeroot &79F Uac
* @since 2006-2-2 >DAi-`e
* @version 1.0 ]GDjR'[z
*/ s@p:XO
public class HeapSort implements SortUtil.Sort{ {I/t3.R`
"jf_xZ$H-
/* (non-Javadoc) to?={@$]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3bT?4
*/ V`rxjv}!
public void sort(int[] data) { o1k+dJUd
MaxHeap h=new MaxHeap(); .hjN*4RY
h.init(data); K1w:JA6(
for(int i=0;i h.remove(); L) UCVm
System.arraycopy(h.queue,1,data,0,data.length); = toU?:.
} 2J (nJT"
8Y_lQfJa
private static class MaxHeap{ ts;^,|h
B%5"B} nG
void init(int[] data){ )2 b-3lz
this.queue=new int[data.length+1]; So= BcX-
for(int i=0;i queue[++size]=data; vGOO"r(xL
fixUp(size); X<H{
} !b$]D?=}
} I|Mw*2U
qfRrX"
private int size=0; .*Z#;3
.EC~o
private int[] queue; Y?-Ef sK
Cq[Hh#q
public int get() { 4ves|pLET
return queue[1]; 1@9M[_<n5
} X`fm5y
tBETNt7
public void remove() { 4y!GFhMh
SortUtil.swap(queue,1,size--); gGx<k3W^
fixDown(1); ND/oKM+?
} h gu\~}kD
file://fixdown wYDdy gS
private void fixDown(int k) { Lt i2KY}/%
int j; {Es1bO
while ((j = k << 1) <= size) { >U(E \`9D
if (j < size %26amp;%26amp; queue[j] j++; !%B-y9\
if (queue[k]>queue[j]) file://不用交换 oi8M6l
break; ge1U1o
SortUtil.swap(queue,j,k); (hh^?
k = j; AmQsay#I_
} P<;Puww/
} EKS?3z%!
private void fixUp(int k) { iBmvy7S?
while (k > 1) { 8"A0@fNz
int j = k >> 1; +11oVW
if (queue[j]>queue[k]) KUC%Da3
break; "rVM23@ tq
SortUtil.swap(queue,j,k); Asy2jw\V
k = j; D={$l'y9p
} ],vid1E
} 2`> (LH
w ~^{V4V
} orbz`IQc
JSx[V<7m
} 93ggCOaYA
c[$i)\0
SortUtil： )|#ExyRO
cQsSJBZ[v5
package org.rut.util.algorithm; ]:m4~0^#-(
MP.ye|i4Q
import org.rut.util.algorithm.support.BubbleSort; Kjpsz];
import org.rut.util.algorithm.support.HeapSort; lTVz'ys
import org.rut.util.algorithm.support.ImprovedMergeSort; D_G]WW8
import org.rut.util.algorithm.support.ImprovedQuickSort; gZ-:4G|J
import org.rut.util.algorithm.support.InsertSort; d[*NDMO
import org.rut.util.algorithm.support.MergeSort; :&LV^A
import org.rut.util.algorithm.support.QuickSort; "ZA`Lp;%w
import org.rut.util.algorithm.support.SelectionSort; _ q AT%.
import org.rut.util.algorithm.support.ShellSort; ~f( #S*Ic
s>[Oe|`
/** =h|7bYLy
* @author treeroot RRzLQ7J
* @since 2006-2-2 t~.^92]s|
* @version 1.0 ad9u;uS
*/ =LEzcq>XO
public class SortUtil { ;bL?uL
public final static int INSERT = 1; s.XxYXR\
public final static int BUBBLE = 2; .y0u"@iF
public final static int SELECTION = 3; Yv2L0bUo:
public final static int SHELL = 4; >h~>7i(A
public final static int QUICK = 5; {hm-0Q
public final static int IMPROVED_QUICK = 6; *~w?@,}
public final static int MERGE = 7; JvaHH!>d/
public final static int IMPROVED_MERGE = 8; ]mjKF\
public final static int HEAP = 9; .'4@Yp{=
A7eYKo q
public static void sort(int[] data) { [?(qhp!
sort(data, IMPROVED_QUICK); #a'CoJs
} }WF6w+
private static String[] name={ =vDpm,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l{VJaZ $M
}; 07:h4beT
#-{ljjMQI
private static Sort[] impl=new Sort[]{ 3$BO=hI/-
new InsertSort(), jS5K:yx<
new BubbleSort(), 7|Iq4@IT
new SelectionSort(), E.-2 /'i
new ShellSort(), )}vUYTU1
new QuickSort(), NxB/U_j
new ImprovedQuickSort(), ;=@?( n
new MergeSort(), ?%/*F<UVQ
new ImprovedMergeSort(), zy~*~;6tW
new HeapSort() ^K 9jJS9K
}; @V+KL>Qw
Vg mYm~y'
public static String toString(int algorithm){ ,4}s 1J#
return name[algorithm-1]; p%/lP{
} IxY!.d_s|~
7t78=wpLc
public static void sort(int[] data, int algorithm) { wy:euKB~
impl[algorithm-1].sort(data); ?ZkVk=t?
} q^~w:$^U
o[S Mt
public static interface Sort { $N|Spp0
public void sort(int[] data); RLGIST`
} zE7)4!
qQS&K%F
public static void swap(int[] data, int i, int j) { Tc|+:Usy
int temp = data; L:jv%;DM
data = data[j]; F$9+WS`c
data[j] = temp; 2%MS$Fto
} |Z$)t%'
} "IWL& cH3