[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; Y( D d7`c
} T"8>6a@}E
int i1=l; &=t$ AIu
int i2=mid+1; BI,K?D&W-
for(int cur=l;cur<=r;cur++){ &RpQ2*4n
if(i1==mid+1) %^gT.DsX-
data[cur]=temp[i2++]; L=4?vs
else if(i2>r) ?nj _gL
data[cur]=temp[i1++]; 18V*Cu
else if(temp[i1] data[cur]=temp[i1++]; 1wqCoDgkp
else 8uS1HE\%
data[cur]=temp[i2++]; NzNAhlXj3
} K'N\"Y?>
} Yy>%dL
\f0I:%-
} duV|'ntr
~>xn9vb=
改进后的归并排序: @+B .<@V
g|e^}voRM
package org.rut.util.algorithm.support; #qm<4]91
cd*y{Wt
import org.rut.util.algorithm.SortUtil; $*8c0.{U
F)5QpDmqb
/** 9j$ OU@N 8
* @author treeroot H>;km$b +
* @since 2006-2-2 u=#LY$
* @version 1.0 !bT0kP$3}
*/ v?n`kw
public class ImprovedMergeSort implements SortUtil.Sort { !);}zW!
SU2(XP]5
private static final int THRESHOLD = 10; M+)%gnq`u
QH~/UnV
/* vy@;zrs
* (non-Javadoc) RAXqRP,iw
* 6bo,x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pRUN[[L
*/ p5c'gziR
public void sort(int[] data) { w&`gx6?-na
int[] temp=new int[data.length]; q;tsA"l
mergeSort(data,temp,0,data.length-1); Mwp#.du(
} +J_A*B
1\kOjF)l
private void mergeSort(int[] data, int[] temp, int l, int r) { 6<sB
int i, j, k; v#YO3nD
int mid = (l + r) / 2; 1}KNzMHk9
if (l == r) H&3VPag
return; k[y{&f,
if ((mid - l) >= THRESHOLD) z`>a,X
mergeSort(data, temp, l, mid); 9!gmS?f
else JR'Q Th:z
insertSort(data, l, mid - l + 1); \TC&/'7}
if ((r - mid) > THRESHOLD) ~e,
mergeSort(data, temp, mid + 1, r); (3{'GX2c
else eey <:n/Z
insertSort(data, mid + 1, r - mid); yTkYPx
bN<c5
for (i = l; i <= mid; i++) { ZCbxL.fFz
temp = data; m$pXe<
} .I {X
for (j = 1; j <= r - mid; j++) { Ai(M06P:h
temp[r - j + 1] = data[j + mid]; L~I<y;x
} /PQg>Pa85
int a = temp[l]; .eK1xwhJ
int b = temp[r]; ')Ozz<{
for (i = l, j = r, k = l; k <= r; k++) { u0w2v+
if (a < b) { ;=*b:y Y
data[k] = temp[i++]; $axaI$bE
a = temp; zd>[uIOR
} else { Ml+.\'r
data[k] = temp[j--]; f==o
b = temp[j]; [$8*(d"F'
} XrFyN(p
} XuoI19V[
} D#W{:_f
n_.2B$JD
/** j4ypXPY``!
* @param data s2b!Nib
* @param l E Jq=MP
* @param i "MM7qV
*/ mK@\6GOMYP
private void insertSort(int[] data, int start, int len) { aE1h0`OT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yY[[)
} K)l{3\9l|
} "*kWM
} Vy16Co
} SO]x^+[
jWUN~#p!
堆排序： htMsS4^Kvd
y !47!Dn
package org.rut.util.algorithm.support; k[A=:H1"
)1~4Tl,S
import org.rut.util.algorithm.SortUtil; kH-1l>":
j3Cpo x
/** ]$y"|xqR
* @author treeroot >F Z6\
* @since 2006-2-2 3`SLMPI
* @version 1.0 *~prI1e(
*/ o PR^Z pt
public class HeapSort implements SortUtil.Sort{ H8Pil H
<LzN/I aJ
/* (non-Javadoc) #wx0xQ~,J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q(oWaG
*/ [-s0'z
public void sort(int[] data) { RTHdL
MaxHeap h=new MaxHeap(); Xb)XV$0
h.init(data); $M$oNOT}Y
for(int i=0;i h.remove(); T7Lk4cU
System.arraycopy(h.queue,1,data,0,data.length); K&D -1u
} \P&'4y~PL
!COaPrg
private static class MaxHeap{ , $78\B^
^^3 >R`
void init(int[] data){ P,xayy
this.queue=new int[data.length+1]; h"#^0$f
for(int i=0;i queue[++size]=data; .6(Bf$E
fixUp(size); %DgU
} XH1so1h
} eZI&d;i
}P-9\*hlm
private int size=0; qNC.|R
e_\4(4x
private int[] queue; {LR?#.
L a0H
public int get() { goIn7ei92
return queue[1]; m#grtmyMrI
} ,5t.0XqS
i\},
public void remove() { 6.KR(V
SortUtil.swap(queue,1,size--); \hv*`ukF
fixDown(1); #u|;YC
} i. `S0
file://fixdown N@?Fpmu/k
private void fixDown(int k) { 8l+\Qyj
int j; jVi''#F?f
while ((j = k << 1) <= size) { UMx>n18;f9
if (j < size %26amp;%26amp; queue[j] j++; Zo-s_6uC
if (queue[k]>queue[j]) file://不用交换 *2=:(OK
break; &R\ .^3
SortUtil.swap(queue,j,k); i?4vdL8M
k = j; q,0o:nI
} AM'-(x|
} e|"`W`"-
private void fixUp(int k) { E-.M+[
while (k > 1) { m`4Sp#m
int j = k >> 1; +)L 'qbCSM
if (queue[j]>queue[k]) #x':qBv#
break; -.ha\t0J
SortUtil.swap(queue,j,k); WH/r$.&
k = j; ]/bf#&@g`k
} .OXvv _?<
} kTc'k
n8iejdA'
} Kn=P~,FaG3
@e$zEj5
} !;zacw
X/2Xr(z"k
SortUtil： A5!f#
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package org.rut.util.algorithm; ;u!>( QQ
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import org.rut.util.algorithm.support.BubbleSort; l)a]V]oQ
import org.rut.util.algorithm.support.HeapSort; 6yv*AmFh
import org.rut.util.algorithm.support.ImprovedMergeSort; t9Pu:B6
import org.rut.util.algorithm.support.ImprovedQuickSort; gqyQ Zew
import org.rut.util.algorithm.support.InsertSort; %I&Hx<Hj
import org.rut.util.algorithm.support.MergeSort; 0)yvyQ5
import org.rut.util.algorithm.support.QuickSort; 0K@s_C=n#
import org.rut.util.algorithm.support.SelectionSort; P]j{JL/g&
import org.rut.util.algorithm.support.ShellSort; cDm_QYQ
;}=v|Dr&I.
/** A4Q8^^byY
* @author treeroot 3xp%o5K
* @since 2006-2-2 1ncY"S/VO
* @version 1.0 ~O 65=8
*/ 6$9n_AS
public class SortUtil { Ia0.I " ,
public final static int INSERT = 1; FTtYzKX(bv
public final static int BUBBLE = 2; ?`,Xb.NA$K
public final static int SELECTION = 3; #N[nvIi}
public final static int SHELL = 4; efl6U/'Ij
public final static int QUICK = 5; pWO,yxr:
public final static int IMPROVED_QUICK = 6; v&xk?F?WU,
public final static int MERGE = 7; x AkM_<
public final static int IMPROVED_MERGE = 8; R`!x<J
public final static int HEAP = 9; ^r}^-
~ NKw}6
public static void sort(int[] data) { .v/s9'lB
sort(data, IMPROVED_QUICK); ~ 9^1m
} !@W1d|{lu
private static String[] name={ ~BDVmQa
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8QXxRD;0:
}; UfOF's_'<
P7 H-Dw
private static Sort[] impl=new Sort[]{ jxZR%D
new InsertSort(), b@/z^k{%
new BubbleSort(), )$#ov-]
new SelectionSort(), Gv?'R0s
new ShellSort(), %kKe"$)0
new QuickSort(), _udH(NC
new ImprovedQuickSort(), UStZ3A'
new MergeSort(), PfF7*}P
new ImprovedMergeSort(), Yvs9)g
new HeapSort() hz>&E,<8q
}; a4 O
b_W0tiyv%
public static String toString(int algorithm){ vp[~%~1(
return name[algorithm-1]; .NiPaUzc<
} UpN:F
++5W_Ooep
public static void sort(int[] data, int algorithm) { )o SFHf
impl[algorithm-1].sort(data); Me`jh8(K\6
} : \:jIP
O<)"kj 7
public static interface Sort { m!$"-nh9
public void sort(int[] data); ]9l=geZd%;
} c03A_2%
Hhx<k{B@7
public static void swap(int[] data, int i, int j) { ,fT5I6l
int temp = data; S^c5
data = data[j]; iRPt0?$
data[j] = temp; Q|"{<2"]U0
} lJ62[2=V
} '2WYbcU