[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; 'j6PL;~c
} qsk8#
int i1=l; *y9 iuJ}
int i2=mid+1; 9&q<6TZz
for(int cur=l;cur<=r;cur++){ O,>1GKw"\
if(i1==mid+1) ja3wXz$2
data[cur]=temp[i2++]; Z"<aS&GH
else if(i2>r) kz\ D-b
data[cur]=temp[i1++]; j(F&*aH78
else if(temp[i1] data[cur]=temp[i1++]; Yv\.QrxPm
else awQf$
data[cur]=temp[i2++]; .?UK`O2Q
} <i``#"/
} 3P-qLbJ
h7c8K)ntnf
} X3vTyIsn
uvz}qH@j/Q
改进后的归并排序: eN fo8xUG
b*S:wfw
package org.rut.util.algorithm.support; ,'?%z>RZm
7^P!@o$v!
import org.rut.util.algorithm.SortUtil; Pou-AzEP$
>Ip>x!wi
/** Qctm"g|
* @author treeroot =|O`al
* @since 2006-2-2 `X'-4/Y
* @version 1.0 !Sx}~XB<
*/ B.vg2N
public class ImprovedMergeSort implements SortUtil.Sort { :j)H;@[I
F/sXr(7
private static final int THRESHOLD = 10; jFf2( AR
( >zXapb2
/* /bv`_>
* (non-Javadoc) -H5n>j0!{
* Wu(6FQ`H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -&I%=0q
*/ :uy8$g*;TE
public void sort(int[] data) { 4SIi<cS0
int[] temp=new int[data.length]; R}IMX9M=
mergeSort(data,temp,0,data.length-1); Wly-z$\
} mO;X>~K
&@u;xc| v
private void mergeSort(int[] data, int[] temp, int l, int r) { 4:RL[;
int i, j, k; o6,$;-?F_
int mid = (l + r) / 2; jE|Ju:}&
if (l == r) D[U[D
return; - ?_aYJ
if ((mid - l) >= THRESHOLD) 3CK4a,]Dm
mergeSort(data, temp, l, mid); _doX&*9u
else dIgaw;Ch]
insertSort(data, l, mid - l + 1); /_}xTP"9
if ((r - mid) > THRESHOLD) GzxtC&
mergeSort(data, temp, mid + 1, r); [ R1S+i
else -fIX6
insertSort(data, mid + 1, r - mid); t"k6wv;Tq
2mN>7Tj:
for (i = l; i <= mid; i++) { WW82=2rJ9
temp = data; 7t=e"|^
} m,NUNd#)\
for (j = 1; j <= r - mid; j++) { ~9c?g(0
temp[r - j + 1] = data[j + mid]; *@[DG)N
} "W$,dWF
int a = temp[l]; _Bm/v^(
int b = temp[r]; L"6qS3[=
for (i = l, j = r, k = l; k <= r; k++) { NPy{ =#k4
if (a < b) { y33+^
data[k] = temp[i++]; RO?5WJpPj
a = temp; ZnSDq_Uk
} else { VZBT'N
data[k] = temp[j--]; H'|b$rP0@
b = temp[j]; %SuEfCM
} :fz&)e9
} awLN>KI]</
} aTF~rAne<
t<s:ut)Q!
/** zBD ?O!
* @param data T;K,.a8bU
* @param l rM<|<6(L
* @param i X-&t!0O4}`
*/ # le<R
private void insertSort(int[] data, int start, int len) { b-R!oP+vP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g((glr)6M
} M&o@~z0
} aZEi|\VU
} "Opk:;.
} 2Pn
Nr)v!z~y
堆排序： ][3H6T!ckL
pwAawm
package org.rut.util.algorithm.support; !i=LQUi.
8?#4<4Ql8
import org.rut.util.algorithm.SortUtil; Kcv7C{-/
V)#se"GV
/** j]th6
* @author treeroot |6/k2d{,(
* @since 2006-2-2 A8 V7\
* @version 1.0 .v;$sst5y
*/ >a7'_n_o
public class HeapSort implements SortUtil.Sort{ >MD['=J[d
4TcKs}z
/* (non-Javadoc) &1)4B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1Q1NircJ
*/ ,>%2`Z)
public void sort(int[] data) { A*#.7Np!"
MaxHeap h=new MaxHeap(); )N h67P3X"
h.init(data); ({JXv
for(int i=0;i h.remove(); eaLSq
System.arraycopy(h.queue,1,data,0,data.length); &5>R>rnB
} *ub]M3O
88(h`RGMh
private static class MaxHeap{ >PdYQDyVS
8OE=7PK
void init(int[] data){ [@d$XC]Qz
this.queue=new int[data.length+1]; KP{|xQ>
for(int i=0;i queue[++size]=data; B1dVHz#
fixUp(size); 7x`dEi<
} T\7z87Q
} w@w(AFV9/
i}teY{pyc
private int size=0; s;V~dxAiv
`kb]tf
private int[] queue; d,kh6'g2@
b|mWEB.p
public int get() { A;~lG3j4
return queue[1]; lnuf_;0
} bH4'j/3
hu}`,2
public void remove() { 9qc<m'MZ
SortUtil.swap(queue,1,size--); tGHZU^B:}
fixDown(1); `x%v&>
} jo 0 d#
file://fixdown 'z$BgXh\
private void fixDown(int k) { u[nx?!
int j; xCU^4DO3p
while ((j = k << 1) <= size) { q =sEtH=
if (j < size %26amp;%26amp; queue[j] j++; ":s1}A
if (queue[k]>queue[j]) file://不用交换 al>^}:
break; RsV<4$
SortUtil.swap(queue,j,k); A9Cq(L_H
k = j; rg Gm[SL*<
} m(MPVY<X
} ?sfas57&y
private void fixUp(int k) { `o~dQb/k+
while (k > 1) { iSDE6
int j = k >> 1; | RMIV
if (queue[j]>queue[k]) Py2AnpYa
break; 7|4t;F!
SortUtil.swap(queue,j,k); ]7<}EG
k = j; e8T#ZWr*
} o!:V=F
} >YP6/w,e
I(LBc
} h| q!Qsnj'
lAjP'(
} ffMh2
v4M1uJ8
SortUtil： O?`=<W/R
l2&cwjc
package org.rut.util.algorithm; nx{_^sK
_$s ;QI]x
import org.rut.util.algorithm.support.BubbleSort; -|E|-'
import org.rut.util.algorithm.support.HeapSort; 1Rrp#E}
import org.rut.util.algorithm.support.ImprovedMergeSort; M"QT(u+
import org.rut.util.algorithm.support.ImprovedQuickSort; Uc oVp}vl
import org.rut.util.algorithm.support.InsertSort; kLc}a5;
import org.rut.util.algorithm.support.MergeSort; %eJolztKZ
import org.rut.util.algorithm.support.QuickSort; ,H6*9!Dv2
import org.rut.util.algorithm.support.SelectionSort; 6z;C~_BV
import org.rut.util.algorithm.support.ShellSort; <dzfD;
CeL`T:]r
/** F3BWi[Xh
* @author treeroot IQn|0$':Z
* @since 2006-2-2 8MUY
* @version 1.0 +um Ua
*/ L~x PIu
public class SortUtil { pkWJb!
public final static int INSERT = 1; l!r2[T]I@7
public final static int BUBBLE = 2; 5:3%RTLG
public final static int SELECTION = 3; TNwBnMe
public final static int SHELL = 4; jUny&Alj
public final static int QUICK = 5; &T7|f!y
public final static int IMPROVED_QUICK = 6; =Xwr*FTr
public final static int MERGE = 7; DH7B4P
public final static int IMPROVED_MERGE = 8; b*C\0D
public final static int HEAP = 9; _i@{:v
fP|rD[
public static void sort(int[] data) { F_28q15~:
sort(data, IMPROVED_QUICK); pPI'0x
} ~W?F.
private static String[] name={ o}EipTL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <*D{uMw
}; ,&+"|,m
Gyo[C98
private static Sort[] impl=new Sort[]{ 66A}5b4)]
new InsertSort(), _<;;CI3w
new BubbleSort(), eN*=wOh
new SelectionSort(), NBLiwL37{
new ShellSort(), W lDcKY
new QuickSort(), sZ~q|}D-
new ImprovedQuickSort(), LW+a-i
new MergeSort(), RM^3Snd=V
new ImprovedMergeSort(), H{XbKLU
new HeapSort() BGk>:Z`
}; -)cau-(X
=m<; Jx5
public static String toString(int algorithm){ =+I~K'2
return name[algorithm-1]; QU`M5{#
} NO(^P+s
%BdQ.\4DS
public static void sort(int[] data, int algorithm) { &b!L$@6
impl[algorithm-1].sort(data); !m7`E
} ].E89_|O
jZRf{
public static interface Sort { FG-v71!h#
public void sort(int[] data); q_0So}
} ;3\oU$'
E;$;g#ksf
public static void swap(int[] data, int i, int j) { BQX6Q<
int temp = data; nIRJ5|G(
data = data[j]; !v^{n+
data[j] = temp; U<T.o0s=
} )Dg;W6
} .Vohd@s9l