[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; ydt1ED0Q-
} <$ 5\^y,V
int i1=l; 3r\QLIr L8
int i2=mid+1; ZU`"^FQ3A
for(int cur=l;cur<=r;cur++){ P1t5-q
if(i1==mid+1) '&9b*u";x(
data[cur]=temp[i2++]; [Mi~4b
else if(i2>r) {T.VB~C
data[cur]=temp[i1++]; yC[}gHv
else if(temp[i1] data[cur]=temp[i1++]; %9j]N$.V
else Nx99dr
data[cur]=temp[i2++]; 6 Qmtb2
} Dg@6o
} LE;c+(CAU
qVfOf\x.e
} FB@G.f
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改进后的归并排序: xRfX:3
d^7<l_u~ !
package org.rut.util.algorithm.support; !Ej<J&e
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import org.rut.util.algorithm.SortUtil; {?8rvAjY
i|t$sBIh
/** q45n.A6a
* @author treeroot z8oSh t`+
* @since 2006-2-2 344- ~i*
* @version 1.0 Px<;-H`
*/ %\A~w3E
public class ImprovedMergeSort implements SortUtil.Sort { ek9%Xk8
e.N#+
private static final int THRESHOLD = 10; BsJClKp/
D3]_AS&\
/* W|:WAxJ*d
* (non-Javadoc) y=t -/*K
* mwt3EV5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EB\\ F
*/ F J)la9
public void sort(int[] data) { J&Ah52
int[] temp=new int[data.length]; n}"MF>zDK
mergeSort(data,temp,0,data.length-1); +p2)uXqW
} hQ9VcS6=gD
ujaaO6oZ7
private void mergeSort(int[] data, int[] temp, int l, int r) { }q^CR(h (R
int i, j, k; *p"%cas
int mid = (l + r) / 2; % 74}H8q_z
if (l == r) k3&Wv
return; \n}cx~j
if ((mid - l) >= THRESHOLD) K#>B'>A\
mergeSort(data, temp, l, mid); gD-<^Q-
else xu3qX"
insertSort(data, l, mid - l + 1); Ra/S46$
if ((r - mid) > THRESHOLD) Ta_#Rg*!
mergeSort(data, temp, mid + 1, r); T!8,R{V]4
else *cf#:5Nl
insertSort(data, mid + 1, r - mid); z;T?2~g!
9BP-Iet
for (i = l; i <= mid; i++) { -{HA+YL H
temp = data; 4oJ0,u
} ./u3z|q1
for (j = 1; j <= r - mid; j++) { 0y?bwxkc
temp[r - j + 1] = data[j + mid]; JMXCyDy;
} WawOap
int a = temp[l]; Ls( &.
int b = temp[r]; Hd :2
for (i = l, j = r, k = l; k <= r; k++) { -Wf 2m6t
if (a < b) { )<%GHDWL
data[k] = temp[i++]; T{Av[>M
a = temp; LBTf}T\
} else { iNcB6,++
data[k] = temp[j--]; [S4<bh!
b = temp[j]; XLB7 E
} )Zox;}WK+
} H?PaN)_6-+
} kIyif7
mk}8Cu4
/** 1$4dzI()
* @param data ->d3FR
* @param l svN&~@l
* @param i y6fYNB
*/ @PutUYz
private void insertSort(int[] data, int start, int len) { _qr?v=,-A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s_/CJ6s
} rOX\rI%0+
} !Eu}ro.}
} 04o(05K
} T)MKhK9\Ab
k*J0K=U|
堆排序： d-y8c
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package org.rut.util.algorithm.support; nGq{+ G
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import org.rut.util.algorithm.SortUtil; xtyOG
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/** `Ps&N^[
* @author treeroot ?|kwYA$4o
* @since 2006-2-2 Ch>r.OfP
* @version 1.0 =nGgk}Z
*/ ,XU<2jv]
public class HeapSort implements SortUtil.Sort{ R10R,*6>
vr"O9L w
/* (non-Javadoc) 0tK(:9S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xcty
*/ 2)-Umq{]{
public void sort(int[] data) { |cs]98FEf
MaxHeap h=new MaxHeap(); 9!;/+P
h.init(data); @P@?KZ..v!
for(int i=0;i h.remove(); G .NGS%v
System.arraycopy(h.queue,1,data,0,data.length); ZwM(H[iqL
} \I(g70
n86LU Sj5
private static class MaxHeap{ lxf+$Z`~:
*lc|iq\
void init(int[] data){ "Doz~R\\
this.queue=new int[data.length+1]; 1R-WJph
for(int i=0;i queue[++size]=data; 7_HFQT1.N
fixUp(size); ^VOFkUp)
} evjj~xkte
} W[/Txc0$
]Q$Sei5
private int size=0; }p5_JXBV
Kl_(4kQE_
private int[] queue; 3$G &~A{
g8kS}7/
public int get() { zncKd{Q\tP
return queue[1]; u.;l=tzz
} VkFMr8@|
cDS\=Bf
public void remove() { 52ExRG S
SortUtil.swap(queue,1,size--); 0Xb,ne 7
fixDown(1); 2ci[L:U
} z.lIlp2:
file://fixdown =U'!<w<-
private void fixDown(int k) { > 9.%hSy
int j; V_zU?}lZ^
while ((j = k << 1) <= size) { V/`vX;%
if (j < size %26amp;%26amp; queue[j] j++; jh(T?t$&
if (queue[k]>queue[j]) file://不用交换 LY-,cXm&|
break; zG{P5@:.R
SortUtil.swap(queue,j,k); z^vfha
k = j; qA0PGo
} # ~Doz7~
} GXG 7P,p,
private void fixUp(int k) { 9fm9xTL
while (k > 1) { >v2/0>U
int j = k >> 1; D%L^[|)c\s
if (queue[j]>queue[k]) oz:"w nX
break; #/_{(P
SortUtil.swap(queue,j,k); 't6l@_x
k = j; ZLP/&`>8
} tq}MzKI*
} ClG\Kpirh
x ]">
} p]0`rf!|
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} By waD?
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SortUtil： k3K*{"z
q #mBNe62p
package org.rut.util.algorithm; =p^$>o
k4a51[SYBK
import org.rut.util.algorithm.support.BubbleSort; _3(rwD
import org.rut.util.algorithm.support.HeapSort; !wN2BCSY@
import org.rut.util.algorithm.support.ImprovedMergeSort; 3\2%i6W6
import org.rut.util.algorithm.support.ImprovedQuickSort; )r^vrCNy>
import org.rut.util.algorithm.support.InsertSort; -L+kt_>
import org.rut.util.algorithm.support.MergeSort; ,OWk[0/
import org.rut.util.algorithm.support.QuickSort; UB/"&I uo
import org.rut.util.algorithm.support.SelectionSort; h4jo<yp\
import org.rut.util.algorithm.support.ShellSort; v4<W57oH
elAWQEus
/** 2xf#@`U
* @author treeroot ?a#Gn2
* @since 2006-2-2 _V4O#;%?
* @version 1.0 !KMl'kswe:
*/ 9}%$j
public class SortUtil { Q,:{(R
public final static int INSERT = 1; KCO.8=y3
public final static int BUBBLE = 2; D(l,Z
public final static int SELECTION = 3; 6@TU9AZS`
public final static int SHELL = 4; A|GtF3:G
public final static int QUICK = 5; ]!ox2m_U
public final static int IMPROVED_QUICK = 6; VwpC UW
public final static int MERGE = 7; n&Ckfo_D
public final static int IMPROVED_MERGE = 8; f`:GjA,J$
public final static int HEAP = 9; -w*fS,O
PChew3
public static void sort(int[] data) { C7ug\_,s
sort(data, IMPROVED_QUICK); vhPlH0
} yUj`vu2
private static String[] name={ o3V\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <Y."()}GeH
}; o2X95NiH
LD ]-IX&L
private static Sort[] impl=new Sort[]{ N"}>);r
new InsertSort(), Xf_#O'z
new BubbleSort(), Kf1J;*i|\
new SelectionSort(), {;DAKWm@T
new ShellSort(), gu3iaM$W
new QuickSort(), Mh*r)B~%[
new ImprovedQuickSort(), dzEi^* (8
new MergeSort(), K(i}?9WD
new ImprovedMergeSort(), o!:Z?.!
new HeapSort() 1l$2T y+ =
}; (IBT|K
XjF@kQeM=
public static String toString(int algorithm){ Qn7T{ BW
return name[algorithm-1]; Rjq Xz6
} ._^}M<o L
wn.~Dx
public static void sort(int[] data, int algorithm) { ][wb4$2
impl[algorithm-1].sort(data); ]R_R`X?
} n9xP8<w8
Iz1x|EQ
public static interface Sort { [a04( 2g
public void sort(int[] data); `p&[b]b
} >*RU:X
<mQXS87
public static void swap(int[] data, int i, int j) { LP6p
int temp = data; l3sF/zkH
data = data[j]; |]4!WBK
data[j] = temp; T[Zs{S
} HwHF8#D*l
} c`soVqT$?