[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; "jH=O(37
} "G-} wt+P
int i1=l; \/g.`Pe
int i2=mid+1; o_p#sdt"
for(int cur=l;cur<=r;cur++){ SH2|xn
if(i1==mid+1) r t@Jw]az
data[cur]=temp[i2++]; fpJM)HU
else if(i2>r) l&S2.sC
data[cur]=temp[i1++]; 1P:r=Rt/
else if(temp[i1] data[cur]=temp[i1++]; AC@WhL
else o7)<pfif
data[cur]=temp[i2++]; S#Tc{@e
} l)m\i_r:
} lG/M%i
G.OAzA13!t
} eVyXh>b*
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改进后的归并排序: zV_U/]y
fNNkc[YTZI
package org.rut.util.algorithm.support; ^I=c]D]);
!qsk;Vk7Z
import org.rut.util.algorithm.SortUtil; s!esk%h{K
!'o5X]s
/** XW w=3$
* @author treeroot '^)Ve:K-.
* @since 2006-2-2 w?)v#]<-
* @version 1.0 6ziiV_p
*/ l2QO\O I9m
public class ImprovedMergeSort implements SortUtil.Sort { ]fvU}4!
Fk@A;22N
private static final int THRESHOLD = 10; /. GHR
P,r9<
/* y|f`sBMM
* (non-Javadoc) aG.j0`)%
* 7p%W)=v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) knrR%e;
*/ d0ThhO
public void sort(int[] data) { 7cV9xIe^
int[] temp=new int[data.length]; 2?9 FFlX
mergeSort(data,temp,0,data.length-1); 0g}+%5]yg
} 64;F g/t
kY*3)KCp
private void mergeSort(int[] data, int[] temp, int l, int r) { 4A^=4"BCV
int i, j, k; M24FuS
int mid = (l + r) / 2; V9[-# Ti
if (l == r) k>y68_
return; =r=[e}&9
if ((mid - l) >= THRESHOLD) Pz#D9.D0
mergeSort(data, temp, l, mid); eSo/1D
else [,[;'::=o4
insertSort(data, l, mid - l + 1); WBD e`
if ((r - mid) > THRESHOLD) lPF(&pP
mergeSort(data, temp, mid + 1, r); qD=o;:~Km
else :9un6A9JS
insertSort(data, mid + 1, r - mid); Y[Jt+p]
7OY<*ny
for (i = l; i <= mid; i++) { iU3)4(R
temp = data; SQ!wq
} ^Yz.,!B[
for (j = 1; j <= r - mid; j++) { 5[l9`Cn&A
temp[r - j + 1] = data[j + mid]; 5ws|4V
} 4+%;eY.A
int a = temp[l]; 8}9|hT;
int b = temp[r]; #-$\f(+<
for (i = l, j = r, k = l; k <= r; k++) { d\Cx(Lb[
if (a < b) { :U)>um34e
data[k] = temp[i++]; [5K&J-W
a = temp; $MD|YW5
} else { g&9E>wT
data[k] = temp[j--]; ;/+VHZP;
b = temp[j]; +]Ca_`
} Y2709LWmP
} i bAZ*I
} Ncr38~;w
^% y<7>%
/** #eSVFD5ZU
* @param data q>:>f+4
* @param l 7 j$ |fS
* @param i E +\?|q !T
*/ > w:+nG/r
private void insertSort(int[] data, int start, int len) { Lt ;!q b.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c4QegN
} d~+8ui{-U
} 8m,PsUp7
} qjcy{@ j
} 2,,zN-9mt
9Fb|B
堆排序： YI05?J}
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package org.rut.util.algorithm.support; f>.A^?
U:6 J~
import org.rut.util.algorithm.SortUtil; [U+6Tj,
fy|ycWW>8
/** ^Q!qJav
* @author treeroot 6&/H XqP
* @since 2006-2-2 p;Ezmz
* @version 1.0 v~^c-]4I
*/ ?^]29p_
public class HeapSort implements SortUtil.Sort{ &atT7m
ZqKUz5M4
/* (non-Javadoc) :M" NB+T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #hL<9j
*/ {Ic~}>w
public void sort(int[] data) { $nN`K*%
MaxHeap h=new MaxHeap(); Eq$Q%'5*ua
h.init(data); R^zTgyr
for(int i=0;i h.remove(); ]jo^P5\h>
System.arraycopy(h.queue,1,data,0,data.length); bg.f';C
} XE8~R5
L~e\uP
private static class MaxHeap{ 2q}M1-^
_4qP0LCa
void init(int[] data){ =Gsn4>~%n
this.queue=new int[data.length+1]; W\09hZ6
for(int i=0;i queue[++size]=data; j" wX7
fixUp(size); YrAaL"20
} T' O5>e
} OiPE,sv
RqTW$94RD
private int size=0; Q*wub9
""`>v`\
private int[] queue; e*5TZ7.
QuFcc}{<]
public int get() { 'G1~\CT
return queue[1]; nLK%5C
} jxA`RSY
O8BxXa@5
public void remove() { :x e/7-
SortUtil.swap(queue,1,size--); &sbA:xZBA
fixDown(1); (lv|-Phc.
} RFF&-M]
file://fixdown `P;fD/I
private void fixDown(int k) { i<<NKv8;
int j; 4u5^I;4pL
while ((j = k << 1) <= size) { :ie7HF
if (j < size %26amp;%26amp; queue[j] j++; CD#:*
if (queue[k]>queue[j]) file://不用交换 Y9F78=Q
break; SI_{%~k*B
SortUtil.swap(queue,j,k); M$O}roOa
k = j; c-nBB
} Hbogi1!al|
} I!bzvPJ]xc
private void fixUp(int k) { xLht6%o*
while (k > 1) { 'A91i
int j = k >> 1; n"B"Aysz
if (queue[j]>queue[k]) J;+AG^U<
break; TbyQ'MbUv
SortUtil.swap(queue,j,k); 5=CLR
k = j; nA8]/r1k
} YpQ/ )fSEV
} *yAC8\v
=IBdnEz:M
} /'U/rjb_h{
/7Z0|Zw]
} #5HJW[9
5A]IiX4Z
SortUtil： Zf;1U98oC
(:3rANY|
package org.rut.util.algorithm; |6LC>'
;w1?EdaO
import org.rut.util.algorithm.support.BubbleSort; ':yE5j
import org.rut.util.algorithm.support.HeapSort; Zyqh
import org.rut.util.algorithm.support.ImprovedMergeSort; MtOAA
import org.rut.util.algorithm.support.ImprovedQuickSort; fd >t9.
import org.rut.util.algorithm.support.InsertSort; = !D<1<
import org.rut.util.algorithm.support.MergeSort; H?8uy_Sc
import org.rut.util.algorithm.support.QuickSort; "Yw-1h`fR
import org.rut.util.algorithm.support.SelectionSort; kE QT[Lo
import org.rut.util.algorithm.support.ShellSort; mNw|S*C
r.M8#YL
/** {UT>> *C
* @author treeroot $?p^ m`t_
* @since 2006-2-2 RW 23lRA6
* @version 1.0 jYKs| J)[
*/ LLOe
public class SortUtil { )_!t9gn*wr
public final static int INSERT = 1; fx|$(D@9
public final static int BUBBLE = 2; l= 5kd.{
public final static int SELECTION = 3; xy`aR< L
public final static int SHELL = 4; C/dqCUX:
public final static int QUICK = 5; lPm'>,}Y
public final static int IMPROVED_QUICK = 6; _[h1SAJ
public final static int MERGE = 7; _QCspPT' c
public final static int IMPROVED_MERGE = 8; ,vP9oY[n
public final static int HEAP = 9; G`E%uyjG$j
*g&[?y`UC
public static void sort(int[] data) { ?bbu^;2*f
sort(data, IMPROVED_QUICK); ?b, eZ+t
} 6 )eO%M`
private static String[] name={ &,Dh*)k
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bt|S!tEy
}; z<_{m4I;
EOhUr=5~
private static Sort[] impl=new Sort[]{ b8)>:F
new InsertSort(), }S'+Ytea
new BubbleSort(), s9) @$3\
new SelectionSort(), WQ4:='(
new ShellSort(), 4A0R07"
new QuickSort(), e#L/
new ImprovedQuickSort(), 7dI+aJ
new MergeSort(), Sj{z
new ImprovedMergeSort(), ;<0Q<0G
new HeapSort() bnLvJ]i)
}; &k(t_~m>
sJtz{'
public static String toString(int algorithm){ VkFTIyt
return name[algorithm-1]; O?NAbxkp
} lwPK^)|}
I"*g-ji0
public static void sort(int[] data, int algorithm) { /HH5Mn*
impl[algorithm-1].sort(data); (qHI>3tpY
} T#?KY
{y=H49
public static interface Sort { oz%ZEi\bW
public void sort(int[] data); "XMTj <D
} lY!`<_Am
l/;OC
public static void swap(int[] data, int i, int j) { oH!sJ&"#_
int temp = data; 4W}8?&T
data = data[j]; 4%2QF F@
data[j] = temp; ohusL9D
} 2H fP$.
} wG2lCv`d