[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; dH!k{3bL
} @6i^wC
int i1=l; eF"7[_+D
int i2=mid+1; 1,W%t\D
for(int cur=l;cur<=r;cur++){ "Q+'lA[}
if(i1==mid+1) 3l>P>[<o
data[cur]=temp[i2++]; IqEY.2KN
else if(i2>r) neQ2+W%oj
data[cur]=temp[i1++]; E]_lYYkA
else if(temp[i1] data[cur]=temp[i1++]; uavts9v<
else 7(~^6Ql!
data[cur]=temp[i2++]; 96vv85g
} mn" a$
} Bl'
v>g1\yIw
} XFmnZpqXH
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改进后的归并排序: "[H9)aAj7
s.KJYP
package org.rut.util.algorithm.support; ]&VD$Z984r
U%_a@&<
import org.rut.util.algorithm.SortUtil; RgQ\Cs24Q
Yq/|zTe{
/** QE!cf@~n"
* @author treeroot sXl7
* @since 2006-2-2 8pDJz_F!{
* @version 1.0 .Rc&EO
*/ ^F`FB..:y
public class ImprovedMergeSort implements SortUtil.Sort { 4ej$)AdW3
r7*[k[^[^
private static final int THRESHOLD = 10; ~srmlBi6
7z=Ss'O]
/* u[s+YGS
* (non-Javadoc) \{G6!dV|S
* ^gkyi/z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5.VA1
*/ ~AK!_EOs`
public void sort(int[] data) { QsDab4
int[] temp=new int[data.length]; vD1jxk'fd
mergeSort(data,temp,0,data.length-1); DfV_08
} r9s1\7]x
?ArQ{9c
private void mergeSort(int[] data, int[] temp, int l, int r) { |=38t8Ge&
int i, j, k; o|alL-
int mid = (l + r) / 2; v1 oSf
if (l == r) jKI+-s
return; QE)g==d
if ((mid - l) >= THRESHOLD) .1|'9@]lj4
mergeSort(data, temp, l, mid); LAf!y"A#
else 9S6vU7W
insertSort(data, l, mid - l + 1); Fw"~f5O
if ((r - mid) > THRESHOLD) s/sH",
mergeSort(data, temp, mid + 1, r); LC[,K
else 2HQ'iEu$
insertSort(data, mid + 1, r - mid); \|j`jsq
3u{[(W}08
for (i = l; i <= mid; i++) { f#JLE+0Y
temp = data; = "c _<?=[
} $am7 xd
for (j = 1; j <= r - mid; j++) { 4)'5;|pI
temp[r - j + 1] = data[j + mid]; uLhamE)
} (: ZOoL
int a = temp[l]; Q:-H UbB
int b = temp[r]; "t"dz'
for (i = l, j = r, k = l; k <= r; k++) { Uk;SY[mU
if (a < b) { 4ItXZo
data[k] = temp[i++]; T X6Ydd
a = temp; ,=6Eju#P
} else { @[ :sP
data[k] = temp[j--]; VWfrcSZg6M
b = temp[j]; mL6/NSSz
} &.(ZO]
} 7Zu!s]t
} /B1<N}
\3)%p('
/** A%+~
* @param data >t*zY~R.
* @param l 7qW:^2y
* @param i Ubn5tN MK
*/ i7fpl
private void insertSort(int[] data, int start, int len) { b>2u>4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V!},a@>p
} Mh_jlgE'd#
} g4Hq<W"
} =$BgIt
} tvb hWYe
*~&W?i
堆排序： X:62)^~'
}doj4
package org.rut.util.algorithm.support; Tm3$|+}$f
)2^OBfl7
import org.rut.util.algorithm.SortUtil; *^.b}K%
O=mGL
/** UBC[5E$
* @author treeroot dc?Yk3(Y
* @since 2006-2-2 })!n1kt
* @version 1.0 ARU,Wtj#
*/ OvK_CN{
public class HeapSort implements SortUtil.Sort{ C|!E'8Rw
>Q+EqT
/* (non-Javadoc) |qbJ]v!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]L&_R^
*/ (V=lK6WQm
public void sort(int[] data) { O _1}LS!
MaxHeap h=new MaxHeap(); /#,<>EfT
h.init(data); UZ](X/
for(int i=0;i h.remove(); rSEJ2%iF*
System.arraycopy(h.queue,1,data,0,data.length); r2sog{R
} dOiy[4s
ut\9@>*J=Q
private static class MaxHeap{ sgB3i`_M
j6v +S
void init(int[] data){ &F.lo9JJ
this.queue=new int[data.length+1]; >eUAHmXQ|
for(int i=0;i queue[++size]=data; B:x4H}`vh
fixUp(size); P_ZguNH
} K8ThZY%
} Ak}l6{ ..
`L;I/Hp
private int size=0; n$=n:$`q
BC4u,4S
private int[] queue; a[#4Oq/t$
BO h
public int get() { Nxt/R%(
return queue[1]; Hss{Sb(
} vNtbb]')m
+ZZiZ&y
public void remove() { sPZa|AKHb
SortUtil.swap(queue,1,size--); ?tSY=DK\n
fixDown(1); 3IJIeG>
} Qu;AU/Q<([
file://fixdown }'X}!_9w>
private void fixDown(int k) { 9td(MZ%i~N
int j; ~O^_J)
while ((j = k << 1) <= size) { < )?&Jf>_
if (j < size %26amp;%26amp; queue[j] j++; _D+7w'8h
if (queue[k]>queue[j]) file://不用交换 igo7F@_,
break; W&p-Z"=)
SortUtil.swap(queue,j,k); 6U""TR!
k = j; iu1iO;q
} a\MU5%}\
} hi ]+D= S
private void fixUp(int k) { @\q~OyV
while (k > 1) { "3>#[o
int j = k >> 1; 2]C0d8=*?
if (queue[j]>queue[k]) <Jvrmm[
break; |6;.C1\,
SortUtil.swap(queue,j,k); K8RloDjk_A
k = j; $qEJO=v
} ims *|~{sr
} (>Yii_Cd
'x18F#g
} gM=~dBz
kO9yei
} 4%]{46YnK
NCsUC
SortUtil： ]v#T'<Nl
#?,cYh+
package org.rut.util.algorithm; 7u}r^+6_o
Q^F-8
import org.rut.util.algorithm.support.BubbleSort; zzx4;C",u
import org.rut.util.algorithm.support.HeapSort; r94BEC 2
import org.rut.util.algorithm.support.ImprovedMergeSort; cN :;ir
import org.rut.util.algorithm.support.ImprovedQuickSort; ^KhFBed
import org.rut.util.algorithm.support.InsertSort; Fb}9cpz{
import org.rut.util.algorithm.support.MergeSort; '1{~y3
import org.rut.util.algorithm.support.QuickSort; p75w^
import org.rut.util.algorithm.support.SelectionSort; b"Ulc}$/&
import org.rut.util.algorithm.support.ShellSort; Vw#07P#A
WFdS#XfV
/** \:#b9t{B-
* @author treeroot 8<G@s`*
* @since 2006-2-2 v0y7N_U5n
* @version 1.0 #"OKO6]
*/ 1|]-F;b
public class SortUtil { ,L^L uw'7
public final static int INSERT = 1; K0#tg^z5d
public final static int BUBBLE = 2; 0I&rZMpF&
public final static int SELECTION = 3; "8rP?B(
public final static int SHELL = 4; ae<KUThm.
public final static int QUICK = 5; W"0#
public final static int IMPROVED_QUICK = 6; OkQSqL
public final static int MERGE = 7; *GDU=D}
public final static int IMPROVED_MERGE = 8; V]8fn MH
public final static int HEAP = 9; /bb4nM_E/
{.2C>p
public static void sort(int[] data) { yQW\0&a$
sort(data, IMPROVED_QUICK); `=>Bop)
} S%4hv*_c
private static String[] name={ n/6A@C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (=\P|iv
}; xtnB:3
v{jl)?`~w
private static Sort[] impl=new Sort[]{ .xD-eWw3R
new InsertSort(), l)|CPSN?w
new BubbleSort(), _]4cY%s
new SelectionSort(), :[rx|9M6
new ShellSort(), 'X?`+2wK
new QuickSort(), o+vf
new ImprovedQuickSort(), YnMph0\Y^
new MergeSort(), bw[!f4~
new ImprovedMergeSort(), >i.+v[)#
new HeapSort() 8R z=)J
}; #eaey+~
f(C0&"4e
public static String toString(int algorithm){ v ;9s
return name[algorithm-1]; W,<Vr2J[
} m&x0,8
C +IXP
public static void sort(int[] data, int algorithm) { 'D-imLV<<
impl[algorithm-1].sort(data); V*AG0@&!
} qB&*"gf
a2i
public static interface Sort { j4l7Tx
public void sort(int[] data); (I+-wki"e
} +j<Nu)0iY
7OZs~6(
public static void swap(int[] data, int i, int j) { ^NCH)zK]v
int temp = data; ,aN/``j=
data = data[j]; S*]IR"YL
data[j] = temp; <O*q;&9
} !1l2KW<be
} dfrq8n]