[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; meR2"JN'
} MlFvDy
int i1=l; *-_Npu6
int i2=mid+1; Qx;A; n!lw
for(int cur=l;cur<=r;cur++){ 7o. 'F
if(i1==mid+1) %jkPrI
data[cur]=temp[i2++]; }El_.@'T &
else if(i2>r) !U_L7
data[cur]=temp[i1++]; cy4'q?r
else if(temp[i1] data[cur]=temp[i1++]; Pc'?p
else &pm{7nH
data[cur]=temp[i2++]; `qTY
} %S.U`(.
} vXbT E$
i7V~LO:gq
} Ao T7sy7
p( *3U[1
改进后的归并排序: =]e^8;e9
+pvJ?"J
package org.rut.util.algorithm.support; Br5Io=/wg
!Yu-a!
import org.rut.util.algorithm.SortUtil; $4 Uy3C+6
;Oy>-Ij5P
/** -(1\`g07
* @author treeroot P~e$iBH'
* @since 2006-2-2 dU6LB+A
* @version 1.0 I0K!Kcu5Iu
*/ pm\X*t}L
public class ImprovedMergeSort implements SortUtil.Sort { }eM<A$J
or}*tSKX
private static final int THRESHOLD = 10; de9l;zF
:N*T2mP
/* =joXP$n^
* (non-Javadoc) e6lOmgHn5
* K"7;Y#1g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x-&v|w'
*/ P*`xiTA
public void sort(int[] data) { YS~t d+*
int[] temp=new int[data.length]; rz{'X d
mergeSort(data,temp,0,data.length-1); ?(yFwR,(
} ]0 RXo3
T+RI8.#o
private void mergeSort(int[] data, int[] temp, int l, int r) { '*u;:[73
int i, j, k; +f!,K
int mid = (l + r) / 2; F|TMpH/
if (l == r) "R@N|Qx'
return; MdZgS#`
if ((mid - l) >= THRESHOLD) dM{~Ubb
mergeSort(data, temp, l, mid); DA`sm
else x9l0UD*+g
insertSort(data, l, mid - l + 1); mo[<4Uks
if ((r - mid) > THRESHOLD) 2F@)nh
mergeSort(data, temp, mid + 1, r); c8tC3CrKp=
else 0WE1}.J<
insertSort(data, mid + 1, r - mid); ?7)(qnbe"
2Fgt)`{!
for (i = l; i <= mid; i++) { FJ8@b
temp = data; BK9x`Oo2
} '<< ~wt
for (j = 1; j <= r - mid; j++) { Uy5!H1u
temp[r - j + 1] = data[j + mid]; PMhhPw]
} 1Dp@n
int a = temp[l]; _G #"B{7
int b = temp[r]; ;+34g6
for (i = l, j = r, k = l; k <= r; k++) { lc7a@qnw
if (a < b) { bDBO+qA
data[k] = temp[i++]; zL`uiZl
a = temp; `(/saq*
} else { e>9Z:vY
data[k] = temp[j--]; =4<S8Cp
b = temp[j]; X|E+K
} rw[{@|)'z
} A]Tcj^#
} ,GkW. vEU
ds;cfj[
/** nVn|$ "r
* @param data ywynx<Wg
* @param l Kt,ynA
* @param i 34wM%@D*c
*/ t-*|Hfp*^
private void insertSort(int[] data, int start, int len) { ?4[Oh/]R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SiqX1P
} a,*p_:~i
} %m{.l4/!O
} D?yE$_3>c
} <o!&Kk9
_b_?9b-)D
堆排序： ``|RO[+2
dMs||&|&
package org.rut.util.algorithm.support; {{*]bGko
X";ZUp
import org.rut.util.algorithm.SortUtil; E<Dh_K
6QLQ1k`
/** BCUt`;q ]B
* @author treeroot ;=+Zw1/g
* @since 2006-2-2 ,ah*!Zm.kk
* @version 1.0 fA_%8CjI
*/ =Y/fF
public class HeapSort implements SortUtil.Sort{ pq[X)]z|
W.`Xm(y
/* (non-Javadoc) Z%5nVsm:G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g:DTVq
*/ yvd `nV
public void sort(int[] data) { T3 9C lH
MaxHeap h=new MaxHeap(); 4[#6<Ixf
h.init(data); \}Acq;
for(int i=0;i h.remove(); /$9 :L
System.arraycopy(h.queue,1,data,0,data.length); ^+%tlX_+.
} 5rmlAq
Cb{A:\>Q{
private static class MaxHeap{ $HBT%g@UN
juMxl
void init(int[] data){ tpa^k
this.queue=new int[data.length+1]; J,0pe\5
for(int i=0;i queue[++size]=data; @>G&7r:U
fixUp(size); o"#TZB+k
} }B=qH7u.K
} YWRE&MQ_
w=D%D8 r2
private int size=0; UV']NHh
lH)em.#
private int[] queue; #~4{`]W6
b H"}w$!>r
public int get() { <r<Dmn|\a
return queue[1]; d]CviQUq
} J0Hm)*
J1tzHa6
public void remove() { 7Aio`&^
SortUtil.swap(queue,1,size--); J3~hzgY
fixDown(1); ,](v?v.[4
} Jh$"fr3
file://fixdown F)/~p&H
private void fixDown(int k) { \f/#<|Hm
int j; *H5PT
while ((j = k << 1) <= size) { CZJHE>
if (j < size %26amp;%26amp; queue[j] j++; tE]5@b,R
if (queue[k]>queue[j]) file://不用交换 uNe}"hs
break; qDRNtFa
SortUtil.swap(queue,j,k); \D,M2vC~G
k = j; QB/7/PW{H\
} ]yAEjn9cN
} ~v2V`lxh
private void fixUp(int k) { 4ZI!,lv*
while (k > 1) { tw'hh@7-Y
int j = k >> 1; ?7yQ&p
if (queue[j]>queue[k]) jby~AJf%
break; /M^V2=
SortUtil.swap(queue,j,k); [jl2\3*
k = j; AanH{
} ]{!!7Zz
} 6z#lN>Y-`
u0XP(dH
} Dac ^*k=D
1C_'H.q<=
} :[Qp2Gg O\
Ap]4QqU
SortUtil： L1hD}J'$4
'e.q 7Jpd
package org.rut.util.algorithm; F!7f_m0=
g7xbyBo7
import org.rut.util.algorithm.support.BubbleSort; +/y{^}b/
import org.rut.util.algorithm.support.HeapSort; xLx"*jyL
import org.rut.util.algorithm.support.ImprovedMergeSort; K2cq97k,d
import org.rut.util.algorithm.support.ImprovedQuickSort; >|a\>UgC
import org.rut.util.algorithm.support.InsertSort; 3ppuQQ
import org.rut.util.algorithm.support.MergeSort; yS[z2:!
import org.rut.util.algorithm.support.QuickSort; ;/@?6T"
import org.rut.util.algorithm.support.SelectionSort; J3;Tm~KJ_
import org.rut.util.algorithm.support.ShellSort; h/I@_?k+
I*D<J$ 9N
/** v%lv8Lar'
* @author treeroot 8f?rEI\0GD
* @since 2006-2-2 GAv)QZyV$
* @version 1.0 S8O)/Sg=
*/ 9>N\sOh
public class SortUtil { nVxq72o@
public final static int INSERT = 1; Rl_.;?v"!
public final static int BUBBLE = 2; 8+"10q-
public final static int SELECTION = 3; /61by$E
public final static int SHELL = 4; 4|nQ=bIau
public final static int QUICK = 5; "hWJ3pi{o{
public final static int IMPROVED_QUICK = 6; 0Tcz[$?
public final static int MERGE = 7; sNm,Fmuz:
public final static int IMPROVED_MERGE = 8; oW^k7#<e}
public final static int HEAP = 9; ~xS@]3n=
jCzGus!rM
public static void sort(int[] data) { aH%ZetLNJ
sort(data, IMPROVED_QUICK); E;6~RM:
} uie~'K\y
private static String[] name={ [UMLx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?VB#GJ0M9
}; eGLO!DdxZ
-b cG[W3
private static Sort[] impl=new Sort[]{ \a"i7Caa
new InsertSort(), oEJaH
new BubbleSort(), *p=fi
new SelectionSort(), RI-A"cc6A
new ShellSort(), }2lO _i}L
new QuickSort(), ;SgD 5Ln}
new ImprovedQuickSort(), &K>cW$h=a
new MergeSort(), [|4}~UV
new ImprovedMergeSort(), AHwG<k
new HeapSort() OU!nN>ln
}; QU.0Elw
OB~C}'^$
public static String toString(int algorithm){ P/ci/y_1
return name[algorithm-1]; D?^540,b
} ;{k=C2
BRb\V42i;
public static void sort(int[] data, int algorithm) { 20aZI2sk`
impl[algorithm-1].sort(data); {LP b))
} EZ<80G
5G#$c'A{4
public static interface Sort { 6mCq/$
public void sort(int[] data); :G-1YA
} 6 }!Z"
wUoiXi09
public static void swap(int[] data, int i, int j) { Q"%QQo}}
int temp = data; *(G&B\
data = data[j]; ~Rs#|JWB2V
data[j] = temp; il12T`a
} #$FrFU;ZR
} _#!U"hkH