[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; a~opE!|m
} w^Ag]HZN
int i1=l; &<Zdyf?[Ou
int i2=mid+1; 8eN7VT eb
for(int cur=l;cur<=r;cur++){ \x(^]/@
if(i1==mid+1) hO \/
data[cur]=temp[i2++]; s1bU
else if(i2>r) g5Hr7Km
data[cur]=temp[i1++]; /OG zt
else if(temp[i1] data[cur]=temp[i1++]; R5(F)abi
else CW p#^1F
data[cur]=temp[i2++]; 1'Rmg\(
} Xh}&uZ`A
} FY4T(4#
y^R4I_* z
} <( EyXV
wt?o 7R2
改进后的归并排序: D:9 2\l
bq NP#C
package org.rut.util.algorithm.support; ,EI:gLH
YG`?o
import org.rut.util.algorithm.SortUtil; kAo.C Nj7
o_$&XNC_
/** gi$XB}L+X
* @author treeroot I]9C_
* @since 2006-2-2 {$33B'wk
* @version 1.0 ^_W40/c3
*/ -{{[cTI
public class ImprovedMergeSort implements SortUtil.Sort { RV;!05^<
:$%>4+l
private static final int THRESHOLD = 10; ykmv'a$-4
v@n_F
/* pRrHuLj^
* (non-Javadoc) uR:rO^
* ]C!?HQ{bsf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?aWx(dVQ
*/ :o8MUXH$
public void sort(int[] data) { '!Wvqs
int[] temp=new int[data.length]; 9:8|)a(1
mergeSort(data,temp,0,data.length-1); EI1? GB)b
} [E|uY]DR
fd1C{^c
private void mergeSort(int[] data, int[] temp, int l, int r) { T$P-<s
int i, j, k; 5JSrrpGr
int mid = (l + r) / 2; x)oRSsv!Tr
if (l == r) "HK/u(z)
return; J'Sm0
if ((mid - l) >= THRESHOLD) :mZYS4L~
mergeSort(data, temp, l, mid); _ck[&Q
else #|f~s
insertSort(data, l, mid - l + 1); JN(-.8<
if ((r - mid) > THRESHOLD) uMd. j$$
mergeSort(data, temp, mid + 1, r); BJy;-(JP
else +>tUz D
insertSort(data, mid + 1, r - mid); Fr [7
;gB`YNL
for (i = l; i <= mid; i++) { yWb4Ify
temp = data; rQr!R$t/[
} ,Eu?JH&}u
for (j = 1; j <= r - mid; j++) { U(,.D}PG
temp[r - j + 1] = data[j + mid]; 3CZS)
} 6gU{(H
int a = temp[l]; "#4dW7E
int b = temp[r]; k;KdW P
for (i = l, j = r, k = l; k <= r; k++) { r\qz5G *6
if (a < b) { /.Q4~Hw%}
data[k] = temp[i++]; m4m<nnM
a = temp; DQ80B)<O
} else { N+g@8Q2s;5
data[k] = temp[j--]; goZ V.,w
b = temp[j]; <Ef[c@3
} h-QLV[^
} :Li/=>R^
} {vVTv SC
r:g9Z_
/** +ts0^;QO2{
* @param data D/ Dt
* @param l Vw~\H Gs/~
* @param i {' 5qv@3
*/ m;,xmEp
private void insertSort(int[] data, int start, int len) { 7wVH8^|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^4pto$#@O:
} rx!=q8=0R
} n7! H:{L
} [TTSA2
} WNy3@+@GZ
46No%cSiG
堆排序： A)NkT`<)
2`bdrRD0
package org.rut.util.algorithm.support; (K<9hL+X
l"pN90B4
import org.rut.util.algorithm.SortUtil; C+N k"l9
0.;}]v
/** Q8nId<$
* @author treeroot j6YiE~
* @since 2006-2-2 ]?LB?:6
* @version 1.0 zP)~a
*/ iiC!|`k"
public class HeapSort implements SortUtil.Sort{ D4u%6R|F
A :e;k{J
/* (non-Javadoc) h~}.G{"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l#qv 5f
*/ jvwwJ<K
public void sort(int[] data) { D E/:['
MaxHeap h=new MaxHeap(); E"PcrWB&
h.init(data); Xm!-~n@-m7
for(int i=0;i h.remove(); nJFg^s1
System.arraycopy(h.queue,1,data,0,data.length); egR-w[{
} QlZ@ To
^ c%N/V \
private static class MaxHeap{ {D`T0qPT[
osP\DiQ
void init(int[] data){ $l[Rh1z`;+
this.queue=new int[data.length+1]; ftbpqp'
for(int i=0;i queue[++size]=data; 01@t~v3!Z
fixUp(size); md Gwh7/3
} 04@cLDX8uB
} z\!K<d"Xv
X[3}?,aqL
private int size=0; Ip *g'
wdas1
private int[] queue; 3HC
CA s>AXbs
public int get() { ;H0{CkH
return queue[1]; ko$:DN
} 5Av=3[kh"%
:k=mzO<&
public void remove() { gAbD7SE
SortUtil.swap(queue,1,size--); A%bCMP
fixDown(1); +9A\HQ|22
} obH;g*
file://fixdown 47>>4_Hz
private void fixDown(int k) { aaW]JmRb
int j; ~$,qgf
while ((j = k << 1) <= size) { 4'>1HW
if (j < size %26amp;%26amp; queue[j] j++; _lxco=qd=%
if (queue[k]>queue[j]) file://不用交换 j?i#L}.I
break; S?0$?w?
SortUtil.swap(queue,j,k); oF&l-DHp
k = j; ,. EBOUW^
} gFN9jM
} uaPx"
private void fixUp(int k) { ^TdZ*($5
while (k > 1) { ~N0sJ%
int j = k >> 1; n# 7Pr/*0
if (queue[j]>queue[k]) |NFZ(6vNh
break; Ctu?o+^;z
SortUtil.swap(queue,j,k); y/_XgPfWU
k = j; SZU \i*
} 0y#Ih {L
} ;{Ux_JEg
Kq6jw/T
} mI1H!
45 >XKr.%
} chI.{Rj
PL=^}{r
SortUtil： @C8DZ5)
KLWDo%%u
package org.rut.util.algorithm; 0Q9T3X
)xU-;z0"~
import org.rut.util.algorithm.support.BubbleSort; 6;b9swmh
import org.rut.util.algorithm.support.HeapSort; XP?rOOn
import org.rut.util.algorithm.support.ImprovedMergeSort; $iw%(H
import org.rut.util.algorithm.support.ImprovedQuickSort; %yS3&Ju
import org.rut.util.algorithm.support.InsertSort; 3251Vq %
import org.rut.util.algorithm.support.MergeSort; 1R%1h9I4'
import org.rut.util.algorithm.support.QuickSort; G;iEo4\?
import org.rut.util.algorithm.support.SelectionSort; y'C-[nk
import org.rut.util.algorithm.support.ShellSort; @z`@f"l
Z}6^ve
/** aoW6U{\
* @author treeroot <yUstz,Xu^
* @since 2006-2-2 v $({C
* @version 1.0 V*[b}Xew
*/ afG{lWE)
public class SortUtil { ~.g3ukt
public final static int INSERT = 1; 8MwK.H[U
public final static int BUBBLE = 2; ?}QH=&=^
public final static int SELECTION = 3; DvXHK
public final static int SHELL = 4; #/S {6c
public final static int QUICK = 5; gXFWxT8S
public final static int IMPROVED_QUICK = 6; cI0 ]}S
public final static int MERGE = 7; d9^E.8p$
public final static int IMPROVED_MERGE = 8; 30j|D3-
public final static int HEAP = 9; \_6OCVil
,El!fgL
public static void sort(int[] data) { 2\D8.nQr
sort(data, IMPROVED_QUICK); ;t#]2<d*
} LJlZ^kh
private static String[] name={ aBuoHdg;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V&{MQWy
}; S_(d9GK<
>h~IfZU1
private static Sort[] impl=new Sort[]{ je,}_:7
new InsertSort(), = "ts`>
new BubbleSort(), +a@GHx4-
new SelectionSort(), }WLh8i?_
new ShellSort(), dI'SwnR
new QuickSort(), JH,/jR
new ImprovedQuickSort(), sYSLmUZ{
new MergeSort(), k"UO c=
new ImprovedMergeSort(), l:B;zi`)oB
new HeapSort() 1`0#HSO
}; #s-iy+/1oN
*Nb#W!
public static String toString(int algorithm){ [tT8_}v$LN
return name[algorithm-1]; LaFZ?7@|}
} 22hSove.
V<Z'(UI
public static void sort(int[] data, int algorithm) { T.e.{yO
impl[algorithm-1].sort(data); N3BL3:@O
} <!d"E@%v@
"8f?h%t
public static interface Sort { j V3)2C}
public void sort(int[] data); h!@,8y[B
} JtKp(k&
<i?a0
public static void swap(int[] data, int i, int j) { ^Mkk@F&1
int temp = data; `TqSQg_l
data = data[j]; Xf'=+f2p
data[j] = temp; `(y(w-:W1
} p&p.Q^"ok
} gJN0!N'