[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; Hr/Q?7g
} `q+Ug
int i1=l; 'J:xTp
int i2=mid+1; ?<~P)aVVj
for(int cur=l;cur<=r;cur++){ wj9Hh
if(i1==mid+1) `g'z6~c7n
data[cur]=temp[i2++]; Y*YV/E.
else if(i2>r) Z[9f8/6<b
data[cur]=temp[i1++]; seA=7c5E
else if(temp[i1] data[cur]=temp[i1++]; /OeOL3Y
else :s#&nY
data[cur]=temp[i2++]; YQaL)t$0
} %kL]-Z
} 9`G}GU]@}
!uN_<!
} FmhN*ZXr#
z6'l" D'h
改进后的归并排序: %$=}ePD
>:P-3#e*
package org.rut.util.algorithm.support; lQ|i Ws
+A<7:`sO
import org.rut.util.algorithm.SortUtil; #$v,.Yk
-bp7X{&
/** H#B97IGT
* @author treeroot s`o_ER
* @since 2006-2-2 A~#w gLGn
* @version 1.0 HfA@tZ5q|U
*/ :{x
public class ImprovedMergeSort implements SortUtil.Sort { z5 :53,`D'
W)2ZeH*
private static final int THRESHOLD = 10; 5Cl;h^R|m
9FmX^t$T
/* k[/`G5
* (non-Javadoc) W(jP??up
* Fr]B]Hj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "U iv[8B
*/ ~jM!8]=
public void sort(int[] data) { *!L it:H
int[] temp=new int[data.length]; 9+co`t.
mergeSort(data,temp,0,data.length-1); )U:W 9%
} _A=Pr_kN
QxeK-x^
private void mergeSort(int[] data, int[] temp, int l, int r) { H]&^>Pvh
int i, j, k; IGcYPL\&
int mid = (l + r) / 2; Q5/BEUkC
if (l == r) dS~#Lzm
return; .?;"iv+
if ((mid - l) >= THRESHOLD) lwp(Pq
mergeSort(data, temp, l, mid); 75RQ\_zDu
else p^9u8T4l1
insertSort(data, l, mid - l + 1); ^fT?(y_=e
if ((r - mid) > THRESHOLD) V"Y-|R
mergeSort(data, temp, mid + 1, r); !&@!:=X,
else cj9<!"6
insertSort(data, mid + 1, r - mid); )L%[(iI,x
{igVuZ(>en
for (i = l; i <= mid; i++) { ,-_\Y hY>
temp = data; VXIB9 /*i
} ?;?$\b=
for (j = 1; j <= r - mid; j++) { 8@d,TjJDo
temp[r - j + 1] = data[j + mid]; J G3#(DVc;
} 0ZjinWkR[
int a = temp[l]; dEWI8Q]
int b = temp[r]; 7~7_T#dTh
for (i = l, j = r, k = l; k <= r; k++) { m{C
if (a < b) { Q:sw*7"F
data[k] = temp[i++]; } 2P,Z6L
a = temp; LGF5yRk
} else { Uh8c!CA8:\
data[k] = temp[j--]; WR@TH bU
b = temp[j]; !(-S?*64l
} 9M!J7 W
} 1"P^!N
} B kWoK/f4
,]qTJ`J
/** ~x 0x.-^A
* @param data zTQTmO
* @param l NY9\a[[^[8
* @param i \oc*
*/ ew{(@p+$
private void insertSort(int[] data, int start, int len) { 2fv`O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +-+%6O<C
} :{ Q[kYj
} s6| S#
} l=?G"1
} WwBs_OMc
'k?*?XxG
堆排序： K|g+Wt^tQ
qKL mL2O
package org.rut.util.algorithm.support; Y}Gf%Xi,
,ThN/GkSC
import org.rut.util.algorithm.SortUtil; ir/-zp_
Q5~Y;0'
/** D?:AHj%gW
* @author treeroot <1(j&U
* @since 2006-2-2 =@EX!]=x
* @version 1.0 (h3f$
*/ Oj? |g_
public class HeapSort implements SortUtil.Sort{ *8?0vkZZ2
EmO{lCENk
/* (non-Javadoc) @0{vA\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =2rkaBFC
*/ 1?}5.*j<
public void sort(int[] data) { u|}p3-z|Y
MaxHeap h=new MaxHeap(); RC>79e/u<
h.init(data); qZz?i
for(int i=0;i h.remove(); !9ytZR*
System.arraycopy(h.queue,1,data,0,data.length); ub,GF?9
} SZ'2/#R>
[@LA<Z_
private static class MaxHeap{ N=[# "4I
}2nmfm!
void init(int[] data){ +P5\N,,7R
this.queue=new int[data.length+1]; %SHgXd#X
for(int i=0;i queue[++size]=data; v62M8r,Y
fixUp(size); dNg5#?mzT5
} ap y#8]
} XD=p:Ezh
1U(P0$C
private int size=0; WY)*3?
1x8zub B
private int[] queue; "0ZBPp1q
-h?ed'e/zz
public int get() { 6b6rM%B.oD
return queue[1]; EFqYEDXW
} u{+z?N
wYLi4jYm
public void remove() { 4ZAnq{nR4
SortUtil.swap(queue,1,size--); uKL4cr@
fixDown(1); @j/|U04_Z
} .Fe_Z)i>h
file://fixdown [W#M(`}D
private void fixDown(int k) { Y"dUxv1Ap
int j; ,VdNP
while ((j = k << 1) <= size) { e[ 9
if (j < size %26amp;%26amp; queue[j] j++; 2YV*U_\L
if (queue[k]>queue[j]) file://不用交换 oM~;du
break; Pv#>j\OR&
SortUtil.swap(queue,j,k); T}55ZpSC&
k = j; Z;qgB7-M
} ]8;2Oh
} 9ER!K
private void fixUp(int k) { A0f98?j^
while (k > 1) { Uxl7O4J@H
int j = k >> 1; A<$w }Fy;
if (queue[j]>queue[k]) de<T5/
break; ]b6gZ<
SortUtil.swap(queue,j,k); }S_#*N)i
k = j; iu9<]1k
} 5tG\5
} WH6Bs=G\}
bAVlL&^@|
} $YztLcn
)U5Ba^"fI
} ObyF~j}j
dtDT^~
SortUtil： zHu w[
\zMx~-2oN
package org.rut.util.algorithm; _Q=h3(ZI
w$1B|7tX;2
import org.rut.util.algorithm.support.BubbleSort; Ht_7:5v&
import org.rut.util.algorithm.support.HeapSort; |JVp(Kx
import org.rut.util.algorithm.support.ImprovedMergeSort; EjDr
import org.rut.util.algorithm.support.ImprovedQuickSort; qQ T^d
import org.rut.util.algorithm.support.InsertSort; E# UAC2Q
import org.rut.util.algorithm.support.MergeSort; 8[\~}Q6
import org.rut.util.algorithm.support.QuickSort; ^|j @' @L
import org.rut.util.algorithm.support.SelectionSort; VTIRkC wl@
import org.rut.util.algorithm.support.ShellSort; IL&;2%
'i5,2vT0
/** La9:qpj
* @author treeroot W0qn$H
* @since 2006-2-2 Hph$Z1{
* @version 1.0 Y-fDYMm
*/ |J:kL3g
public class SortUtil { \>N"{T
public final static int INSERT = 1; *:tfz*FG$G
public final static int BUBBLE = 2; L_{gM`UFc
public final static int SELECTION = 3; eX3|<Bf
public final static int SHELL = 4; ..a@9#D
public final static int QUICK = 5; `\Ye:$q
public final static int IMPROVED_QUICK = 6; {wwkbc*
public final static int MERGE = 7; <C{uodFll
public final static int IMPROVED_MERGE = 8; $s`#&.>c-
public final static int HEAP = 9; &++tp5
qtYVX:M@,
public static void sort(int[] data) { \s^4f#
sort(data, IMPROVED_QUICK); t=BXuFiu
} DNmP>~
private static String[] name={ {O"N2W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \_|g}&}6Y
}; rOA{8)jIa*
< s1
private static Sort[] impl=new Sort[]{ L/*K4xQ
new InsertSort(), ''3b[<
new BubbleSort(), Q=n2frW(T
new SelectionSort(), .\}nDT
new ShellSort(), W~Ae&gcn#
new QuickSort(), v FWg0 $,
new ImprovedQuickSort(), ]!'9Y}9a
new MergeSort(), 7j~}M(s"
new ImprovedMergeSort(), &{zRuF
new HeapSort() (>M? iB
}; R!y`p:O C
ka?EXF:
public static String toString(int algorithm){ KbM1b
return name[algorithm-1]; u.9syr
} "*JyNwf
RElIWqgY
public static void sort(int[] data, int algorithm) { ujan2'YT
impl[algorithm-1].sort(data); =QJI_veUG`
} /?_5!3KJ
<&MY/vV
public static interface Sort { F*J@OY8i
public void sort(int[] data); ,]H2F']4Z
} :V ZXI#([
Z,JoxK2"
public static void swap(int[] data, int i, int j) { G-Dc(QhU&
int temp = data; b 67l\L
data = data[j]; cu )w6!f
data[j] = temp; wq =Ef
} e763yd
} (Y:?qy