[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; `e[S Zj\
} "*g+qll!5d
int i1=l; X/_I2X
int i2=mid+1; AtT7~cVe
for(int cur=l;cur<=r;cur++){ 86&M Zdv6
if(i1==mid+1) KK|w30\f
data[cur]=temp[i2++]; QcegT/vO
else if(i2>r) 0K!3Ny9(
data[cur]=temp[i1++]; eJDZ|$
else if(temp[i1] data[cur]=temp[i1++]; z^Hc'oVXj:
else 0<M-asI?
data[cur]=temp[i2++]; W.wPy@yi
} $8EEtr,!
} P.~UUS
HC`0Ni1
} 5Xy(za
;(Yb9Mr)z
改进后的归并排序: MK< y$B{}
('J/Ww<
package org.rut.util.algorithm.support; o3WOp80hz
/:|vJ|dJ
import org.rut.util.algorithm.SortUtil; >P6"-x,["
awLvLkQb{
/** a~o<>H
* @author treeroot I&PJ[U#~a
* @since 2006-2-2 )f8>kz(
* @version 1.0 u@a){A(P
*/ y\Wn:RR1[
public class ImprovedMergeSort implements SortUtil.Sort { _H]\
@T1G#[C~t
private static final int THRESHOLD = 10; ]m1fo'
UpoSC
/* # :+Nr
* (non-Javadoc) Y,]Lk<Hm3
* /2^L;#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "2%z;!U1
*/ aq,1'~8XR
public void sort(int[] data) { xC76jE4
int[] temp=new int[data.length]; 0TN28:hcD
mergeSort(data,temp,0,data.length-1); (P>nA3:UXB
} *,u3Wm|7
,05PYBc3
private void mergeSort(int[] data, int[] temp, int l, int r) { y<`5
int i, j, k; LKN7Lkl
int mid = (l + r) / 2; @2(u=E:^
if (l == r) MGdzrcF
return; "M%R{pGA7
if ((mid - l) >= THRESHOLD) D?Oe";"/
mergeSort(data, temp, l, mid); ]4~Yi1]
else +IZ=E >a
insertSort(data, l, mid - l + 1); n,T &n
if ((r - mid) > THRESHOLD) VFE@qX|
mergeSort(data, temp, mid + 1, r); |3$Ew.
else _kKG%U.gbK
insertSort(data, mid + 1, r - mid); Y;w|Fvjj+
44CZl{pt
for (i = l; i <= mid; i++) { [8ZDMe
temp = data; jaS<*_~#R
} oXo>pl
for (j = 1; j <= r - mid; j++) { ~M~DH-aX
temp[r - j + 1] = data[j + mid]; 5SFr E`
} }G4I9Py
int a = temp[l]; If'q8G3]-
int b = temp[r]; }:$cK(|
for (i = l, j = r, k = l; k <= r; k++) { ?;~!C2Zs
if (a < b) { 2H%9l@}u
data[k] = temp[i++]; ` w;Wud'*<
a = temp; 14$%v;Su4
} else { \p^V~fy7rU
data[k] = temp[j--]; G1|1Z5r
b = temp[j]; i0M6;W1T
} Lf_Y4a#
} n%Oi~7>
} ^^q&VL
%:26v
/** (Cr
* @param data {lK2yi
* @param l <ZT C^=3
* @param i eP~bl
*/ 4Kqo>|C
private void insertSort(int[] data, int start, int len) { ]($ \7+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); YS3~sA
} WZa6*pF
} -TD\?Q
} s|IBX0^@
} @$slGY
]9!y3"..W{
堆排序： SIK:0>yK"
0E\#!L
package org.rut.util.algorithm.support; Q#MB=:0{
4!sK>l!
import org.rut.util.algorithm.SortUtil; &l6@C3N$
av'DyNW\
/** CU=sQfE
* @author treeroot D5gj*/"
* @since 2006-2-2 `%YMUBaI
* @version 1.0 ?N4FB*x
*/ .!q_jl%U
public class HeapSort implements SortUtil.Sort{ coCT]<
Kp7DI0~
/* (non-Javadoc) Kebr>t8^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hpf0fU
*/ ,#;hI{E
public void sort(int[] data) { MkW=sD_
MaxHeap h=new MaxHeap(); V7,dx@J-
h.init(data); <F^9ML+'
for(int i=0;i h.remove(); \Zf=A[
System.arraycopy(h.queue,1,data,0,data.length); ByqVNz0L
} QC'Ru'8S
i]n2\v AG
private static class MaxHeap{ /? %V% n
I`{3I-E
void init(int[] data){ xLed];2G
this.queue=new int[data.length+1]; GR|\OJ<2
for(int i=0;i queue[++size]=data; P!-RZEt$
fixUp(size); b5MBzFw
} bo<P%$(D
} HMVP71
h6k" D4o\
private int size=0; -1Tr!I:1
AL":j6!OQ
private int[] queue; 20I`F>-*
&G2&OFAr]q
public int get() { )>2L(~W
return queue[1]; n1%2sV)>
} a&{Y~Og?%
%NQ mV_1
public void remove() { (uX?XX^
SortUtil.swap(queue,1,size--); {.Qv1oOa
fixDown(1); 4T@+gy^.
} a~Dk@>+P>
file://fixdown =]%,&Se
private void fixDown(int k) { /KvJjt'8
int j; _1[Wv?
while ((j = k << 1) <= size) { brp3xgQ`]
if (j < size %26amp;%26amp; queue[j] j++; gaN/ kp
if (queue[k]>queue[j]) file://不用交换 uD/@d'd_4L
break; z5gVP8*z5
SortUtil.swap(queue,j,k); ]Ea-MeH
k = j; JDf>Qg{
} 7:B/?E
} xHt7/8wF
private void fixUp(int k) { 4Q!A w
while (k > 1) { m 3UK`~ji
int j = k >> 1; \k5"&]I3
if (queue[j]>queue[k]) {9(0s| pr
break; -ED} 6E
SortUtil.swap(queue,j,k); (F^R9G|
k = j; dC,C[7\
} 5r)8MklZ
} R?u(aY)P
a/uo)']B
} %Bw:6Y4LZ
xc*a(v0
} q\@_L.tc[
&]YyV.
SortUtil： Ck#e54gJX
T1q27I
package org.rut.util.algorithm; $y6 <2w%b
U;/2\Ii
import org.rut.util.algorithm.support.BubbleSort; QM8Ic,QFvo
import org.rut.util.algorithm.support.HeapSort; w71YA#cg
import org.rut.util.algorithm.support.ImprovedMergeSort; tAq0Z)
import org.rut.util.algorithm.support.ImprovedQuickSort; T9R#.y,
import org.rut.util.algorithm.support.InsertSort; .K84"Gdx
import org.rut.util.algorithm.support.MergeSort; mhVLlbY|t
import org.rut.util.algorithm.support.QuickSort; :%& E58
import org.rut.util.algorithm.support.SelectionSort; -TVwoK
import org.rut.util.algorithm.support.ShellSort; I;Mm+5A
)Xqjl
/** g*a+$'
* @author treeroot PP{9Y Vr
* @since 2006-2-2 P@PF"{S
* @version 1.0 _cvX$(Sg
*/ |kK5:\H
public class SortUtil { 8\68NG6o
public final static int INSERT = 1; WP*}X7IS
public final static int BUBBLE = 2; tx7 zG.,
public final static int SELECTION = 3; 2*Qi4%s#
public final static int SHELL = 4; $ (;:4
public final static int QUICK = 5; RWv4/=}(G
public final static int IMPROVED_QUICK = 6; cW>=/
public final static int MERGE = 7; ef^GJTv&k
public final static int IMPROVED_MERGE = 8; pMT7/y-
public final static int HEAP = 9; ~bkO8tn
7Tk//By7
public static void sort(int[] data) { kJmwR
sort(data, IMPROVED_QUICK); lIS`_H}
} zHA::6OgPN
private static String[] name={ nHm29{G0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l6#Y}<tq
}; _%R^8FjH*
7)QZ<fme
private static Sort[] impl=new Sort[]{ Xuu&`U~%
new InsertSort(), ..5~x~O
new BubbleSort(), Hk;;+'-
new SelectionSort(), W6T4Zsg
new ShellSort(), KO=$Hr?f;
new QuickSort(), G+N1#0,q
new ImprovedQuickSort(), ^85Eveu
new MergeSort(), Soq#cl'll-
new ImprovedMergeSort(), <qfAW?tF
new HeapSort() %W9R08`
}; l,lqhq\
\{`^Q+<
public static String toString(int algorithm){ qK7:[\T|?T
return name[algorithm-1]; .Pj<Pe
} !O%!A<3
8<"g&+T
public static void sort(int[] data, int algorithm) { ZeuL*c \
impl[algorithm-1].sort(data); joskKik^
} W]/J]O6
;*Vnwt A
public static interface Sort { qdI%v#'M
public void sort(int[] data); _!1LV[x!s
} ;>mM9^Jaf
Ic4#Tk20i
public static void swap(int[] data, int i, int j) { ?Fx~_GT
int temp = data; hhaiHi!$
data = data[j]; ^P@:CBO
data[j] = temp; 'UhHcMh:
} Fn.JtIu
} _|["}M"?