[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; th>yi)m
} {D_4~heF
int i1=l; * y"GgI
int i2=mid+1; Ar{=gENn
for(int cur=l;cur<=r;cur++){ 1rzq$,O
if(i1==mid+1) K]=>F
data[cur]=temp[i2++]; h0EGhJs
else if(i2>r) `peJ s~V
data[cur]=temp[i1++]; IUBps0.T\
else if(temp[i1] data[cur]=temp[i1++]; wx?{|
else } k%\
data[cur]=temp[i2++]; ~IN$hKg^
} B}xo|:f!zj
} {Z{NH:^
qh'f,#dI}
} H ]N/Y{
rF j)5~
改进后的归并排序: '<E8<bi
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package org.rut.util.algorithm.support; Wx\"wlJ7.3
x /Ky: Ky
import org.rut.util.algorithm.SortUtil; G cLp"
NByN}e
/** 9j>sRE1
* @author treeroot )9W#5V$
* @since 2006-2-2 ~uD;_Y=u)r
* @version 1.0 Q; /!oA_
*/ V{^fH6;[
public class ImprovedMergeSort implements SortUtil.Sort { !NY^(^
5Vm}<8{
private static final int THRESHOLD = 10; QCY{D@7T
!A<XqzV]
/* NS/L! "g
* (non-Javadoc) nO7o7bc
* (P!reYyM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y&I|m
*/ #$z-]i
public void sort(int[] data) { n|`):sP
int[] temp=new int[data.length]; %'~<:>:"E
mergeSort(data,temp,0,data.length-1); &CP@] pi9L
} .g`*cDW^=
8`*9jr
private void mergeSort(int[] data, int[] temp, int l, int r) { %D6Wlf+^n
int i, j, k; ~q%9zO'
int mid = (l + r) / 2; #RIfR7`T
if (l == r) <{).x6
return; s&_O2(l
if ((mid - l) >= THRESHOLD) 7JwWM2N?V
mergeSort(data, temp, l, mid); c(=O`%B{
else >wm$,%zk
insertSort(data, l, mid - l + 1); u~T$F/]k>
if ((r - mid) > THRESHOLD) H;!hp0y
mergeSort(data, temp, mid + 1, r); u2\qg;dP
else Fea\ eB
insertSort(data, mid + 1, r - mid); Jn[ K0GV
$5AtI$TV_!
for (i = l; i <= mid; i++) { ifCGNvDR
temp = data; _"Ke=v_5
} XI(@O)
for (j = 1; j <= r - mid; j++) { h swMy
temp[r - j + 1] = data[j + mid]; Tb6x@MorP
} "._WdY[
int a = temp[l]; +Y^F>/4=Y
int b = temp[r]; ^znv[
for (i = l, j = r, k = l; k <= r; k++) { [(UqPd$
if (a < b) { k{w^MOHNg
data[k] = temp[i++]; )Is*- W
a = temp; |g^W @.P
} else { s!!t
data[k] = temp[j--]; 9i[2z:4HJ
b = temp[j]; /lok3J:
} Gqc6).tn
} ;p"XCLHl
} 9i)mv/i
<ORz`^27o
/** =F-^RnO%\
* @param data Ln%_8yth
* @param l 10a*7 L
* @param i F"P:9`/
*/ c,%>7U(w_
private void insertSort(int[] data, int start, int len) { qtwmTT)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "J:NW_U
} )H,<i{80c
} M!DoR6
} nhhJUN?8
} s;f u
>-+X;0&
堆排序： s1apHwJ -
;-Dd\\)p
package org.rut.util.algorithm.support; S^n4aBm\+
}4MG114j
import org.rut.util.algorithm.SortUtil; sU!q~`; J
I}A#*iD
/** C:EoUu
* @author treeroot ?qW|k6{O
* @since 2006-2-2 hs uJ;4}$q
* @version 1.0 GV[BpH
*/ 8~+Msn:
public class HeapSort implements SortUtil.Sort{ XdVC>6
M_)T=s *
/* (non-Javadoc) vt=S0X^$yc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e|9Bzli{
*/ DNO%J^
public void sort(int[] data) { ebVfny$D
MaxHeap h=new MaxHeap(); mW9b~G3k
h.init(data); 6)j4 TH
for(int i=0;i h.remove(); raZRa*C;
System.arraycopy(h.queue,1,data,0,data.length); yiA\$mtO
} Di=6.gm[<
O]!DNN
private static class MaxHeap{ DcDGrRuh
Gukq}ZQd
void init(int[] data){ %LW~oI.
this.queue=new int[data.length+1]; ? D'-{/<4
for(int i=0;i queue[++size]=data; V-u\TiL
fixUp(size); t\0JNi$2
} m_f^#:
} &!MKqJ@t
;<rJ,X#
private int size=0; ]`m5!V_Y
h*%1Jkxu
private int[] queue; k_`S[
50`r}s}
public int get() { cIkLdh
return queue[1]; \bE~iz3b9
} svgi!=
qeGOSGc_
public void remove() { ~epkRO="
SortUtil.swap(queue,1,size--); gI{F"7fa=
fixDown(1); C`K/ai{4
} QKQy)g
file://fixdown akwVU\RP
private void fixDown(int k) { ArMe[t0$
int j; GMI>$$<
while ((j = k << 1) <= size) { a$A S?`L
if (j < size %26amp;%26amp; queue[j] j++; $6Psq=|
if (queue[k]>queue[j]) file://不用交换 i:To8kdO
break; `Y9@?s Q
SortUtil.swap(queue,j,k); D=]P9XDvb.
k = j; |.yRo_
} 2US8<sq+
} K~G^jAk+
private void fixUp(int k) { 0\A[a4crj
while (k > 1) { s5@^g8(+C
int j = k >> 1; W;W\L? r
if (queue[j]>queue[k]) !;oBvE7Kh
break; \t3i9#Q
SortUtil.swap(queue,j,k); GM~jR-FZ
k = j; ::w%rv
} kY&j~R[C
} !).dc.P
5j%jhby?
} E2cmT$6
I.x>mN-0
} %/p5C
K;O\Pd
SortUtil： ps[rYy
@m4d4K@
package org.rut.util.algorithm; nMqU6X>P!
NU"X*g-x^
import org.rut.util.algorithm.support.BubbleSort; Zs)9OJu
import org.rut.util.algorithm.support.HeapSort; +q!6zGs.
import org.rut.util.algorithm.support.ImprovedMergeSort; *2Kte'+q
import org.rut.util.algorithm.support.ImprovedQuickSort; oizoKwp%
import org.rut.util.algorithm.support.InsertSort; Dc5XU3Eu`
import org.rut.util.algorithm.support.MergeSort; ,0O!w>u_]J
import org.rut.util.algorithm.support.QuickSort; 6iOAYA=
import org.rut.util.algorithm.support.SelectionSort; n&lLC&dL
import org.rut.util.algorithm.support.ShellSort; -g9f3Be
i[swOYz]X
/** S]+}Zyg
* @author treeroot M_DkjuR
* @since 2006-2-2 54-x 14")
* @version 1.0 [a2/`ywdV
*/ ?g2K&
public class SortUtil { +=v|kd
public final static int INSERT = 1; A2 rRYzN;
public final static int BUBBLE = 2; B _ >|Mo/
public final static int SELECTION = 3; l!2.)F`x
public final static int SHELL = 4; TDFv\y}yc
public final static int QUICK = 5; y!].l0e2a
public final static int IMPROVED_QUICK = 6; oz--gA:g
public final static int MERGE = 7; oUH\SW8?
public final static int IMPROVED_MERGE = 8; 6$Y1[
public final static int HEAP = 9; 9dAsXEWh
mjpH)6aD0
public static void sort(int[] data) { #v1 4"sZ}
sort(data, IMPROVED_QUICK); ,wjL3c
} W\/0&H\i
private static String[] name={ .x&>H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X9>ujgK
}; Fc Cxr@
1RLSeT
private static Sort[] impl=new Sort[]{ 1JY4E2Q
new InsertSort(), @%K 8oYK
new BubbleSort(), m`|+_{4[n
new SelectionSort(), j56Y,Tm
new ShellSort(), Wl{Vz
new QuickSort(), uPpP")
new ImprovedQuickSort(), 6+>rf{5P7
new MergeSort(), ;Ti?(n#M>
new ImprovedMergeSort(), `|4{|X*U.
new HeapSort() 6FfDif
}; q~Ud>{
.%o:kq@B
public static String toString(int algorithm){ NGxuwHIQ8
return name[algorithm-1]; 8LOzL,Ah
} 94+#6jd e
??4QDa-
public static void sort(int[] data, int algorithm) { 5M3QRJ!
impl[algorithm-1].sort(data); 3N-(`[m{E
} 6 J#C
yq2Bz7P
public static interface Sort { Nt)9-\T
public void sort(int[] data); D6D*RTi4
} 9Rpj&0Is
m@~HHwj
public static void swap(int[] data, int i, int j) { /*[a>B4-q
int temp = data; V6c?aZ,O
data = data[j]; #RcmO**
data[j] = temp; z&eJ?wb
} jU=)4nx
} drH!?0Dpg