[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; 4oCnF+(
} x4fLe5xv
int i1=l; vUJb-
int i2=mid+1; {:fyz#>>^
for(int cur=l;cur<=r;cur++){ bQ_i&t\yzB
if(i1==mid+1) Fa@#nY|UV3
data[cur]=temp[i2++]; &a1agi7M
else if(i2>r) DlTV1X-^1
data[cur]=temp[i1++]; 8+`cv"
else if(temp[i1] data[cur]=temp[i1++]; Qb9) 1
else vzs6YsA
data[cur]=temp[i2++]; SyTcp?H
} )]rGGNF*
} R%}OZJ_
Jd/5Kx
} h&[!CtPm
)V~<8/)
改进后的归并排序: 4AUY8Pxp
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package org.rut.util.algorithm.support; ])0&el3-
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import org.rut.util.algorithm.SortUtil; 7;c{lQOj}
^8E/I]-
/** 'X{7b <
* @author treeroot awo=%vJ&
* @since 2006-2-2 b(K.p?bt
* @version 1.0 3{~hRd
*/ (r:WG!I,
public class ImprovedMergeSort implements SortUtil.Sort { SlsMMD
l&5| =
private static final int THRESHOLD = 10; N4'b]:`n
vy6NH5Q
/* >0B[
* (non-Javadoc) p8o%H-Xk
* }?8KFe7U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R3%T}^;f
*/ $ 'HiNP {c
public void sort(int[] data) { {h|3P/?7
int[] temp=new int[data.length]; ;%Jp@'46
mergeSort(data,temp,0,data.length-1); QMHeU>
} m,qU})
;/>~|@
private void mergeSort(int[] data, int[] temp, int l, int r) { G2rxr
int i, j, k; SO8Ej)m
int mid = (l + r) / 2; Po93&qE
if (l == r) EtN"K-X
return; o]PSyVg
if ((mid - l) >= THRESHOLD) Nf1) 5
mergeSort(data, temp, l, mid); }evc]?1(
else In:h%4>
insertSort(data, l, mid - l + 1); $kkdB,y
if ((r - mid) > THRESHOLD) F1gDeLmJ
mergeSort(data, temp, mid + 1, r); kax9RHvku
else {I`B?6K5
insertSort(data, mid + 1, r - mid); Iu%/~FgPj{
ApjLY58=
for (i = l; i <= mid; i++) { X!nI{PE
temp = data; [Zi\L>PHO
} Y==# yNwM
for (j = 1; j <= r - mid; j++) { SAly~(r?/
temp[r - j + 1] = data[j + mid]; |M0 XLCNd_
} goWD~'\
int a = temp[l]; +1F@vag7
int b = temp[r]; dax|4R
for (i = l, j = r, k = l; k <= r; k++) { k$3.FO"
if (a < b) { c-z=(Z
data[k] = temp[i++]; @DY0Lz;
a = temp; v>7tJ[s
} else { Pr@EpO
data[k] = temp[j--]; e7pN9tXGf
b = temp[j]; B_c(3n-"
} g 9>p?XY
} &> }MoB
} W $H8[G
]N2'L!4|;
/** `[57U,v
* @param data ;,@3bu>r
* @param l Ba!`x<wa
* @param i YVD%GJ
*/ UU$ +DL
private void insertSort(int[] data, int start, int len) { plb'EP>e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G@ed2T
} ;bkS0Vmg
} E(8O3*=
} =]U[
} V4/eGh_T
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堆排序： F''4j8
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package org.rut.util.algorithm.support; Xqf"Wx(X
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import org.rut.util.algorithm.SortUtil; 1[u{3lQ
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/** !OC?3W:^_
* @author treeroot |) THuE(
* @since 2006-2-2 G'}%m;-mt
* @version 1.0 .E[k}{k,
*/ ;2#HM^Mu
public class HeapSort implements SortUtil.Sort{ ax'Dp{Q
kZPj{^c:
/* (non-Javadoc) cg0L(oI~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) in(n[K
*/ P8z++h
public void sort(int[] data) { c\]h YKA
MaxHeap h=new MaxHeap(); 89+m?H]K
h.init(data); 9FH=Jp
for(int i=0;i h.remove(); 93[`1_q7\
System.arraycopy(h.queue,1,data,0,data.length); LOR$d^l
} BU]9eF!>h
@*A(#U8p3
private static class MaxHeap{ O_(J',++
1B,RRHXn6
void init(int[] data){ Kd7OnU
this.queue=new int[data.length+1]; Ca?pK_Y
for(int i=0;i queue[++size]=data; AO>K 6{
fixUp(size); C0KP,JS&
} /`:5#O
} 2$\Du9+
sN^R Z0!>
private int size=0; w}oH]jVKL6
k3^S^Bv\
private int[] queue; ~`8`kk8
aMh2[I
public int get() { evu@uq
return queue[1]; @qg=lt|(F
} 6i{W=$RQ
"1h|1'S50?
public void remove() { wR>\5z)^
SortUtil.swap(queue,1,size--); d=H C;T)
fixDown(1); rs 7R5 F
} ExY ~.
file://fixdown ]>*Z 1g;
private void fixDown(int k) { o5. q
int j; 1w1(FpQO.
while ((j = k << 1) <= size) { 7tit>dJ
if (j < size %26amp;%26amp; queue[j] j++; j/dNRleab
if (queue[k]>queue[j]) file://不用交换 ~(4cnD)BO
break; a;([L8^7$l
SortUtil.swap(queue,j,k); MLId3#Q
k = j; ?ry`+nx
} jJ|O]v$N
} V4ayewVX
private void fixUp(int k) { Y/)>\
while (k > 1) { F9-xp7T
int j = k >> 1; UT]LF#.(
if (queue[j]>queue[k]) AqE . TK
break; pPeS4$Y
SortUtil.swap(queue,j,k); b.;F)(
k = j; VY Va8[}
} ]?b#~
} U1J?o#(
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} p>65(&N,
PHZA?>Q7Z
} <EJ}9`t
R279=sO,J
SortUtil： *,@dt+H!y
1Cp5a2{
package org.rut.util.algorithm; A;q}SO%b
!);'Bk9o
import org.rut.util.algorithm.support.BubbleSort; 5?%(j!p5
import org.rut.util.algorithm.support.HeapSort; /< h~d
import org.rut.util.algorithm.support.ImprovedMergeSort; 4~DFtWbf
import org.rut.util.algorithm.support.ImprovedQuickSort; /&cb`^"U^
import org.rut.util.algorithm.support.InsertSort; ?_}[@x
import org.rut.util.algorithm.support.MergeSort; X0Xs"--}
import org.rut.util.algorithm.support.QuickSort; [bH6>{3u
import org.rut.util.algorithm.support.SelectionSort; "4oY F:h
import org.rut.util.algorithm.support.ShellSort; OUS@)Tyh
;~#rdL
/** f9X*bEl9;`
* @author treeroot :TX!lbCq
* @since 2006-2-2 )TBBYCL3
* @version 1.0 >Vn;1|w
*/ 28>gAz.#
public class SortUtil { ]k " j
public final static int INSERT = 1; 9ZeTS~i
public final static int BUBBLE = 2; AQQeLdTq
public final static int SELECTION = 3; : H0+}=
public final static int SHELL = 4; w=e~ M
public final static int QUICK = 5; _<yJQ|[z~i
public final static int IMPROVED_QUICK = 6; Qt+ K,LY
public final static int MERGE = 7; Gt2NUGU
public final static int IMPROVED_MERGE = 8; gj0gs
public final static int HEAP = 9; g3Xq@RAJc
jDqe)uVvtV
public static void sort(int[] data) { HYZ94[Ti
sort(data, IMPROVED_QUICK); (6L[eWuTn
} 0x4p!5
private static String[] name={ )apqL{u:=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R%"wf
}; Ma2sQW\
Y?{L:4cRX
private static Sort[] impl=new Sort[]{ nX7{09
new InsertSort(), Dny5X.8
new BubbleSort(), 4'cdV0]
new SelectionSort(), f-E]!\Pg
new ShellSort(), *&Np;^~
new QuickSort(), XkDjA#nx`
new ImprovedQuickSort(), ]bz']`
new MergeSort(), GKTrf\"c
new ImprovedMergeSort(), b*+Od8r
new HeapSort() %oJ_,m_(
}; se:]F/
/bjyV]N
public static String toString(int algorithm){ NldeD2~H
return name[algorithm-1]; =6y4*f
} /. k4Y
d3v5^5kU
public static void sort(int[] data, int algorithm) { }te\) Yk.N
impl[algorithm-1].sort(data); Uf}s6#
} U3}r.9/
u]lf~EE
public static interface Sort { Ghs{B8
public void sort(int[] data); C!6?.\U/:c
} P:eY>~m<;
(j@3=-%6G
public static void swap(int[] data, int i, int j) { 0 XxU1w8\V
int temp = data; s"7wG!yf
data = data[j]; w] i&N1i
data[j] = temp; 56Z 1jN^U
} B[%FZm$`M
} oKLL~X>!U