[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; d-Vttxa6
} c,nE@~ul2
int i1=l; Hx[YHu KL^
int i2=mid+1; ax$ashFO/!
for(int cur=l;cur<=r;cur++){ ~< %%n'xmm
if(i1==mid+1) l,j7I3&~%
data[cur]=temp[i2++]; KvENH=oh
else if(i2>r) J'c]':U
data[cur]=temp[i1++]; \d$fi*{
else if(temp[i1] data[cur]=temp[i1++]; .l?sYe64S
else C+ar]Vi
data[cur]=temp[i2++]; " &2Kvsz
} "D#+:ix8G|
} 91%QO?hz
BSt^QH-'
} uYVlF@]
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改进后的归并排序: IzVb
s2=rj?g&(X
package org.rut.util.algorithm.support; "(bnr0
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import org.rut.util.algorithm.SortUtil; Xc"l')1H
3!E*h0$}
/** ZL/iX~}a'
* @author treeroot o 4G%m>$
* @since 2006-2-2 -]yM<dP
* @version 1.0 8R?X$=$]!.
*/ "Bl]_YPv
public class ImprovedMergeSort implements SortUtil.Sort { ;e,_F/@`
x(oL\I_Z
private static final int THRESHOLD = 10; to9~l"n.s
!p$HS0c
/* P^9y0Q
* (non-Javadoc) }-YM>q
* JSz;>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pG"pvfEl9f
*/ yOR]r+8
public void sort(int[] data) { b(^/WCykH
int[] temp=new int[data.length]; W^j;"qj
mergeSort(data,temp,0,data.length-1); Mttt]]
} 2ZTz{|y
ToMvP B);
private void mergeSort(int[] data, int[] temp, int l, int r) { zT$-%
int i, j, k; 4lrF{S8
int mid = (l + r) / 2; |v,%!ps
if (l == r) 9N1Uv,OtB
return; matW>D;J
if ((mid - l) >= THRESHOLD) h-r\1{Q1]
mergeSort(data, temp, l, mid); r{NCI
else P5$d#Y(=
insertSort(data, l, mid - l + 1); $sF'Sr{)y
if ((r - mid) > THRESHOLD) \dvzL(,
mergeSort(data, temp, mid + 1, r); BK>3rjXi>a
else {jz?LM
insertSort(data, mid + 1, r - mid); O^|:q
D{'>G@nLQ
for (i = l; i <= mid; i++) { J,N='~kfh
temp = data; Nr~9] S
} z~Zu>Q1u[
for (j = 1; j <= r - mid; j++) { d^uE4F}
temp[r - j + 1] = data[j + mid]; ,Dh+-}
} KX8$j$yW
int a = temp[l]; FPAy.cljJ
int b = temp[r]; Qm9r>m6p@N
for (i = l, j = r, k = l; k <= r; k++) { >ZRCM
if (a < b) { {#?$p i[
data[k] = temp[i++]; >O0z+tj
a = temp; J)R2O{z
} else { _(A9k{
data[k] = temp[j--]; 2;8I0BH*'
b = temp[j]; [l~Gwaul>
} ;MSdTHN"
} (]cM;
} VtM:~|v
)|52B;yZx
/** GFA D
* @param data W^U6O&-K
* @param l kdmmfw
* @param i :Q\Es:y
*/ UXs=7H".
private void insertSort(int[] data, int start, int len) { v67utISNI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @:2<cn`
} op!ft/Yyb
} :vsBobiJ
} |:qaF
} 1#nR$
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堆排序： XFj\H(D
3)D'Yx
package org.rut.util.algorithm.support; o`tOnwt
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import org.rut.util.algorithm.SortUtil; aC!e#(q
@^q|C&j
/** ;i;2cq
* @author treeroot ucP"<,a
* @since 2006-2-2 <H; z4
* @version 1.0 b\{34z,
*/ =`&7pYd,
public class HeapSort implements SortUtil.Sort{ :A,g:B
LgG7|\(-
/* (non-Javadoc) FCr^D$_w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -_%8Q#"
*/ 5yA1<&z
public void sort(int[] data) { 3EY>XS
MaxHeap h=new MaxHeap(); 30BFwNE
h.init(data); QaVxP1V#U
for(int i=0;i h.remove(); oRg,oy
System.arraycopy(h.queue,1,data,0,data.length); Cd6th F)
} 33~8@]b
z'O+B}
private static class MaxHeap{ k1P'Q&Na
qMA";Frt3N
void init(int[] data){ kPAg*
this.queue=new int[data.length+1]; rY@9nQ\>g
for(int i=0;i queue[++size]=data; {+5Ud#\y
fixUp(size); Q_0_6,Opb
} 23'<R i
} _2<UcC~
4Xwb`?}-
private int size=0; nHZhP4W
E*,nKJu'r
private int[] queue; 6u`$a&dR'l
A|U0e`Iw
public int get() { nC?Lz1re
return queue[1]; 8`1]#Vw
} `]l|YQz\
a>d`g
public void remove() { +`$$^x
SortUtil.swap(queue,1,size--); ])?h~
fixDown(1); w~=xO_%
} GlC(uhCpV
file://fixdown *L Y6hph"
private void fixDown(int k) { OOABn*
int j; Fs=)*6}&
while ((j = k << 1) <= size) { X68.*VHh0
if (j < size %26amp;%26amp; queue[j] j++; Ty7`&
if (queue[k]>queue[j]) file://不用交换 F$:UvW@e1
break; JnqP`kYbTE
SortUtil.swap(queue,j,k); LZ&I<ID`-
k = j; udc9KuR@
} 1#fR=*ZM"
} X1[zkb
private void fixUp(int k) { p"H/N_b4
while (k > 1) { cT&lkS
int j = k >> 1; O69TU[Vn
if (queue[j]>queue[k]) ~*^o[~x]\
break; c@nh>G:y{&
SortUtil.swap(queue,j,k); %uiCC>cC
k = j; ,R7j9#D
} Fo~q35uB
} 4L97UhLL
F~OQ'59!Pf
} @`^Z5n.4
?s)6 YF
} -QBM^L
;K4uu<e\
SortUtil： 6o(.zk`d
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package org.rut.util.algorithm; k;SKQN
%503<j
import org.rut.util.algorithm.support.BubbleSort; n!Y}D:6c6
import org.rut.util.algorithm.support.HeapSort; xbHI4A"Z
import org.rut.util.algorithm.support.ImprovedMergeSort; X%B$*y5
import org.rut.util.algorithm.support.ImprovedQuickSort; e5;YY
import org.rut.util.algorithm.support.InsertSort; &h7 n>q
import org.rut.util.algorithm.support.MergeSort; b+f '
import org.rut.util.algorithm.support.QuickSort; q& KNK
import org.rut.util.algorithm.support.SelectionSort; W?ghG
import org.rut.util.algorithm.support.ShellSort; VyNU<}
Es\J%*\u
/** DPmY_[OAE
* @author treeroot .vi0DuD6
* @since 2006-2-2 +;oR_]l
* @version 1.0 }6{00er
*/ 8f%OPcr&
public class SortUtil { WOeLn[
public final static int INSERT = 1; _c:th{*
public final static int BUBBLE = 2; ,KPrUM}
public final static int SELECTION = 3; Yg2P(
public final static int SHELL = 4; R;&k/v
public final static int QUICK = 5; g1l:k1\Ht
public final static int IMPROVED_QUICK = 6; Z^WI~B0nt
public final static int MERGE = 7; e~R_bBQ0
public final static int IMPROVED_MERGE = 8; a6It1%a+
public final static int HEAP = 9; MFWkJbZV
N1x~-2(
public static void sort(int[] data) { i2[8^o`_
sort(data, IMPROVED_QUICK); ,&* BhUC
} '9&@?P;
private static String[] name={ <'hoN/g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \DD4=XGA
}; (b"q(:5oX
#~w~k+E4
private static Sort[] impl=new Sort[]{ g~9b_PY9
new InsertSort(), ^bdXzjf
new BubbleSort(), 6Tm7|2R
new SelectionSort(), )?LZg<<
new ShellSort(), >dwWqcP
new QuickSort(), hwi_=-SL
new ImprovedQuickSort(), pm[i#V<v
new MergeSort(), 66_=bd(9
new ImprovedMergeSort(), |X6R2I
new HeapSort() Rz*GRe
}; 6 lEv<)cC
%ca`v;].
public static String toString(int algorithm){ 6J$I8b#/
return name[algorithm-1]; ]Qp-$)N
} P/q] u
g$/7km{TP
public static void sort(int[] data, int algorithm) { pRjrMS
impl[algorithm-1].sort(data); wqzpFPk(
} hx:^xW@r4P
QWC C
public static interface Sort { A.$P1zwC
public void sort(int[] data); 1jPh0?BY
} l=$?#^^ /
Wk!<P" nHd
public static void swap(int[] data, int i, int j) { ?@6Zv$vZ
int temp = data; taO(\FOm
data = data[j]; >S{8sN
data[j] = temp; NJQy*~P
} EV|W:;Sg
} _[wG-W/9R