[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; S"iz fQ@
} T=|oZ
int i1=l; 'G!w0yF
int i2=mid+1; \h DH81L
for(int cur=l;cur<=r;cur++){ LB|FVNW/S
if(i1==mid+1) p-H q\DP
data[cur]=temp[i2++]; ).0h4oHSj
else if(i2>r) R!i9N'gGG(
data[cur]=temp[i1++]; cCd2f>EHw
else if(temp[i1] data[cur]=temp[i1++]; );*A$C9RA
else `Tx1?]
data[cur]=temp[i2++]; :bxq%D%|o
} LY%`O#i.
} Cebl"3Q
x;,H>!r"i
} ]urrAIK
^d!(8vh
改进后的归并排序: YPraf$
`k}
package org.rut.util.algorithm.support; 85P7I=`*d
T/#$44ub
import org.rut.util.algorithm.SortUtil; HF9d~7R
}5Yd:%u5
/** jFBLElE
* @author treeroot )6# i>c-
* @since 2006-2-2 8'Eu6H&$G
* @version 1.0 !xm87I
*/ $F!)S
public class ImprovedMergeSort implements SortUtil.Sort { ;Jex#+H(:D
V&x6ru#
private static final int THRESHOLD = 10; 6vrMR&#a
"pb,|U
/* IG?044Y
* (non-Javadoc) L3^WI( 8m
* DW^E46k)A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t =ErJ
*/ LEoL6ga
public void sort(int[] data) { #WD}XOA
int[] temp=new int[data.length]; fHek!Jv.
mergeSort(data,temp,0,data.length-1); k\UDZ)TQV
} >y%*HC!G
d^"<Tz!
private void mergeSort(int[] data, int[] temp, int l, int r) { 2<jbNnj
int i, j, k; KXEDpr
int mid = (l + r) / 2; I4kN4*d!N,
if (l == r) tH0=ysf
return; (^-i[aJY
if ((mid - l) >= THRESHOLD) VY)!bjW.
mergeSort(data, temp, l, mid); n22k<@y
else KS($S(Fi
insertSort(data, l, mid - l + 1); w,(e,8#:
if ((r - mid) > THRESHOLD) )K2,h5zU
mergeSort(data, temp, mid + 1, r); F0O"rN{
else <S'5`-&
insertSort(data, mid + 1, r - mid); EGYYSoBLU
{FO>^~>l
for (i = l; i <= mid; i++) { 6$TE-l
temp = data; xWX1P%`
} jX5lwP Q|F
for (j = 1; j <= r - mid; j++) { nmlQ-V-
temp[r - j + 1] = data[j + mid]; : [o0Va2 d
} k23*F0Dv
int a = temp[l]; sfSM7f
int b = temp[r]; tSK{Abw1B
for (i = l, j = r, k = l; k <= r; k++) { .!T]sX_P
if (a < b) { R9X*R3nB
data[k] = temp[i++]; ,&S:(b[D
a = temp; +Z0@z^6\
} else { )jbYWR*&
data[k] = temp[j--]; N5u.V\F!z\
b = temp[j]; L4I1nl
} zG|}| //}
} rtr0 d
} \; Io
deR2l(0%yr
/** 4R5+"h:
* @param data V:*QK,
* @param l M#II,z>q
* @param i 9V*h:[6a(
*/ ZSj^\JU
private void insertSort(int[] data, int start, int len) { Ky33h 0TX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z}v6!u|iZu
} 5bZf$$b
} y>T:fu
} j8*fa
} /PbN!r<1
{7!WtH;-
堆排序： )En*5-1
,"!t[4p=f
package org.rut.util.algorithm.support; eC:?j`H-
FBpf_=(_1
import org.rut.util.algorithm.SortUtil; B`,4M&
2 F3U,}
/** |) {)w`
* @author treeroot s u]x
* @since 2006-2-2 J1kG'cH05
* @version 1.0 @Y":DHF5q
*/ Y>*{(QD
public class HeapSort implements SortUtil.Sort{ AL%H$I
<`8l8cL
/* (non-Javadoc) %;+Q0 e9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o@6:|X)7
*/ T/Q#V)Tp
public void sort(int[] data) { 7Pu.<b}
MaxHeap h=new MaxHeap(); r=YprVX
h.init(data); 0U'g2F>{
for(int i=0;i h.remove(); 0`:B#ten
System.arraycopy(h.queue,1,data,0,data.length); #w3cImgp2
} u!TVvc
L=W8Q8hf
private static class MaxHeap{ [5$=G@ zf
K@u\^6419
void init(int[] data){ Yoy}Zdu}h
this.queue=new int[data.length+1]; _Wn5* Pi%Z
for(int i=0;i queue[++size]=data; -gZI^EII
fixUp(size); Qzbelt@Wx
} !"{+|heU9p
} p3Uus''V4
71i".1l{K
private int size=0; t>[K:[0U
~Ti
private int[] queue; "I.PV$Rxl
JR='c)6:
public int get() { yM(zc/?
return queue[1]; >,22@4
} <t[WHDO`
S'"(zc3=
public void remove() { :_F$e
SortUtil.swap(queue,1,size--); L7i^?40
fixDown(1); L=zt\L
} e>W}3H5w0
file://fixdown zRDBl02v$T
private void fixDown(int k) { ^DZ(T+q,
int j; #?h#R5:0
while ((j = k << 1) <= size) { =bm<>h7.)
if (j < size %26amp;%26amp; queue[j] j++; z>HeM Mei
if (queue[k]>queue[j]) file://不用交换 N- E)b
break; Dg](?^
SortUtil.swap(queue,j,k); %j9'HtjEa
k = j; noz&4"S.{
} 7U_~_yb
} G&FA~c
private void fixUp(int k) { _\M:h+^
while (k > 1) { OEc$ro=m*
int j = k >> 1; 48 DC
if (queue[j]>queue[k]) V6%J9+DK
break; Z3Le?cMt^
SortUtil.swap(queue,j,k); |1vikG8
k = j; _B4H"2}[Y
} {VOLUC o 4
} gGl}~
Zr`pOUk!4
} 8jyg1NN D
)LESdX
} r|[uR$|Y
(xnXM}M&2Y
SortUtil： e-vwve
L' w }
package org.rut.util.algorithm; ^VCgc>x;
&_cMbFLBP
import org.rut.util.algorithm.support.BubbleSort; Cf#[E~24
import org.rut.util.algorithm.support.HeapSort; (dl7+
import org.rut.util.algorithm.support.ImprovedMergeSort; Y>}[c
import org.rut.util.algorithm.support.ImprovedQuickSort; *,Bo $:(n
import org.rut.util.algorithm.support.InsertSort; zX+NhTTB
import org.rut.util.algorithm.support.MergeSort; [43:E*\$
import org.rut.util.algorithm.support.QuickSort; ^F@z+q
import org.rut.util.algorithm.support.SelectionSort; /DPD,bA
import org.rut.util.algorithm.support.ShellSort; +[$d9
Zi$v-b*<
/** $@y<.?k>UP
* @author treeroot RGrra<
* @since 2006-2-2 Z/nTI0N{
* @version 1.0 D;%(Z!
*/ Vo*38c2
public class SortUtil { ^^MVd@,i
public final static int INSERT = 1; g~EJja;
public final static int BUBBLE = 2; FSnF>3kj-
public final static int SELECTION = 3; WZkAlg7Z
public final static int SHELL = 4; lFMQT ;
public final static int QUICK = 5; @SA:64 9
public final static int IMPROVED_QUICK = 6; Hk)IV"[R
public final static int MERGE = 7; w#EP`aM2$=
public final static int IMPROVED_MERGE = 8; |y+<|fb,a
public final static int HEAP = 9; 'urn5[i
=?Y%w%2
public static void sort(int[] data) { CT1)tRN
sort(data, IMPROVED_QUICK); fhCMbq4T
} a`XXz
private static String[] name={ ^,`;x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W10=SM}
}; 24u;'i-y5
v[efM8
private static Sort[] impl=new Sort[]{ 0"q^`@sZ
new InsertSort(), )@"iWQ3K
new BubbleSort(), . e' vc
new SelectionSort(), $f`\TKlN
new ShellSort(), mx`C6G5
new QuickSort(), 4c"x&x|
new ImprovedQuickSort(), +r0ItqkM
new MergeSort(), Z]H`s{3
new ImprovedMergeSort(), ,'~8{,h5
new HeapSort() *$uj)*5,
}; +k=BD s
wBr$3:
public static String toString(int algorithm){ y_bb//IAG
return name[algorithm-1]; o#wDA0T
} 6ybpPls
SF?Ublc!
public static void sort(int[] data, int algorithm) { [UqJ3@>
impl[algorithm-1].sort(data); L`v7|!X
} /Yk4%ZJ{
US<bM@[
public static interface Sort { p BU,"Yy&
public void sort(int[] data); b(<#n6a}\
} q}vz]L&o
[~cb&6|M
public static void swap(int[] data, int i, int j) { 3N8RZt1.b
int temp = data; &_mOw.
data = data[j]; j*uc$hC"
data[j] = temp; `?Wy;5-
} !1+yb.{\
} KjK.Sv{N