[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; EL^j}P
} B".3NQ
int i1=l; 9 K~X+N\
int i2=mid+1; &ev#C%Nu
for(int cur=l;cur<=r;cur++){ cof+iI~9O%
if(i1==mid+1) fJK;[*&Y
data[cur]=temp[i2++]; ;;}}uW=
else if(i2>r) #B6$r/%
data[cur]=temp[i1++]; 8'-E>+L
else if(temp[i1] data[cur]=temp[i1++]; ql I1<Jx
else pqDlg
data[cur]=temp[i2++]; rKkFflOVO
} :/\KVz'fw}
} DCSmEy`.
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} q"-+`;^7(-
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改进后的归并排序: k[a5D/b
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package org.rut.util.algorithm.support; b>@fHmpwD
#:E^($v
import org.rut.util.algorithm.SortUtil; x }.&?m
Ch'e'EmI
/** Zfc{}ius
* @author treeroot T?KM}<$(O
* @since 2006-2-2 },%,v2}
* @version 1.0 V(=3K"j
*/ $VJE&b
public class ImprovedMergeSort implements SortUtil.Sort { "\O{!Hj8
J?/NJ-F
private static final int THRESHOLD = 10; 6g)X&pZ
j)mi~i*U
/* ?OBB)hj
* (non-Javadoc) rI'kZ0&
* ,veo/k<"r8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1[]V @P^
*/ $AF,4Ir-b+
public void sort(int[] data) { iUq{c+h
int[] temp=new int[data.length]; `{&l _
mergeSort(data,temp,0,data.length-1); I#-T/1N
} B*^8kc:)L
A",Xn/d
private void mergeSort(int[] data, int[] temp, int l, int r) { JpZ3T~Wrf
int i, j, k; 0IxHB|^$
int mid = (l + r) / 2; 98Im/v
if (l == r) SD.c9
return; $%zM Z
if ((mid - l) >= THRESHOLD) &`}ACTY'P
mergeSort(data, temp, l, mid); X<uH [
else ^)1!TewCY
insertSort(data, l, mid - l + 1); h{CMPJjD
if ((r - mid) > THRESHOLD) 8nTdZu
mergeSort(data, temp, mid + 1, r); bJB*w
else *lyRy/POB
insertSort(data, mid + 1, r - mid); y<^hM6S?Z
i)[~]D.EH8
for (i = l; i <= mid; i++) { S~\u]j^%y
temp = data; QuBaG<
} zvKypx
for (j = 1; j <= r - mid; j++) { z<u@::
temp[r - j + 1] = data[j + mid]; v;:. k,E0
} V/t-
int a = temp[l]; *?!A
int b = temp[r]; 6D29s]h2
for (i = l, j = r, k = l; k <= r; k++) { puK /;nns
if (a < b) { Ql9 )
data[k] = temp[i++]; cpQhg-LY|
a = temp; 18JAca8Zs
} else { #4{9l SbU
data[k] = temp[j--]; +.|8W!h`1
b = temp[j]; lt|UehJF
} ePY69!pO5e
} ol@LLT_m
} dUP8[y
q&V=A[<rz
/** d~w}{LR[1
* @param data /;9]LC.g
* @param l 0[!38
* @param i ZZU"Q7`^
*/ ' 4Kf
private void insertSort(int[] data, int start, int len) { W_ubgCB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $-lP"m@}
} K ZQ `
} ?OdJt
} "kkZK=}Nv
} qW t 9Tr
0 hS(9y40
堆排序： Jc,{n*
so }Kb3n
package org.rut.util.algorithm.support; QW6\~l 4
S@eI3PkE
import org.rut.util.algorithm.SortUtil; z=a{;1A
2w67>w\
/** 84YZT+TEN
* @author treeroot $jNp-5+Q;
* @since 2006-2-2 n##d!d|g
* @version 1.0 |d=MX>i|G
*/ APY*SeIV
public class HeapSort implements SortUtil.Sort{ ~ H $q
Uv(Uj3D
/* (non-Javadoc) ^6Y:9+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S`&YY89{&
*/ 4&^BcWqA*f
public void sort(int[] data) { l;'c6o0e
MaxHeap h=new MaxHeap(); c!=^C/5Ee
h.init(data); &HYs^|ydrr
for(int i=0;i h.remove(); L }&$5KiwV
System.arraycopy(h.queue,1,data,0,data.length); VD-2{em
} /]"2;e-s+
y w>T1
private static class MaxHeap{ "ju0S&
R{A$hnhW6
void init(int[] data){ %SD=3UK6
this.queue=new int[data.length+1]; l/@t>%
for(int i=0;i queue[++size]=data; U#1,]a\
fixUp(size); 06~HVv
} 4O'X+dv^I
} Dl95Vo=1
\D,c*I|p7
private int size=0; H| 1O>p&
#F!'B|n
private int[] queue; tO]` I-
Irnfr\l.
public int get() { i-_ * 5%A
return queue[1]; ,1&</R_
} d}RR!i`<N
4]3(Vyh`
public void remove() { 0s8w)%4$
SortUtil.swap(queue,1,size--); J,j!
fixDown(1); l-RwCw4f
} "1Oe bo2
file://fixdown #OVf2 "
private void fixDown(int k) { 3erGTa[|q
int j; 5cE?>
while ((j = k << 1) <= size) { 5rx;?yvn
if (j < size %26amp;%26amp; queue[j] j++; #Jqa_$\.
if (queue[k]>queue[j]) file://不用交换 ]:vo"{*C
break; 'vUx4s
SortUtil.swap(queue,j,k); {expx<+4F
k = j; QSq0{
} v\:P_J
} m'P,:S)=
private void fixUp(int k) { { |[n>k
while (k > 1) { aZ{]t:]
int j = k >> 1; #0;ULZ99aH
if (queue[j]>queue[k]) yxz"9PE/P
break; f]Q`8nU
SortUtil.swap(queue,j,k); PhOtSml0
k = j; y,QJy=?
} :gJ?3LwTf
} I@<\DltPi
Z&E!m
} .#[==
bI"_hvcFp
} \tx4bV#
3/q)%Z^=
SortUtil： QBI;aG<+b>
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package org.rut.util.algorithm; >=Pn\"j
:v>Nz7SB
import org.rut.util.algorithm.support.BubbleSort; t}]R0O.s
import org.rut.util.algorithm.support.HeapSort; qoXncdDHZ
import org.rut.util.algorithm.support.ImprovedMergeSort; ^yo~C3r~
import org.rut.util.algorithm.support.ImprovedQuickSort; >MeM
import org.rut.util.algorithm.support.InsertSort; n6Qsug$z
import org.rut.util.algorithm.support.MergeSort; #[C=LGi
import org.rut.util.algorithm.support.QuickSort; _rU%DL?
import org.rut.util.algorithm.support.SelectionSort; 1SGLA"r
import org.rut.util.algorithm.support.ShellSort; x<es1A'u6
F+3}Gkn
/** Lradyo44u\
* @author treeroot .sOEqwO}>
* @since 2006-2-2 ?]]d s]
* @version 1.0 2)zAX"#/
*/ C>:'@o Z
public class SortUtil { b,Vg3BS
public final static int INSERT = 1; 3</gK$f2
public final static int BUBBLE = 2; H${5pY_M
public final static int SELECTION = 3; Ghb Jty`
public final static int SHELL = 4; J>XMaI})U
public final static int QUICK = 5; O<o>/HH$
public final static int IMPROVED_QUICK = 6; %2jRJ
public final static int MERGE = 7; *lT:P-
public final static int IMPROVED_MERGE = 8; }; ;Thfd
public final static int HEAP = 9; A3|hFk
:_f5(N*{5o
public static void sort(int[] data) { Y3QrD&V
sort(data, IMPROVED_QUICK); 2aR<xcSg
} (6Tvu5*4U
private static String[] name={ 6SGV}dAx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5v`[c+@F
}; (:P-ef$]C
Gjh8>(
private static Sort[] impl=new Sort[]{ n+XLZf#
new InsertSort(), _vV3A3|Ec,
new BubbleSort(), v{[:7]b_=
new SelectionSort(), t) :'XGk@
new ShellSort(), Sb& $xWL
new QuickSort(), y9xvGr[l
new ImprovedQuickSort(), W#.+C6/
new MergeSort(), 4,]z
new ImprovedMergeSort(), {%b*4x0?
new HeapSort() R#^.8g)t
}; [PW\l+i
%A^V@0K3
public static String toString(int algorithm){ 15X.gx
return name[algorithm-1]; 7B)m/%>3s
} 1z5Oi u
;#Y'SK
public static void sort(int[] data, int algorithm) { ?;0w1
impl[algorithm-1].sort(data); 7a_tT;f;
} D,l&^diz
QK`5KB(k'
public static interface Sort { nR(v~_y[V
public void sort(int[] data); EIrAq!CA
} Bgvv6(i
L HW\A8
public static void swap(int[] data, int i, int j) { Qu;cl/&
int temp = data; 'OTQiI^t=
data = data[j]; ;[-TsX:
data[j] = temp; HPz3"3n!
} :yi?<
} Id}/(Pkq