[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; Dx3%KS
} JNBT^=x
int i1=l; 3gc"_C\$
int i2=mid+1; %ek"!A
for(int cur=l;cur<=r;cur++){ h<Wg3o
if(i1==mid+1) tpo>1|
data[cur]=temp[i2++]; F7T E|LZ
else if(i2>r) ]fE3s{y &-
data[cur]=temp[i1++]; p=B?/Sqa
else if(temp[i1] data[cur]=temp[i1++]; y(v_-6b
else ao$):,2*
data[cur]=temp[i2++]; G9Qe121m
} (6R4 \8z2
} d}-'<Z#G
xNX'~B^4d
} j"hASBTgp
;SY.WfVA7
改进后的归并排序: e+@xsn3
QNArZ6UQ
package org.rut.util.algorithm.support; :l"dYfl
v`B4(P1Z
import org.rut.util.algorithm.SortUtil; J3=BE2L
*1bzg/T<
/** "IwM:v
* @author treeroot )0-o%- e
* @since 2006-2-2 i&&qbZt
* @version 1.0 5UOk)rOf
*/ "8HE^Po/pn
public class ImprovedMergeSort implements SortUtil.Sort { s$GF 95^
ET-Vm >]
private static final int THRESHOLD = 10; tU:FX[&?R
fxtxu?A>
/* o56kp3b)b
* (non-Javadoc) Ae49n4J
* I4ilR$jg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YPszk5hn
*/ ezZph"&
public void sort(int[] data) { 0S.?E.-&0
int[] temp=new int[data.length]; "={L+di:M
mergeSort(data,temp,0,data.length-1); v!trsjb
} `?uPn~,e8
V]c5 Z$Bd
private void mergeSort(int[] data, int[] temp, int l, int r) { }V]eg,.BJ
int i, j, k; z-@-O
int mid = (l + r) / 2; bUs|t
if (l == r) t5)J;0/
return; TyOH`5D
if ((mid - l) >= THRESHOLD) #DUh(:E'`
mergeSort(data, temp, l, mid); _tj&Psp
else nwf7M#3d
insertSort(data, l, mid - l + 1); <&U!N'CE
if ((r - mid) > THRESHOLD) (WE,dY+.
mergeSort(data, temp, mid + 1, r); D9-Lg%
else (q~0XE/ a
insertSort(data, mid + 1, r - mid); ;'3]{BGcU
$Ha%Gr
for (i = l; i <= mid; i++) { |Q!4GeQL[
temp = data; p)/ p!d[T/
} N E= w6
for (j = 1; j <= r - mid; j++) { 0x5xLg;Q
temp[r - j + 1] = data[j + mid]; o.^y1mH'
} 2U9&l1P=
int a = temp[l]; XDYosC:
int b = temp[r]; a)9rs\Is{
for (i = l, j = r, k = l; k <= r; k++) { 16$y`~c-z
if (a < b) { &p"(-
data[k] = temp[i++]; 3hS6jS
a = temp; 9+Nw/eszO
} else { irMd jG
data[k] = temp[j--]; {oWsh)[x2
b = temp[j]; c_1/W{
} mP-2s;q
} Y {c5
} !Iq{ 5:
&1GUi{I
/** |(ocDmd
* @param data p4>,Fwy2
* @param l Qb`C)Nh:
* @param i -3hCiKq
*/ Q)^g3J
private void insertSort(int[] data, int start, int len) { ow.6!tl0=h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x~/+RF XF
} onl>54M^
} f0oek{
} Kx6y" {me|
} inF6M8 A1
n}J^6:1
堆排序： J_ J+cRwq
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package org.rut.util.algorithm.support; - DL"-%X.
HXks_ix )
import org.rut.util.algorithm.SortUtil; R]QpMj%o
[rdsv
/** ',mW`ZN
* @author treeroot S()Za@ [a$
* @since 2006-2-2 s[c^"@HT
* @version 1.0 )+Y&4Qu
*/ hI~SAd ,#A
public class HeapSort implements SortUtil.Sort{ !k<:k "7
]rW8y%yD
/* (non-Javadoc) TnE+[.Qu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /F~X,lm*~
*/ +R[4\ hC0Y
public void sort(int[] data) { J_xG}d
MaxHeap h=new MaxHeap(); T:!MBWYe|
h.init(data); 509Q0 [k
for(int i=0;i h.remove(); QnKC#
System.arraycopy(h.queue,1,data,0,data.length); _Bk U+=|J
} )saR0{e0N
Q$=*aUU%G
private static class MaxHeap{ 9?`RR/w
O9]\Q@M.
void init(int[] data){ LSkk;)'2K
this.queue=new int[data.length+1]; yFM>T\@
for(int i=0;i queue[++size]=data; i_U}{|j
fixUp(size); kh?. K#
} Eark)
} Vxh.<b6&'
L11L23:
private int size=0; N z~"vi(t
AcC8)xRpk4
private int[] queue; O&$0&dhc
Iql5T#K+
public int get() { 0kLEBoOh
return queue[1]; vA-PR&
} 3] 76fF\^[
{XnPx?V
public void remove() { 7BFN|S_l
SortUtil.swap(queue,1,size--); agsISu(
fixDown(1); *fhX*e8y
} _t-7$d"
file://fixdown f a5]a
private void fixDown(int k) { ;$!I&<)
int j; aWaw&u
while ((j = k << 1) <= size) { Rd! 2\|
if (j < size %26amp;%26amp; queue[j] j++; b5 Q NEi
if (queue[k]>queue[j]) file://不用交换 Tsz NlRxc
break; jA`a/vWu
SortUtil.swap(queue,j,k); W_<4WG
k = j; iBvOJs
} ty- r&
} _413\`%8?
private void fixUp(int k) { ?q Xs-
while (k > 1) { $D_HZ"ytu
int j = k >> 1; JR1*|u
if (queue[j]>queue[k]) H/jm f5
break; E`)Qs[?Gk
SortUtil.swap(queue,j,k); dlD}Ub
k = j; :p-Y7CSSu
} iJP{|-h
} 6k9LxC:M
UqtHxEI%R~
} /`+7_=-
*K)0UKBr
} 4e9E' "8%
8:{q8xZ=k
SortUtil： tWk{1IL
zM59UQU;
package org.rut.util.algorithm; .#!mDlY;
,- HIFbXx@
import org.rut.util.algorithm.support.BubbleSort; (I=6Nnt'
import org.rut.util.algorithm.support.HeapSort; `-O=>U5nH
import org.rut.util.algorithm.support.ImprovedMergeSort; 2R`u[
import org.rut.util.algorithm.support.ImprovedQuickSort; ?,% TU&Yn
import org.rut.util.algorithm.support.InsertSort; 0Q1/n2V
import org.rut.util.algorithm.support.MergeSort; (=JueF@J
import org.rut.util.algorithm.support.QuickSort; wj%wp[KA$
import org.rut.util.algorithm.support.SelectionSort; j=j+Nf$
import org.rut.util.algorithm.support.ShellSort; 9#@Zz4Ww
IVteF*8hU
/** !Zs,-=^D
* @author treeroot 295w.X(J
* @since 2006-2-2 rJ(OAKnY
* @version 1.0 7a<_BJXx
*/ xNgt[fLpS
public class SortUtil { c{>|o
public final static int INSERT = 1; A,c'g}:
public final static int BUBBLE = 2; Y:pRcO.4g
public final static int SELECTION = 3; :_H>SR:
public final static int SHELL = 4; re uYTH
public final static int QUICK = 5; ~zyQ('
public final static int IMPROVED_QUICK = 6; RWikJ
public final static int MERGE = 7; `d*b]2
public final static int IMPROVED_MERGE = 8; ,!>fmU`E4
public final static int HEAP = 9; 6V;:+"BkJ
]u=Ca#!'
public static void sort(int[] data) { j9xXKa5
sort(data, IMPROVED_QUICK); lzfDH=&
} AZwa4n}"
private static String[] name={ ZQ[~*)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Wc;+2Hl[@
}; Cef7+fa
$l"MXxx5I
private static Sort[] impl=new Sort[]{ h{/ve`F>@
new InsertSort(), x,1=D~L}
new BubbleSort(), A&l7d0Z^j5
new SelectionSort(), \n0gTwiO%
new ShellSort(), z!CD6W1n
new QuickSort(), -N z}DW>
new ImprovedQuickSort(), t w!.%_1^
new MergeSort(), :t>Q:mX(N
new ImprovedMergeSort(), }17bV, t
new HeapSort() m!Af LSlwm
}; #!d]PH746
b-nYxd
public static String toString(int algorithm){ (C\r&N
return name[algorithm-1]; <E}N=J'uJ
} ;+%Z@b%
T} 8CfG_j
public static void sort(int[] data, int algorithm) { ':sTd^V
impl[algorithm-1].sort(data); #=x+ [d+
} ;[~^(. f
mJ$Htyr
public static interface Sort { BWEv1' v
public void sort(int[] data); sVoR?peQ
} :;TYL[
(nz}J)T&
public static void swap(int[] data, int i, int j) { :c<*%*e
int temp = data; SG`)PW?
data = data[j]; #eLN1q&Z
data[j] = temp; OPiaG!3<
} ,s? dAy5
} Ff)@L-Y\K