[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; M H }4F
} eS9/-Y
int i1=l; HErTFY+vC
int i2=mid+1; 2bU3*m^M
for(int cur=l;cur<=r;cur++){ %^}3:0G
if(i1==mid+1) <N^2|*3
data[cur]=temp[i2++]; ipfiarT~)
else if(i2>r) \:C@L&3[
data[cur]=temp[i1++]; iF2/:iP
else if(temp[i1] data[cur]=temp[i1++]; y8jk9Tv
else Ro`Hm8o/
data[cur]=temp[i2++]; vsg"!y@v
} 4;8 Z?.
} C#X|U2$
=if5$jE3
} OL&ku &J_
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改进后的归并排序: TGu`r>N51
W@jBX{k
package org.rut.util.algorithm.support; zZDa71>
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import org.rut.util.algorithm.SortUtil; \M1-
aB~?Y+m
/** ;,n{6`
* @author treeroot H `Fe|6I&
* @since 2006-2-2 9r%O
* @version 1.0 Ak[}s|,)
*/ =rcqYPul0
public class ImprovedMergeSort implements SortUtil.Sort { O#fGHI<43[
X2!vC!4P?L
private static final int THRESHOLD = 10; 5F$ elW
\gy39xoW(
/* pA9^-:\*
* (non-Javadoc) io^^f|
* Ul7)CT2:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7a 4G:
*/ Kf D8S
public void sort(int[] data) { hkeOe
int[] temp=new int[data.length]; JX@/rXFY}
mergeSort(data,temp,0,data.length-1); TG'_1m*$
} ^B~z .F i
dM8`!~#&PI
private void mergeSort(int[] data, int[] temp, int l, int r) { a=\r~Z7E
int i, j, k; OF*m9
int mid = (l + r) / 2; 7HzO_u%H1
if (l == r) Qp~O!9ph
return; 5Og.:4
if ((mid - l) >= THRESHOLD) ,Hn{nVU1R=
mergeSort(data, temp, l, mid); OF'y]W&
else V~` ?J6
insertSort(data, l, mid - l + 1); XfmPq'#Z
if ((r - mid) > THRESHOLD) }-9
mergeSort(data, temp, mid + 1, r); BXyg ?
else Fu:VRul=5$
insertSort(data, mid + 1, r - mid); ju`x
x;2tmof=L
for (i = l; i <= mid; i++) { i/`N~r
temp = data; ntE;*FyH
} TyVn5XHl^
for (j = 1; j <= r - mid; j++) { pq$`T|6^
temp[r - j + 1] = data[j + mid]; vK z/-9im
} mnswGvY
int a = temp[l]; ,cD(s(6+
int b = temp[r]; > f,G3Ay
for (i = l, j = r, k = l; k <= r; k++) { =m6;]16D
if (a < b) { H'Q4IRT
data[k] = temp[i++]; 5%j !SVW
a = temp; `)$'1,]u
} else { G4][`C]8c
data[k] = temp[j--]; 5]DgfwX
b = temp[j]; #@Yw]@5M
} uH S)
} B B*]" gT
} wB~Ag$~
Z}6
/** !=M[u+-
* @param data :4|ubu
* @param l Lgl%fO/<t
* @param i S,,,D+4
*/ [=imF^=3Vb
private void insertSort(int[] data, int start, int len) { c.y8x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]wCg'EUB
} f]N2(eM
} l1XA9>n
} 3(l^{YC+[7
} d[(KgX9
zX{K\yp
堆排序： *T0{ yI
57*`y'CW
package org.rut.util.algorithm.support; O+hN?/>v
^Rriu $\
import org.rut.util.algorithm.SortUtil; H7!j5^
A7,TM&
/** R,?7|x
* @author treeroot U1!6%x
* @since 2006-2-2 s 8O"U%
* @version 1.0 ^F/gJ3_;
*/ 4sOo>.<x
public class HeapSort implements SortUtil.Sort{ <]#'6'
7jP C{W
/* (non-Javadoc) >sk vg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |c,,*^
*/ X,dOF=OJL
public void sort(int[] data) { iX,|;J|]
MaxHeap h=new MaxHeap(); v.Wkz9 w}
h.init(data); seO7/h_a
for(int i=0;i h.remove(); GqB]^snh
System.arraycopy(h.queue,1,data,0,data.length); V4kt&61
} AdV&w: ^yf
H<bYm]a%
private static class MaxHeap{ Kv3cKNvu~
@X\-c2=
void init(int[] data){ SJ4[n.tPI
this.queue=new int[data.length+1]; Q@zD'G>
for(int i=0;i queue[++size]=data; ha_&U@w
fixUp(size); _qwKFC
} X}Heaqn
} hJ[Z~PC\T0
!Wn^B|
private int size=0; G}ZJ}5h
;Gf,$dbWn
private int[] queue; 3Q'Q %2
v%8.o%G
public int get() { Bg.~#H
return queue[1]; &|cg`m
} VnqgN
k$j4~C'$
public void remove() { Kxs_R#k
SortUtil.swap(queue,1,size--); >6xZF'4
fixDown(1); >drG,v0qh
} CHxu%-g
file://fixdown ! *Snx
private void fixDown(int k) { vV5dW
int j; #w_cos[I
while ((j = k << 1) <= size) { 7mG/f
if (j < size %26amp;%26amp; queue[j] j++; 36ygI0V_
if (queue[k]>queue[j]) file://不用交换 Q7uhz5oZ
break; V}c3}'_U]
SortUtil.swap(queue,j,k); d~#>.$Uu
k = j; $J]VY;C!
} DbDi n
} \C<|yD
private void fixUp(int k) { T\Zf`.mt
while (k > 1) { |^: A,%>
int j = k >> 1; $,Q0ay
if (queue[j]>queue[k]) R'M=`33M
break; Y|%s =0M
SortUtil.swap(queue,j,k); 3.[ fTrzJ
k = j; J0xV\O !e
} )?es3Ehqq
} /Z':wu\
vRp#bScc
} xw[KP [(
1>5l(zK!9
} 1< 22,
IY$v%%2WZ
SortUtil： C%#%_ "N
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package org.rut.util.algorithm; `[.b>ztqgJ
%ae|4u#b
import org.rut.util.algorithm.support.BubbleSort; l;+nL[%`
import org.rut.util.algorithm.support.HeapSort; M1UabqQ
import org.rut.util.algorithm.support.ImprovedMergeSort; b8Bf,&:ys
import org.rut.util.algorithm.support.ImprovedQuickSort; QYl Pr&O9
import org.rut.util.algorithm.support.InsertSort; 2VB|a;Mo
import org.rut.util.algorithm.support.MergeSort; ^g^R[8
import org.rut.util.algorithm.support.QuickSort; "gaurr3
import org.rut.util.algorithm.support.SelectionSort; $hND!T+;
import org.rut.util.algorithm.support.ShellSort; 'IVNqfC)u
u`K)dH,
/** q.xt%`@aA
* @author treeroot ~8fy qE$
* @since 2006-2-2 ]yg3|C;
* @version 1.0 &A}@@d
*/ 2L\}
public class SortUtil { Nu}x`Qkmr
public final static int INSERT = 1; G3[X.%g`
public final static int BUBBLE = 2; v@_^h}h/,=
public final static int SELECTION = 3; |AgdD
public final static int SHELL = 4; j%_{tB
public final static int QUICK = 5; ?%)G%2
public final static int IMPROVED_QUICK = 6; ;^fGQ]`4
public final static int MERGE = 7; `;X~$uS
public final static int IMPROVED_MERGE = 8; _SVIY@K|/
public final static int HEAP = 9; O$ p
'aj97b;lpG
public static void sort(int[] data) { cOhx
sort(data, IMPROVED_QUICK); ,drbj.0-
} g4p-$WyT8>
private static String[] name={ }02#[vg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nw.,`M,N
}; I%4)%
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private static Sort[] impl=new Sort[]{ no~Yet+<"
new InsertSort(), 6A$ Y]u
new BubbleSort(), jFE1k(2e
new SelectionSort(), )uG7 DR
new ShellSort(), y~16o
new QuickSort(), ;_bZH%o.
new ImprovedQuickSort(), O{P@fv%~(o
new MergeSort(), `B1r+uTP~
new ImprovedMergeSort(), |"gg2p
new HeapSort() 1u9*)w
}; gfr y5e
7IEG%FY T
public static String toString(int algorithm){ A(j9T,!
return name[algorithm-1]; oR``Jiob|
} _lK+/"-l
,RA;X
public static void sort(int[] data, int algorithm) { jUtFDw
impl[algorithm-1].sort(data); VXfp=JE
} G6*P]<
-a^%9 U
public static interface Sort { pUp&eH
public void sort(int[] data); "W"2Y(
} #L3heb&9
F\K&$5J{p
public static void swap(int[] data, int i, int j) { t@_MWF
int temp = data; W##~gqZ/
data = data[j]; U3oMY{{EJ
data[j] = temp; )(4.7>
} E((U=P}+g
} goJK~d8M*