[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; fX:G;vYn
} QncjSaEE
int i1=l; S% ptG$Z
int i2=mid+1; Y,n8co^
for(int cur=l;cur<=r;cur++){ N+R{&v7=F%
if(i1==mid+1) lh0G/8+C
data[cur]=temp[i2++]; #I ,c'Vj
else if(i2>r) brE%/%!e
data[cur]=temp[i1++]; !`U #Pjp.
else if(temp[i1] data[cur]=temp[i1++]; KPK`C0mg@k
else ,iiI5FR
data[cur]=temp[i2++]; %RIu'JXi
} ctb , w
} pdQaVe7tRo
M(^IRI-
} qsN}KgTjg
1:h(8%H@"
改进后的归并排序: ,^iT,MgNNf
99zMdo S
package org.rut.util.algorithm.support; ('_S1?y
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import org.rut.util.algorithm.SortUtil; ;h~kB
|c]L]PU
/** UA0R)BH'
* @author treeroot y(Pv1=e
* @since 2006-2-2 z1e+Ob&
* @version 1.0 Mv%B#J
*/ A[88IMZs
public class ImprovedMergeSort implements SortUtil.Sort { GO#eI]>/r
g[{rX4~|
private static final int THRESHOLD = 10; ,;= S\
iQh:y:Jo1&
/* p{V(! v|
* (non-Javadoc) sYTToanA$?
* R'1"`@fG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^> d"D
*/ ]_y;Igaj
public void sort(int[] data) { Q|Pm8{8
int[] temp=new int[data.length]; wzI*QXV2s
mergeSort(data,temp,0,data.length-1); /X\:3P
} e+MsFXnB8
'(:R-u!pp
private void mergeSort(int[] data, int[] temp, int l, int r) { j;rxr1+w
int i, j, k; z\IZ5'
int mid = (l + r) / 2; ,+_gx.H2j
if (l == r) >&qaT*_g
return; 3A b_Z
if ((mid - l) >= THRESHOLD) :rmi8!o
mergeSort(data, temp, l, mid); 0pe*DbYP5
else 3t]0
insertSort(data, l, mid - l + 1); SMm$4h R
if ((r - mid) > THRESHOLD) 3V/|"R2s
mergeSort(data, temp, mid + 1, r); y*sqnzgF
else OdJ=4 x>
insertSort(data, mid + 1, r - mid); DVbY
,Hc,]TPC4
for (i = l; i <= mid; i++) { ?7*J4.
temp = data; -uK@2}NZ
} ubi6=
for (j = 1; j <= r - mid; j++) { CYk"
temp[r - j + 1] = data[j + mid]; ?rwHkPJ{*
} H!g9~a
int a = temp[l]; 4kLTKm:G
int b = temp[r]; %t-}dC&
for (i = l, j = r, k = l; k <= r; k++) { ]O M?e
if (a < b) { 8g 2'[ci$q
data[k] = temp[i++]; E+aE5wmr
a = temp; Luh*+l-nO
} else { y=WCR*N
data[k] = temp[j--]; p["20?^
b = temp[j]; B\7 80p<
} t4,(W`
} FE?^}VH
} k$K>ml/h
O$&4{h`
/** k{C|{m
* @param data )0@&pEObm
* @param l w3oe.hWP3N
* @param i 9O#?r82
*/ R 9Yk9v
private void insertSort(int[] data, int start, int len) { jowR!rqf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); & MfnH
} P0szY"}
} ;ZLfb n3\
} Js8d{\0\
} T;JA.=I
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堆排序： 4}=Z+tDu>
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package org.rut.util.algorithm.support; h`p9H2}0
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import org.rut.util.algorithm.SortUtil; h]okY49hY
*}`D2_uP
/** TYr"yZ([
* @author treeroot fyt`$y_E[
* @since 2006-2-2 V\><6v
* @version 1.0 EPwM+#|e-
*/ B6a
public class HeapSort implements SortUtil.Sort{ ~Aq$GH4
%L;'C v
/* (non-Javadoc) +LAjh)m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lilF _y
*/ XB-l[4?
public void sort(int[] data) { _:,U$W
MaxHeap h=new MaxHeap(); H;eOrX{GT
h.init(data); f0lK,U@P
for(int i=0;i h.remove(); ns[Q %_
System.arraycopy(h.queue,1,data,0,data.length); W_N!f=HW
} 4wQ>HrS)(
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private static class MaxHeap{ p=U5qM.O
:Qra9; Y
void init(int[] data){ `]:&h'
this.queue=new int[data.length+1]; vErlh:~e
for(int i=0;i queue[++size]=data; #EdsB
fixUp(size); wNm~H
} T8rf+B/.L
} g{06d~Y
cH%#qE3
private int size=0; b:}+l;e52
\a\ApD
private int[] queue; JmK[7t
BPzlt
public int get() { -%x9^oQwY
return queue[1]; |CFTOe\q
} (*2kM|
UN*XLHio
public void remove() { #r_&Q`!eU
SortUtil.swap(queue,1,size--); #<|q4a{8
fixDown(1); D#,P-0+%
} HJu;4O($
file://fixdown wmr8[n&c
private void fixDown(int k) { ^yB>0/{)z
int j; U$(AZ|0
while ((j = k << 1) <= size) { (GdL(H#IL
if (j < size %26amp;%26amp; queue[j] j++; e7.!=R{6
if (queue[k]>queue[j]) file://不用交换 ;MR(Eaep
break; ~?)ST?&
SortUtil.swap(queue,j,k); mT2Fn8yC1
k = j; PjkJsH
} c}>p"
} "~lGSWcU
private void fixUp(int k) { p$cSES>r:
while (k > 1) { qrmJJSJ
int j = k >> 1; b 64~Y|8
if (queue[j]>queue[k]) -Fj:^q:@u
break; =,=tSp
SortUtil.swap(queue,j,k); y$e'-v
k = j; a~F`{(Q2
} t~0}Emgp<(
} jreY'y:
e/<Og\}P/
} ~^Y(f'{
U\A*${
} -IB~lw
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SortUtil： b}[W[J}`
vK?{Z^J][
package org.rut.util.algorithm; 'J`%[,@V
`_;VD?")*l
import org.rut.util.algorithm.support.BubbleSort; *?`:=
import org.rut.util.algorithm.support.HeapSort; G*|2qX"o
import org.rut.util.algorithm.support.ImprovedMergeSort; ?N|B,F
import org.rut.util.algorithm.support.ImprovedQuickSort; i}5 #n
import org.rut.util.algorithm.support.InsertSort; m{bw(+r
import org.rut.util.algorithm.support.MergeSort; >#RXYDd
import org.rut.util.algorithm.support.QuickSort; g[P8
import org.rut.util.algorithm.support.SelectionSort; (Js'(tBhiU
import org.rut.util.algorithm.support.ShellSort; h.6yI
WlnI`!)d
/** *zy0,{bl
* @author treeroot dB`YvKr#
* @since 2006-2-2 P==rY5+s`
* @version 1.0 gn? ~y`
*/ UEJX0=
public class SortUtil { }>w;(R
public final static int INSERT = 1; 'lU9*e9
public final static int BUBBLE = 2; @,-xaZ[
public final static int SELECTION = 3; j_?U6$xi
public final static int SHELL = 4; uL!{xuN
public final static int QUICK = 5; hNV"{V3`{
public final static int IMPROVED_QUICK = 6; .jhuC#x{/
public final static int MERGE = 7; Xa2QtJq
public final static int IMPROVED_MERGE = 8; (l.`g@(L
public final static int HEAP = 9; 5s>$
zX!zG<<K
public static void sort(int[] data) { A}b<Lg
sort(data, IMPROVED_QUICK); X}yEMe{T
} XY5I5H_U
private static String[] name={ J0}OmNTzD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j`\}xDg
}; 1@H3!V4
1e;^MzB"
private static Sort[] impl=new Sort[]{ -,~n|ceI
new InsertSort(), (d[)U<
new BubbleSort(), ^z$-NSlI
new SelectionSort(), MS6^= ["
new ShellSort(), {O6f1LuH
new QuickSort(), oUm"qt_
new ImprovedQuickSort(), WZ'3
new MergeSort(), $+sNjwv^F
new ImprovedMergeSort(), N"b>]Ab] ;
new HeapSort() `?Wak=]g
}; NwmO[pt+
gUCv#:
public static String toString(int algorithm){ ,c6ID|\
return name[algorithm-1]; <BQ4x.[
} 6ZVJ2xs[%
!9i,V{$c`"
public static void sort(int[] data, int algorithm) { :<s)QD
impl[algorithm-1].sort(data); -O_5OT4
} ">kfX1LT
[t /hjm"$
public static interface Sort { lhx6+w
public void sort(int[] data); +"a .,-f!
} ~)}npS;
D:llGdU#2
public static void swap(int[] data, int i, int j) { j]6j!.1
int temp = data; ocy fU=}X
data = data[j]; X LPO_tD
data[j] = temp; "!gd)^<e
} L&lNpMT
} `I<*R0Qe