[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; Q+'nw9:;T
} UV@0gdy[
int i1=l; #K4*6LI
int i2=mid+1; [Gtb+'8
for(int cur=l;cur<=r;cur++){ o_$&XNC_
if(i1==mid+1) ($8t%jVWJJ
data[cur]=temp[i2++]; {[W(a<%bXm
else if(i2>r) \f%.n]>
data[cur]=temp[i1++]; 8EI:(NE*J
else if(temp[i1] data[cur]=temp[i1++]; >g}G}=R~3
else 6pp$-uS
data[cur]=temp[i2++]; Qnt5HSSt
} pRrHuLj^
} Z9[+'ZWt
]C!?HQ{bsf
} z:}nBCmLV
z_&P?+"Df
改进后的归并排序: '!Wvqs
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package org.rut.util.algorithm.support; j_GBH8`
o\!qcoE2W
import org.rut.util.algorithm.SortUtil; #]Y*0Wzpfn
T$P-<s
/** /pykW_`/-
* @author treeroot y vI<4F
* @since 2006-2-2 "@yyXS r
* @version 1.0 "HK/u(z)
*/ J'Sm0
public class ImprovedMergeSort implements SortUtil.Sort { D(\$i.,b2
Bm/YgQi
private static final int THRESHOLD = 10; _ck[&Q
xaW{I7FfG
/* JN(-.8<
* (non-Javadoc) uMd. j$$
* BJy;-(JP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pj8azFZ
*/ g7n"
public void sort(int[] data) { VaR/o#
int[] temp=new int[data.length]; E!mmLVa9
mergeSort(data,temp,0,data.length-1); qZ+H5AG2
} v&;:^jJ8
Z a(|(M H
private void mergeSort(int[] data, int[] temp, int l, int r) { /tj$luls5
int i, j, k; z9 ($.
int mid = (l + r) / 2; _A'{la~k
if (l == r) {/ 2E*|W~I
return; tC)6
if ((mid - l) >= THRESHOLD) L0"~[zB]N
mergeSort(data, temp, l, mid); (CE7j<j
else MKg,!TELe
insertSort(data, l, mid - l + 1); 2*1ft>Uty
if ((r - mid) > THRESHOLD) 7x k|+!
mergeSort(data, temp, mid + 1, r); /+[63=fl
else 1@qgF
insertSort(data, mid + 1, r - mid); +B"0{>n}F
;rR/5d1!
for (i = l; i <= mid; i++) { %!|O.xxRR
temp = data; E^CiOTN
} z]@6fM[
for (j = 1; j <= r - mid; j++) { c$h9/H=~
temp[r - j + 1] = data[j + mid]; s\3q!A?S3
} &JhX+'U
int a = temp[l]; -t-tn22
int b = temp[r]; [*4fwk^
for (i = l, j = r, k = l; k <= r; k++) { =.Tv)/ea
if (a < b) { fZ{[]dn[
data[k] = temp[i++]; |FNCXlgZ
a = temp; `JURQ:l)3^
} else { Nneo{j
data[k] = temp[j--]; r{K;|'d%h
b = temp[j]; (f#b7O-Wn
} =RsXI&&vh
} L%h/OD
} >I'%!E;
i.y)mcB4
/** l=={pb
* @param data >)**khuP7
* @param l ELD!{bMT
* @param i JAjku6
*/ \ |!\V
private void insertSort(int[] data, int start, int len) { E>uVofhml
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'Jj=RAV`
} Q[u6|jRt
} >n*\bXf
} F- rQ3
} AkBMwV
P'$ `'J]j
堆排序： @g-Tk
MMQ;mw=^]
package org.rut.util.algorithm.support; v~)LO2y
n/Dp"4H%q
import org.rut.util.algorithm.SortUtil; %,q.),F
anN#5jt
/** '%;\YD9
* @author treeroot #x@eDnb_
* @since 2006-2-2 =Lp7{09u
* @version 1.0 27Emm c
*/ ccJM>9
public class HeapSort implements SortUtil.Sort{ [\e@_vY@OH
&^.57]
/* (non-Javadoc) z\!K<d"Xv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X[3}?,aqL
*/ 8Ogv9
public void sort(int[] data) { pdVQ*=c?M
MaxHeap h=new MaxHeap(); 3Ofc\
h.init(data); qUJ aeQ
for(int i=0;i h.remove(); p( LZ)7/
System.arraycopy(h.queue,1,data,0,data.length); aX6}6zubr
} KY9n2u&4
G4-z3e,crr
private static class MaxHeap{ ,xi({{L*
AC- )BM';
void init(int[] data){ \XzM^K3
this.queue=new int[data.length+1]; _^ |2}t
for(int i=0;i queue[++size]=data; [k%4eO2p"
fixUp(size); 4=<*Vd`p
} [.,>wo~
} LlYTv%I
W;_E4
private int size=0; kUl
6g:|*w
private int[] queue; WcUJhi^\C
!36]ud&
public int get() { !cX[-}Q
return queue[1]; YTaLjITG
} R^&q-M=O[
8Cx^0
public void remove() { KOSM]c\H
SortUtil.swap(queue,1,size--); YK#fa2ng
fixDown(1); Dl\`
} b1?xeG#
file://fixdown |V,<+BEi
private void fixDown(int k) { *f+: <=i
int j; /bRg?Q
while ((j = k << 1) <= size) { Xl-e !
if (j < size %26amp;%26amp; queue[j] j++; :l\V'=%9'@
if (queue[k]>queue[j]) file://不用交换 J$ut_N):N
break; *ZCn8m:-+
SortUtil.swap(queue,j,k); _2ef LjXQ
k = j; $.E6S<(h
} @mQ:7-,~
} P ,mN >
private void fixUp(int k) { Gu0 ,)jy\
while (k > 1) { # TkR
int j = k >> 1; 3R$Z[D-
if (queue[j]>queue[k]) 'Prxocxq
break; Ri*3ySyb
SortUtil.swap(queue,j,k); 2[yBD-":
k = j; 5]Ajf;W\
} }FqA ppr
} r?$?;%|C
w}cY6O,1
} dl]#
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} ki]ti={12
k ]a*&me
SortUtil： 9)dfL?x8V{
$%k1fa C
package org.rut.util.algorithm; $4=f+ "z
RVw9Y*]b
import org.rut.util.algorithm.support.BubbleSort; clO,}Ph>
import org.rut.util.algorithm.support.HeapSort; k+ o|0
import org.rut.util.algorithm.support.ImprovedMergeSort; 7A$B{
import org.rut.util.algorithm.support.ImprovedQuickSort; 2][DZl
import org.rut.util.algorithm.support.InsertSort; &"Ux6mF-"
import org.rut.util.algorithm.support.MergeSort; :;]Oc
import org.rut.util.algorithm.support.QuickSort; P\2M[Gu(Q
import org.rut.util.algorithm.support.SelectionSort; #;KsJb)N.
import org.rut.util.algorithm.support.ShellSort; $14:(<
vG41Ck1
/** u,.3
* @author treeroot _"a=8a06G
* @since 2006-2-2 pJIv+
* @version 1.0 3(E $I5
*/ "f.Z}AbP
public class SortUtil { ]3{0J
public final static int INSERT = 1; :3h{ A`u
public final static int BUBBLE = 2; uRV<?y%
public final static int SELECTION = 3; Av J4\
public final static int SHELL = 4; S56]?M|[
public final static int QUICK = 5; "\%On >
public final static int IMPROVED_QUICK = 6; %r{3wH#D@
public final static int MERGE = 7; 7*o*6,/
public final static int IMPROVED_MERGE = 8; jdA ]2]
public final static int HEAP = 9; v-j3bB
OW;tT=ql
public static void sort(int[] data) { $^/0<i$
sort(data, IMPROVED_QUICK); z9/G4^qF
} BHDML.r }M
private static String[] name={ 9=l.T/?sf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JAc_kl{4O
}; C)-^<
?i\;:<e4
private static Sort[] impl=new Sort[]{ U\@A_ B
new InsertSort(), ,~PYt*X4
new BubbleSort(), 4<,|*hAT
new SelectionSort(), $m$;v<PSe
new ShellSort(), vsB*rP=
new QuickSort(), ;i uQ?MR3
new ImprovedQuickSort(), . RVVWqW
new MergeSort(), Njc%_&r
new ImprovedMergeSort(), dhPKHrS
new HeapSort() XUMX*
}; w&h2y4
ed 59B)?l
public static String toString(int algorithm){ Q[n\R@
return name[algorithm-1]; 3Mjj'5KH!
} ~`8hwR1&z
yc;3Id5?>
public static void sort(int[] data, int algorithm) { xg`h40c
impl[algorithm-1].sort(data); '=E9En#@
} imB#Eo4eY
Nil}js27
public static interface Sort { d;[u8t
public void sort(int[] data); gwkb!#A
} |H}sYp
66&EBX}
public static void swap(int[] data, int i, int j) { >zvY\{WY
int temp = data; IV16d
data = data[j]; RSfM]w}Hq#
data[j] = temp; +ZsX*/TOn
} Ue:z1p;g
} D|bBu