[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'$]lf;*
} O $uXQ.r
int i1=l; ^$aj,*Aj~
int i2=mid+1; . gK*Jpmx
for(int cur=l;cur<=r;cur++){ s@C@q(i6
if(i1==mid+1) oc,a
data[cur]=temp[i2++]; IZczHHEL`b
else if(i2>r) )p7WU?&I
data[cur]=temp[i1++]; _dY6Ip%
else if(temp[i1] data[cur]=temp[i1++]; 4r!8_$fN?G
else ]3<k>?
data[cur]=temp[i2++]; _f%Wk>A4
} lH/d#MT
} ~/J:p5?L
Mg]q^T.a
} n83,MV?-
}E+}\&
改进后的归并排序: %N@454enH
8V%(SV
package org.rut.util.algorithm.support; p%_#"dkC7
s5>=!yX
import org.rut.util.algorithm.SortUtil; `d,hP"jBc
-"iGcVV
/** 5QU7!jbI
* @author treeroot +2=N#LM
* @since 2006-2-2 a!}.l< )
* @version 1.0 wn[q?|1
*/ k/W$)b:Of`
public class ImprovedMergeSort implements SortUtil.Sort { :\1:n
dI<s)!
private static final int THRESHOLD = 10; Mt)`hR+2
m98j`t
/* c6cGl]FL
* (non-Javadoc) @2-Eky
* CRvUD.D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GcQO&oq|
*/ r*<)QP^B~
public void sort(int[] data) { ]?tsYXU j
int[] temp=new int[data.length]; <l(6$~(-u
mergeSort(data,temp,0,data.length-1); RuDn1h#u{
} OwrzD~
MK7S*N1
private void mergeSort(int[] data, int[] temp, int l, int r) { >(Jy=m?
int i, j, k; wxpE5v+f|
int mid = (l + r) / 2; S`TP#uzKu]
if (l == r) ymSGB`CP
return; A.m#wY8
if ((mid - l) >= THRESHOLD) .4A4\-Cqe
mergeSort(data, temp, l, mid); .Ya]N+r*
else %B`MO-
insertSort(data, l, mid - l + 1); &GcWv+p
if ((r - mid) > THRESHOLD) TjGe8L:
mergeSort(data, temp, mid + 1, r); LX[J6YKR
else iy Zs:4jkc
insertSort(data, mid + 1, r - mid); vbzeabm
?J,hv'L]
for (i = l; i <= mid; i++) { .?9+1.`
temp = data; ?c0OrvM
} a02;Zl
for (j = 1; j <= r - mid; j++) { ?as)vYP
temp[r - j + 1] = data[j + mid]; KHKf+^uu
} x(h(a#,r
int a = temp[l]; D+d\<":
int b = temp[r]; +Ck F#H ~
for (i = l, j = r, k = l; k <= r; k++) { Qfr%BQV
if (a < b) { rxjMCMF
data[k] = temp[i++]; ^Afq)26D
a = temp; |&WeXVH E
} else { 7. 9n
data[k] = temp[j--]; !EuU @+
b = temp[j]; B\A2Vm`&
} JzMPLmgG/
} :\x53-&hO4
} ;LNFPo
Ath^UKO"
/** aPaGnP:^
* @param data 4A.ZMH
* @param l C,+6g/{
* @param i nJ |O,*`O
*/ T;X8T
private void insertSort(int[] data, int start, int len) { X64OX9:YF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]0.? 1se
} n!~mdI&
} S/v+7oT
} JyWBLi;Z
} r 11:T3
aN{C86wx
堆排序： y-O# +{7
1[o] u:m9U
package org.rut.util.algorithm.support; ?#ue:O1
+lmMBjDa
import org.rut.util.algorithm.SortUtil; u}hQF$a"
}2-<}m9}
/** P|YBCH
* @author treeroot z|[#6X6tT
* @since 2006-2-2 x&7%U
* @version 1.0 LS@[O])$'
*/ f~-81ctu
public class HeapSort implements SortUtil.Sort{ qN}kDT
K <7#;
/* (non-Javadoc) F;Ms6 "K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9qkH~B7
*/ V`?2g_4N
public void sort(int[] data) { WJCEiH
MaxHeap h=new MaxHeap(); p*)RP2
h.init(data); !/, 6+2Ru
for(int i=0;i h.remove(); +c#:;&Gs
System.arraycopy(h.queue,1,data,0,data.length); ik02Q,J
} =(b;Cow
betN-n-
private static class MaxHeap{ ) \Mwv&k1
K[Bq,nPo
void init(int[] data){ pZp|F
this.queue=new int[data.length+1]; qW[p .jN
for(int i=0;i queue[++size]=data; ]C^D5(t/cd
fixUp(size); q1a}o%
} #<|5<U
} I`w1IIY?m
!4d6wp"
private int size=0; J;4x-R$W
L+2!Sc,>
private int[] queue; ::Y
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public int get() { 9.ZhkvR4A
return queue[1]; HubSmbS1
} C-4NiXa
pisjfNT`o
public void remove() { JViglO1\
SortUtil.swap(queue,1,size--); t]LCe\#
fixDown(1); |j53'>N[
} -Qx:-,.a
file://fixdown 50% |9D0?Y
private void fixDown(int k) { !U.Xb6
int j; 6T{Zee
while ((j = k << 1) <= size) { Z#YkAQHv5
if (j < size %26amp;%26amp; queue[j] j++; ! )$ PD@
if (queue[k]>queue[j]) file://不用交换 V0+D{|thh6
break; |$@/ Z+
SortUtil.swap(queue,j,k); '0x`Oh&PK
k = j; &P{
} /l_$1<c
} 0.S].Y[
private void fixUp(int k) { |g]TWKc*
while (k > 1) { Q>f^*FyOw<
int j = k >> 1; !PUbaF-.6
if (queue[j]>queue[k]) ^p(t*%LM
break; e\i K
SortUtil.swap(queue,j,k); 5g ,u\`
k = j; {n}6
} +%(iGI{
} c7T9kV8hS
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} %J4]T35^2
f2Frb
} SvC|"-[mJ
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SortUtil： [tDUR
% INRds
package org.rut.util.algorithm; b<v\
) ?rJKr[`
import org.rut.util.algorithm.support.BubbleSort; Vr/UbgucJ
import org.rut.util.algorithm.support.HeapSort; r*]0PQ{?
import org.rut.util.algorithm.support.ImprovedMergeSort; X.<_TBos|
import org.rut.util.algorithm.support.ImprovedQuickSort; b2c% 0C
import org.rut.util.algorithm.support.InsertSort; Ry*NRP;
import org.rut.util.algorithm.support.MergeSort; -}|GkTM
import org.rut.util.algorithm.support.QuickSort; OD<0,r0f,
import org.rut.util.algorithm.support.SelectionSort; tdg.vYMDPC
import org.rut.util.algorithm.support.ShellSort; W Da;wt
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/** ZxkX\gl91
* @author treeroot ,t5X'sY L
* @since 2006-2-2 *9)7.}uY
* @version 1.0 'Y3>+7bI
*/ _.0c~\VA
public class SortUtil { aVvi_cau
public final static int INSERT = 1; p'1n'|$e
public final static int BUBBLE = 2; E 5}T_~-{
public final static int SELECTION = 3; @-~YQ@08`
public final static int SHELL = 4; en>d T
public final static int QUICK = 5; [^t"Hf
public final static int IMPROVED_QUICK = 6; *9e T#dH
public final static int MERGE = 7; AfW63;kH
public final static int IMPROVED_MERGE = 8; 8=ubMqr[
public final static int HEAP = 9; !J!zi
vco/h
public static void sort(int[] data) { I!lzOg4~
sort(data, IMPROVED_QUICK); SzkF-yRd
} s`Fv!
private static String[] name={ adtK$@Yeg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B'6^E#9
}; hk4f)z
?cdSZ'49[
private static Sort[] impl=new Sort[]{ ep<Ad
new InsertSort(), vai.",b=n6
new BubbleSort(), 7t`<`BY^
new SelectionSort(), RGYky3mQK
new ShellSort(), HRi~TZ?\
new QuickSort(), 0$l=ME(
new ImprovedQuickSort(), `*PVFm>
new MergeSort(), */xI#G,O+
new ImprovedMergeSort(), e3YZ-w^W~h
new HeapSort() VHVU*6_w
}; LA$uD?YA
1Lwi?~!LI
public static String toString(int algorithm){ C3-l(N1O{
return name[algorithm-1]; 0X+Jj/-ge
} AoyU1MR(
!e6;@*
public static void sort(int[] data, int algorithm) { 5:9Ay ?
impl[algorithm-1].sort(data); ^ cN-
} _m;cX!+~_
XG<J'3
public static interface Sort { ` _()R`=
public void sort(int[] data); q:#,b0|bv
} -_'M *-
pr>Qu:
public static void swap(int[] data, int i, int j) { [,Ts;Hy6Q
int temp = data; |s|>46E
data = data[j]; AC,$(E
data[j] = temp; w(`X P
} td4*+)'FY
} !JUXq