[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; {mL/)\
} f7X#cs)a
int i1=l; &tZ?%sr
int i2=mid+1; UA,&0.7
for(int cur=l;cur<=r;cur++){ ^Gv<Xl
if(i1==mid+1) I(Nsm3L
data[cur]=temp[i2++]; lGPC)Hu{`
else if(i2>r) S^)r,cC
data[cur]=temp[i1++]; $E|W|4N
else if(temp[i1] data[cur]=temp[i1++]; |dD!@K
else -/
data[cur]=temp[i2++]; 3HbHl?-UNU
} >^:g[6Sj
} q30WUO;
YH<F~F _
} ~N[hY1}X[
CpS'2@6
改进后的归并排序: -7ct+3"J
/_,~dt
package org.rut.util.algorithm.support; 6Epns s
NOx&`OU+
import org.rut.util.algorithm.SortUtil; /BT;Q)(&
g8XGZW!
/** C4Z~9fzT
* @author treeroot SX^fh.
* @since 2006-2-2 94APjqV6'
* @version 1.0 g) v"nNS
*/ n{BC m %
public class ImprovedMergeSort implements SortUtil.Sort { NG'VlT
ErESk"2t
private static final int THRESHOLD = 10; PR|Trnd&D
Z55,S=i
/* lha)'
* (non-Javadoc) Ef,@}S
* '0 (Bb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _$ixE~w-!
*/ *, *"G?
public void sort(int[] data) { FZ=6x}QZ
int[] temp=new int[data.length]; ~n[LL)v
mergeSort(data,temp,0,data.length-1); 7gVWu"
} A</[Q>8
Qb|w\xT^Y
private void mergeSort(int[] data, int[] temp, int l, int r) { $:u,6|QsS=
int i, j, k; YfMe69/0I
int mid = (l + r) / 2; hQL9 Zl~
if (l == r) EE}NA{b
return; }#'KME4
if ((mid - l) >= THRESHOLD) ,;+\!'lS
mergeSort(data, temp, l, mid); 7Wb.(` a<
else A^,(Vyd
insertSort(data, l, mid - l + 1); "fpj"lf-
if ((r - mid) > THRESHOLD) ]nX.zE|F
mergeSort(data, temp, mid + 1, r); dt`L}Yi
else =AD/5E,3
insertSort(data, mid + 1, r - mid); %4 SREq
v9inBBC q
for (i = l; i <= mid; i++) { _D,8`na>K
temp = data; tB_V%qH
} hsqUiB tc6
for (j = 1; j <= r - mid; j++) { uTl:u
temp[r - j + 1] = data[j + mid]; /kw4":{]
} yN>"r2
int a = temp[l]; ^OBaVb
int b = temp[r]; W77JXD93
for (i = l, j = r, k = l; k <= r; k++) { #eUfwd6.Y
if (a < b) { :ZL>JVk
data[k] = temp[i++]; Vj2GK"$v
a = temp; r`;C9#jZ
} else { Z$ftG7;P0
data[k] = temp[j--]; ^7"%eWT`
b = temp[j]; raqLXO!j
} 3$Is==>7
} I.8|kscM
} E*w 2yWR
/t>o -
/** v,D_^?]@
* @param data Tby+Pd;
* @param l ';ZJuJ.
* @param i WN?T*bz2
*/ a^=4'.ok
private void insertSort(int[] data, int start, int len) { l4/TJ%`MG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `|/|ej]$P
} >}4]51s
} b8]oI"&G
} Ro<!n>H
} .\d0lJSr
|iwTzlt*#
堆排序： tLvli>y@
D~?kvyJ
package org.rut.util.algorithm.support; %I.{umU
)K?GAj]Pq
import org.rut.util.algorithm.SortUtil; ! 4oIx`
Qy70/on9
/** VuPET
* @author treeroot M:I,j
* @since 2006-2-2 F}AbA pTv
* @version 1.0 Cfi2N V
*/ T^nX+;:|
public class HeapSort implements SortUtil.Sort{ aDOH3Ri0K!
I"!gzI`Sd
/* (non-Javadoc) GDcV1$NA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )_Oc=/c|f
*/ z5vryhX_Z
public void sort(int[] data) { EmUxM_T/2
MaxHeap h=new MaxHeap(); 7q^/.:wlf
h.init(data); Z~c7r n
for(int i=0;i h.remove(); ^=W&p%Y(!
System.arraycopy(h.queue,1,data,0,data.length); TdE_\gEo/R
} f.f4<_v'h
5o3_x ~e
private static class MaxHeap{ L|Ydd!m
sN g"JQ
void init(int[] data){ ZH}NlEn
this.queue=new int[data.length+1]; RdDcMZ
for(int i=0;i queue[++size]=data; -of= Lp
fixUp(size); ('lnQD.Hd
} 7 %|>7
} 19rUvgC{M
#_7c>gn
private int size=0; %nCUct@c
z<fEJN
private int[] queue; 2"MI8EK
8;'n.SC{
public int get() { UA9LI<Y
return queue[1]; K$]QzPXS
} zh.c_>jS
|{[i M
public void remove() { Ck:J
SortUtil.swap(queue,1,size--); < 5PeI
fixDown(1); )aC+qhh
} i3"sArP"|
file://fixdown "_K 6=
private void fixDown(int k) { /iN\)y#u1
int j; h|H;ZC(B
while ((j = k << 1) <= size) { 64vSJx>u
if (j < size %26amp;%26amp; queue[j] j++; -Fdi,\e
if (queue[k]>queue[j]) file://不用交换 C5M-MZaS
break; &\H5*A.HkA
SortUtil.swap(queue,j,k); ul%bo%&~
k = j; l xfdJNb
} #TWc` 8
} <S}qcjG
private void fixUp(int k) { kW~F*
while (k > 1) { ?c2TT Q
int j = k >> 1; B1M/5cr.
if (queue[j]>queue[k]) VM,ZEt3Vy
break; Za6oYM_z
SortUtil.swap(queue,j,k); Hj\~sR$L-
k = j; aOHCr>po,
} ul?BKV+3E
} qLP+@wbJ
asi1c y\
} X]fw9tZ
V~_nyjrJM
} S8=4C`>jf
m?j!0>
SortUtil： 9C$!tz>>+i
#{M -3
package org.rut.util.algorithm; 5a ~tp'
*o[%?$8T
import org.rut.util.algorithm.support.BubbleSort; duS #&w
import org.rut.util.algorithm.support.HeapSort; z~H Gc"~
import org.rut.util.algorithm.support.ImprovedMergeSort; injmP9ed
import org.rut.util.algorithm.support.ImprovedQuickSort; gJ&!w8v.
import org.rut.util.algorithm.support.InsertSort; H5s85"U#
import org.rut.util.algorithm.support.MergeSort; x/7G0K2\}
import org.rut.util.algorithm.support.QuickSort; 6.|~~/
import org.rut.util.algorithm.support.SelectionSort; LU{Z
import org.rut.util.algorithm.support.ShellSort; ]~^/w}(K
is(!_Iv
/** \uk#pL
* @author treeroot 9^^#I~-
* @since 2006-2-2 $<cZ<g5)
* @version 1.0 Fsf22
*/ ;*2e;m~)?
public class SortUtil { gQuw|u
public final static int INSERT = 1; kYB <FwwB
public final static int BUBBLE = 2; vb- .^l
public final static int SELECTION = 3; ?I'-C?(t@1
public final static int SHELL = 4; v-3zav
public final static int QUICK = 5; Hl;p>>n
public final static int IMPROVED_QUICK = 6; J,O@T)S@
public final static int MERGE = 7; j/<y
public final static int IMPROVED_MERGE = 8; J31M:<
public final static int HEAP = 9; 7LwS =yP
XijLS7Aw|
public static void sort(int[] data) { V]]qu:Mh8
sort(data, IMPROVED_QUICK); |T_Pz&-
} @vYmkF`
private static String[] name={ !C#RW=h9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~ ZL`E
}; @MB _gt)7?
_vdxxhJ=P3
private static Sort[] impl=new Sort[]{ ik*)j
new InsertSort(), 0Qp'}_
new BubbleSort(), Qcy`O m^2
new SelectionSort(), 38rZ`O*D
new ShellSort(), 5|CiwQg|,p
new QuickSort(), ZZU8B?)
new ImprovedQuickSort(), #( sNk,^Ax
new MergeSort(), X`n0b<
new ImprovedMergeSort(), b0b9#9x
new HeapSort() s[q4K
}; U"+ ry.3`
ig}e@]
public static String toString(int algorithm){ Qe$>Jv5
return name[algorithm-1]; !>< %\K
} r`&|)Hx
yim$y,=d
public static void sort(int[] data, int algorithm) { 50ew/fZj|
impl[algorithm-1].sort(data); SECQVA_y`
} 5TneuG[OD
1[BvHOI2
public static interface Sort { Ue#yDTjc
public void sort(int[] data); =Rx?6%
} J,G9m4Z7
{7Avba
public static void swap(int[] data, int i, int j) { P! Ed
int temp = data; RVnyl`s
data = data[j]; h+3Z.WKhwP
data[j] = temp; `4.sy +2
} Ig3(|{R
} g]<Z]R`