[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; <S75($
} ikD1N
int i1=l; [BBEEI=|r
int i2=mid+1; T:]L/wCj
for(int cur=l;cur<=r;cur++){ BQH}6ueZ
if(i1==mid+1) F[ ajOb8
data[cur]=temp[i2++]; I pzJ#
else if(i2>r) b89a)k>^g
data[cur]=temp[i1++]; $j}OB6^I
else if(temp[i1] data[cur]=temp[i1++]; ?S$i?\Qh
else sZ,Y60s8a
data[cur]=temp[i2++]; Z/;Xl~
} XW{>-PBg:
} 0& >H^
SP*fv`
} v3d&*I
Y6i _!z[V[
改进后的归并排序: G7!W{;@I
m%;D
package org.rut.util.algorithm.support; gKLyL]kAGz
&8.NT~"Gg
import org.rut.util.algorithm.SortUtil; 05yZad*
)SryDRT
/** xv{O^Ie+S
* @author treeroot !-`Cp3gqHr
* @since 2006-2-2 *]hBGr#6
* @version 1.0 7>iU1zy
*/ g V5zSudW
public class ImprovedMergeSort implements SortUtil.Sort { E%oY7.~-
j~j jX
private static final int THRESHOLD = 10; -=s(l.?Hm5
e:H26SW
/* tCxF~L@
* (non-Javadoc) Z6\+
* m,C1J%{^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lif&@of
*/ F
public void sort(int[] data) { WE]e m >
int[] temp=new int[data.length]; BH]Ynu&o
mergeSort(data,temp,0,data.length-1); akw,P$i
} 3rLTF\
rc&%m
private void mergeSort(int[] data, int[] temp, int l, int r) { _@S`5;4x
int i, j, k; ;%tF58&
int mid = (l + r) / 2; ljl^ GFo
if (l == r) `.s({/|[
return; t!Sq A(-V
if ((mid - l) >= THRESHOLD) V%$/#sza
mergeSort(data, temp, l, mid); -*5Rnx|Y{
else .920{G?l5
insertSort(data, l, mid - l + 1); 8-<:i
if ((r - mid) > THRESHOLD) 0TpK#OlI|c
mergeSort(data, temp, mid + 1, r); qC F5~;7
else `u>4\sv
insertSort(data, mid + 1, r - mid); {*{Ox[Nh{
Eu"_MgD
for (i = l; i <= mid; i++) { gbVdOm
temp = data; L "sO+4w
} .bBdQpF-
for (j = 1; j <= r - mid; j++) { |rmg#;/D
temp[r - j + 1] = data[j + mid]; {(r6e
} L(&&26Y
int a = temp[l]; quY:pqG38q
int b = temp[r]; ca+5=+X7
for (i = l, j = r, k = l; k <= r; k++) { eX@L3BKp
if (a < b) { F:x [
data[k] = temp[i++]; n; {76Q
a = temp; ;a:[8Yi
} else { LL:_L<
data[k] = temp[j--]; %*BlWk!Q
b = temp[j]; 4apL4E"r
} vpmj||\-
} .\>v0Du
} MEB it
cnTaJ/o
/** vWAL^?HUP
* @param data I`NjqyTW
* @param l #g6.Glz3
* @param i U&O: _>~
*/ e7wSOs
private void insertSort(int[] data, int start, int len) { P.gb1$7<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]U"94S U:)
} 8OgLn?"P
} H;RwO@v
} N7e"@Ic
} Omd .9
]+X@ 7
堆排序： t.mVO]dsj
-GxaV #{
package org.rut.util.algorithm.support; B}^w_C2
Hh+ 2mkg
import org.rut.util.algorithm.SortUtil; eM8}X[
'-zD
/** F$)[kP,wtO
* @author treeroot 82l~G;.n3
* @since 2006-2-2 Bve.C
* @version 1.0 HTG%t/S
*/ ~3<> 3p
public class HeapSort implements SortUtil.Sort{ wmTb97o
B_.%i+ZZ
/* (non-Javadoc) #\=FO>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a\r\PBi
*/ &Xf}8^T<V
public void sort(int[] data) { 4<BjC[@~Z{
MaxHeap h=new MaxHeap(); E>K!Vrh-L
h.init(data); V:joFRH9
for(int i=0;i h.remove(); {;2PL^i
System.arraycopy(h.queue,1,data,0,data.length); 3W N@J6?
} AIZ]jq
.[_L=_.
private static class MaxHeap{ Hj}K{20
5 sX+~Q
void init(int[] data){ X(NLtO w
this.queue=new int[data.length+1]; 6Yln,rC
for(int i=0;i queue[++size]=data; ?`?)QE8
fixUp(size); nR*ryv
} m;,N)<~
} mHRiugb!
Z.Lc>7o
private int size=0; 7<*yS310
:=Nz}mUV
private int[] queue; ,y#Kv|R
o2F)%TDY
public int get() { NCDvobYJ
return queue[1]; {z{bY\
} y gz6C
A*\.NTM
public void remove() { z:wutqru
SortUtil.swap(queue,1,size--); :;9F>?VN>0
fixDown(1); x<ZJb
} -Fe?R*-g
file://fixdown #pnI\
private void fixDown(int k) { )P sY($ &
int j; NPp;78O0[
while ((j = k << 1) <= size) { lNYt`xp
if (j < size %26amp;%26amp; queue[j] j++; @u6B;)'l
if (queue[k]>queue[j]) file://不用交换 a!v1M2>
break; t7aefV&_,
SortUtil.swap(queue,j,k); HMNLa*CL'
k = j; 2fL;-\!y(
} H*PSR
} eceP0x
private void fixUp(int k) { fumm<:<CLO
while (k > 1) { 50S&m+4d+
int j = k >> 1; _z|65H
if (queue[j]>queue[k]) C&(N I
break; Tw-;7Ae
SortUtil.swap(queue,j,k); ``hf=`We
k = j; gtppv6<Mj4
} D9H?:pmv?
} asppRL||
"y}--
} W:pIPDx1=!
V@g'#={r
} )6Fok3u
uxr #QA
SortUtil： _9F9W{'
a.k.n<
package org.rut.util.algorithm; f*?]+rz
iP7(tnlW$
import org.rut.util.algorithm.support.BubbleSort; rX2.i7i,
import org.rut.util.algorithm.support.HeapSort; (@fHl=! Za
import org.rut.util.algorithm.support.ImprovedMergeSort; m;GCc8
import org.rut.util.algorithm.support.ImprovedQuickSort; )"7iJb<E
import org.rut.util.algorithm.support.InsertSort; AP 2_MV4W
import org.rut.util.algorithm.support.MergeSort; Pd_U7&w,5
import org.rut.util.algorithm.support.QuickSort; !Dn,^
import org.rut.util.algorithm.support.SelectionSort; -lY6|79bF
import org.rut.util.algorithm.support.ShellSort; 4O^xY 6m
8;JWK3Gv
/** '-Vt|O_Q
* @author treeroot .1Dg s=|
* @since 2006-2-2 )vE~'W
* @version 1.0 t.i 8 2Q
*/ ;DfY#-
public class SortUtil { _@ qjV~%Sy
public final static int INSERT = 1; ;U+3w~
public final static int BUBBLE = 2; pmyXLT
public final static int SELECTION = 3; 2K/4Rf0;
public final static int SHELL = 4; L [pBB
public final static int QUICK = 5; 4V)kx[j
public final static int IMPROVED_QUICK = 6; TNe l/
public final static int MERGE = 7; KJ)k =mJ
public final static int IMPROVED_MERGE = 8; ,is3&9
public final static int HEAP = 9; rZ}:Z'`
X^wt3<Kbf
public static void sort(int[] data) { 2} /aFR
sort(data, IMPROVED_QUICK); a%JuC2
} f<d`B]$(
private static String[] name={ s<<ooycBrQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ];[}:f
}; 3M[!N
ZbW17@b
private static Sort[] impl=new Sort[]{ Y!w`YYKP
new InsertSort(), ; F"g$_D0
new BubbleSort(), *&^Pj%DX
new SelectionSort(), B"1c
new ShellSort(), Bq%Jh
new QuickSort(), |4;Fd9q^m
new ImprovedQuickSort(), ,~N/- 5
new MergeSort(), IL#"~D?
new ImprovedMergeSort(), wDal5GJp
new HeapSort() l[0RgO*S
}; k8&;lgO'
HdUQCugxx:
public static String toString(int algorithm){ |"8b_Cq{
return name[algorithm-1]; X9W@&zQ
} XpB_N{v9w
5H<m$K4z
public static void sort(int[] data, int algorithm) { 6 $4[gcL'
impl[algorithm-1].sort(data); y}" O U
} l*Gvf_UH
M2,l7
public static interface Sort { -A^_{4X
public void sort(int[] data); %S960
} t&C1Oo}=3
_7Ju
public static void swap(int[] data, int i, int j) { ] vHF~|/-
int temp = data; > PRFWO
data = data[j]; JE"x
data[j] = temp; q$d>(vbq
} AUG#_HE]k
} c<:-T