[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; o i~,}E_
} "DJ%Yo
int i1=l; r&L1jT.
int i2=mid+1; Vr&v:8:wb
for(int cur=l;cur<=r;cur++){ pcm1IwR`
if(i1==mid+1) tfe'].uT
data[cur]=temp[i2++]; Z@Qf0 c
else if(i2>r) 2"Y=*s
data[cur]=temp[i1++]; P|aSbsk:I<
else if(temp[i1] data[cur]=temp[i1++]; FOcDBCrOe
else Ew9MWlk
data[cur]=temp[i2++]; >v%UV:7ap
} Yt4v}{+
} )IE)a[wo
M49Hm[0(
} VC!g,LU|-
z]O>`50Q
改进后的归并排序: o`}8ZtD
2TaHWw<A
package org.rut.util.algorithm.support; zH@+\#M
[|HQfTp$
import org.rut.util.algorithm.SortUtil; gti=GmL(L
6(HJYa
/** L+)mZb&
* @author treeroot qv/chD`C
* @since 2006-2-2 x/92],.Mz
* @version 1.0 HsK52<
*/ #-d-zV*
public class ImprovedMergeSort implements SortUtil.Sort { } x'o`GuUf
c;R.rV<
private static final int THRESHOLD = 10; 8EI&}I
Zo,]Dx
/* a+\s0Qo<
* (non-Javadoc) l02aXxT)]
* P$G|o|h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mz6|#P}.s
*/ 9893{}\cB
public void sort(int[] data) { +T7FG_
int[] temp=new int[data.length]; K%vGfQ8Er-
mergeSort(data,temp,0,data.length-1); UAdj[m61
} a.AEF P4N
j!`2Z@
private void mergeSort(int[] data, int[] temp, int l, int r) { zU};|Zw
int i, j, k; =iPQ\_ON@
int mid = (l + r) / 2; u\UI6/
if (l == r) cuQ=bRIb
return; z.kBQ{P
if ((mid - l) >= THRESHOLD) 2wgdrO|B
mergeSort(data, temp, l, mid); {|@N~c+
else Wy$Q!R=i
insertSort(data, l, mid - l + 1); 7jF2m'(
if ((r - mid) > THRESHOLD) 2?owXcbx
mergeSort(data, temp, mid + 1, r); oga0h'
else ]^l-k@
insertSort(data, mid + 1, r - mid); Xc]Q_70O
Qp>Q-+e0
for (i = l; i <= mid; i++) { PFeK;`[
temp = data; O,KlZf_B
} =TXc- J
for (j = 1; j <= r - mid; j++) { ~9+\
temp[r - j + 1] = data[j + mid]; k+cHx799
} cGjkx3l*
int a = temp[l]; eD 7Rv<
int b = temp[r]; Z?'){\$*
for (i = l, j = r, k = l; k <= r; k++) { knZ<V%/e
if (a < b) { 1uhSP!b
data[k] = temp[i++]; i'vjvc~
a = temp; q]t^6m&-
} else { !GVxQll[f
data[k] = temp[j--]; ' 9
b = temp[j]; Yy0m &3[
} <8/lHQ^\)
} w+tO@
} rx;zd?
k$} 6Qd
/** WR"p2=
* @param data x68s$H
* @param l ~# |p=Y
* @param i /d-7n|#E
*/ *CXVA&?
private void insertSort(int[] data, int start, int len) { \(ZOt.3!J
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t\C[mw
} YY<e]CriU
} Q /\Hc
} b; 4;WtBO
} _qqJ>E<0
\7,'o] >M-
堆排序： v|mZcAz
c}FZb$q#
package org.rut.util.algorithm.support; Yt;.Z$i ,
tI(co5 W
import org.rut.util.algorithm.SortUtil; .{W)E
c^8y/wfok
/** n-_-;TYH
* @author treeroot ^KMZB
* @since 2006-2-2 U9B|u`72
* @version 1.0 %Gs!oD
*/ /=qn1
public class HeapSort implements SortUtil.Sort{ >j$CM:w
= 8%+$vX
/* (non-Javadoc) bx<7@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /P|jHK|{
*/ FeFH_
public void sort(int[] data) { #VEHyz6P
MaxHeap h=new MaxHeap(); I2'UC) 0
h.init(data); _sCpyu
for(int i=0;i h.remove(); 2xd G&}$fa
System.arraycopy(h.queue,1,data,0,data.length); P1ab2D
} ]Z\.Vx
R#Bdfmldq
private static class MaxHeap{ ;=6~,k)
u-. _;
void init(int[] data){ #`4ma:Pj
this.queue=new int[data.length+1]; jM3{A;U2
for(int i=0;i queue[++size]=data; <&rvv4*H
fixUp(size); bmO[9 )G
} RtR]9^:~
} )y:~T\g
VscEdtkd
private int size=0; uIvE~<
fz8eL:i:
private int[] queue; cf0Dq~G
HIi5kv]}|
public int get() { >2~q{e
return queue[1]; Ui7S8c#tH
} Ij}RlYQz
Vj"B#
public void remove() { PQ|kE`'
SortUtil.swap(queue,1,size--); }ya9 +?I
fixDown(1); pRj1b^F5y
} D[)g-_3f6<
file://fixdown Dw^d!%Ala
private void fixDown(int k) { ]|[oL6"
int j; ;Z"6ve4
while ((j = k << 1) <= size) { ]J C}il_b
if (j < size %26amp;%26amp; queue[j] j++; T0Q)}%L
if (queue[k]>queue[j]) file://不用交换 yA!#>u%g
break; |,Y(YSg.
SortUtil.swap(queue,j,k); A@EeX4N
k = j; a<M<) {$u
} ^60BQ{ne
} iFW)}_.
private void fixUp(int k) { Q': }'CI
while (k > 1) { Xb=9~7&,$
int j = k >> 1; R1FBH:Iu
if (queue[j]>queue[k]) _{6QvD3kg.
break; X/TuiKe
SortUtil.swap(queue,j,k); [(Pm\o
k = j; @twClk.s
} (yCFpb
} 8|w_PP1oE
iP;X8'< BC
} 0zaE?dA]
(<pc4#B@*
} =$IjN v(?
40oRO0p
SortUtil： -Vk+zEht
nqt;Ge M
package org.rut.util.algorithm; &V[m{.
q7C>A`w
import org.rut.util.algorithm.support.BubbleSort; [|\~-6"7N|
import org.rut.util.algorithm.support.HeapSort; \&J7>vu^y
import org.rut.util.algorithm.support.ImprovedMergeSort; K<KyX8$P0
import org.rut.util.algorithm.support.ImprovedQuickSort; .S17O}
import org.rut.util.algorithm.support.InsertSort; n97A'"'wz
import org.rut.util.algorithm.support.MergeSort; wz5xJ:Tj
import org.rut.util.algorithm.support.QuickSort; keEyE;O}u
import org.rut.util.algorithm.support.SelectionSort; [MYd15
import org.rut.util.algorithm.support.ShellSort; eW]K~SPd7
h\b]>q@
/** B]q &?~
* @author treeroot ~&=-*
* @since 2006-2-2 }N1Z7G
* @version 1.0 jx&pRjP
*/ ]C-hl}iq
public class SortUtil { ]%3o"|
public final static int INSERT = 1; g6k@E,cI_
public final static int BUBBLE = 2; YsXP$y]g-
public final static int SELECTION = 3; z{cIG8z
public final static int SHELL = 4; ]n0kO&
public final static int QUICK = 5; vW 0m%
public final static int IMPROVED_QUICK = 6; b,8W |
public final static int MERGE = 7; Pm6/sO
public final static int IMPROVED_MERGE = 8; lN)U8
public final static int HEAP = 9; cejSGsW6q
C XZm/^
public static void sort(int[] data) { n0kBLn
sort(data, IMPROVED_QUICK); -82Rz
} zo&'2I
private static String[] name={ [ottUS@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |<P]yn
}; `AeId/A4n
`(<XdlOj
private static Sort[] impl=new Sort[]{ ?ZDXT2b~~
new InsertSort(), pm,&kE
new BubbleSort(), ,L^eD>|j5
new SelectionSort(), b;O]@kBB
new ShellSort(), |r!G(an1x4
new QuickSort(), ad8kUHf
new ImprovedQuickSort(), ^$DpdzI
new MergeSort(), s"<k)Xi
new ImprovedMergeSort(), J_OIU#-B
new HeapSort() el39HB$
}; dy;Ue5
C".&m
public static String toString(int algorithm){ ZJ@M}-4O1
return name[algorithm-1]; p mcy(<
} J (Yfup
0ejx;Mum
public static void sort(int[] data, int algorithm) { n|Vs27
impl[algorithm-1].sort(data); a= ;7
} &96I4su
^wCjMi(sj
public static interface Sort { PmO utYV
public void sort(int[] data); f*7/O |Gp
} F_U3+J>
` ZXX[&C
public static void swap(int[] data, int i, int j) { (Kd;l&8
int temp = data; &F*s.gL
data = data[j]; B@` 87
data[j] = temp; abUvU26t
} }kdYR#{s
} V}=9S@$o