[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; T~lHm
} 2j^8{Agz
int i1=l; O8*yho
int i2=mid+1; nqYarHi
for(int cur=l;cur<=r;cur++){ 27JZwlzZ
if(i1==mid+1) W1}d6Sbg
data[cur]=temp[i2++]; 0d,&)
else if(i2>r) > W^"*B
data[cur]=temp[i1++]; 0#sf,ja>
else if(temp[i1] data[cur]=temp[i1++]; =,U~
else -C*UB
data[cur]=temp[i2++]; |3EKK:RE
} *kGk.a=
} FPAj}as
(ap,3$hS
} /a-OBU
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改进后的归并排序: ?&XpwJw:~
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package org.rut.util.algorithm.support; %c&<{D}r
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import org.rut.util.algorithm.SortUtil; PAjH*5IA
x1.yi-
/** L8$+%Gvo
* @author treeroot u85Uy yN
* @since 2006-2-2 u`Zj~t
* @version 1.0 lDtl6r/
*/ ,6T3:qkkvF
public class ImprovedMergeSort implements SortUtil.Sort { lT-LOu|
$s9YU"
private static final int THRESHOLD = 10; >KCnmi
zqGo7;;#
/* -* piC(
* (non-Javadoc) iy,jq5uw
* @O&;%IZMY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s#C~HK
*/ !L55S03
public void sort(int[] data) { wb (quu
int[] temp=new int[data.length]; ^U{SUWl
mergeSort(data,temp,0,data.length-1); \oV g(J&o
} Xp_G9I,+
>Byxb./*
private void mergeSort(int[] data, int[] temp, int l, int r) { UZ 6:vmcT
int i, j, k; ]=T-Cv=t
int mid = (l + r) / 2; ]c$)0O\O
if (l == r) q5ja \
return; ZE0D=
if ((mid - l) >= THRESHOLD) GMYfcZ/,K
mergeSort(data, temp, l, mid); -|3feYb'
else 2:Q2w3Xe
insertSort(data, l, mid - l + 1); .Fn7yTQ%
if ((r - mid) > THRESHOLD) 4lpkq
mergeSort(data, temp, mid + 1, r); 4ai|*8.
else md`"zV
insertSort(data, mid + 1, r - mid); :PF6xL&
3=xN)j#B
for (i = l; i <= mid; i++) { X) xeq
temp = data; :7jDgqn^|i
} }2~$"L,_
for (j = 1; j <= r - mid; j++) { l5esx#([*R
temp[r - j + 1] = data[j + mid]; qA5PIEvdq
} `78)|a*R.
int a = temp[l]; wDz}32wB
int b = temp[r]; ftwn<B
for (i = l, j = r, k = l; k <= r; k++) { ]B3\IT
if (a < b) { Bi$nYV)-l
data[k] = temp[i++]; h;?H4j
a = temp; Rx%SeM2
} else { v[I,N$:
data[k] = temp[j--]; s2ixiv=
b = temp[j]; TIre,s)_
} k@/s-^ry3
} j$jgEtPK9=
} oVYW'~OID
C)xM>M_CB
/** mx;1'!'fr
* @param data ~gJJ@j 0n
* @param l sxFkpf_h
* @param i nb,+!)+
*/ Qy_! +q
private void insertSort(int[] data, int start, int len) { $Y9Wzv3Ra
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %1^E;n
} JuTIP6 /G
} !au%D?w
} =!{ E!3>*D
} 99tKs
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堆排序： bIP%xl Vp
mO(A'p "b
package org.rut.util.algorithm.support; eUeOyC
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import org.rut.util.algorithm.SortUtil; .\:{6_
t],5{UF
/** cH>3|B*y
* @author treeroot w_h}c$;GK
* @since 2006-2-2 8^>qzaf 8
* @version 1.0 C^8n;i9
*/ {RPZq2Tpc
public class HeapSort implements SortUtil.Sort{ ZxvBo4>tH
Kp)H>~cL
/* (non-Javadoc) ^DH*\ee
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g r[M-U
*/ .&2Nm&y$K
public void sort(int[] data) { D,sb{N
MaxHeap h=new MaxHeap(); DL]\dD
h.init(data); ?@YABl
for(int i=0;i h.remove(); .Mb<.R3
System.arraycopy(h.queue,1,data,0,data.length); `<x((@#
} Tw0GG8(c
(N 0kTi]b
private static class MaxHeap{ Wi%e9r{hU
ZW)_dg9
void init(int[] data){ 8k|&&3_[?
this.queue=new int[data.length+1]; {Ne5*HFV
for(int i=0;i queue[++size]=data; aRE%(-5
fixUp(size); ]**h`9MF
} TcKt
} }K'gjs/N;
` 5lW
private int size=0; D8*tzu-
c[<>e#s+;
private int[] queue; wJMk%N~R:
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public int get() { _CImf1
return queue[1]; N3$%!\~O
} N.D7
Z;M th#
public void remove() { " .<>(bE
SortUtil.swap(queue,1,size--); `%ulorS
fixDown(1); f@7HVv&
} #_?m.~`g[
file://fixdown tQ7:4._
private void fixDown(int k) { )~2~q7
int j; 7GG:1:2+>
while ((j = k << 1) <= size) { >O$JS,
if (j < size %26amp;%26amp; queue[j] j++; y)*W!]:7^>
if (queue[k]>queue[j]) file://不用交换 u0{R;)
break; z`esst\aV
SortUtil.swap(queue,j,k); gUWW}*\ U
k = j; E -+t[W
} (\$=de>?
} b9RJ>K
private void fixUp(int k) { +Z=%4
while (k > 1) { "J"RH:$v
int j = k >> 1; H9%[! RF
if (queue[j]>queue[k]) cf+EQY
break; P1qQ)-J
SortUtil.swap(queue,j,k); aGbHDo
k = j; !))!!{
} HnsPXF'8g
} K=N8O8R$y
,Z$!:U
} Y5z5LG4
|A,<m#C
} %n@ ^$&,&;
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SortUtil： u8r<B4k
B]#^&89wG)
package org.rut.util.algorithm; des.TSZ
9!?Ywc>0#
import org.rut.util.algorithm.support.BubbleSort; 7xh91EU:4
import org.rut.util.algorithm.support.HeapSort; w:nLm,
import org.rut.util.algorithm.support.ImprovedMergeSort; O<()T6
import org.rut.util.algorithm.support.ImprovedQuickSort; \&\U&^?
import org.rut.util.algorithm.support.InsertSort; D5"Xjo*
import org.rut.util.algorithm.support.MergeSort; -^ R?O
import org.rut.util.algorithm.support.QuickSort; )K!!Zq3;|
import org.rut.util.algorithm.support.SelectionSort; A{%LL r:
import org.rut.util.algorithm.support.ShellSort; a&Z;$
K,5_{pj
/** ^I:f4RWo
* @author treeroot AwtiV-w
* @since 2006-2-2 `R m<1
* @version 1.0 j.kv!;Rj=
*/ p1!-|Sqq
public class SortUtil { e:+[}I)
public final static int INSERT = 1; g#lMT%
public final static int BUBBLE = 2; kca#ssN
public final static int SELECTION = 3; /*e6('9s
public final static int SHELL = 4; ~?zu5,vb
public final static int QUICK = 5; ~xt]g zp{
public final static int IMPROVED_QUICK = 6; "h7Np/ m3
public final static int MERGE = 7; ^H`4BWc
public final static int IMPROVED_MERGE = 8; 4L/nEZ!Nsu
public final static int HEAP = 9; pmc)$3u
ib%'{?Q.
public static void sort(int[] data) { k2/t~|5
sort(data, IMPROVED_QUICK); h{T{3
} }6"l`$=Ev
private static String[] name={ FBeo@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Nnq r{ub
}; V;d<S@$
U8OVn(qV
private static Sort[] impl=new Sort[]{ $CDRIn50
new InsertSort(), 3?Fe(!@
new BubbleSort(), -unQ4G
new SelectionSort(), %m##i
new ShellSort(), `_e5pW=:>
new QuickSort(), 2$b JMx>
new ImprovedQuickSort(), wGgeK,*_
new MergeSort(), a[jNT$8
new ImprovedMergeSort(), *nB-] w/
new HeapSort() {]]#q0|
}; x}~Z[bx
:Z.P0=
public static String toString(int algorithm){ zNM*xPgS
return name[algorithm-1]; L, 2;-b|
} H"c2kno9
M^{=&
public static void sort(int[] data, int algorithm) { S;j"@'gz9
impl[algorithm-1].sort(data); ;sAe#b
} V3<#_:;
8&SWQ
public static interface Sort { Q})&c.L
public void sort(int[] data); 7U:{=+oLR
} v >cPr(
L),r\#Y(v
public static void swap(int[] data, int i, int j) { {__NVv
int temp = data; N<XMSt
data = data[j]; X7txAp.
data[j] = temp; ^t?vv;@}
} LKgo(&mY
} <6&Z5mpm$w