[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; &'i>d&
} sa/9r9hc+
int i1=l; 'rFLG+W
int i2=mid+1; [+CFQf>
for(int cur=l;cur<=r;cur++){ ]\>MDH
if(i1==mid+1) lx0BKD?n
data[cur]=temp[i2++]; 23K#9!3
else if(i2>r) UHTxNK@}
data[cur]=temp[i1++]; ]5:[6;wS
else if(temp[i1] data[cur]=temp[i1++]; IG;= |
else Oml3=TV
data[cur]=temp[i2++]; {M=B5-
} B-L@ 0gH
} Q>;Aq!mr=
oRcP4k;d=
} %}-ogi/c
V4CA*FEA
改进后的归并排序: r4gLoHD)
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package org.rut.util.algorithm.support; `('Up?
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import org.rut.util.algorithm.SortUtil; \>EUa}%xn
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/** v;g,qO!LJ
* @author treeroot 8'fF{C
* @since 2006-2-2 RtxAIMzh?
* @version 1.0 ]SL+ZT
*/ QkTU@T6>o
public class ImprovedMergeSort implements SortUtil.Sort { j5[>HL
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private static final int THRESHOLD = 10; p14$XV
k%-UW%
/* H15!QxD#
* (non-Javadoc) &`>dY /Y
* p<Tg}fg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #a9R3-aP
*/ \>w 2D
public void sort(int[] data) { <; Td8O89_
int[] temp=new int[data.length]; ?;(!(<{
mergeSort(data,temp,0,data.length-1); 1GLb^:~A
} kDE:KV<"c
EL2z&
private void mergeSort(int[] data, int[] temp, int l, int r) { 2JeEmG9
int i, j, k; [!} uj`e
int mid = (l + r) / 2; B%))HLo'
if (l == r) yTe25l{QaF
return; fHI@' '0
if ((mid - l) >= THRESHOLD) =M4wP3V/
mergeSort(data, temp, l, mid); [5M!'
else VzcW9'"#
insertSort(data, l, mid - l + 1); /z)8k4
if ((r - mid) > THRESHOLD) ,g|ht%"
mergeSort(data, temp, mid + 1, r); eUgKwu;
else %\B?X;(
insertSort(data, mid + 1, r - mid); 6/(Z*L"~6k
<3=k
for (i = l; i <= mid; i++) { )^)|b5,
temp = data; ;D4 bxz0ou
} ~aL?{kb+
for (j = 1; j <= r - mid; j++) { Hb^ovc0
temp[r - j + 1] = data[j + mid]; {cw+kY]m4-
} eR3MU]zF
int a = temp[l]; +K;%sAZy
int b = temp[r]; RzLeR%O
for (i = l, j = r, k = l; k <= r; k++) { Z%r8oj\n
if (a < b) { : 9zEne4
data[k] = temp[i++]; k9\n='OI
a = temp; f|yq~3x)
} else { 1'k,P;s
data[k] = temp[j--]; /wHfc[b>
b = temp[j]; S|IDFDn
} =_2(S6~
} N$Tzxs
} (Fk&~/SP
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/** _.,"`U; H
* @param data ~%: TE}
* @param l +]VW[$W
* @param i :?#wWF.
*/ 0J= $ A
private void insertSort(int[] data, int start, int len) { G#'G9/Tm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *vzj(HGO
} k.H4Mf(4
} C\cZ
} zfGr1;
} ]}_Ohe]X
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堆排序： u)P)r,
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package org.rut.util.algorithm.support; %9t=Iu*
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import org.rut.util.algorithm.SortUtil; <<1_rRL]
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/** f{D~ZC.*
* @author treeroot kAoh#8=
* @since 2006-2-2 *AYjMCo
* @version 1.0 :Ui'x8yt
*/ H<`7){iG
public class HeapSort implements SortUtil.Sort{ M;@/697G
o1<Z;2#
/* (non-Javadoc) Xkp`1UTH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \Q,5Ne'o
*/ *eUxarI
public void sort(int[] data) { &+pp;1ls
MaxHeap h=new MaxHeap(); ? ~_h3bHH
h.init(data); Vvl8P|x.<
for(int i=0;i h.remove(); byj7c(
System.arraycopy(h.queue,1,data,0,data.length); YzAGhAyw
} };8PPR)\y
Ng1[y4R}
private static class MaxHeap{ Z3A"GWY
-/6Ms%O
void init(int[] data){ 5|oi*b
this.queue=new int[data.length+1]; 5U JMiwP{
for(int i=0;i queue[++size]=data; <d3N2
fixUp(size); (_~Dyvo
} "eKM<S
} BH?fFe&J:`
K%>3ev=y.s
private int size=0; 1f5;^T I
th|TwD&mO
private int[] queue; ebB8.(k9G3
YR68'Sft[
public int get() { GG`;c?d@
return queue[1]; =xHzhh
} 7C^W<SUo
'\B!1B>T
public void remove() { `[.4SIah
SortUtil.swap(queue,1,size--); o}lA\A
fixDown(1); Ns`:=
} yvKKE
file://fixdown s!K9-qZl<
private void fixDown(int k) { K9euNa
int j; zzyD'n7D
while ((j = k << 1) <= size) { !X/O1PM|
if (j < size %26amp;%26amp; queue[j] j++; m9f[nT
if (queue[k]>queue[j]) file://不用交换 VaylbYUCT/
break; I~U;M+n*y
SortUtil.swap(queue,j,k); 14rX:z
k = j; [c#?@S_
} 5!^?H"#c
} (W$>!1~
private void fixUp(int k) { r1Cq8vD*m
while (k > 1) { (C8r^m|A
int j = k >> 1; $T}Dn[.
if (queue[j]>queue[k]) %KmhR2v
break; )u_[cEJHO
SortUtil.swap(queue,j,k); CKRnkTTiV
k = j; F%e5j9X`
} FKu^{'Y6E0
} /hbdQm
Ng<oz*>U
} H}&4#CQ'!
TY*q[AWG
} AG<TY<nqL
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SortUtil： 1jQlwT(:
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package org.rut.util.algorithm; BZWGXzOFh
:jioF{,
import org.rut.util.algorithm.support.BubbleSort; AoN|&o
import org.rut.util.algorithm.support.HeapSort; ?$rHyI
import org.rut.util.algorithm.support.ImprovedMergeSort; 7e`h,e=
import org.rut.util.algorithm.support.ImprovedQuickSort; Lk]/{t0
import org.rut.util.algorithm.support.InsertSort; 0@PI=JZ%
import org.rut.util.algorithm.support.MergeSort; fIg~[VN"
import org.rut.util.algorithm.support.QuickSort; Av^<_`L:
import org.rut.util.algorithm.support.SelectionSort; k8ej.
import org.rut.util.algorithm.support.ShellSort; p3z%Y$!Tm
N"o+;yR
/** @)p?!3{"
* @author treeroot O_/|Wx
* @since 2006-2-2 ~l>2NY
* @version 1.0 ,*'aH z
*/ #`{L_n$c
public class SortUtil { 9q f=P3
public final static int INSERT = 1; - -H%FYF`
public final static int BUBBLE = 2; :~+m9r
public final static int SELECTION = 3; w?zY9Fs=s
public final static int SHELL = 4; .LHzaeJCX
public final static int QUICK = 5; Y]Y]"y$1
public final static int IMPROVED_QUICK = 6; rpO>l
public final static int MERGE = 7; nfzKUJY
public final static int IMPROVED_MERGE = 8; Gf1O7L1rX
public final static int HEAP = 9; DFFB:<
{oc7Chv=/H
public static void sort(int[] data) { 23=SXA!
sort(data, IMPROVED_QUICK); ZpQ8KY$5
} /A~+32B
private static String[] name={ LS4|$X4H`!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _q dLA
}; 2 VGGSLr
%G>V .d
private static Sort[] impl=new Sort[]{ 8NzXe 7
new InsertSort(), U/I+A|S[
new BubbleSort(), y153ax
new SelectionSort(), qJrMr4:F
new ShellSort(), G@;I^_gN
new QuickSort(), PFnq:G^L
new ImprovedQuickSort(), ;Q} H'Wg,
new MergeSort(), 4Gm(P~N
new ImprovedMergeSort(), N:Zf4
new HeapSort() gR:21*&cz
}; |Zrkk>GW:
R~&i8n.
public static String toString(int algorithm){ d8Kxtg Y
return name[algorithm-1]; =C.WM*='
} =3Hv
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public static void sort(int[] data, int algorithm) { !4l\*L
impl[algorithm-1].sort(data); ``4lomz>
} xg2 &
Jf=$h20x
public static interface Sort { CuD^@
public void sort(int[] data); GBsM?A:
} tug\X
*X4$'LSx1
public static void swap(int[] data, int i, int j) { &k2nt
int temp = data; znl_~:.4]X
data = data[j]; Tx'ctd#Y
data[j] = temp; >ey-j\_v
} !,3U_!
} ^ M4-O~