[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; K-N]h
} A9NOeE
int i1=l; 5cPSv?x^F@
int i2=mid+1; 0f_66`
for(int cur=l;cur<=r;cur++){ 8XLxT(YFIs
if(i1==mid+1) Y:DNu9
data[cur]=temp[i2++]; xC= y^- 1
else if(i2>r) Y{+zg9L*
data[cur]=temp[i1++]; em f0sL
else if(temp[i1] data[cur]=temp[i1++]; ;D%$Eh&oma
else Bl>_&A)
data[cur]=temp[i2++]; 53g8T+`\(
} 2tm~QL
} tI/mE[W
x.jYip
} 9^6|ta0;0
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改进后的归并排序: K,`).YK
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package org.rut.util.algorithm.support; /vFxVBX
$O;N/N:m
import org.rut.util.algorithm.SortUtil; oO!1
(mD-FR@#
/** 4d{"S02h
* @author treeroot r[C3u[
* @since 2006-2-2 D#vn {^c8O
* @version 1.0 {hW +^
*/ ~9`^72
public class ImprovedMergeSort implements SortUtil.Sort { clPZd
]be0I)
private static final int THRESHOLD = 10; gJ)h9e*m^
'sT}DX(7M
/* /K2.V@T
* (non-Javadoc) y9l#;<b
* [%gK^Zt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3Hb .ZLE#
*/ pIU#c&%<9
public void sort(int[] data) { CSd9\V
int[] temp=new int[data.length]; *IMF4x5M
mergeSort(data,temp,0,data.length-1); >oM9~7f
} bc0)'a\
lOowMlf@2
private void mergeSort(int[] data, int[] temp, int l, int r) { g:~?U*f-
int i, j, k; /iuUUCk
int mid = (l + r) / 2; 3iwoMrp
if (l == r) Lz#$_Am'H
return; e')&ODQ H
if ((mid - l) >= THRESHOLD) Mipm&5R
mergeSort(data, temp, l, mid); U5@TaGbx
else Egjk^:@
insertSort(data, l, mid - l + 1); fl5UY$a2-
if ((r - mid) > THRESHOLD) q/d5P
mergeSort(data, temp, mid + 1, r); 1pYmtr
else MA/"UV&M(
insertSort(data, mid + 1, r - mid); eMpEFY
g%fJyk'
for (i = l; i <= mid; i++) { vV:MS O'r
temp = data; )<]w23i
} 6N)< o ;U
for (j = 1; j <= r - mid; j++) { ~vjr;a(B
temp[r - j + 1] = data[j + mid]; .yFg$|yG
} ei|*s+OZu
int a = temp[l]; M&}oat*
int b = temp[r]; _Vk,&'
for (i = l, j = r, k = l; k <= r; k++) { }Uqa8&
if (a < b) { ?@g;[310`
data[k] = temp[i++]; IgHs&=
a = temp; 61s2bt#
} else { R&x7Iq:=D
data[k] = temp[j--]; }LHT#{+x
b = temp[j]; \Z6gXO_
} `ykMh>*{
} XEgx#F ;F
} uV/HNzC
.JD4gF2N
/** mER8> <
* @param data {'=Nb 5F
* @param l U4^p({\|-
* @param i %Zv(gI`A
*/ H>X\C;X[
private void insertSort(int[] data, int start, int len) { ^NnU gj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nY"rqILX?
} l6}b{e
} D<D k1
} m|e*Jc
} @dT: 1s
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堆排序： TW-zh~|F
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package org.rut.util.algorithm.support; wCC~tuTpr
^]sMy7X0IK
import org.rut.util.algorithm.SortUtil; 23u1nU[0
#1qVFU
/** D?*sdm9r`
* @author treeroot wTMHoU*>
* @since 2006-2-2 G|6|;
* @version 1.0 qeK
*/ Z9 q{r s
public class HeapSort implements SortUtil.Sort{ 13_+$DhU-L
}JpslY*aS
/* (non-Javadoc) OCOO02Wq1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yZ(Nv $[5
*/ yK>0[6l
public void sort(int[] data) { q:~`7I
MaxHeap h=new MaxHeap(); qY~$wVY(
h.init(data); hO<w]jV,
for(int i=0;i h.remove(); meM.?kk(
System.arraycopy(h.queue,1,data,0,data.length); +v[$lh+
} Oz9Mqcx
Y4~wNs6
private static class MaxHeap{ !>kv.`|7~
sKG~<8M}
void init(int[] data){ i37a}.;
this.queue=new int[data.length+1]; ]stLC; nI
for(int i=0;i queue[++size]=data; fFTvf0j
fixUp(size); B,m$ur#$
} }2!5#/^~
} X^_+%U
xO9]yULgu
private int size=0; Z\gg<Q
9snyX7/!L
private int[] queue; '__3[D
ZNH*[[Pf
public int get() { 4M<JfD
return queue[1]; f{ 4G
} |<Dx
}A'<?d8
public void remove() { ,w/mk$v
SortUtil.swap(queue,1,size--); nXeK,C
fixDown(1); 5N3!!FFE
} HfeflGme*
file://fixdown ]R0A{+]n
private void fixDown(int k) { luz%FY:
int j; [|;Zxb:
while ((j = k << 1) <= size) { ':R3._tw\
if (j < size %26amp;%26amp; queue[j] j++; I9G*iu=U
if (queue[k]>queue[j]) file://不用交换 /&!d
break; ZEyGqCf3
SortUtil.swap(queue,j,k); R#Nd|f<
k = j; 7%"\DLA
} uSQ>oi]
} \F+o=
private void fixUp(int k) { =|JIY
while (k > 1) { LX?r=_\
int j = k >> 1; N5an9r&z(1
if (queue[j]>queue[k]) 0)Um W{
break; VU0tyj$
SortUtil.swap(queue,j,k); .]ZuG
k = j; =UKR<@QrK
} .gkPG'm[
} Md?bAMnG+}
_kY[8e5
} dV=5_wXZ$
6r-n6#=
} 3w:Z4]J
0|>
SortUtil： |e[0Qo@
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package org.rut.util.algorithm; 0S5C7df
_}9R}
import org.rut.util.algorithm.support.BubbleSort; >=W#z
import org.rut.util.algorithm.support.HeapSort; JO^ [@
import org.rut.util.algorithm.support.ImprovedMergeSort; sriq(A
import org.rut.util.algorithm.support.ImprovedQuickSort; nh&<fnh
import org.rut.util.algorithm.support.InsertSort; >dm._*M
import org.rut.util.algorithm.support.MergeSort; '%RK KA
import org.rut.util.algorithm.support.QuickSort; I~]mX;
import org.rut.util.algorithm.support.SelectionSort; MbFe1U]B
import org.rut.util.algorithm.support.ShellSort; #|_UA}Y
AW;)_|xM
/** '>mb@m
* @author treeroot Di"9 M(6vf
* @since 2006-2-2 &?Z)V-1H
* @version 1.0 Jx>B %vZ\
*/ pD6g+Taj
public class SortUtil { m^x\@!N:(
public final static int INSERT = 1; q.b4m 'J
public final static int BUBBLE = 2; PXu<4VF
public final static int SELECTION = 3; g!Yh=kA'N
public final static int SHELL = 4; pfQZ|*>lkb
public final static int QUICK = 5; Hi" n GH
public final static int IMPROVED_QUICK = 6; l}-`E@w
public final static int MERGE = 7; /Vd#q)b%T
public final static int IMPROVED_MERGE = 8; 1Da [!^u,D
public final static int HEAP = 9; _xL&sy09t
-+_aL4.
public static void sort(int[] data) { -Fc#
sort(data, IMPROVED_QUICK); $H@)hY8wA
} p'!,F; xX
private static String[] name={ p{svXP K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W#_gvW
}; 4NR5?s
5a|m}2IX
private static Sort[] impl=new Sort[]{ NE%yv,B
new InsertSort(), C(*@-Npf[
new BubbleSort(), x&/Syb
new SelectionSort(), $,zM99
new ShellSort(), O8N0]Mz
new QuickSort(), L?C~ qS2g
new ImprovedQuickSort(), @=#s~3
new MergeSort(), Z*aU2Kr`;
new ImprovedMergeSort(), [%,=0P}
new HeapSort() PyxN_agf
}; $5CY<,f
9x^ /kAB
public static String toString(int algorithm){ ~)IJE+e>}
return name[algorithm-1]; WJ4UJdf'
} @%G"i:HZ&
R/cq00g
public static void sort(int[] data, int algorithm) { Jd2Y)
impl[algorithm-1].sort(data); V+~{a:8[pq
} iwjl--)@K
5qfKV&D
public static interface Sort { 2OlC7X{
public void sort(int[] data); {!Z_&i5
} U105u.#7
u,SZ-2K!7~
public static void swap(int[] data, int i, int j) { dB)hW'J?
int temp = data; WM )g(i~(
data = data[j]; QR$sIu@%
data[j] = temp; 4m!3P"$
} j?hyN@ns
} pz}hh^]t