[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; 4Bk9d\z
} C(}N*e1
int i1=l; cCO2w2A[*
int i2=mid+1; Qgxpq{y
for(int cur=l;cur<=r;cur++){ !M;><b}=5
if(i1==mid+1) >wf.C%
data[cur]=temp[i2++]; P; 9{;
else if(i2>r) UB,:won
data[cur]=temp[i1++]; @k3xk1*
else if(temp[i1] data[cur]=temp[i1++]; ]h?p3T$h
else PAS0 D #
data[cur]=temp[i2++]; u_jhmKr~
} 5LzP0F U
} aM|;3j1p
pFcCe 'd"
} DLd1Cl:"~:
n 'E:uXv"
改进后的归并排序: +MyXIWmD
#"!q_@b,D
package org.rut.util.algorithm.support; B3'-:
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import org.rut.util.algorithm.SortUtil; !dGSZ|YZ
Ft 6{g JBG
/** D2]i*gs
* @author treeroot SYwB #|
* @since 2006-2-2 GL'l "L
* @version 1.0 `%Dz 8Z
*/ jW;g{5X
public class ImprovedMergeSort implements SortUtil.Sort { <3!Q Xc
tO+Lf2Ni+
private static final int THRESHOLD = 10; 0F9p'_C
D8f4X w}=
/* 1UkGjw1J
* (non-Javadoc) D|D)782
* CqR^w(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l$ufW|
*/ Qm>2,={h
public void sort(int[] data) { nd,2EX<bE
int[] temp=new int[data.length]; `&URd&ouJD
mergeSort(data,temp,0,data.length-1); .> 5[;
} |OBh:d_B]
;}}k*< Z
private void mergeSort(int[] data, int[] temp, int l, int r) { 'q\[aKEX=
int i, j, k; J=6( 4>
int mid = (l + r) / 2; "ifv1KZ#
if (l == r) rmJ`^6V
return; NM+(ss'
if ((mid - l) >= THRESHOLD) v\dP
mergeSort(data, temp, l, mid); Ot;)zft
else ;VS$xnZ
insertSort(data, l, mid - l + 1); mOfTq] @B
if ((r - mid) > THRESHOLD) sw+vyBV)r
mergeSort(data, temp, mid + 1, r); 1.I58(0~+
else z -uW,
insertSort(data, mid + 1, r - mid); %<{1N|
+*Zjo&pc
for (i = l; i <= mid; i++) { 4WP@ F0@n3
temp = data; s@(ME1j(U!
} IsiBn(1Z
for (j = 1; j <= r - mid; j++) { )`K!XX$%
temp[r - j + 1] = data[j + mid]; K#LDmC
} FK~*X3'
int a = temp[l]; 65U&P5W
int b = temp[r]; L\xR<m<,
for (i = l, j = r, k = l; k <= r; k++) { <+_WMSf;4
if (a < b) { SAhk`_
data[k] = temp[i++]; vP'#x
a = temp; 0DX)%s,KO
} else { @1s 2#)l(
data[k] = temp[j--]; 3|PV.
b = temp[j]; _*++xF1
} th%T(D5n
} yq12"Rs
} #Wq@j1?
#vzt6x@*
/** t5k=ngA
* @param data eI1C0Uz1
* @param l ?g4S51zpp
* @param i l7#2 e ORm
*/ 5xhYOwQBo
private void insertSort(int[] data, int start, int len) { R5=M{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?*&5`Xh
} Yc^,Cj{OM
} ,c|Ai(U
} 1*?L>@Wdy
} <=]:ED $V@
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堆排序： 95sK;`rE+
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package org.rut.util.algorithm.support; xM?tdQ~VHY
6 -BC/
import org.rut.util.algorithm.SortUtil; ^#]eCXv
MH/bJtNq
/** v.F|8 cG
* @author treeroot %xdyGAl:
* @since 2006-2-2 HL%|DCo
* @version 1.0 ,L\>mGw
*/ {_ {zs!r
public class HeapSort implements SortUtil.Sort{ vngn^2
Y%^qt]u.8
/* (non-Javadoc) }pKKNZ`[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R%6KxN)+@
*/ GHpP *x
public void sort(int[] data) { 6|QIzs<Z-X
MaxHeap h=new MaxHeap(); AbIYdFXB
h.init(data); >[S\NAE>
for(int i=0;i h.remove(); $:D\yZ,
System.arraycopy(h.queue,1,data,0,data.length); >,x``-
} lJt?0;gn
WmuYHEU
private static class MaxHeap{ 5=Il2
7`tJ/xtMy;
void init(int[] data){ EzU3'x
this.queue=new int[data.length+1]; [JKLlR
for(int i=0;i queue[++size]=data; @PV3G KJ
fixUp(size); Mp06A.j[
} ^e--4B9|
} %[on.Q'1]2
'#>(JN5\
private int size=0; _Uhl4Mh
rC6@ ]
private int[] queue; 3cc;BWvM
!-4VGt&c,
public int get() { o @nsv&i
return queue[1]; @4Lol2
} ,Bl_6ZaL
dst!VO: M
public void remove() { {dwlW`{
SortUtil.swap(queue,1,size--); $pauPEe
fixDown(1); ~7:Q+ 0,,
} Qp+M5_
file://fixdown )H+p6<
private void fixDown(int k) { W4=A.2[q
int j; JhvT+"~
while ((j = k << 1) <= size) { tk+4noA
if (j < size %26amp;%26amp; queue[j] j++; Zou;o9Ww
if (queue[k]>queue[j]) file://不用交换 a~Yq0d?`D
break; %v[KLMo'(
SortUtil.swap(queue,j,k); 9>=S@hVMd
k = j; ]xPy-j6C
} ^GNL:D%6d
} 36}&{A
private void fixUp(int k) { zGa V^X
while (k > 1) { ,,;vG6^a
int j = k >> 1; NG?g(
if (queue[j]>queue[k]) T>w;M?`9K
break; 04:QEC"9mj
SortUtil.swap(queue,j,k); uG(XbDZZ1W
k = j; EPU3Jban
} [0lO0ik>G
} XO}SPf-
!UHX?<3r
} yeA]j[ #
fa!8+kfi
} A}i>ys
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SortUtil： l_pf9!z
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package org.rut.util.algorithm; lqvP Dz
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import org.rut.util.algorithm.support.BubbleSort; s?PB ]Tr
import org.rut.util.algorithm.support.HeapSort; =z\/xzAwX
import org.rut.util.algorithm.support.ImprovedMergeSort; eE@7AM
import org.rut.util.algorithm.support.ImprovedQuickSort; j|LOg
import org.rut.util.algorithm.support.InsertSort; 5:%`&B\
import org.rut.util.algorithm.support.MergeSort; fni7HBV?
import org.rut.util.algorithm.support.QuickSort; szp.\CMz
import org.rut.util.algorithm.support.SelectionSort; sU/vXweky"
import org.rut.util.algorithm.support.ShellSort; W&7(
goc; .~?
/** @>`qfy?
* @author treeroot fYlqaO4[
* @since 2006-2-2 +@~e9ZG%a
* @version 1.0 S2EV[K8#
*/ o0TB>DX$`
public class SortUtil { (+(bw4V/
public final static int INSERT = 1; zEDN^K '
public final static int BUBBLE = 2; w@H@[x
public final static int SELECTION = 3; K;]Dh?
public final static int SHELL = 4; 9&{HD
public final static int QUICK = 5; PNH>LT^
public final static int IMPROVED_QUICK = 6; M6y|;lh''c
public final static int MERGE = 7; #v*3-) 8
public final static int IMPROVED_MERGE = 8; dv?t;D@p!
public final static int HEAP = 9; 5>h/LE]"
I>lblI$7
public static void sort(int[] data) { 37*2/N2
sort(data, IMPROVED_QUICK); X39%O'
} S 9;FD3
private static String[] name={ Bnw^W_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =KHX_ib
}; {Rn*)D9
@_?Uowc8
private static Sort[] impl=new Sort[]{ 7Ac.^rv5
new InsertSort(), jWso'K
new BubbleSort(), y0'WB`hNQ
new SelectionSort(), dRUmC H
new ShellSort(), HahA} Q
new QuickSort(), !w/]V{9`X
new ImprovedQuickSort(), P>Ru
new MergeSort(), ;8w CQ
new ImprovedMergeSort(), N!<X%Ym
new HeapSort() lU.aDmy<
}; |(uo@-U
V-18~+F~"a
public static String toString(int algorithm){ n!U1cB{
return name[algorithm-1]; 6n H'NNS:J
} w I[Hoi V
Nhtc^DX
public static void sort(int[] data, int algorithm) { WLH ;{
impl[algorithm-1].sort(data); &:~9'-O
} /*Gbl
lYU?j|n
public static interface Sort { df/7u}>9
public void sort(int[] data); zUWeOR'X
} nLR
% @!hf!
public static void swap(int[] data, int i, int j) { >RrG&Wv59
int temp = data; gp+@+i>b+[
data = data[j]; zuF]E+
data[j] = temp; lU`t~|>r+
} ,M :j5
} p{&o{+c