[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; ^j2ve's:
} 9{e/ V)
int i1=l; o'Fyo4Qd
int i2=mid+1; ObJ-XNcNH
for(int cur=l;cur<=r;cur++){ <oi'yr
if(i1==mid+1) ?XeaoD/
data[cur]=temp[i2++]; !pC`vZG"
else if(i2>r) j#u{(W'r
data[cur]=temp[i1++]; *>2e4j]
else if(temp[i1] data[cur]=temp[i1++]; BHiG3fP
else ohs`[U=%~
data[cur]=temp[i2++]; B`||4*
} ox_DEg7l
} R"l6|9tmP
lEw;X78+
} Yf/e(nV
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改进后的归并排序: zhbSiw
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package org.rut.util.algorithm.support; ~2nt33"
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import org.rut.util.algorithm.SortUtil; )a5ON8?
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/** K#'$_0.
* @author treeroot =>kg]
* @since 2006-2-2 4GH&u,
* @version 1.0 +XSe;xk;rD
*/ A@Lr(L
public class ImprovedMergeSort implements SortUtil.Sort { ?!<Q8=
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private static final int THRESHOLD = 10; F'F6 &a+
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/* J{\(Y#|rHs
* (non-Javadoc) &['L7
* Mlr'h}:H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j9yOkaVEg
*/ |i~-,:/-Y
public void sort(int[] data) { BsL+9lNue
int[] temp=new int[data.length]; @!j6y(@
mergeSort(data,temp,0,data.length-1); 8TG|frS
} P{BW^kAdH
W /*?y&
private void mergeSort(int[] data, int[] temp, int l, int r) { 2(x| %
int i, j, k; X @pm!c#
int mid = (l + r) / 2; c##tP*(
if (l == r) kr@!j@j$
return; ! 2knSS
if ((mid - l) >= THRESHOLD) ~H:=p
mergeSort(data, temp, l, mid); U&=pKbTe
else 8aC=k@YE
insertSort(data, l, mid - l + 1); _n!>*A!
if ((r - mid) > THRESHOLD) Kv9FqrDj
mergeSort(data, temp, mid + 1, r); kM[!UOnC!<
else $06('Hg&
insertSort(data, mid + 1, r - mid); 'U*#71S
dh.{lvlX|
for (i = l; i <= mid; i++) { jl]3B
temp = data; Yyd]s\W
} 'rS\9T
for (j = 1; j <= r - mid; j++) { zb4{nzX=
temp[r - j + 1] = data[j + mid]; j%D{z5,nKm
} iq?T&44&
int a = temp[l]; ~wF3$H.@;
int b = temp[r]; +> d;%K
for (i = l, j = r, k = l; k <= r; k++) { 9+$IulOvk
if (a < b) { 2+?W{yAEi
data[k] = temp[i++]; *DXX*9 0
a = temp; ?B$L'i[l
} else { F6{/iF
data[k] = temp[j--]; I{ki))F
b = temp[j]; = Ezg3$%-
} xK)<763q>
} M2RkrW#
} s;E(51V<>
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/** y\(xYB>T
* @param data eM5-v-
* @param l n%G[Y^^,
* @param i G@Sqg
*/ Z!Z{Gm3
private void insertSort(int[] data, int start, int len) { a(*"r:/lD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )f8;ze
} &j ;91wEn
} 7E#h(bt j
} ixK9/5T
} Dgc6rv#
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堆排序： r}sO},i
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package org.rut.util.algorithm.support; cHR*.
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import org.rut.util.algorithm.SortUtil; =cb!2%?}
5O]ZX3z>
/** WNb2"W
* @author treeroot \x:U`T
* @since 2006-2-2 o8H\l$
* @version 1.0 98| v.d
*/ FGie*t
public class HeapSort implements SortUtil.Sort{ >R_m@$`
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/* (non-Javadoc) oM^vJ3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q4*{+$A
*/ &/2+'wCp5
public void sort(int[] data) { "L`BuAB
MaxHeap h=new MaxHeap(); {O).!
h.init(data); 2L[!~h2
for(int i=0;i h.remove(); 2<h~: L
System.arraycopy(h.queue,1,data,0,data.length); `QRXQ c
} D5({&.X[-
8z7eL>)
private static class MaxHeap{ PhV/WjCZ
X8}\m%gCU
void init(int[] data){ *GY8#Az
this.queue=new int[data.length+1]; 2TQZu3$c
for(int i=0;i queue[++size]=data; %X^qWKix}m
fixUp(size); oR!h eCnu
} lq]8zm<$]
} rZ5xQ#IA
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private int size=0; ;I80<SZ
^'du@XCf}
private int[] queue; fv+d3s?h
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public int get() { m\CU,9;;(
return queue[1]; 6R8>w,
} R]Z#VnL@qz
!>ZBb\EyK
public void remove() { fx4#R(N
SortUtil.swap(queue,1,size--); g:xg ~H2
fixDown(1); $%!06w#u
} <n2'm
file://fixdown AZ^>osr
private void fixDown(int k) { Anpp`>}N
int j; 6I=xjgwvf
while ((j = k << 1) <= size) { . XbDb
if (j < size %26amp;%26amp; queue[j] j++; fF>hca>
if (queue[k]>queue[j]) file://不用交换 lKU{jWA
break; `#85r{c$:
SortUtil.swap(queue,j,k); C+ Y;D:
k = j; Z+EZ</'(a
} \}9)`1D
} \o3s&{+y,
private void fixUp(int k) { xhCQRw
while (k > 1) { uPN^o.,/.
int j = k >> 1; I![/bwObG
if (queue[j]>queue[k]) m@*aA}69
break; e]ST0J"
SortUtil.swap(queue,j,k); \fSruhD
k = j; vN@04a\h
} N+5f.c+S-
} {R[V
RhT:]
} K4E2W9h
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} >ifys)wg>
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SortUtil： "}%j'
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package org.rut.util.algorithm; -kP2Brm
9-&@Y
import org.rut.util.algorithm.support.BubbleSort; TNeL%s?B3
import org.rut.util.algorithm.support.HeapSort; {|j-e{*
import org.rut.util.algorithm.support.ImprovedMergeSort; $AvaOI.l
import org.rut.util.algorithm.support.ImprovedQuickSort; p`Tl)[*
import org.rut.util.algorithm.support.InsertSort; Y#-c<o}f
import org.rut.util.algorithm.support.MergeSort; OVgak>$
import org.rut.util.algorithm.support.QuickSort; EG &me
import org.rut.util.algorithm.support.SelectionSort; W>?aZv
import org.rut.util.algorithm.support.ShellSort; g2}aEfp!H
v;g,qO!LJ
/** 8'fF{C
* @author treeroot RtxAIMzh?
* @since 2006-2-2 ]SL+ZT
* @version 1.0 ){u# (sW
*/ }TuMMO4+
public class SortUtil { -Gl!W`$I`
public final static int INSERT = 1; LV0gw"
public final static int BUBBLE = 2; ?}W#j
public final static int SELECTION = 3; -;HZ!Lf
public final static int SHELL = 4; t4~?m{
public final static int QUICK = 5; 'u%_Ab_H
public final static int IMPROVED_QUICK = 6; 5^l-3s?M
public final static int MERGE = 7; 2\O!vp>|-
public final static int IMPROVED_MERGE = 8; =*6frC~
public final static int HEAP = 9; tBwPB#:W
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public static void sort(int[] data) { wa&:86~l?
sort(data, IMPROVED_QUICK); p&`I#6{
} /Jc^XWf
private static String[] name={ B=X_c5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V1G5Kph
}; " ;8kKR
)liNjY@
private static Sort[] impl=new Sort[]{ Q'ib7R;V,
new InsertSort(), {+kWK;1
new BubbleSort(), L+lye Ir'
new SelectionSort(), @Y(7n/*
new ShellSort(), XC390t
new QuickSort(), y|9 LtQ
new ImprovedQuickSort(), )^)|b5,
new MergeSort(), Kl(u~/=6
new ImprovedMergeSort(), #0#6eT{-
new HeapSort() la]Zk
}; (15.?9
NB( GE
public static String toString(int algorithm){ `@:k*d
return name[algorithm-1]; ,S, R6#3G
} V|nJ%G\
xFp9H'j{
public static void sort(int[] data, int algorithm) { "68=dC
impl[algorithm-1].sort(data); ,? &$c+
} 1ahb:Mjv
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public static interface Sort { &,]yqG 2
public void sort(int[] data); y] $-:^
} ,qdZ6bv,]|
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public static void swap(int[] data, int i, int j) { f-}_
int temp = data; B|;?#okx
data = data[j]; :?#wWF.
data[j] = temp; 0J= $ A
} BT5~MYBl
} gaL.5_1