[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; |I85]'K9a
} q35%t61Lc
int i1=l; 0v+5&Jk
int i2=mid+1; <J[*~v%(
for(int cur=l;cur<=r;cur++){ &{ntx~Eq
if(i1==mid+1) };29'_.."x
data[cur]=temp[i2++]; k&yy_r
else if(i2>r) {K_YW
data[cur]=temp[i1++]; /0Zwgxt4?7
else if(temp[i1] data[cur]=temp[i1++]; q\d'}:kfu
else &'T7 ~M:
data[cur]=temp[i2++]; cf@:rHB}
} h#;fBQ]
} \AkeC6[D
E2!;W8M
} }^)M)8zS
!\+SE"ml
改进后的归并排序: gHYYxhW$
B6OggJ9Iq
package org.rut.util.algorithm.support; O#cXvv]Z*
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import org.rut.util.algorithm.SortUtil; [4PG_k[uTJ
vnXpC!1
/** XW5r@:e
* @author treeroot mbJ#-^}V
* @since 2006-2-2 VEE:Z^U!
* @version 1.0 PyzWpf
*/ 9.SPxd~
public class ImprovedMergeSort implements SortUtil.Sort { pz.<5
j31 Sc3vG
private static final int THRESHOLD = 10; yd`.Rb&V
f0MHh5
/* R"=G?d)
* (non-Javadoc) @qg=lt|(F
* 1fEV^5I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V"T;3@N/4
*/ cnhYrX^
public void sort(int[] data) { 5FH#)
int[] temp=new int[data.length]; Q9FY.KUM
mergeSort(data,temp,0,data.length-1); {Qlvj.Xw
} \>:(++g
cz&FOP+!
private void mergeSort(int[] data, int[] temp, int l, int r) { rw8db'
int i, j, k; oNl_r:G
int mid = (l + r) / 2; $;$_N43
if (l == r) GJ{]}fl
return; qo$<&'r
if ((mid - l) >= THRESHOLD) nyTfTn
mergeSort(data, temp, l, mid); Ql [=
else <@@.~Qm'
insertSort(data, l, mid - l + 1); 83)2c a
if ((r - mid) > THRESHOLD) YujhpJ<
mergeSort(data, temp, mid + 1, r); j.AAY?L
else <7?MutHM-
insertSort(data, mid + 1, r - mid); H[!by)H
iMJjWkk
for (i = l; i <= mid; i++) { %UgyGQeo
temp = data; LxsB.jb-
} v3.JG]zLpP
for (j = 1; j <= r - mid; j++) { eUx|_*`
temp[r - j + 1] = data[j + mid]; Y~fds#y0
} S(9fGh
int a = temp[l]; ]e)<CE2
int b = temp[r]; 9J0m
for (i = l, j = r, k = l; k <= r; k++) { U,aV{qz
if (a < b) { ^ 8egn|
data[k] = temp[i++]; gQ,PG
a = temp; /':kJOk<[
} else { A5Y z|
data[k] = temp[j--]; S :9zz
b = temp[j]; b_cD >A
} <:>a51HBX
} :2K0/@<x
} Z`q?pE>R
@/B&R^aVZ
/** b.;F)(
* @param data hZc$`V=R
* @param l xNE<$Bz
* @param i !XzRV?Ih;
*/ R9fM9
private void insertSort(int[] data, int start, int len) { /R 2:Js
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u@[D*c1!H
} vKol@7%N
} a&wl-
} BEifUgCh
} z/6eP`jj
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堆排序： Ol D]*=.cO
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package org.rut.util.algorithm.support; `?91Cw=`
5A:b \
import org.rut.util.algorithm.SortUtil; |BF4F5wC?
D{ @x
/** F.^1|+96
* @author treeroot >$?$&+e}
* @since 2006-2-2 iI&J_Y{1a_
* @version 1.0 yC6XO&:g
*/ yH@W6'.
public class HeapSort implements SortUtil.Sort{ I>b!4?h
b":cj:mxL
/* (non-Javadoc) YM/GSSq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Rb|\!
*/ 1+.(N:) +
public void sort(int[] data) { "qR qEpD%
MaxHeap h=new MaxHeap(); "4oY F:h
h.init(data); =<n+AqJ%
for(int i=0;i h.remove(); *siS4RX2
System.arraycopy(h.queue,1,data,0,data.length); |*i0h`a
} W?5^cEF
qZG "{8
private static class MaxHeap{ vfcj,1
Mm+_>
void init(int[] data){ 50Pz+:
this.queue=new int[data.length+1]; QV4{=1A
for(int i=0;i queue[++size]=data; O: :X$O7
fixUp(size); e>z3\4
} pDrM8)r
} ORyFE:p$
8;-a_VjA)
private int size=0; &0*j nb
x.xfMM2n
private int[] queue; D CcM~
'8}*erAg
public int get() { ja#E}`wC4
return queue[1]; W;eHDQ|
} W`C2zbC
s+h`,gg9
public void remove() { BC9rsb
SortUtil.swap(queue,1,size--); <Gr{h>b
fixDown(1); Qt+ K,LY
} A"2k,{d
file://fixdown OB>Pk_eQK
private void fixDown(int k) { gj0gs
int j; NYm2fFPc
while ((j = k << 1) <= size) { q1.w8$
if (j < size %26amp;%26amp; queue[j] j++; y4w{8;Mh
if (queue[k]>queue[j]) file://不用交换 Vf`1'GY
break; "U4Sn'&h@
SortUtil.swap(queue,j,k); 4b,N"w{v
k = j; {%)bxk6
} fnN"a Z
} LIT{rR#8
private void fixUp(int k) { Gp6|M2Vu_5
while (k > 1) { b(wW;C'#0p
int j = k >> 1; C;-9_;&
if (queue[j]>queue[k]) !X e
break; pGc_Klq
SortUtil.swap(queue,j,k); `lRZQ:27X
k = j; F%UyFUz
} N~=p+Ow[H
} ts<5%{M(
CC;T[b&
} c0sU1:e0
y9cW&rDH
} <w}YD @(f
2,{m>fF
SortUtil： ypSW9n
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package org.rut.util.algorithm; WV]Si2pOZ
<7~HG(ks
import org.rut.util.algorithm.support.BubbleSort; BA4qQCS;5
import org.rut.util.algorithm.support.HeapSort; }S\\"SBC
import org.rut.util.algorithm.support.ImprovedMergeSort; m-xSF]q=<
import org.rut.util.algorithm.support.ImprovedQuickSort; h# c.HtVE
import org.rut.util.algorithm.support.InsertSort; %AwR4"M
import org.rut.util.algorithm.support.MergeSort; C (L1
import org.rut.util.algorithm.support.QuickSort; F.<sKQ&A
import org.rut.util.algorithm.support.SelectionSort; l{[{pAm
import org.rut.util.algorithm.support.ShellSort; R4.$9_ui
OlL FuVR
/** P:eY>~m<;
* @author treeroot q"7rd?r52
* @since 2006-2-2 2MS1<VKZ@
* @version 1.0 ^oDCF
*/ \dO9nwa?
public class SortUtil { 52 ?TLID
public final static int INSERT = 1; _WO*N9Iz
public final static int BUBBLE = 2; gXBC= ?jl
public final static int SELECTION = 3; Q x}\[
public final static int SHELL = 4; >k)}R|tJ
public final static int QUICK = 5; &ejJf{id
public final static int IMPROVED_QUICK = 6; !ba /]A/
public final static int MERGE = 7; TPEg>[
public final static int IMPROVED_MERGE = 8; i0; p?4`m
public final static int HEAP = 9; *p0n{F9
l*V]54|ON3
public static void sort(int[] data) { t}n:!v"|+O
sort(data, IMPROVED_QUICK); $$ma1.t"
} ca%s$' d
private static String[] name={ #usi1UWB#Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :y^0]In
}; 'id]<<F
f_2tMiy5
private static Sort[] impl=new Sort[]{ \Ld/'Z;w
new InsertSort(), DC4O@"
new BubbleSort(), _+73Y'
new SelectionSort(), Y7g^ ?6
new ShellSort(), kcGs2Y_*&
new QuickSort(), 7VQ|3`!<
new ImprovedQuickSort(), Sqw:U|h\FS
new MergeSort(), 2Hl0besm
new ImprovedMergeSort(), I-<U u2
new HeapSort() TJjcX?:(
}; :)hS-*P
rG)K?B~
public static String toString(int algorithm){ /R\]tl#2j
return name[algorithm-1]; QT)D|]bH
} wq+%O,
gx,BF#8}
public static void sort(int[] data, int algorithm) { &Z3g$R 9
impl[algorithm-1].sort(data); 6a$=m3ic
} x$ z9:'U
k@vN_Un
public static interface Sort { oRH]67(Z
public void sort(int[] data); .hO) R.
} /E8{:>2
Jse;@K5y
public static void swap(int[] data, int i, int j) { CEbZj z|
int temp = data; aly1=j
data = data[j]; 2IDN?Mw
data[j] = temp; 3<">1] /,
} @)nxX))a
} kYMKVR