[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; $ #*";b)QY
} C8xxR~mq
int i1=l; +sW;p?K7eO
int i2=mid+1; mw\ z'
for(int cur=l;cur<=r;cur++){ :j)v=qul
if(i1==mid+1) 1@i|[dq
data[cur]=temp[i2++]; `<"@&N^d
else if(i2>r) {\-9^RL
data[cur]=temp[i1++]; &2P+9j>
else if(temp[i1] data[cur]=temp[i1++]; M3 TsalF
else G[bWjw86O
data[cur]=temp[i2++]; }%T8?d]
} C-}@.wr(
} &P0jRT3e#Y
v>[U*E
} X%Lhu6F
t)i{=8rq
改进后的归并排序: $M0F~x
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package org.rut.util.algorithm.support; pef)c,U$
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import org.rut.util.algorithm.SortUtil; *3Vic
#B^A"?*S
/** "KiTjl`M,
* @author treeroot )Z=S'm k4_
* @since 2006-2-2 XHh!Q0v;
* @version 1.0 1^HmM"DD
*/ pnpx`u;
public class ImprovedMergeSort implements SortUtil.Sort { 4#D<#!]^
7~I*u6zY
private static final int THRESHOLD = 10; L,+m5wKj[
}Z,xF`
/* 0p31C7!
* (non-Javadoc) z{q|HO
* >x3$Ld
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Od,P,t9
*/ Fs3rsig
public void sort(int[] data) { -_KO}_
int[] temp=new int[data.length]; Rt9S
mergeSort(data,temp,0,data.length-1); '|7'dlW
} FB>^1B]]
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private void mergeSort(int[] data, int[] temp, int l, int r) { 'Zket=Sm;
int i, j, k; #$^vP/"$
int mid = (l + r) / 2; Qf .ASC
if (l == r) yU{Q`6u T
return; <NYf!bx
if ((mid - l) >= THRESHOLD) v]?zG&Jh
mergeSort(data, temp, l, mid); "G[yV>pxv
else [Nw%fuB
insertSort(data, l, mid - l + 1); wyi%!H
if ((r - mid) > THRESHOLD) 9sI&&Jg
mergeSort(data, temp, mid + 1, r); i[#XYX'\
else |b+ZKRW
insertSort(data, mid + 1, r - mid); !!\x]$v
8{f~tPY
for (i = l; i <= mid; i++) { Gm.sl},
temp = data; hRFm]q
} b;5&V_
for (j = 1; j <= r - mid; j++) { h6(\ tRd!\
temp[r - j + 1] = data[j + mid]; (rE.ft5$9
} ~85>.o2RDW
int a = temp[l]; ea3f`z
int b = temp[r]; *I6W6y;E=
for (i = l, j = r, k = l; k <= r; k++) { /n3Qcht
if (a < b) { A0l-H/l7
data[k] = temp[i++]; q(9S4F
a = temp; +td]g9Ie
} else { %ZR<z$
data[k] = temp[j--]; gy*c$[NS$
b = temp[j]; %jErLg
} 8JFvz(SK>
} 4/?@%
} ecsQshR
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/** |6O7_U#q
* @param data NE)Yd7m-
* @param l 5I6u 2k3
* @param i &~K4I
*/ M?ObK#l!_
private void insertSort(int[] data, int start, int len) { 8:sQB%BB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]/6i#fTw
} X? l5}
} /_D_W,#P
} 3Ow bU
} 1$#1
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堆排序： {bP )Fon
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package org.rut.util.algorithm.support; p&$O}AX|
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import org.rut.util.algorithm.SortUtil; WXs?2S*
R^?9V=Y<T
/** hCPyCq]
* @author treeroot #;])/8R%
* @since 2006-2-2 NyR,@n1
* @version 1.0 `Iqh\oY8-
*/ ^:u-wr8?{
public class HeapSort implements SortUtil.Sort{ :LxsiDrF[
p~3 (nk<+
/* (non-Javadoc) j_{f(.5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,.z?=]'en
*/ NA!?.zn
public void sort(int[] data) { eqSCE6r9x
MaxHeap h=new MaxHeap(); qx1+'
h.init(data); ^e{]WH?
for(int i=0;i h.remove(); zhgvqg-
System.arraycopy(h.queue,1,data,0,data.length); \OW.?1d
} {WvYb,
_lBHZJ+
private static class MaxHeap{ hlBMRx49
,}:}"cl
void init(int[] data){ *_sSM+S
this.queue=new int[data.length+1]; dlRTxb^Y>u
for(int i=0;i queue[++size]=data; .x'?&7#(
fixUp(size); -A^o5s
} jRN>^Ur;g
} f=IF_|@^S
):]5WHYg
private int size=0; vyvb-oz;u
~5>k_\G8
private int[] queue; D4O^5?F)|
)8`i%2i=
public int get() { -)Hc^'.
return queue[1]; {_R{gpj'
} Ei4Iv#Oi`
(_3QZ
public void remove() { UB,0c)
SortUtil.swap(queue,1,size--); gE9x+g
fixDown(1); m(w9s;<
} +Kp8X53
file://fixdown [4r<WvUaM
private void fixDown(int k) { sV;q(,oru
int j; GmH`ipi
while ((j = k << 1) <= size) { &fW'_,-
if (j < size %26amp;%26amp; queue[j] j++; 3vHkhhYQ
if (queue[k]>queue[j]) file://不用交换 M=54xTh0Y
break; nyL$z-I)
SortUtil.swap(queue,j,k); N$.=1Q$F6
k = j; _H"_&m$aDm
} meYGIP:n
} v,!`A!{D
private void fixUp(int k) { *G8Z[ht%r
while (k > 1) { R0urt
int j = k >> 1; Py\/p Fvg
if (queue[j]>queue[k]) 5fy{!
break; a$3]`
SortUtil.swap(queue,j,k); Z^c\M\`7
k = j; QIfP%,LT
} q)3QmA~
} T>|Y_3YO_a
OHv4Yy]$B
} %6la@i
u s8.nL/
} \olY)b[
Z>[n~{-,p
SortUtil： 0|kH0c,T-
8p#V4liE
package org.rut.util.algorithm; E.,
j8+>E?nm
import org.rut.util.algorithm.support.BubbleSort; KMx '(
import org.rut.util.algorithm.support.HeapSort; uNca@xl'
import org.rut.util.algorithm.support.ImprovedMergeSort; -^JPY)\R
import org.rut.util.algorithm.support.ImprovedQuickSort; A{Qo}F<*
import org.rut.util.algorithm.support.InsertSort; a-lF}P\
import org.rut.util.algorithm.support.MergeSort; kDG?/j90D
import org.rut.util.algorithm.support.QuickSort; /!sGO:
import org.rut.util.algorithm.support.SelectionSort; Ya}}a
import org.rut.util.algorithm.support.ShellSort; a@-bw4SD
T^ - -:1
/** ,<$rSvMfg
* @author treeroot IP^1ca#<
* @since 2006-2-2 5cb8=W-
* @version 1.0 b3ys"Vyn
*/ Z>~7|vl
public class SortUtil { :1;"{=Yx}
public final static int INSERT = 1; 6]mAtA`Y
public final static int BUBBLE = 2; Z= =c3~
public final static int SELECTION = 3; yZ)-=H
public final static int SHELL = 4; p^w_-(p
public final static int QUICK = 5; H`,t"I
public final static int IMPROVED_QUICK = 6; b#*"eZj
public final static int MERGE = 7; t]T't='
public final static int IMPROVED_MERGE = 8; K1w:JA6(
public final static int HEAP = 9; L) UCVm
2t?Vl%<
public static void sort(int[] data) { =7EkN% V:{
sort(data, IMPROVED_QUICK); )6%a9&~H
} `Ue5;<K-/
private static String[] name={ j Y(|z*|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]MC5 uKn
}; [#fz[U
zYM0?O8pJ~
private static Sort[] impl=new Sort[]{ -XnOj2
new InsertSort(), 4?]s%2U6
new BubbleSort(), -wVuM.n(Z
new SelectionSort(), eh8lPTKil
new ShellSort(), Lj/
new QuickSort(), (C.aQ)|T
new ImprovedQuickSort(), Fzt7@VNxc
new MergeSort(), Z*IW*f&0>1
new ImprovedMergeSort(), a`zHx3Yg
new HeapSort() %r&36d'
}; 39d$B'"<1
6n;? :./
public static String toString(int algorithm){ g1 =>u
return name[algorithm-1]; nW`] =
} ^V7)V)Z;0
|pBvy1e4)
public static void sort(int[] data, int algorithm) { P0RtS1A
impl[algorithm-1].sort(data); >Bu_NoM
} wxN&k$`a
S4rm K&
public static interface Sort { NN5G '|i
public void sort(int[] data); 0Hx'C^m72
} _:FD#5BZ1
)P,pW?h$
public static void swap(int[] data, int i, int j) { cM\BEhh
int temp = data; mex@~VK
data = data[j]; P.jy7:dB,
data[j] = temp; %/BBl$~ji
} WO6+r?0M2
} b;nqhO[f}