[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; i?M-~EKu
} KFO K%vbM
int i1=l; %>9L}OAm
int i2=mid+1; "62g!e}!c
for(int cur=l;cur<=r;cur++){ GT]>
if(i1==mid+1) _6h.<BR
data[cur]=temp[i2++]; *My9r.F5o
else if(i2>r) V3cKdlu Na
data[cur]=temp[i1++]; G}l9 [lE
else if(temp[i1] data[cur]=temp[i1++]; (n>Gi;u(R
else $,/E"G`
data[cur]=temp[i2++]; (2Lmu[
} =8*ru\L:hr
} z?Z"*z
ackeq#
} ]ke9ipj]:
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改进后的归并排序: x;bA\b
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package org.rut.util.algorithm.support; v%2Dz
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import org.rut.util.algorithm.SortUtil; w[3a^
yO@1#
/** H$WD7/?j
* @author treeroot ^`SEmYb;
* @since 2006-2-2 wM7Iu86
* @version 1.0 LdOme[C1
*/ M"p%CbcI]
public class ImprovedMergeSort implements SortUtil.Sort { Ev3'EA~`
,aS+RJNM
private static final int THRESHOLD = 10; {4/*2IRN9h
kjsj~jwvv
/* 9__Q-J
* (non-Javadoc) #m<uG5l`
* VrfEa d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) acUyz2x
*/ c1FSQ m81
public void sort(int[] data) { _s0)Dl6K
int[] temp=new int[data.length]; ~J~R.r/
mergeSort(data,temp,0,data.length-1); b~*iL!<
} ) ] Ro
nr&|
private void mergeSort(int[] data, int[] temp, int l, int r) { K+M\E[1W
int i, j, k; %WR"qd&HSh
int mid = (l + r) / 2; KTmwkZcfYD
if (l == r) f9Xa}*
return; .9z}S=ZK
if ((mid - l) >= THRESHOLD) F|!=]A<
mergeSort(data, temp, l, mid); 2g5 4<G*e
else ALO/{:l(
insertSort(data, l, mid - l + 1); Ho(}_Q&
if ((r - mid) > THRESHOLD) }#E]efjs
mergeSort(data, temp, mid + 1, r); Z<AZO ^
else d { P$}b
insertSort(data, mid + 1, r - mid); NW;_4g4qE
' i5}`\
for (i = l; i <= mid; i++) { jp~Tlomp
temp = data; GJE+sqMX1
} {hf_Xro&
for (j = 1; j <= r - mid; j++) { W;!V_-:
temp[r - j + 1] = data[j + mid]; L">jSZW[[
} /5epDDP-t5
int a = temp[l]; I(&N2L$-
int b = temp[r]; 99'c\[fd'
for (i = l, j = r, k = l; k <= r; k++) { T\4>4eX-
if (a < b) { ~^'t70 :D
data[k] = temp[i++]; ';.y`{/
a = temp; yD!GgnW
} else { zd$iDi($
data[k] = temp[j--]; x+%> 2qgj"
b = temp[j]; 4T$jY}U
} #^|2PFh5
} 4~oRcO8!Y
} vF@|cTRR)
As^eL/m2L
/** $5\sV48f
* @param data L9,GUtK{
* @param l Lq6nmjL
* @param i l`X?C~JhJ
*/ ^aJ]|*m
private void insertSort(int[] data, int start, int len) { :]8A;`G}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `W1TqA
} OQg}E@LZ
} YReI|{O$c
} w_QWTD0
} ,PKUgL}w
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堆排序： C\{hN
D6yE/QeK4
package org.rut.util.algorithm.support; (otD4VR_
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import org.rut.util.algorithm.SortUtil; mL;oR4{
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/** A~0yMww:$
* @author treeroot .ubZ
* @since 2006-2-2 y<v-,b*
* @version 1.0 28}L.>5k
*/ 7fT_]H8
public class HeapSort implements SortUtil.Sort{ &wkbr2P
_a`/{M|
/* (non-Javadoc) }^n"t>Z8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jEP'jib%
*/ /;}o0 DYeW
public void sort(int[] data) { M4d4b
MaxHeap h=new MaxHeap(); CzDg?wb
h.init(data); cvtn,Ml6
for(int i=0;i h.remove(); @lh]?|*[
System.arraycopy(h.queue,1,data,0,data.length); i~4$V
} (ze9-!%
K)n058PO
private static class MaxHeap{ Ogh,
+J42pSxzoo
void init(int[] data){ `'bu8JK
this.queue=new int[data.length+1]; ue!4By8T
for(int i=0;i queue[++size]=data; 1wggYX
fixUp(size); n2'XWbMaL
} bK!uR&i^l
} 2,h]Y=.s
u+pZ<Bb
private int size=0; m'ZxmsFo
ehMpo BL
private int[] queue; 4/2@^\?i)
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public int get() { j4#S/:Q<7
return queue[1]; yOk]RB<'r
} ]<_v;Q<t
+' .o
public void remove() { {Sc*AE&Y
SortUtil.swap(queue,1,size--); uxW<Eh4H*
fixDown(1); Vg"vC
} ,A0v 5Q<
file://fixdown }[;r-5}
private void fixDown(int k) { WBD"d<>'
int j; >IZ$ .-
while ((j = k << 1) <= size) { `n`HwDo;i
if (j < size %26amp;%26amp; queue[j] j++; ,!^;<UR:
if (queue[k]>queue[j]) file://不用交换 NV2$ >D
break; OuPfB
SortUtil.swap(queue,j,k); 5N2`e3:I
k = j; M^/ZpKeT"
} 5^2P\y(?
} Z =*h9,MY
private void fixUp(int k) { J$yJ2G
while (k > 1) { ?y~"\iP
int j = k >> 1; `;s#/`c|/
if (queue[j]>queue[k]) RAxp2uif
break; J@4 Z+l9
SortUtil.swap(queue,j,k); =MmAnjo
k = j; jhka;m
} FaG&U
} Tx$bg(
,@8*c0Y~<!
} W)odaab7
YE-}1&8
} ~=$d>ZNQ
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SortUtil： O F?o
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package org.rut.util.algorithm; .H86f !=
A] f^9F@
import org.rut.util.algorithm.support.BubbleSort; hx}X=7w
import org.rut.util.algorithm.support.HeapSort; ,#(k|Zztc
import org.rut.util.algorithm.support.ImprovedMergeSort; Tnnj8I1v
import org.rut.util.algorithm.support.ImprovedQuickSort; 6[a;83
import org.rut.util.algorithm.support.InsertSort; {"*gX&;~
import org.rut.util.algorithm.support.MergeSort; F||oSJrI
import org.rut.util.algorithm.support.QuickSort; A4TW`g_zm
import org.rut.util.algorithm.support.SelectionSort; s)kr=zdyo
import org.rut.util.algorithm.support.ShellSort; N >];xb>
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/** ,mE}#cyY
* @author treeroot D[K!xq
* @since 2006-2-2 edfb7prfTl
* @version 1.0 mfgUf
*/ lnrs4s Km
public class SortUtil { =n_>7@9l
public final static int INSERT = 1; +!-U+W
public final static int BUBBLE = 2; !<5Wi)*
public final static int SELECTION = 3; 4 :M}Vz-
public final static int SHELL = 4; p3cb_
public final static int QUICK = 5; ]P4?jKI
public final static int IMPROVED_QUICK = 6; 2-@z-XKn
public final static int MERGE = 7; F@-8J?Hl:
public final static int IMPROVED_MERGE = 8; 4{ED~w|
public final static int HEAP = 9; .oe\wJS6
2<uBC
public static void sort(int[] data) { 8qv>C)~~`
sort(data, IMPROVED_QUICK); |I=GI]I
} 7n'Ww=ttI
private static String[] name={ ,y[w`Q\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )JA^FQ5N
}; xbZR/!?
6oq/\D$6~
private static Sort[] impl=new Sort[]{ >u?a#5R:m
new InsertSort(), b}m@2DR'|m
new BubbleSort(), f/^T:F6
new SelectionSort(), ,egbU(:l
new ShellSort(), ~PedR=Y0n
new QuickSort(), i$XT Qr0K=
new ImprovedQuickSort(), _#6*C%ax
new MergeSort(), 6'1Lu1w
new ImprovedMergeSort(), ^J&}C
new HeapSort() Ev1gzHd!i
}; mS &^xWPV
8}|!p>
public static String toString(int algorithm){ l }]"X@&G
return name[algorithm-1]; [}?E,1Q3
} Lz`_&&6
~Z$Ro/;l
public static void sort(int[] data, int algorithm) { E.^F:$2
impl[algorithm-1].sort(data); *XluVochrb
} NV;T*I8O
A=BT2j'l)
public static interface Sort { z_nY>_L83*
public void sort(int[] data); IMHt#M`
} X/A(8rvCr
dY.NQ1@"
public static void swap(int[] data, int i, int j) { mZL0<vU@^
int temp = data; lQ?_1H~4=
data = data[j]; \S)cVp)h
data[j] = temp; (Cbm*VL
} \m~Oaf;$
} <d$t*vnq