[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; >-*rtiE
} 7l/.fSW
int i1=l; 7/&i'y
int i2=mid+1; 3LN+gXmU
for(int cur=l;cur<=r;cur++){ @tGju\E"o
if(i1==mid+1) 7jL+c~
data[cur]=temp[i2++]; ePv3M&\J
else if(i2>r) WXV(R,*Tc
data[cur]=temp[i1++]; WK)hj{k
else if(temp[i1] data[cur]=temp[i1++]; PV$)k>H-
else 't.IYBHx
data[cur]=temp[i2++]; n?!XNXb
} S81%iz.n
} BZ*',\o
2FU+o\1%
} [% \>FT[
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改进后的归并排序: ABb,]%
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package org.rut.util.algorithm.support; b+Vfi9<
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import org.rut.util.algorithm.SortUtil; 2[ = =
<:/Lap#D^
/** &W+lwEu
* @author treeroot ;)$bhNFHx
* @since 2006-2-2 o&0fvCpW
* @version 1.0 ;-sZaU;
*/ FjR/_GPo6
public class ImprovedMergeSort implements SortUtil.Sort { E6JfSH#
!IF]P#
private static final int THRESHOLD = 10; =1sGT;>
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/* '5V}Z3zJ/
* (non-Javadoc) ?1w{lz(P
* \kWL:uU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iMjoatt
*/ (+uM |a
public void sort(int[] data) { PkX4 !
int[] temp=new int[data.length]; |ecK~+
mergeSort(data,temp,0,data.length-1); JYbsta
} ,Ei!\U^)
epN>;e z
private void mergeSort(int[] data, int[] temp, int l, int r) { !iv6k~.e'2
int i, j, k; _|+}4 ap
int mid = (l + r) / 2; /JsA[}.6
if (l == r) kZ<0|b
return; yX9 .yq
if ((mid - l) >= THRESHOLD) E{s p
mergeSort(data, temp, l, mid); $ix:S$
else &pHSX
insertSort(data, l, mid - l + 1); qlSI|@CO
if ((r - mid) > THRESHOLD) =jv3O.zq
mergeSort(data, temp, mid + 1, r); #dA9v7
else !]f80z
insertSort(data, mid + 1, r - mid); 7[=\bL
HQ /D)D
for (i = l; i <= mid; i++) { h4p<n&)F
temp = data; '3<T~t
} )j,Y(V$P
for (j = 1; j <= r - mid; j++) { Fi+8|/5
temp[r - j + 1] = data[j + mid]; ^AhV1rBB
} ~:FF"T>
int a = temp[l]; xVxN @[
int b = temp[r]; #qLsAw--Q
for (i = l, j = r, k = l; k <= r; k++) { mrmm@?
if (a < b) { ^_\S)P2c
data[k] = temp[i++]; \-Vja{J]
a = temp; H(?)v.%
} else { CP0;<}k
data[k] = temp[j--]; [nc-~T+Mo
b = temp[j]; ca=sc[ $+
} sqXwDy+.
} i%@blz:_Y
} 8c`EB-y
|$|B0mj
/** Es<& 6
* @param data ;*%3J$T+
* @param l ,J6t 1V
* @param i srlxp_^
*/ >Nam@,hm
private void insertSort(int[] data, int start, int len) { ZLDO&}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "DO|B=EejP
} |N5r_V
} Bnp\G h
} UuS6y9@v
} dNu?O>=
joz0D!-"#
堆排序： 2dsXG$-W2
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package org.rut.util.algorithm.support; ^[x6p}$
Ab #}BHI
import org.rut.util.algorithm.SortUtil; S>Z07d6&
g^l~AR
/** E3hXs6P
* @author treeroot o75l&`
* @since 2006-2-2 _V`F_C\\#
* @version 1.0 HPMj+xH
*/ Ec9%RAxl
public class HeapSort implements SortUtil.Sort{ t:x"]K
C/?x`2'
/* (non-Javadoc) j>8S,b=%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GIb,y,PDB
*/ ARUzEo gcf
public void sort(int[] data) { e0<Wed
MaxHeap h=new MaxHeap(); u>ZH-nw O
h.init(data); FMX^k
for(int i=0;i h.remove(); y(ceEV
System.arraycopy(h.queue,1,data,0,data.length); 23d*;ri5
} redMlHM
Sx:JuK@
private static class MaxHeap{ 0fGt7 "Q
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void init(int[] data){ d>gQgQ;g
this.queue=new int[data.length+1]; r>#4Sr
for(int i=0;i queue[++size]=data; frokl5L@
fixUp(size); IG.!M@_
} HTLS$o;Q
} 0"}=A,o(w
D&o~4Qvc]
private int size=0; J#IVu?B
DHg)]FQ/
private int[] queue; Or#KF6+ut
Avww@$
public int get() { {SF'YbY
return queue[1]; wP7 E8'
} =pZ$oTR
X2|&\G9c
public void remove() { (A )f r4
SortUtil.swap(queue,1,size--); tdHeZv
fixDown(1); iCJXV'
} 5dX /<
file://fixdown 8d?%9# p-)
private void fixDown(int k) { [Kg3:]2A
int j; URbHVPCPb
while ((j = k << 1) <= size) { -FF#+Z$
if (j < size %26amp;%26amp; queue[j] j++; Yl&bv#[z
if (queue[k]>queue[j]) file://不用交换 m*wDJEKo
break; ce3``W/H3
SortUtil.swap(queue,j,k); ]eUD3WUe>q
k = j; 4T6: C?V
} 0GW69 z
} 5yyc0UG
private void fixUp(int k) { EQe$~}[
while (k > 1) { SdF+b+P]
int j = k >> 1; :-_"[:t 5Z
if (queue[j]>queue[k]) -_xTs(;|8
break; ]SAGh|+xl
SortUtil.swap(queue,j,k); Q4Nut
k = j; !LQzf(s;
} Ei<m/v
} l,6' S8=
1pK(tm
} Q/@ pcU
d/3bE*gr
} n/Dg)n?
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SortUtil： PMi.)%++
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package org.rut.util.algorithm; i=R%MH+
K8/jfm
import org.rut.util.algorithm.support.BubbleSort; E9b>wP
import org.rut.util.algorithm.support.HeapSort; 1+"d-`'Z2O
import org.rut.util.algorithm.support.ImprovedMergeSort; qpQiMiB#g'
import org.rut.util.algorithm.support.ImprovedQuickSort; 9K;g\? 3
import org.rut.util.algorithm.support.InsertSort; F~0iJnF
import org.rut.util.algorithm.support.MergeSort; M6ZXq6J
import org.rut.util.algorithm.support.QuickSort; >;]S+^dXY
import org.rut.util.algorithm.support.SelectionSort; 0nvT}[\H*
import org.rut.util.algorithm.support.ShellSort; '0^lMQMg
1g,Ofr
/** B}P!WRNmln
* @author treeroot 1Vkb}A,'
* @since 2006-2-2 7|"l/s9,
* @version 1.0 Y3#8]Z_"}O
*/ W9{i~.zo
public class SortUtil { qu.AJ*
public final static int INSERT = 1; IAWs}xIly
public final static int BUBBLE = 2; k&M~yb
public final static int SELECTION = 3; XI:+EeM?
public final static int SHELL = 4; JC`;hY
public final static int QUICK = 5; 2I3H?Lrx!m
public final static int IMPROVED_QUICK = 6; s1R#X~d
public final static int MERGE = 7; 39m8iI%w[
public final static int IMPROVED_MERGE = 8; vTo+jQs^
public final static int HEAP = 9; qo}yEl1
S(Z\h_m(
public static void sort(int[] data) { WL|71?@C
sort(data, IMPROVED_QUICK); :`K2?;DC8
} NiEz3ODSi
private static String[] name={ Xq_hC"s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2s=zT5
}; Q@|"xKa
>sdF:(JV&
private static Sort[] impl=new Sort[]{ #S]O|$&*
new InsertSort(), *%\Xw*\0
new BubbleSort(), W6`_lGTj
new SelectionSort(), A~v[6*~>
new ShellSort(), &G[W$2`@
new QuickSort(), f'MRC \
new ImprovedQuickSort(), qJJ 5o?'
new MergeSort(), fT{jD_Q+3
new ImprovedMergeSort(), ^Y!$WP
new HeapSort() H]*B5Jv~
}; oGyoU#z#
}8ESp3~e_
public static String toString(int algorithm){ 9=FH2|Z
return name[algorithm-1]; Q-A_8
} iaQfxQP1w%
EiP N44(
public static void sort(int[] data, int algorithm) { C8i4z
impl[algorithm-1].sort(data); \),zDO+
} V)4?y9xZv
\ KsKb0sM
public static interface Sort { eA3NyL
public void sort(int[] data); l: kW|
} GY5JPl
xOr"3;^
public static void swap(int[] data, int i, int j) { O>I%O^
int temp = data; +3M1^:
data = data[j]; ?v-!`J>EF#
data[j] = temp; 1FG"Ak}D
} $C,`^n'
} PN=5ICT