[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; u*:;O\6l
} 13lJq:bM
int i1=l; :v(fgS2\
int i2=mid+1; [og_0;
for(int cur=l;cur<=r;cur++){ SZ*Nr=X
if(i1==mid+1) 4XCy>;4u
data[cur]=temp[i2++]; VEtdp*ot
else if(i2>r) ov@N13 ,$
data[cur]=temp[i1++]; ar#Xe;T!
else if(temp[i1] data[cur]=temp[i1++]; 42If/N?
else 2X@|H
data[cur]=temp[i2++]; hh$V[/iK
} th 9I]g^=t
} ux 7^PTgcO
8=!BtMd"
} #$ Q2ijT0
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改进后的归并排序: Go8?8*
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package org.rut.util.algorithm.support; UF$JVb
];n3H~2
import org.rut.util.algorithm.SortUtil; a#_=c>h;
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/** 9|}u"jJB%E
* @author treeroot Z%t"~r0PS
* @since 2006-2-2 tzKIi_2
* @version 1.0 M yvyp
*/ Ns*&;x9
public class ImprovedMergeSort implements SortUtil.Sort { t[yu3U
8pEiU/V
private static final int THRESHOLD = 10; ioZ{2kK
n&j@7R
/* x bsk
* (non-Javadoc) @Ft\~ +}
* n*Q~<`T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =gYKAr^p5
*/ C(Bh<c0@
public void sort(int[] data) { n&4 4Acs[
int[] temp=new int[data.length]; 7tEkQZMDI
mergeSort(data,temp,0,data.length-1); -F+ )N$CW
} 2^\67@9
ZYi."^l
private void mergeSort(int[] data, int[] temp, int l, int r) { M$O*@])
int i, j, k; M`~UH\
int mid = (l + r) / 2; ?aMV{H*Q*
if (l == r) "Q>gQKgL
return; Uzx,aYo X
if ((mid - l) >= THRESHOLD) \m\E*c ):
mergeSort(data, temp, l, mid); ? _>L<Y
else VN5UJ!$?J
insertSort(data, l, mid - l + 1); 3)bC,
if ((r - mid) > THRESHOLD) ^E)*i#."4
mergeSort(data, temp, mid + 1, r); gHB*u!w7Z
else YEg(QOn3Q
insertSort(data, mid + 1, r - mid); K]
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for (i = l; i <= mid; i++) { ;AjY-w
temp = data; !P_8D*^9
} tz).]E D
for (j = 1; j <= r - mid; j++) { x+=Ko
temp[r - j + 1] = data[j + mid]; n[mVwQ(%
} ixf~3Y8
int a = temp[l]; \$iU#Z
int b = temp[r]; "IjCuR;#
for (i = l, j = r, k = l; k <= r; k++) { .w.jT"uD!
if (a < b) { YEbB3N
data[k] = temp[i++]; MHm=X8eg
a = temp; vz[-8m:f
} else { Tx+Bkfj
data[k] = temp[j--]; swfcA\7R
b = temp[j]; 3p%B
} lU}y%J@
} m,u5S=3A{!
} \h#,qTE
dv_& ei
/** "\n,vNk
* @param data n)n>|w_
* @param l ib3u:
* @param i BkH- d z
*/ YV6@SXy
private void insertSort(int[] data, int start, int len) { x=/`W^t2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @AvDV$F
} %y{f]m
} wU9H=w^
} AB.gVw| 4
} 2i~tzo
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堆排序： nO^m
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package org.rut.util.algorithm.support; wfecM(
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import org.rut.util.algorithm.SortUtil; )YKnFSm
9i&(VzY[=
/** fku\O<1
* @author treeroot j[^(<R8
* @since 2006-2-2 d>RoH]K4
* @version 1.0 !zu YO3:
*/ ,t2yw
public class HeapSort implements SortUtil.Sort{ go6XUe
c7E|GZ2Hc
/* (non-Javadoc) pd3=^Zi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #[Z1W8e
*/ \~LwlOo%R
public void sort(int[] data) { jo7`DDb
MaxHeap h=new MaxHeap(); 8|Q=9mmWOh
h.init(data); e%Sw(=a
for(int i=0;i h.remove(); oCCTRLb02
System.arraycopy(h.queue,1,data,0,data.length); gB&8TE~Y
} sDylSYq
4TPAD)C
private static class MaxHeap{ i gyTvt!
w,6zbI/
void init(int[] data){ NSsLuM=.
this.queue=new int[data.length+1]; g`2DJi&)
for(int i=0;i queue[++size]=data; K;,_P5J%
fixUp(size); a/k0(
} tK|jh
} by:"aDGK.
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private int size=0; $jc&Tk#
DCv=*=6w
private int[] queue; 2 SJN;A~}
SY[7<BUZ
public int get() { -msfiO
return queue[1]; k3 YDnMRA9
} (=T%eJ61
P2j"L#%
public void remove() { ,?3)L
SortUtil.swap(queue,1,size--); y<h~jz#hkq
fixDown(1); ib-)T7V`
} K[.*8
file://fixdown 1-h"1UN2E
private void fixDown(int k) { q JdC5z\[
int j; N084k}io
while ((j = k << 1) <= size) { _#SCjFz
if (j < size %26amp;%26amp; queue[j] j++; ~ ~"qT
if (queue[k]>queue[j]) file://不用交换 k|r+/gIV
break; J%:D%=9 )
SortUtil.swap(queue,j,k); LdPA`oI3j
k = j; " iz'x-wy
} Im<i.a <`
} 'Avp16zg
private void fixUp(int k) { "u H VX|`
while (k > 1) { &>YdX$8x
int j = k >> 1; .#4;em%7
if (queue[j]>queue[k]) q[wVC h
break; kdam]L:9
SortUtil.swap(queue,j,k); _wY<8 F*
k = j; S,*
} g]ct6-m
} ZQVr]/W^r
}OJ,<!v2pc
} |)4aIa
}(yX$ 3?`
} vhEXtjL
HgY>M`U
SortUtil： v5/2-<6x
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package org.rut.util.algorithm; KiaQ^[/q
"UVqHW1%K
import org.rut.util.algorithm.support.BubbleSort; *oW^P~m/
import org.rut.util.algorithm.support.HeapSort; hE9UWa.Q>
import org.rut.util.algorithm.support.ImprovedMergeSort; #\{j/{VZ
import org.rut.util.algorithm.support.ImprovedQuickSort; ^T.icSxP
import org.rut.util.algorithm.support.InsertSort; T+q3]&
import org.rut.util.algorithm.support.MergeSort; }[2|86,G;
import org.rut.util.algorithm.support.QuickSort; p_Yx"nO7
import org.rut.util.algorithm.support.SelectionSort; S+LS!b
import org.rut.util.algorithm.support.ShellSort; %"C%pA
9?6]Zag
/** T 8. to
* @author treeroot < 9 vS
* @since 2006-2-2 gWK NC
* @version 1.0 4b}94e@(N
*/ zg[.Pws:E
public class SortUtil { +Y9n@`
public final static int INSERT = 1; ?!{nNJ
public final static int BUBBLE = 2; h=7eOK]
public final static int SELECTION = 3; #n5DK{e
public final static int SHELL = 4; E979qKl
public final static int QUICK = 5; "AayU
public final static int IMPROVED_QUICK = 6; <:YD.zAh|
public final static int MERGE = 7; G#f(oGn :
public final static int IMPROVED_MERGE = 8; fN-y8
public final static int HEAP = 9; q]}1/JZS
aP}%&{iC*
public static void sort(int[] data) { 2\'5LL3
sort(data, IMPROVED_QUICK); 9si,z
} $1ZFkw
private static String[] name={ b- FJMY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q@6Je(H
}; J_tI]?jrU
&58TX[#
private static Sort[] impl=new Sort[]{ a+_F^
new InsertSort(), E{#Y=
new BubbleSort(), n@e[5f9?x
new SelectionSort(), f|cF[&wo
new ShellSort(), Do\YPo_Mr
new QuickSort(), 6j{O/
new ImprovedQuickSort(), Ze:Y"49S+>
new MergeSort(), 6Y-sc*5
new ImprovedMergeSort(), 6z2_b wo
new HeapSort() |#rP~Nj)
}; +P//p$pE
{zj<nu
public static String toString(int algorithm){ xn`<g|"#
return name[algorithm-1]; KDW=x4*p
} J@4,@+X
8g!C'5
public static void sort(int[] data, int algorithm) { xSal=a;k
impl[algorithm-1].sort(data); H{4/~Z
} G1`H H&
3?"JFfYU,'
public static interface Sort { )^ky @V
public void sort(int[] data); D}| 30s?u1
} q|[P[7z
b)eKa40Z
public static void swap(int[] data, int i, int j) { J:c]z9&!
int temp = data; .$k2.-k
data = data[j]; VgSk\:t
data[j] = temp; !/},k"p6
} zz4.gkU
} xTJ-v/t3<