[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; iyr8*L\
} fO^s4gWTg
int i1=l; F0zaA
int i2=mid+1; FV aC8Kw
for(int cur=l;cur<=r;cur++){ d7QUg6=
if(i1==mid+1) ~]?EV?T
data[cur]=temp[i2++]; 0.nkh6?
else if(i2>r) i;]# @n|
data[cur]=temp[i1++]; 4MW oGV9
else if(temp[i1] data[cur]=temp[i1++]; jTV4iX
else ;pOV; q3j
data[cur]=temp[i2++]; "-MB U
} KU0Ad);e
} DcM/p8da
&0|Z FXPd
} kjdIk9 Y
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改进后的归并排序: &?5)Jis:
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package org.rut.util.algorithm.support; `nEqw/I
c~OPH 0,
import org.rut.util.algorithm.SortUtil; T@#?{eA
5A|dhw
/** N`fFYO
* @author treeroot kX}sDvP3
* @since 2006-2-2 S# baOO
* @version 1.0 J]S30&?
*/ @]2aPs} }6
public class ImprovedMergeSort implements SortUtil.Sort { ycOnPTh
!T ,=kh
private static final int THRESHOLD = 10; /%p ~
#^9k&t#!6
/* OQ 4h8,
* (non-Javadoc) `Eu,SvkFw
* Pw7uxN`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JgKhrDx
*/ 1|H4]!7kE
public void sort(int[] data) { d=uGB"
int[] temp=new int[data.length]; RIO?rt;
mergeSort(data,temp,0,data.length-1); @o'L!5Y
} %VR{<{3f
7w8UnPuM
private void mergeSort(int[] data, int[] temp, int l, int r) { n$7*L9)(C
int i, j, k; L,nb<
int mid = (l + r) / 2; \awkt!Wa
if (l == r) `jTB9A"
return; 8tna<Hx
if ((mid - l) >= THRESHOLD) ^P]5@dv
mergeSort(data, temp, l, mid); l`:u5\ rM
else 5ZH3}B^L$
insertSort(data, l, mid - l + 1); 3k(tv U+eC
if ((r - mid) > THRESHOLD) $9r4MMs{$
mergeSort(data, temp, mid + 1, r); QUvSeNSp
else )uR_d=B&
insertSort(data, mid + 1, r - mid); HJym|G>%?
~!g2+^G7+P
for (i = l; i <= mid; i++) { 6Uq;]@k%
temp = data; (3!6nQj-t
} ;~d$OM
for (j = 1; j <= r - mid; j++) { k\j_hu
temp[r - j + 1] = data[j + mid]; Sj|tR[SAoD
} 5/h-Hr
int a = temp[l]; G{>PYLxOb
int b = temp[r]; P?n4B \!
for (i = l, j = r, k = l; k <= r; k++) { OA&'T*)-A6
if (a < b) { Jq&Hz$L|
data[k] = temp[i++]; nD BWm`kN
a = temp; T(?w}i
} else { ]i.N'O<p
data[k] = temp[j--]; ?uSoJM`wa!
b = temp[j]; r{R<J?Y
} qhxMO[f
} *gwlW/%Fz
} GLtWo+g0
6U*CR=4
/** ^Qx?)(@
* @param data b_~XTWP$l
* @param l x*vD^1"'P
* @param i E,6|-V;?
*/ i|1*bZ6'
private void insertSort(int[] data, int start, int len) { c1k[)O~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T$D(Y`zdn
} -4Hb]#*2
} LsWD^JE.
} -n9&W
} ) 1AAL0F\B
Pb'(Y
堆排序： 1@L18%h
v-z%3x.f
package org.rut.util.algorithm.support; 4}m9,
l'(FM^8jv
import org.rut.util.algorithm.SortUtil; VEh9N
l%EvXdZuOy
/** bIiuna\
* @author treeroot $.Tn\4z&
* @since 2006-2-2 X+]>pA
* @version 1.0 &K0b3AWc
*/ HQP.7.w7 5
public class HeapSort implements SortUtil.Sort{ @G2# Z
Np+PUu>
/* (non-Javadoc) ]_h3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I0zx'x)F
*/ q|<B9Jk
public void sort(int[] data) { I*N"_uKU
MaxHeap h=new MaxHeap(); "HJ^>%ia
h.init(data); F^gTID
for(int i=0;i h.remove(); |;US)B8}*Z
System.arraycopy(h.queue,1,data,0,data.length); B$2b=\
} "M5
S#M8}+ZD,
private static class MaxHeap{ @[J6JT*E
ym{@w3"S
void init(int[] data){ <u\Hy0g
this.queue=new int[data.length+1]; [gBf1,bK
for(int i=0;i queue[++size]=data; veq3t$sj
fixUp(size); #<)[{+f[t
} `;}`>!8j
} /#Pm'i>B
ooJxE\L
private int size=0; IRQtA ZV$
67rY+u%
private int[] queue; v<v;ZR)
?IAu,s*u
public int get() { bpBn3f`?*
return queue[1]; ( 3B1X
} o)5zvnu7
73X*|g[O
public void remove() { ^rJTlh 9
SortUtil.swap(queue,1,size--); 8~O#@hB~3
fixDown(1); + -Rf@
} e^eJ!~0
file://fixdown v>LK+|U
private void fixDown(int k) { m[=SCH-;
int j; "~ID.G|<
while ((j = k << 1) <= size) { Q$U.vF7BnP
if (j < size %26amp;%26amp; queue[j] j++; Oz%6y ri
if (queue[k]>queue[j]) file://不用交换 o?}dHTk7
break; :(XyiF<Ud
SortUtil.swap(queue,j,k); D 1.59mHsD
k = j; =Lkn
} ~:JAWs$\V
} :? B4q#]N
private void fixUp(int k) { YA@?L!F
while (k > 1) { !f(A9V
int j = k >> 1; "}_J"%
if (queue[j]>queue[k]) T2rwK2
break; Kq")|9=d
SortUtil.swap(queue,j,k); PFpFqJ)Cs"
k = j; KOe]JDU
} K7C <}y
} \{<ml n
&PPnI(s^K
} 9)+!*(D
?x",VA
} >A D!)&c
^?fsJ
SortUtil： &c-V QP(
H 2I
package org.rut.util.algorithm; z#RwgSPw6
m>Wt'Cc
import org.rut.util.algorithm.support.BubbleSort; 4}D&=0IZ
import org.rut.util.algorithm.support.HeapSort; I`B ZZ-
import org.rut.util.algorithm.support.ImprovedMergeSort; GjEV]hqR
import org.rut.util.algorithm.support.ImprovedQuickSort; / P@P1l|I
import org.rut.util.algorithm.support.InsertSort; _K?v^oM#
import org.rut.util.algorithm.support.MergeSort; !+hw8@A
import org.rut.util.algorithm.support.QuickSort; h/aG."U
import org.rut.util.algorithm.support.SelectionSort; *Q [%r
import org.rut.util.algorithm.support.ShellSort; >0N$R|B&
9Z2aFW9
/** \ 511?ik
* @author treeroot JDpW7OrDc
* @since 2006-2-2 s?sr0HZ
* @version 1.0 `sdbo](76
*/ ;cv\v(0
public class SortUtil { -k,}LJjo
public final static int INSERT = 1; k~Y_%#_
public final static int BUBBLE = 2; ;M#D*<ucI:
public final static int SELECTION = 3; ac43d`wpK
public final static int SHELL = 4; @`sZV8
public final static int QUICK = 5; Qmv8T ^+
public final static int IMPROVED_QUICK = 6; [HRP&jr
public final static int MERGE = 7; r)w]~)8
public final static int IMPROVED_MERGE = 8; AIQ]lQ(
public final static int HEAP = 9; XKBQH(
scEE$:
public static void sort(int[] data) { pKL^<'w0
sort(data, IMPROVED_QUICK); b\"2O4K,)
} V,3$>4x
private static String[] name={ H?pWyc<,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _@]@&^K$E
}; 5r\Rfma
~o/e0
private static Sort[] impl=new Sort[]{ 0K^G>)l
new InsertSort(), (XA]k%45
new BubbleSort(), pdR&2fp
new SelectionSort(), gY@$g
new ShellSort(), <+7-^o_
new QuickSort(), A|GheH!t
new ImprovedQuickSort(), T$xY]hqr
new MergeSort(), }"9jCxXL
new ImprovedMergeSort(), e0u*\b
new HeapSort() !*|`-woE
}; Si%K|$?@
&AlX).
public static String toString(int algorithm){ c_bIadE{
return name[algorithm-1]; d\aU rsPn
} s@bo df&
(}n,Ou[
public static void sort(int[] data, int algorithm) { VFwp .1oa!
impl[algorithm-1].sort(data); > jvi7
} iY1JU-S
Cy##+u,C
public static interface Sort { b]U%|bp
public void sort(int[] data); lGr(GHn
} @RF!p
]`Y;4XR
public static void swap(int[] data, int i, int j) { +V6N/{^5
int temp = data; ,;yiV<AD
data = data[j]; }@:vq8%Q
data[j] = temp; @{!c [{x,T
} Ey!+rq}
} bR!*z