[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; MGQ,\55"
} +< yhcSSTB
int i1=l; Wwhgo.Wx
int i2=mid+1; G6V/SaD
for(int cur=l;cur<=r;cur++){ V.8%|-d
if(i1==mid+1) vM(Xip7
data[cur]=temp[i2++]; 3rNc1\a;
else if(i2>r) Yl~$V(
data[cur]=temp[i1++]; "]#'QuR
else if(temp[i1] data[cur]=temp[i1++]; ul@3 Bt
else I^G^J M!
data[cur]=temp[i2++]; h=6xZuA\
} F+ukAT
} Q_]~0PoH
Ux}W&K/?'
} |gv{z"
Efx=T$%^&
改进后的归并排序: 90fs:.
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package org.rut.util.algorithm.support; KQ{Lt?S
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import org.rut.util.algorithm.SortUtil; uE`r/=4
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/** Qdu$Os
* @author treeroot |9IC/C!HC
* @since 2006-2-2 )3%@9
* @version 1.0 ^H3m\!h
*/ 'wvMH;}u
public class ImprovedMergeSort implements SortUtil.Sort { ;7Okyj6EP
uw33:G
private static final int THRESHOLD = 10; t'g^W
;iU%Kt
/* JoJukoy}F
* (non-Javadoc) g1{/ 5{XI
* XA{F:%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m5*[t7@%
*/ :Fe_,[FR
public void sort(int[] data) { =K(JqSw+M
int[] temp=new int[data.length]; fx)KNm8Lx
mergeSort(data,temp,0,data.length-1); I\zemW!
} E^wyD-ii/
S!hXf|*0[
private void mergeSort(int[] data, int[] temp, int l, int r) { zkexei4^<
int i, j, k; kRlA4h1u_$
int mid = (l + r) / 2; {kL&Rv%'
if (l == r) g^l RG3a
return; Ur!~<4GO
if ((mid - l) >= THRESHOLD) eT[&L @l]b
mergeSort(data, temp, l, mid); %>zjGF<
else m Ni2b*k
insertSort(data, l, mid - l + 1); 2*2:-ocl$
if ((r - mid) > THRESHOLD) z%sy$^v@vD
mergeSort(data, temp, mid + 1, r); I[D8""U
else BzN@gQo
insertSort(data, mid + 1, r - mid); |^( M{
,T|x)"uA`
for (i = l; i <= mid; i++) { U~H?4Izl=
temp = data; cWa)#:JOV
} U>F{?PReA?
for (j = 1; j <= r - mid; j++) { cyQBqG
temp[r - j + 1] = data[j + mid]; H}ZQ?uK;
} |V|+lx'sc
int a = temp[l]; %3o`j<
int b = temp[r]; =&vFVIhWcf
for (i = l, j = r, k = l; k <= r; k++) { q \O Ou
if (a < b) { !SxG(*u
data[k] = temp[i++]; & mt)d
a = temp; O0huqF$K
} else { iw\%h9
data[k] = temp[j--]; tFM$#JN
b = temp[j]; 57Z-
} h`Tz5% n
} L/Vx~r`P
} vH[Pb#f-
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/** 42+#<U7T
* @param data )9L/sKz
* @param l 2k5/SV X
* @param i $yu?.b 9H#
*/ ub K7B |p
private void insertSort(int[] data, int start, int len) { rv7{Ow_Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [L(hG a
} nxo+?:**
} yI3kvh
} BRv x[u
} T .n4TmF
1^G{tlA-
堆排序： ,[!LCXp
DjLL|jF
package org.rut.util.algorithm.support; L,LNv
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import org.rut.util.algorithm.SortUtil; W?Ww2Lo%Y
>:1P/U
/** RU#F8O
* @author treeroot 1/Zh^foG
* @since 2006-2-2 ,wAz^cK|
* @version 1.0 $}o b,i^W
*/ tTanW2C
public class HeapSort implements SortUtil.Sort{ 'LSz f/w
& ,hr8
/* (non-Javadoc) 7cTk@Gq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D Ml?o:l
*/ >m6&bfy\q
public void sort(int[] data) { y 1\'(1
MaxHeap h=new MaxHeap(); & E}mX]t
h.init(data); z=Cr7-
for(int i=0;i h.remove(); mUoIJ3fv_,
System.arraycopy(h.queue,1,data,0,data.length); 5:.{oSy7n
} =O$M_1lp
kG0Yh2;#
private static class MaxHeap{ kg97S
:iF%cy.
void init(int[] data){ gm)@c2?.
this.queue=new int[data.length+1]; G}nO@
for(int i=0;i queue[++size]=data; t18$x"\4k
fixUp(size); `3_lI~=eH
} CH#k(sy
} f 2YLk
bBc-^
private int size=0; ]9 w76Z
$ &UZy|9
private int[] queue; z@ 35NZn
[<c&|tfl
public int get() { ci9R.U)
return queue[1]; L=; -x9
} ??&<k
rNDrp@A>
public void remove() { ~@W*r5/
SortUtil.swap(queue,1,size--); Kg\R+i@#<
fixDown(1); K }$&:nao
} 3L5r*fa
file://fixdown U9hS<}<Ki
private void fixDown(int k) { OQ&'Dti
int j; RP4Ku9hk
while ((j = k << 1) <= size) { eD?3"!c!
if (j < size %26amp;%26amp; queue[j] j++; j]rz]k
if (queue[k]>queue[j]) file://不用交换 uBrMk
break; DGESba\2+
SortUtil.swap(queue,j,k); ;q>9W,jy
k = j; zCaT tb|@
} XzIx:J6
} w?Ju5 5
private void fixUp(int k) { R9+jW'[K
while (k > 1) { V9NTs8LKc
int j = k >> 1; k?GD/$1t
if (queue[j]>queue[k]) iA }vKQ
break; 5s{j=.O
SortUtil.swap(queue,j,k); ;]2s,za)qs
k = j; SkQswH
} EbNd=Z'J
} Dh4 6o|P
8 .>/6M
} l`9t}
0#o/^Ah
} k(VB+k"3
,5 j"ruZ
SortUtil： B=f,QU
~Ou1WnmO
package org.rut.util.algorithm; ,MPB/j^o5!
Gbpw5n;e
import org.rut.util.algorithm.support.BubbleSort; rZXrT}Xh{W
import org.rut.util.algorithm.support.HeapSort; 2S[-$9
import org.rut.util.algorithm.support.ImprovedMergeSort; 5Qwh(C^H
import org.rut.util.algorithm.support.ImprovedQuickSort; xgu `Q`~
import org.rut.util.algorithm.support.InsertSort; cf_|nL#9
import org.rut.util.algorithm.support.MergeSort; x3+oAb@o/
import org.rut.util.algorithm.support.QuickSort; I?#85l{>
import org.rut.util.algorithm.support.SelectionSort; 9p* gU[
import org.rut.util.algorithm.support.ShellSort; HvwYm.$zE
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/** K6JVg$
* @author treeroot n{0Ld -zH
* @since 2006-2-2 CK+d!Eg
* @version 1.0 K kW;-{c
*/ -7H^n#]
public class SortUtil { EI>l-N2
public final static int INSERT = 1; #FOqP!p.E
public final static int BUBBLE = 2; Cs3^9m6;d
public final static int SELECTION = 3; y;cUl, :v
public final static int SHELL = 4; zdl%iop3e
public final static int QUICK = 5; = {'pUU
public final static int IMPROVED_QUICK = 6; 3\O|ii
public final static int MERGE = 7; hOv={:
public final static int IMPROVED_MERGE = 8; rHge~nY<
public final static int HEAP = 9; J@pb[OL,
(:V>Hjt
public static void sort(int[] data) { +ECDD'^!
sort(data, IMPROVED_QUICK); _Q%vK*n
} ^g1f X1
private static String[] name={ S{]7C?4`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0-Y:v(|.
}; Jq.lT(E8D
O=cxNy-I
private static Sort[] impl=new Sort[]{ u6V/JI}g
new InsertSort(), s'aip5P
new BubbleSort(), wFh8?Z3u_
new SelectionSort(), [D"t~QMr
new ShellSort(), Y}*\[}l:&x
new QuickSort(), 'nQVj
new ImprovedQuickSort(), 7tM9u5FF
new MergeSort(), sZWaV4
new ImprovedMergeSort(), g>0XxjP4
new HeapSort() B$3 ?K
}; tY${M^^<J
8(g:HR*;
public static String toString(int algorithm){ qLL,F
return name[algorithm-1]; [H\:pP8t
} 54;J8XT7
WL,&-*JAW
public static void sort(int[] data, int algorithm) { rB~W Iu
impl[algorithm-1].sort(data); >KLtY|o)
} AUVgPXOwd
qW:)!z3\
public static interface Sort { G|w=ez
public void sort(int[] data); up3O|lj4
} -4rDbDsr
kd:$oS_*s
public static void swap(int[] data, int i, int j) { 1be %G [*
int temp = data; 1axQ)},o@p
data = data[j]; Ab%;Z5$fr
data[j] = temp; EFuvp8^y
} W!blAkM%i
} mME4 l