[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; 'ym Mu}q
} \*5z0A9)5)
int i1=l; tHqa%
int i2=mid+1; n2o)K;wW+
for(int cur=l;cur<=r;cur++){ `+."X1
if(i1==mid+1) @@3NSKA
data[cur]=temp[i2++]; kN*I_#
else if(i2>r) Z1$S(p=)L
data[cur]=temp[i1++]; sOz {spA
else if(temp[i1] data[cur]=temp[i1++]; ?W dY{;&
else (3K,f4S@
data[cur]=temp[i2++]; o=![+g
} xA;)02
} hw`pi6
ME>Sh~C\
} wKcuIc$
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改进后的归并排序: $<VH~Q<
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package org.rut.util.algorithm.support; ifWQwS/,a
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import org.rut.util.algorithm.SortUtil; 4K~>
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/** D{6BX-Dw.
* @author treeroot @}r s6 G
* @since 2006-2-2 .2|(!a9W
* @version 1.0 FBrh!vQ<
*/ =yRv*C
public class ImprovedMergeSort implements SortUtil.Sort { 0e:j=kd)NH
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private static final int THRESHOLD = 10; 00>knCe6
all2?neK
/* 5|}u25J
* (non-Javadoc) b!/-9{
* GAs.?JHd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @eESKg(,
*/ 2H] 7=j
public void sort(int[] data) { /nh3/[u
int[] temp=new int[data.length]; oBnes*
mergeSort(data,temp,0,data.length-1); wSZMHIW
} ~XXNzz]?
N]ebKe
private void mergeSort(int[] data, int[] temp, int l, int r) { pFBK'NE
int i, j, k; d&ff1(j(
int mid = (l + r) / 2; !F Zg' 9
if (l == r) y34<B)Wy
return; (_N(K`4#W
if ((mid - l) >= THRESHOLD) Xe\v6gbD
mergeSort(data, temp, l, mid); b`GKGqbJ
else #op0|:/N
insertSort(data, l, mid - l + 1); bx-:aC)]2
if ((r - mid) > THRESHOLD) I2)2'j,B
mergeSort(data, temp, mid + 1, r); 7?vj+1;
else u{sb^cmy
insertSort(data, mid + 1, r - mid); _Db&f}.`
JZ> (h
for (i = l; i <= mid; i++) { va"bw!zXo*
temp = data; 3".#nN
} S`TQWWQo;
for (j = 1; j <= r - mid; j++) { vr6YE;Rs
temp[r - j + 1] = data[j + mid]; L)9Z Op5
} \0e`sOS`L
int a = temp[l]; iMV=R2t 2
int b = temp[r]; hdmKD0
for (i = l, j = r, k = l; k <= r; k++) { HHs!6`R$0c
if (a < b) { ^/}&z
data[k] = temp[i++]; ;R@D
a = temp; rz%^l1@-
} else { *q[;-E(fZ#
data[k] = temp[j--]; r{*BJi.b
b = temp[j]; s+=':Gcb(C
} ]8'PLsS9<w
} x2OAkkH\]i
} Cm"S=gV
e3[Q6d&|
/** 43O5|8o
* @param data [1z.JfC :S
* @param l "-rqL
* @param i &zP>pQr`#
*/ $Fy>N>,E(
private void insertSort(int[] data, int start, int len) { G9GLRdP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zW)Wt.svP
} K7nyQGS
} :l?mNm5
} lJT"aXt'M
} | :id/
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堆排序： lWT`y
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package org.rut.util.algorithm.support; H/={RuU
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import org.rut.util.algorithm.SortUtil; ooC9a>X
l(@c
/** aeAx0yE[p
* @author treeroot BL"7_phM,
* @since 2006-2-2 8.+ yZTg
* @version 1.0 HIC!:|
*/ k]`-Y E
public class HeapSort implements SortUtil.Sort{ :M<] 6o
)OVa7[-T
/* (non-Javadoc) \<G"9w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *v?kp>O
*/ hhFO,
public void sort(int[] data) { 7?y7fwER
MaxHeap h=new MaxHeap(); ou<,c?nNM
h.init(data); *;~u 5y2b
for(int i=0;i h.remove(); ^5(d^N
System.arraycopy(h.queue,1,data,0,data.length); TY'61xWi
} pVrY';[,|
y\Utm$)j
private static class MaxHeap{ 6<R[hIWpZ}
0z4M/WrNt
void init(int[] data){ B;W%P.<.
this.queue=new int[data.length+1]; X8N9*vy
for(int i=0;i queue[++size]=data; U%[ye0@:
fixUp(size); &g1\0t
} >}W[>WReI
} a(ITv roM/
dM P'Vnfj
private int size=0; B&0W P5OF
Pz\K3-
private int[] queue; u]9\_{c]Q
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public int get() { BenyA:W"
return queue[1]; 5,g +OY=\
} )5gj0#|CG@
$(]nl%<Q
public void remove() { G -+!h4p
SortUtil.swap(queue,1,size--); 85;bJfY
fixDown(1); ( }Bb=~
} /kg#i&bP~
file://fixdown 6N5(DD
private void fixDown(int k) { .R'M'a#*!A
int j; 6Io}3}3
while ((j = k << 1) <= size) { v+W'0ymbnV
if (j < size %26amp;%26amp; queue[j] j++; y$SUYG'v
if (queue[k]>queue[j]) file://不用交换 9OW8/H&!
break; GZNN2 '
SortUtil.swap(queue,j,k); {\P%J:s#9
k = j; UeLO`Ug0;
} c@3 5\!9
} 7bihP@I!
private void fixUp(int k) { jy?*`q1]
while (k > 1) { m m`#v g,
int j = k >> 1; wCruj`$
if (queue[j]>queue[k]) {7z]+h
break; |%v:>XEO
SortUtil.swap(queue,j,k); #~"IlBk\
k = j; L-C^7[48=
} Ui`{U
} ?X@[ibH6
QOSMV#Nw%
} 3mo4;F,h9
,}gJY^X+
} aaT3-][
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SortUtil： $DIy?kZ
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package org.rut.util.algorithm; ]Z8u0YtM)
pTwzVz~
import org.rut.util.algorithm.support.BubbleSort; :VZS7$5
import org.rut.util.algorithm.support.HeapSort; >Wt@O\k
import org.rut.util.algorithm.support.ImprovedMergeSort; qpYgTn8l7
import org.rut.util.algorithm.support.ImprovedQuickSort; }3X/"2SW^
import org.rut.util.algorithm.support.InsertSort; A%Ka)UU+n
import org.rut.util.algorithm.support.MergeSort; az0=jou<Zl
import org.rut.util.algorithm.support.QuickSort; v#%rjml[
import org.rut.util.algorithm.support.SelectionSort; e,_Sj(R8
import org.rut.util.algorithm.support.ShellSort; `v``}8tm
zdrP56rzZ
/** K6p\ >J
* @author treeroot nLz;L r!
* @since 2006-2-2 klT?h[I!
* @version 1.0 K {v^Y,B
*/ &|GH@^)@
public class SortUtil { yj4"eDg]
public final static int INSERT = 1; {\`ttc>
public final static int BUBBLE = 2; 9d#?,:JG
public final static int SELECTION = 3; mnK<5KLg1
public final static int SHELL = 4; 1Ys=KA-!_x
public final static int QUICK = 5; z@~H{glo
public final static int IMPROVED_QUICK = 6; ;P)oKx
public final static int MERGE = 7; Yu_*P-Ja6
public final static int IMPROVED_MERGE = 8; sPvs}}Z]P
public final static int HEAP = 9; *eIX"&ba
+?U[362>
public static void sort(int[] data) { cLf90|YFp
sort(data, IMPROVED_QUICK); )H W
} l+"p$iZs
private static String[] name={ +d\o|}c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -J+1V{
}; HZRFE[ 9nb
qr%N/7
private static Sort[] impl=new Sort[]{ ~F'6k&A^q
new InsertSort(), -@(LN%7!C
new BubbleSort(), g:Qq%'
new SelectionSort(), L.'61ZU
new ShellSort(), uK" T~
new QuickSort(), :k1?I'q%
new ImprovedQuickSort(), HAK,z0/
new MergeSort(), {TNORbZz
new ImprovedMergeSort(), cmXbkM
new HeapSort() #wIWh^^ Zy
}; !VWA4 e!+
,M3hE/rb/
public static String toString(int algorithm){ EO)JMV?6
return name[algorithm-1]; 90W=v*
} vK)'3%
1<_][u@
public static void sort(int[] data, int algorithm) { CjpGo}a/
impl[algorithm-1].sort(data); n/1t UF
} L'{W|Xb+
vEg%ivj3
public static interface Sort { $~FZJ@qa
public void sort(int[] data); m*_X PY
} Bp7p X
#b[bgxm
public static void swap(int[] data, int i, int j) { f5 bq)Pm&
int temp = data; ,1mL=|na
data = data[j]; I+kAy;2
data[j] = temp; 7o+L
} ' J@J$#6
} Vt}QPNt