[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; 3Ne9%"
} V"w`!
int i1=l; -iY9GN89c
int i2=mid+1; }pbBo2
for(int cur=l;cur<=r;cur++){ ^2C0oX
if(i1==mid+1) k&MlQ2'!<
data[cur]=temp[i2++]; ?BWHr(J
else if(i2>r) M(_^'3u
data[cur]=temp[i1++]; jl;kcGE
else if(temp[i1] data[cur]=temp[i1++]; N$N;Sw
else `G_(xN7O
data[cur]=temp[i2++]; Es.toOH$S
} 73'U#@g6
} X_vI0YX9
3*CzXK>`M&
} +A]&AkTw
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改进后的归并排序: ):/<H
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package org.rut.util.algorithm.support; } l:mN
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import org.rut.util.algorithm.SortUtil; ,:0Q1~8
ZAI1p+
/** 2neF<H?^o
* @author treeroot B, QC-Tn
* @since 2006-2-2 A8_\2'b
* @version 1.0 1<XiD3H;
*/ kA7~Yu5|
public class ImprovedMergeSort implements SortUtil.Sort { c%q}"Y0oh
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private static final int THRESHOLD = 10; ;FV~q{
!L&=?CX
/* -_y~rx >
* (non-Javadoc) t!J";l
* Uq9,(tV`6g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wQF&GGYR
*/ <7vIh0
public void sort(int[] data) { ",MK'\E
int[] temp=new int[data.length]; aX>4Tw
mergeSort(data,temp,0,data.length-1); ?)A]q' O
} "o\6k"_c>
3EbnZb
private void mergeSort(int[] data, int[] temp, int l, int r) { u#zP>!
int i, j, k; NZfo`iHAN
int mid = (l + r) / 2; 1Qp1Es<)
if (l == r) W+#}~2&Dv
return; 4FfwpO3,Ku
if ((mid - l) >= THRESHOLD) BxSk%$J
mergeSort(data, temp, l, mid); xm<5S;E5U4
else "-0pz\a
insertSort(data, l, mid - l + 1); M9uH&CD6U
if ((r - mid) > THRESHOLD) H$k![K6Uj
mergeSort(data, temp, mid + 1, r); ?=/}Ft
else JL" 3#p}
insertSort(data, mid + 1, r - mid); afxj[;p!
zxk??0]/
for (i = l; i <= mid; i++) { %4|n-`:
temp = data; ]>VJ--fH
} ~|aeKtCs(.
for (j = 1; j <= r - mid; j++) { USnD7I/b
temp[r - j + 1] = data[j + mid]; `@u+u0
} vSyi}5D
int a = temp[l]; NPB,q& Th
int b = temp[r]; 8I5VrT
for (i = l, j = r, k = l; k <= r; k++) { |1_$! p
if (a < b) { w*&n(zJF>
data[k] = temp[i++]; <2o.,2?G
a = temp; g(@$uJ
} else { ^Ff~j&L@{
data[k] = temp[j--]; !Zk%P
b = temp[j]; f^[{k {t
} bMK#^ZoH
} =\ti<
} "6I-]:K-
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/** h-?q6O/|
* @param data 0I(GB;E
* @param l (/9.+V_
* @param i aIn)']
*/ 4y]:Gqz~
private void insertSort(int[] data, int start, int len) { JR? )SGB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i(&6ys5
} s60:0>
} NE=#5?6%g7
} r2E>sHw
} 6*(h9!_T1
vUo.BA#;.b
堆排序： v2Qc}o
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package org.rut.util.algorithm.support; 0aTEJX$iZ
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import org.rut.util.algorithm.SortUtil; RF,=bOr19
=E"kv!e
/** Ul$X%
* @author treeroot iS:PRa1
* @since 2006-2-2 rr07\;
* @version 1.0 FkJ>]k
*/ !Z+*",]_
public class HeapSort implements SortUtil.Sort{ 5ykk11!p$
TY54e T
/* (non-Javadoc) JT.\f,z&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fo!Lp*'0
*/ {P<BJ52=
public void sort(int[] data) { Vav+$l|j@
MaxHeap h=new MaxHeap(); #T$'.M
h.init(data); %_j?<h&
for(int i=0;i h.remove(); -NflaV~
System.arraycopy(h.queue,1,data,0,data.length); )]>i>
} o$HJg
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private static class MaxHeap{ .Kh(F6 s
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void init(int[] data){ ) v[Knp'
this.queue=new int[data.length+1]; {>UMw>T[
for(int i=0;i queue[++size]=data; '^-4{Y^2E
fixUp(size); RBK>Lws6
} cDQw`ORP*g
} G0 nH Z6
LDi ezi
private int size=0; o+X'(!Trw
>QZt)<[
private int[] queue; +,F= -
ax{-Qi7z-+
public int get() { lU50.7<08
return queue[1]; f@;>M9)<
} LO$#DHPt
Q:fUM[
public void remove() { YP\4XI
SortUtil.swap(queue,1,size--); Xb+if
fixDown(1); q/w6sQx$
} 2=/g~rp*
file://fixdown tO+%b=Z^
private void fixDown(int k) { Og;$P'U
int j; C5sN[
while ((j = k << 1) <= size) { '+q'H
if (j < size %26amp;%26amp; queue[j] j++; sw qky5_K
if (queue[k]>queue[j]) file://不用交换 E/L?D
break; m)[wZP*e
SortUtil.swap(queue,j,k); h@>rjeY@
k = j; G5QgnxwP2
} /nMqEHCyg
} '/yx_RK2?
private void fixUp(int k) { $Op/5j
while (k > 1) { wkZ2Y-#='
int j = k >> 1; 1:;&wf
if (queue[j]>queue[k]) LnRi+n[@7
break; A]SB c2
SortUtil.swap(queue,j,k); !7NzW7j
k = j; xBI"{nGoN
} E~Up\f
} aIt 0;D
Am=PUQF$
} P#2TM
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} T\e)Czz2-
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SortUtil： o%~K4 M".
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package org.rut.util.algorithm; :J4C'N
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import org.rut.util.algorithm.support.BubbleSort; @qhg[= @
import org.rut.util.algorithm.support.HeapSort; y1"^S
import org.rut.util.algorithm.support.ImprovedMergeSort; 0&rH 9
import org.rut.util.algorithm.support.ImprovedQuickSort; VGDEP!)-8
import org.rut.util.algorithm.support.InsertSort; z5*O@_r+.b
import org.rut.util.algorithm.support.MergeSort; D16;6K'{
import org.rut.util.algorithm.support.QuickSort; jf)JPa_
import org.rut.util.algorithm.support.SelectionSort; 8DS5<
import org.rut.util.algorithm.support.ShellSort; = cI\OsV&?
Y`O}]*{>8R
/** Y)j,(9
* @author treeroot 5$"[gdt)T
* @since 2006-2-2 {8bY7NH|
* @version 1.0 l-h7ksRs
*/ "RJk7]p`*
public class SortUtil { TcKKI
public final static int INSERT = 1; 7E6?)bgh
public final static int BUBBLE = 2; 2,e|,N"zN
public final static int SELECTION = 3; |xgCV@
public final static int SHELL = 4; 8H`l"
public final static int QUICK = 5; j&G~;(DY
public final static int IMPROVED_QUICK = 6; W4rw;(\
public final static int MERGE = 7; cV!/
public final static int IMPROVED_MERGE = 8; (_n8$3T75
public final static int HEAP = 9; BK\~I
"$"mWF-
public static void sort(int[] data) { {FmFu$z+[
sort(data, IMPROVED_QUICK); u/:Sf*;?
} "vRqtEBO@
private static String[] name={ \utH*;J|x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dv9Pb5i
}; nu9k{owB T
e4W];7_K!
private static Sort[] impl=new Sort[]{ 4!s k3Cw{
new InsertSort(), e"H+sM26-
new BubbleSort(), {)[g
new SelectionSort(), Di1G
new ShellSort(), vls> 6h
new QuickSort(), [c!vsh]^
new ImprovedQuickSort(), iIEIGQx
new MergeSort(), ~V- o{IA
new ImprovedMergeSort(), |v'5*n9
new HeapSort() +p}Xmn
}; "u]Fl+c
r~Ubgd ]U
public static String toString(int algorithm){ rMFZ#38d
return name[algorithm-1]; Y(yJ|y&
} i\z0{;f|GX
PaeafL65=
public static void sort(int[] data, int algorithm) { Pk]9.e1_
impl[algorithm-1].sort(data); Ay6rUN1ef
} .&Gtw _
qmyZbo|8&
public static interface Sort { 9a Ps_|C
public void sort(int[] data); }N9a!,{P=b
} ]~M{@h!<
257;@;
public static void swap(int[] data, int i, int j) { iR5soIR
int temp = data; E|uXi)!.x
data = data[j]; \*"0wR;[K
data[j] = temp; vHe.+XY
} F"#*8P
} WIlS^?5I<