[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; 6.!Cm$l
} = UT^5cl(
int i1=l; l"#}g%E
int i2=mid+1; feH|sz`e
for(int cur=l;cur<=r;cur++){ 30fsVwE2
if(i1==mid+1) @rO4BTi>O
data[cur]=temp[i2++]; {T0f]]}Q
else if(i2>r) 3. kP,
data[cur]=temp[i1++]; Gw/imXL
else if(temp[i1] data[cur]=temp[i1++]; (A\p5@ht
else R\B-cU[,
data[cur]=temp[i2++]; 3k J8Wn
} "XEKoeG{
} Wx<fD()
?x|8"*N
} jJxV)AIY
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改进后的归并排序: l#W9J.q(
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package org.rut.util.algorithm.support; >Bj+!)96q
8d90B9
import org.rut.util.algorithm.SortUtil; *P#okwp
i+2fWi6Z+
/** $ {iV]Xt
* @author treeroot {q[l4_
* @since 2006-2-2 YMidSfi
* @version 1.0 \UdHN=A&
*/ 8e`'Ox_5a
public class ImprovedMergeSort implements SortUtil.Sort { gRk%ObJGqm
QeK@++EVc
private static final int THRESHOLD = 10; xMAfa>]{n
0jlwL
/* y7;i4::A\
* (non-Javadoc) =Mb1)^m
* "QWF&-kAI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^=H. .pr
*/ 1kG{z;9
public void sort(int[] data) { _k0X)N+li
int[] temp=new int[data.length]; NDJIaX:]
mergeSort(data,temp,0,data.length-1); qH3|x08
} SIBNU3;DL
!ys82
private void mergeSort(int[] data, int[] temp, int l, int r) { C6=P(%y
int i, j, k; {xw"t9(fE
int mid = (l + r) / 2; e;y\v/A
if (l == r) Q -!,yCu
return; . C g2Y
if ((mid - l) >= THRESHOLD) om`x"x&6
mergeSort(data, temp, l, mid); Mpfdl65
else QJL%J
insertSort(data, l, mid - l + 1); -'j_JJ
if ((r - mid) > THRESHOLD) y~.k-b<{[
mergeSort(data, temp, mid + 1, r); ,cbCt
else 2VrO8q(
insertSort(data, mid + 1, r - mid); ?R7>xrp5
+:hZ,G?>
for (i = l; i <= mid; i++) { l\PDou@5
temp = data; i?.7o*w8
} +1Qa7\
for (j = 1; j <= r - mid; j++) { (v11;kdJB
temp[r - j + 1] = data[j + mid]; 7QXA*.' F
} "f/Su(6{0
int a = temp[l]; Hm>M}MF3
int b = temp[r]; BO#XQ,
for (i = l, j = r, k = l; k <= r; k++) { FKTdQg|NZ
if (a < b) { v"y0D
data[k] = temp[i++]; 9] i$`y
a = temp; HLL[r0P`F
} else { ^sLnKAN
data[k] = temp[j--]; PGaB U3
b = temp[j]; hJrcy!P<a
} cQ= "3M)~r
} f`zH#{u
} 334UMH__
DB1GW,
/** huMNt6P[
* @param data "|{3V:e>a
* @param l IO,ddVO
* @param i J^}w,r*=
*/ 2~:jg1
private void insertSort(int[] data, int start, int len) { +(v<_#wR-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .T*K4m{b0
} $$UMc-Pq
} <78]OZ] Z
} t7A '
} U>0' K3_
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堆排序： 1`t4wD$/
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package org.rut.util.algorithm.support; tCT-cs
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import org.rut.util.algorithm.SortUtil; OYcf+p"<\
RYU(z;+0p
/** 8vzjPWu
* @author treeroot s[{L.9Y
* @since 2006-2-2 %9|}H [x
* @version 1.0 1J}i :i&
*/ 4vri=P 2%
public class HeapSort implements SortUtil.Sort{ k=t\
Va^AEuzF
/* (non-Javadoc) 'b#`)w@/=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nWTo$*>W
*/ y[U/5! `zV
public void sort(int[] data) { DP2 ^(d<
MaxHeap h=new MaxHeap(); E0K'|*
h.init(data); mL\j^q,Y
for(int i=0;i h.remove(); )` nX~_'p
System.arraycopy(h.queue,1,data,0,data.length); em^|E73
} >Ab>"!/'K
(TufvHC
private static class MaxHeap{ BMw_F)hTO
Wa#!O$u
void init(int[] data){ ]LFY2w<
this.queue=new int[data.length+1]; Q'f!392|
for(int i=0;i queue[++size]=data; j, SOL9yg
fixUp(size); Q>\y%&df
} t;P%&:"@M
} GA19=gow
z^s40707x
private int size=0; #UR4I2t*
g8 (zvG;Y
private int[] queue; l3Vw?f
y %dUry%>
public int get() { "=l<%em
return queue[1]; i ! wzID
} I(6k.PQ
GarPnb
public void remove() { __U;fH{c
SortUtil.swap(queue,1,size--); U#oe8(?#
fixDown(1); */gm! :Ym
} {^TVZdw
file://fixdown ]h0Fv-[A
private void fixDown(int k) { rbP" n)0=
int j; :3qA7D}
while ((j = k << 1) <= size) { #JAU5d
if (j < size %26amp;%26amp; queue[j] j++; {I s?>m4
if (queue[k]>queue[j]) file://不用交换 RX",Zt$q
break; 4l! ^"=rh
SortUtil.swap(queue,j,k); /yHM=&Vg]
k = j; ygm4Aj>
} 8i!~w 7z
} *uYnu|UQH
private void fixUp(int k) { 76[O3%
while (k > 1) { OtuOT=%
int j = k >> 1; &*TwEN^h
if (queue[j]>queue[k]) iE}jilU
break; l6b3i v,
SortUtil.swap(queue,j,k); 8Rq+eOP=S
k = j; WeGT}
} 1gp3A
} &&e{9{R
`Q!|/B
} wI+oG
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} <Sn5ME<*
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SortUtil： n50XGv
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package org.rut.util.algorithm; ^n5[pF}Gw
Tfc5R;Rw
import org.rut.util.algorithm.support.BubbleSort; *JXiOs
import org.rut.util.algorithm.support.HeapSort; O~F/pJN`
import org.rut.util.algorithm.support.ImprovedMergeSort; kzCD>m
import org.rut.util.algorithm.support.ImprovedQuickSort; gvYib`#
import org.rut.util.algorithm.support.InsertSort; pfW0)V1t
import org.rut.util.algorithm.support.MergeSort; <Vp7G%"'W
import org.rut.util.algorithm.support.QuickSort; 2BOe,giy
import org.rut.util.algorithm.support.SelectionSort; }zVPdBRfm
import org.rut.util.algorithm.support.ShellSort; 70!&
P/._ tQu6
/** {HeIY2
* @author treeroot \RZFq<6>
* @since 2006-2-2 U6qv8*~
* @version 1.0 0 1[LPN
*/ $NP5Z0v7
public class SortUtil { JDVMq=ui
public final static int INSERT = 1; <^VZ4$j
public final static int BUBBLE = 2; VAf~,T]Ww
public final static int SELECTION = 3; 1E!0N`E
public final static int SHELL = 4; ,-Fhb~u
public final static int QUICK = 5; ~1YL
public final static int IMPROVED_QUICK = 6; sqHvrI
public final static int MERGE = 7; }NPF]P;
public final static int IMPROVED_MERGE = 8; rAD5n,M]
public final static int HEAP = 9; +v%V1lf^~
B?c9cS5Mj
public static void sort(int[] data) { FQ?,&s$Bmd
sort(data, IMPROVED_QUICK); 4R\bU"+jZ_
} l5S(xQ
private static String[] name={ p8y_uNQE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "/hM&
}; qWe1`.o
>L/Rf8j&
private static Sort[] impl=new Sort[]{ f&t]O$
new InsertSort(), _GK^7}u
new BubbleSort(), !_s|h@
new SelectionSort(), 35Nwx<
new ShellSort(), cs`/^2Vf"#
new QuickSort(), u814ZN}
new ImprovedQuickSort(), UiS9uGj
new MergeSort(), Ea1{9>S
new ImprovedMergeSort(), vTjgW?9
new HeapSort() evPr~_
}; OlhfBu)~
4vTO #F
public static String toString(int algorithm){ ` 1DJwe2
return name[algorithm-1]; }gyJaMA
} =<(:5ive
v vlfL*f
public static void sort(int[] data, int algorithm) { 'P}"ZHW
impl[algorithm-1].sort(data); ^4]#Ri=U
} oM-{)rvQd
@``kt*+K+
public static interface Sort { Y+<C[Fiq
public void sort(int[] data); 9}`O*A=KC
} @B ~![l
;6t>!2I>C
public static void swap(int[] data, int i, int j) { SqFya
int temp = data; ]>/YU*\
data = data[j]; `3kE$h#
data[j] = temp; &/=>:ay+#
} Gk,{{:M:5
} #h ;j2