[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; m=/HUt3(&0
} xDSiTp=)O
int i1=l; #pPR>,4
int i2=mid+1; fA0wQz]u
for(int cur=l;cur<=r;cur++){ ;`kOFg#`)c
if(i1==mid+1) "LW\osjen
data[cur]=temp[i2++]; ,KF>@3f
else if(i2>r) Y5B!*+h
data[cur]=temp[i1++]; B|+%ExT7
else if(temp[i1] data[cur]=temp[i1++]; (2"4PU8
else mo=@Zt
data[cur]=temp[i2++]; DYC2bs>
} 45iO2W uur
} 3-n&&<
uC#]F@
} t\!5$P
^h#A7 g
改进后的归并排序: #)#'^MZX
/k^j'MMQs6
package org.rut.util.algorithm.support; W~i0.rg|>
3/& |Z<f
import org.rut.util.algorithm.SortUtil; #q9BU:
e%{7CR'~TD
/** gh"_,ZhZt
* @author treeroot ~)X;z"y%b
* @since 2006-2-2 \,:7=
* @version 1.0 -GQ.B{%G
*/ #.Ly
public class ImprovedMergeSort implements SortUtil.Sort { L=s8em]7l
qEdY]t
private static final int THRESHOLD = 10; 73tjDO7d
/^&$ma\
/* ZX{eggXl
* (non-Javadoc) =FFs8&PKys
* gB,Q4acjj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oW(8bd)
*/ Ml+f3#HP
public void sort(int[] data) { o(t`XE['<
int[] temp=new int[data.length]; ~Sd,Tu%:
mergeSort(data,temp,0,data.length-1); ]Rp<64I o
} Y!|};
m5KLi &R
private void mergeSort(int[] data, int[] temp, int l, int r) { E!I4I'
int i, j, k; [!ZYtp?Hf
int mid = (l + r) / 2; D6e<1W
if (l == r) +,D82V7S
return; Rob:W|
if ((mid - l) >= THRESHOLD) ~ r$I&8
mergeSort(data, temp, l, mid); y92<(ziaX)
else nXxnyom,
insertSort(data, l, mid - l + 1); [~Z#yEiW^
if ((r - mid) > THRESHOLD) X<1ymb3
mergeSort(data, temp, mid + 1, r); 3|Ar~_]
else xrJ0
insertSort(data, mid + 1, r - mid); rj5)b:c}
PKs$Q=Ol<|
for (i = l; i <= mid; i++) { a<V Mh79*
temp = data; 2b:I.
} EkN>5).
for (j = 1; j <= r - mid; j++) { /J,&G: Er
temp[r - j + 1] = data[j + mid]; %g4)f9>
} Pp|pH|(n ,
int a = temp[l]; {Z[kvXf"mZ
int b = temp[r]; $g#d1u0q
for (i = l, j = r, k = l; k <= r; k++) { _'s5FlZq
if (a < b) { +6Vu]96=KC
data[k] = temp[i++]; "n<u(m8E
a = temp; G&7 } m
} else { k_%maJkXp
data[k] = temp[j--]; yhyh\.
b = temp[j]; GuJIN"P]
} nON"+c*
} .>(qZEF
} m$q*
Lismo#
/** @(rLn
* @param data sZU Ao&
* @param l u\UI6/
* @param i 5d82Ms
*/ jY\YSQ
private void insertSort(int[] data, int start, int len) { E`uK7 2j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /M_kJe,%
} d _koF-7
} _Hq)mF
} %w6lNl
} 9}Zi_xK&|e
u+e.{Z!
堆排序： 4:v{\R
& |o V\L
package org.rut.util.algorithm.support; '~'3x4Bo
\t@|-`
import org.rut.util.algorithm.SortUtil; aMjCqu05
rhvsd2zi
/** K3t^y`z
* @author treeroot -n'%MT=Cd
* @since 2006-2-2 K?+Rq
* @version 1.0 ]7{-HuQ8>}
*/ x;*KRO
public class HeapSort implements SortUtil.Sort{ O8ZHIs
zHCz[jlrMq
/* (non-Javadoc) T/C1x9=?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Djf,#&j!3
*/ %Gs!oD
public void sort(int[] data) { !xK`:[B
MaxHeap h=new MaxHeap(); JEes'H}Y
h.init(data); mWM!6"
for(int i=0;i h.remove(); /fc@=CO
System.arraycopy(h.queue,1,data,0,data.length); 07+Qai-]
} etH%E aF[
Wz7jB6AWA
private static class MaxHeap{ ),)]gw71QW
bXiT}5mJU
void init(int[] data){ DP9hvu/85
this.queue=new int[data.length+1]; `D%bZ%25c
for(int i=0;i queue[++size]=data; l8hOryB&
fixUp(size); # -Ts]4v
} 7>J8\=
} ( Qw"^lE3
x*[\$E`v
private int size=0; JQ8wL _C>
v}ZQC8wL
private int[] queue; ;,]T|>M
1$T;u~vg
public int get() { V/5.37FSb
return queue[1]; L[o;@+32
} @zo}#.g
t&}Z~Zp
public void remove() { ya7PF~:E-
SortUtil.swap(queue,1,size--); uvR9BL2=
fixDown(1); )@+lfIE(l
} [mwJ*GJ-
file://fixdown U$jw8I'.
private void fixDown(int k) { };;\&#
int j; gq9IJ
while ((j = k << 1) <= size) { pa4,W!t
if (j < size %26amp;%26amp; queue[j] j++; &c!d}pU}
if (queue[k]>queue[j]) file://不用交换 XJJdCv^
break; ZslH2#
SortUtil.swap(queue,j,k); 5@l[!Jl0k
k = j; GP=i6I6C
} HQPb
} EC9D.afy&
private void fixUp(int k) { s}"5uDfn1F
while (k > 1) { R-odc,P=
int j = k >> 1; qkQ_#
if (queue[j]>queue[k]) YdsY2
break; ybnq;0}$
SortUtil.swap(queue,j,k); Cwo(%Wc
k = j; xX;@ BS
} P$l-p'U-
} ]MI>"hn
@ qFE6!
} Qdepzo>E
epz'GN]V
} :CH*~o
_`RzPIS^
SortUtil： |GmV1hN
?Q$LIoR
package org.rut.util.algorithm; MYVUOd,
1|K>V;C
import org.rut.util.algorithm.support.BubbleSort; `D2wlyqO6
import org.rut.util.algorithm.support.HeapSort; -KzU''
import org.rut.util.algorithm.support.ImprovedMergeSort; t<`h(RczHI
import org.rut.util.algorithm.support.ImprovedQuickSort; %y@iA91K
import org.rut.util.algorithm.support.InsertSort; 5Gj?'Wov9
import org.rut.util.algorithm.support.MergeSort; JGmW>mH
import org.rut.util.algorithm.support.QuickSort; >;E[XG^
import org.rut.util.algorithm.support.SelectionSort; 9ICC2%j|
import org.rut.util.algorithm.support.ShellSort; ONx|c'0g
{?a9>g-BW
/** IKJ~sw~AQ
* @author treeroot @G/':N
* @since 2006-2-2 F~Kd5-I@
* @version 1.0 )9,*s!)9
*/ cQ4TYr;?
public class SortUtil { ++KY+j.^
public final static int INSERT = 1; IBwquw+
public final static int BUBBLE = 2; =k4yWC5-
public final static int SELECTION = 3; niO(>
public final static int SHELL = 4; qZ!1>`B
public final static int QUICK = 5; nG#lrYZw
public final static int IMPROVED_QUICK = 6; Q*TxjE7K
public final static int MERGE = 7; D\Y)E#%,
public final static int IMPROVED_MERGE = 8; FNZB M
public final static int HEAP = 9; I3Sl>e(Z
2|k*rv}l
public static void sort(int[] data) { .js4)$W^
sort(data, IMPROVED_QUICK); 9X&Xs/B
} ^H+j;K{5,
private static String[] name={ *$(=I6b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /p,D01Ws}(
}; CiP-Zh[gZ
]\nG1+ta
private static Sort[] impl=new Sort[]{ A>L(#lz#ek
new InsertSort(), @C=, >+D
new BubbleSort(), $"{V],:T |
new SelectionSort(), ~H0~5v F
new ShellSort(), :C42yQAP
new QuickSort(), y? [*qnPj
new ImprovedQuickSort(), hoC}@8_
new MergeSort(), -<#n7b
new ImprovedMergeSort(), tYfhKJzGC
new HeapSort() yZ:|wxVY
}; '$)Wp_
Fc}wuW
public static String toString(int algorithm){ PqcuSb6
return name[algorithm-1]; #},]`"n\
} n#3y2,Ml
u2<:mu[|P
public static void sort(int[] data, int algorithm) { c7\bA7.
impl[algorithm-1].sort(data); kSNVI-Wzu
} $#4z>~0
wri[#D {
public static interface Sort { ]CC= \<
public void sort(int[] data); ~s^&*KaA
} v03~=(
+:&(Ag
public static void swap(int[] data, int i, int j) { 3|:uIoR{
int temp = data; Lu:!vTRmw
data = data[j]; glHag"(
data[j] = temp; *ep!gT*4
} 8Z3+S)6
} >mF`XbS