[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; Y)lr+~84f
} ><IWF#kUA
int i1=l; IEm~^D#<=
int i2=mid+1; `Rq|*:LV
for(int cur=l;cur<=r;cur++){ "XV@OjrE
if(i1==mid+1) #mUQ@X@K
data[cur]=temp[i2++]; b"#S92R+
else if(i2>r) .H M3s
data[cur]=temp[i1++]; W//+[
else if(temp[i1] data[cur]=temp[i1++]; hTO2+F*
else Va.TUz4
data[cur]=temp[i2++]; Md>C!c
} yc9!JJMkH
} >Ho=L)u
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} 03|nP$g
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改进后的归并排序: `)]W~
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package org.rut.util.algorithm.support; :,v(lq
v,Z]Vqk
import org.rut.util.algorithm.SortUtil; (ot56`,k
(t&`m[>K
/** Z-ci[Zv
* @author treeroot `$JZJ!,A
* @since 2006-2-2 6W3oIt
* @version 1.0 ]Oo!>iTQi
*/ :epB:r
public class ImprovedMergeSort implements SortUtil.Sort { p`7d9MV^
]<YS7.pT
private static final int THRESHOLD = 10; q Sv!5&u
Ca?w"m~h
/* W[`ybGR<
* (non-Javadoc) (>u1O V
* ND?"1/s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E]&N'+T
*/ %nq<nfDT
public void sort(int[] data) { 2P'Vp7f6 Y
int[] temp=new int[data.length]; :+QNN<
mergeSort(data,temp,0,data.length-1); .j,xh )v"
} fk?!0M6d
WhH60/`
private void mergeSort(int[] data, int[] temp, int l, int r) { FdnLxw
int i, j, k; [bo"!Qk%
int mid = (l + r) / 2; iKu3'jZ/O
if (l == r) tFn[U#'
return; =Oh$pZRymu
if ((mid - l) >= THRESHOLD) nXfz@q
mergeSort(data, temp, l, mid); O,^s)>c
else Yyd}>+|<,
insertSort(data, l, mid - l + 1); v_%6Ly
if ((r - mid) > THRESHOLD) ("}Hs[
mergeSort(data, temp, mid + 1, r); ^fd*KM
else Ho/tCU|w
insertSort(data, mid + 1, r - mid); O\;Lb[`lb
3HP { a
for (i = l; i <= mid; i++) { _a"| :kX
temp = data; rDwd!Jet
} [{xY3WS
for (j = 1; j <= r - mid; j++) { ph(LsPT-
temp[r - j + 1] = data[j + mid]; (dNF)(wn
} |8k^jq
int a = temp[l]; I;_T_m4.q
int b = temp[r]; \j)c?1*$
for (i = l, j = r, k = l; k <= r; k++) { $$4flfx
if (a < b) { BIx*(
data[k] = temp[i++]; 8,+T[S
a = temp; |mWSS'7fI
} else { j+AZ!$E
data[k] = temp[j--]; W6EEC<$JL
b = temp[j]; hr'?#K
} Q2)5A&U\
} XZ$g~r
} Dqwd=$2%
'#j6ZC/?
/** KdHkX+-R
* @param data }>y~P~`S:
* @param l !(Y|Vm'
* @param i :u=y7[I
*/ Z(4/;v <CT
private void insertSort(int[] data, int start, int len) { j&A9 &+w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f]Aa$\@b
} j;j~R3B
} fWfhs}_
} k8}'@w
} $`0^E#Nl
FChW`b&S
堆排序： xk8NX-:
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package org.rut.util.algorithm.support; ]+qd|}^
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import org.rut.util.algorithm.SortUtil; Fgwe`[
9_&]7ABV
/** $E:z*~?
* @author treeroot AoxORPp'
* @since 2006-2-2 4TU\SP8sM
* @version 1.0 ?_S);
*/ {ByKTx&
public class HeapSort implements SortUtil.Sort{ #|:q"l9
#X!seQ7a
/* (non-Javadoc) ],R\oMYy|P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -2U|G
*/ )Rk(gd
public void sort(int[] data) { ,e`n2)
MaxHeap h=new MaxHeap(); X&49C:jN
h.init(data); @{<^rLt
for(int i=0;i h.remove(); 5 8U[IGs(
System.arraycopy(h.queue,1,data,0,data.length); PDgZb
} O6-';H:I]L
:u@ w;
private static class MaxHeap{ v,rKuvc'
/!"sPtIh
void init(int[] data){ yQu/({D
this.queue=new int[data.length+1]; 98zJ?NaD&
for(int i=0;i queue[++size]=data; ]4*E:
fixUp(size); e*D,2>o
} Opy{i#>
} <Fl.W}?Q}
%_5?/H@%3z
private int size=0; iY sQ:3s
a{ByU%
private int[] queue; +]H!q W:
0H'G./8
public int get() { !14v Ovj4{
return queue[1]; cZ.p
} @v/Ae_q!
0Y~5|OXJ
public void remove() { 1Sns$t%b
SortUtil.swap(queue,1,size--); q8e]{sT'!
fixDown(1); [zrFW g6N
} a*_" nI&lr
file://fixdown sC :.}6
private void fixDown(int k) { YB{'L +Wbw
int j; \Q?#^<O
while ((j = k << 1) <= size) { *'n=LB8R
if (j < size %26amp;%26amp; queue[j] j++; {ueDwnZ
if (queue[k]>queue[j]) file://不用交换 /(s N@kt
break; w);Bet
SortUtil.swap(queue,j,k); v&66F`
k = j; cSTL.QF
} Qq.Ja%Zq
} 5]3Mj*u\
private void fixUp(int k) { uD4W@*PYr
while (k > 1) { eM7F8j
int j = k >> 1; >v/%R~BuX
if (queue[j]>queue[k]) UD2l!)rW
break; _*t75e$-
SortUtil.swap(queue,j,k); ZU7u>
k = j; g</Mk^CE
} <@n3vO6
} `,c~M
ub4(g~E
} e:QH3|'y
j2hp*C'^
} gb^'u
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SortUtil： ^NxKA'oWQ
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package org.rut.util.algorithm; 7zNfq.Ni~
r8_MIGM'
import org.rut.util.algorithm.support.BubbleSort; l>7?B2^<E
import org.rut.util.algorithm.support.HeapSort; P$/Y9o
import org.rut.util.algorithm.support.ImprovedMergeSort; fhki!# E8M
import org.rut.util.algorithm.support.ImprovedQuickSort; catJC3
import org.rut.util.algorithm.support.InsertSort; ]6WP;.[
import org.rut.util.algorithm.support.MergeSort; |5BvVqn
import org.rut.util.algorithm.support.QuickSort; }%,LV]rGEZ
import org.rut.util.algorithm.support.SelectionSort; P[,
import org.rut.util.algorithm.support.ShellSort; kxY9[#:<fB
;l@Ge`&u
/** <+<,$jGC-
* @author treeroot NQd0$q
* @since 2006-2-2 \Dx)P[Ur
* @version 1.0 v@:m8Y(t
*/ 5lE9UoG[Q
public class SortUtil { pf&SIG
public final static int INSERT = 1; xwijCFI*
public final static int BUBBLE = 2; '^:q|h
public final static int SELECTION = 3; uHt@;$9A
public final static int SHELL = 4; 7C@m(oK
public final static int QUICK = 5; *.-qbwOg
public final static int IMPROVED_QUICK = 6; OV7SLf
public final static int MERGE = 7; n*eqM2L
public final static int IMPROVED_MERGE = 8; x{VUl
public final static int HEAP = 9; 2cv=7!K4Uv
)aX#RM? N
public static void sort(int[] data) { @WzrrCpj
sort(data, IMPROVED_QUICK); pm*i!3g'
} H<3ayp$
private static String[] name={ }pT>dbZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @.v{hkM`
}; ].N%A07
[ldx_+xa:E
private static Sort[] impl=new Sort[]{ Ehtb`Ms
new InsertSort(), ;E\e.R
new BubbleSort(), 1KI5tf>>p
new SelectionSort(), @p9YHLxLjQ
new ShellSort(), ;.d{$SO
new QuickSort(), 0(|36;x
new ImprovedQuickSort(), )KN]"<jB
new MergeSort(), e[.JS6
new ImprovedMergeSort(), hJoh5DIE95
new HeapSort() ue!wo-|#G
}; SKSI\]Cc
4AN(4"$N
public static String toString(int algorithm){ k=.pcDX
return name[algorithm-1]; 6p~8(-nG
} .!g
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public static void sort(int[] data, int algorithm) { V_H0z
impl[algorithm-1].sort(data); frbeCBP&)
} k{+Gv}Y
m^1'aO_;q
public static interface Sort { 9Ui|8e~=
public void sort(int[] data); .:TSdusr~
} BHIC6i%
m/1;os5+8
public static void swap(int[] data, int i, int j) { R-BN}ZS
int temp = data; (fC U+
data = data[j]; h_xzqElZu
data[j] = temp; FmtV[C#
} 5[rA>g~
} qa/VSk!{