[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; ,-XJ@@2gM
} t(:6S$6{e
int i1=l; e[@ ^UY
int i2=mid+1; 2)^[SpZ
for(int cur=l;cur<=r;cur++){ 7" wn024
if(i1==mid+1) WxS=Aip'
data[cur]=temp[i2++]; 7#R& OQ
else if(i2>r) UVD::
data[cur]=temp[i1++]; D|D1`CIM
else if(temp[i1] data[cur]=temp[i1++]; 8c'0"G@S
else %KmB>9
data[cur]=temp[i2++]; _(\\>'1q!
} ].2it{gF?b
} \'L6m1UZ%
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} "lf_`4
]41G!'E=
改进后的归并排序: uhLg2G^h
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package org.rut.util.algorithm.support; nA]dQ+5sT
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import org.rut.util.algorithm.SortUtil; Hvq< _&2
7=ZB;(`L1
/** xUD$i?3z
* @author treeroot F*d{<
* @since 2006-2-2 u[jdYWQa
* @version 1.0 2r~ Nh](
*/ <>JDA(F"
public class ImprovedMergeSort implements SortUtil.Sort { Xklp6{VH9
!P!|U/|c
private static final int THRESHOLD = 10; [VPqI~u5)
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/* 8[FC
* (non-Javadoc) FK#>E[[
* FJ}QKDQW=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ':!;6v|L
*/ uu>[WFh
public void sort(int[] data) { 'eo2a&S2D
int[] temp=new int[data.length]; *0R=(Gy
mergeSort(data,temp,0,data.length-1); g-%uw[pf
} t MB;GIb#
cuR|cUK
private void mergeSort(int[] data, int[] temp, int l, int r) { Z<r&- !z
int i, j, k; |"P5%k#6^>
int mid = (l + r) / 2; &fj&UBA
if (l == r) &K^h'>t'
return; o\Hg2^YY>
if ((mid - l) >= THRESHOLD) T"Q4vk,3*J
mergeSort(data, temp, l, mid); l{Hi5x'H
else {F k]X#j
insertSort(data, l, mid - l + 1); 3MjMN%{P
if ((r - mid) > THRESHOLD) ;:9 x.IkxC
mergeSort(data, temp, mid + 1, r); va;d[D,
else `>8|
insertSort(data, mid + 1, r - mid); _uHyE }d
kQIWDN
for (i = l; i <= mid; i++) { fINM$ 6
temp = data; cx2s|@u0
} ORx,n7-
for (j = 1; j <= r - mid; j++) { igz:ek`
temp[r - j + 1] = data[j + mid]; Sjr(e}*
} `bT{E.(T
int a = temp[l]; HXdPKS4q
int b = temp[r]; O|j5ulO}&"
for (i = l, j = r, k = l; k <= r; k++) { 8XJ%Yuu
if (a < b) { q{7s.m >
data[k] = temp[i++]; xel&8 `
a = temp; ~.x!st}
} else { @-b}iP<T
data[k] = temp[j--]; >uOc#+5M.
b = temp[j]; v&XG4 &
} w.l#Z} k
} G)43Y!
} u>S&?X'a
]NAPvw#p
/** GN1cnM>`
* @param data C [2tH2*#
* @param l wOi>i`D&
* @param i t41cl
*/ _i8$!b2Mr
private void insertSort(int[] data, int start, int len) { q]Qgg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i]$d3J3
} V7[qf "
} (Z,,H1L
} )cqhbR
} syZ-xE]}
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堆排序： yl'~H;su
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package org.rut.util.algorithm.support; 7OWiG,
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import org.rut.util.algorithm.SortUtil; ao-C9|2>NU
mG@Q}Y(
/** bY>o%LL-
* @author treeroot 2s{yg%U(
* @since 2006-2-2 R9CAw>s
* @version 1.0 CYrL|{M]
*/ _~cmR<
public class HeapSort implements SortUtil.Sort{ J)fS2Ni+
D9LwYftZ
/* (non-Javadoc) Xj/X.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g(5s{njL
*/ Dea;9O
public void sort(int[] data) { F'#3wCzt
MaxHeap h=new MaxHeap(); . t3@86xTJ
h.init(data); 2#!$f_
for(int i=0;i h.remove(); ADBw" ? >
System.arraycopy(h.queue,1,data,0,data.length); +bO{UC[
} 8Peqm?{5Y5
bm+ Mr
private static class MaxHeap{ DSjo%Brd-
q$t& *O_
void init(int[] data){ 0Hz3nd?v
this.queue=new int[data.length+1]; GS{9MGl
for(int i=0;i queue[++size]=data; Ti)n(G9$
fixUp(size); 0"QE,pLe4
} W"Rii]GK"
} O.$<Bf9
nu3 A'E`'k
private int size=0; Z?x]HB`r
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private int[] queue; WWO jyj
TRq~n7Y7C
public int get() { !c&^b@ yw
return queue[1]; (~OwO_|3
} d)G-K+&B
qe$K6A%Yd
public void remove() { ~T-.k 7t
SortUtil.swap(queue,1,size--); ji8Rd"S
fixDown(1); !.J~`Y'd_
} ;% !?dH6
file://fixdown ;dWqMnV
private void fixDown(int k) { Qxvz}r.l]
int j; QAJ>93
while ((j = k << 1) <= size) { @KpzxcEoO
if (j < size %26amp;%26amp; queue[j] j++; l1:j/[B=
if (queue[k]>queue[j]) file://不用交换 .6"7Xxe]<
break; an7N<-?
SortUtil.swap(queue,j,k); f@}(<#
k = j; o+t?OG/0
} M)xK+f2_[
} )b7mzDp(
private void fixUp(int k) { dG rA18
while (k > 1) { ='JX_U`A^F
int j = k >> 1; *= 71/&B
if (queue[j]>queue[k]) MJC Yi<D
break; }"8_$VDcz
SortUtil.swap(queue,j,k); UEeqk"t^
k = j; uJO*aA{K
} /Yh([P>
} Ya. $x~
u<8Q[_E&
} &qU[wn:1
:U*[s$
} fr?eOigbl
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SortUtil： %qQ(@TG
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package org.rut.util.algorithm; `WB|h)Y
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import org.rut.util.algorithm.support.BubbleSort; @bx2=
import org.rut.util.algorithm.support.HeapSort; m\>x_:sE
import org.rut.util.algorithm.support.ImprovedMergeSort; x -!FS h8q
import org.rut.util.algorithm.support.ImprovedQuickSort; ?gtkf[0B|
import org.rut.util.algorithm.support.InsertSort; fkG8,=
import org.rut.util.algorithm.support.MergeSort; ,J^Op
import org.rut.util.algorithm.support.QuickSort; .3&m:P8zV
import org.rut.util.algorithm.support.SelectionSort; ;H=6u
import org.rut.util.algorithm.support.ShellSort; 2ya`2 m
'KL(A-}!
/** (wfg84
* @author treeroot _e3'f:
* @since 2006-2-2 $!f$R`R^Q\
* @version 1.0 h$&XQq0T
*/ }rE|\p>
public class SortUtil { GEA;9TU|V
public final static int INSERT = 1; M($},xAvDU
public final static int BUBBLE = 2; O,{ (
public final static int SELECTION = 3; #J!? :(m:
public final static int SHELL = 4; O>GP>U?]
public final static int QUICK = 5; Rv-o__C!
public final static int IMPROVED_QUICK = 6; 39j d}]e
public final static int MERGE = 7; #r:`bQ0;
public final static int IMPROVED_MERGE = 8; rA`\we)
public final static int HEAP = 9; $ZU(bEUOG
H1[aNwLr
public static void sort(int[] data) { zi ,Rk.
sort(data, IMPROVED_QUICK); {P-PH$ E-
} a)1,/:7'
private static String[] name={ b {5|2&=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r2th6hl~
}; Lk9>7xY
IO#W#wW$M
private static Sort[] impl=new Sort[]{ @_Zx'mTI
new InsertSort(), 6`C27
new BubbleSort(), 7|-xM>L$A
new SelectionSort(), $ZRN#x@
new ShellSort(), >D<=9G(a
new QuickSort(), ;$QJnQ"R
new ImprovedQuickSort(), a{+oN $
new MergeSort(), v#|c.<].
new ImprovedMergeSort(), z aF0nov
new HeapSort() }WbN)
}; OK\%cq/U
co3 ,8\N0
public static String toString(int algorithm){ )9r%% #
return name[algorithm-1]; 1Q5<6*QL"
} dx}/#jMa
ry ?2 o!
public static void sort(int[] data, int algorithm) { @:&+wq_>A^
impl[algorithm-1].sort(data); O[y`'z;C
} ?/(K7>`
b-?o?}*
public static interface Sort { Z?.*.<"Sj
public void sort(int[] data); v+#j>
} dYd~9
WDdi}i>2
public static void swap(int[] data, int i, int j) { E/ZJ\@gzD
int temp = data; ]eW|}V7A:
data = data[j]; 1Ol]^'y7)
data[j] = temp; ugB{2oqi
} Y14R"*t~
} {1aAm+