[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; lKWr=k~
} a,n93-m(m
int i1=l; k[9A,N^lZB
int i2=mid+1; x=Mm6}/
for(int cur=l;cur<=r;cur++){ s;1e0n
if(i1==mid+1) z0Xa_w=
data[cur]=temp[i2++]; m*oc)x7'
else if(i2>r) rzu s
data[cur]=temp[i1++]; G),db%,X2
else if(temp[i1] data[cur]=temp[i1++]; Yy h=G
else [Oy >R
data[cur]=temp[i2++]; FT.@1/)
} Y<Q\d[3^F
} qq;b~ 3kW
zvr\36
} yX!#a>d"H
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改进后的归并排序: Rla4L`X;
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package org.rut.util.algorithm.support; v!trsjb
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import org.rut.util.algorithm.SortUtil; +< KNY
"}zda*z8
/** &fSTR-8ev#
* @author treeroot xl2g0?
* @since 2006-2-2 LgHJo-+>
* @version 1.0 d(S}NH
*/ 10MU-h.)
public class ImprovedMergeSort implements SortUtil.Sort { \hbiU]
|ym%| B
private static final int THRESHOLD = 10; tcA;#^jc
U3F3((EYJ
/* ^~l $&~
* (non-Javadoc) }-p,iTm
* 2-v\3voN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @^?XaU
*/ YwAnqAg
public void sort(int[] data) { kon=il<@
int[] temp=new int[data.length]; Ei~f`{i
mergeSort(data,temp,0,data.length-1); QlD6i-a
} ~lw<799F6
uRQ_'l
private void mergeSort(int[] data, int[] temp, int l, int r) { 5@P-g
int i, j, k; @ Nb%L&=P8
int mid = (l + r) / 2; s'L?;:)dyB
if (l == r) 'm O2t~n
return; LC-)'Z9}5
if ((mid - l) >= THRESHOLD) Y {c5
mergeSort(data, temp, l, mid); <xn;bp[
else A1A3~9HuK
insertSort(data, l, mid - l + 1); 5f{|"LG&
if ((r - mid) > THRESHOLD) 8Rxc&`_X
mergeSort(data, temp, mid + 1, r); #J$qa Ul
else M!{'ED
insertSort(data, mid + 1, r - mid); VJ{pN~_1
SI*^f\lu
for (i = l; i <= mid; i++) { <y>:B}9'
temp = data; )i!^]|$
} V8"Wpl9Cz
for (j = 1; j <= r - mid; j++) { %j{.0H
temp[r - j + 1] = data[j + mid]; :'*DMW~
} EXpSh}
int a = temp[l]; *^h_z;{,
int b = temp[r]; cwynd=^nC
for (i = l, j = r, k = l; k <= r; k++) { %EI<@Ps8c
if (a < b) { DU{bonR`
data[k] = temp[i++]; @ yxt($G
a = temp; xjq0D[
} else { VzwPBQ -
data[k] = temp[j--]; @2' %o<lF
b = temp[j]; (ZPXdr
} 7ZFJexN]
} o4)hxs
} TnE+[.Qu
/F~X,lm*~
/** +R[4\ hC0Y
* @param data yP\Up
* @param l ("Dv>&w9
* @param i ZBc|438[
*/ 8D~x\!(p\
private void insertSort(int[] data, int start, int len) { rt b*n~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k dU! kj
} @]'SeiNp
} g%\L&}Jd
} +Me2U9
} (@&I_>2Q
$']VQ4tZ
堆排序： 40K2uT{cq
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package org.rut.util.algorithm.support; (0jr;jv
#":a6%0Q
import org.rut.util.algorithm.SortUtil; zvf3b!}
[7W(NeMk
/** \&q=@rJp(z
* @author treeroot .3wY\W8Dr-
* @since 2006-2-2 o3h-=t
* @version 1.0 kx{!b3"
*/ q)iTn)Z!
public class HeapSort implements SortUtil.Sort{ X?dfcS*!n
'G#SLqZy
/* (non-Javadoc) E $6ejGw-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F?4Sz#
*/ ')o0O9/;
public void sort(int[] data) { xP@/9SM
MaxHeap h=new MaxHeap(); r nBOj#N
h.init(data); }uQ${]&D
for(int i=0;i h.remove(); Do;#NLrWb
System.arraycopy(h.queue,1,data,0,data.length); =nhzMU9c\y
} *Bw#c j
|:2c$zq
private static class MaxHeap{ jA`a/vWu
M|%c(K#E,3
void init(int[] data){ |.w;r
this.queue=new int[data.length+1]; arj$dAW
for(int i=0;i queue[++size]=data; Q}P-$X+/ n
fixUp(size); j Z'&0x"U
} - L~Uu^o
} ;CmOsA,1
!N~*EI$
private int size=0; nem@sB;v#
frH)_YJ%
private int[] queue; xzikD,FV
wkikD
public int get() { <t}?$1
return queue[1]; ]Oso#GYD
} >saI+u'o
GS%b=kc
public void remove() { dVGbe07
SortUtil.swap(queue,1,size--); #nEL~&
fixDown(1); \A(5;ZnuD
} 3k{ @.V?]
file://fixdown .#!mDlY;
private void fixDown(int k) { ,- HIFbXx@
int j; Yx1 D)
while ((j = k << 1) <= size) { RvW.@#EH0
if (j < size %26amp;%26amp; queue[j] j++; aZgNPw
if (queue[k]>queue[j]) file://不用交换 )w"0w(
break; yNva1I
SortUtil.swap(queue,j,k); (hf zM+2
k = j; AMTslo
} h5-d;RKE
} \cZfg%PN
private void fixUp(int k) { 8p=>?wG
while (k > 1) { f z%tA39m
int j = k >> 1; 3qo e^e
if (queue[j]>queue[k]) {A3m+_8
break; F]5\YYXO
SortUtil.swap(queue,j,k); Jsn <,4DO8
k = j; ]kS7n@8
} RWikJ
} `d*b]2
,!>fmU`E4
} a:u}d7T3e
]u=Ca#!'
} H8i+'5x,?
AZwa4n}"
SortUtil： ZQ[~*)
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package org.rut.util.algorithm; 8]C1K Zs
Yy@g9mi
import org.rut.util.algorithm.support.BubbleSort; `Zf9$K|
import org.rut.util.algorithm.support.HeapSort; &@; RI~
import org.rut.util.algorithm.support.ImprovedMergeSort; BXA]9eK
import org.rut.util.algorithm.support.ImprovedQuickSort; _?b;0{93u
import org.rut.util.algorithm.support.InsertSort; $4Y&j}R
import org.rut.util.algorithm.support.MergeSort; l* Y[^'
import org.rut.util.algorithm.support.QuickSort; |<Bpv{]P
import org.rut.util.algorithm.support.SelectionSort; -S$$/sR
import org.rut.util.algorithm.support.ShellSort; ,}<RrUfD
76cEKHa<
/** -+P7:4/
* @author treeroot .)`-Hkxa
* @since 2006-2-2 F< |c4
* @version 1.0 *?N<S$m
*/ <E}N=J'uJ
public class SortUtil { )ddsyFGW
public final static int INSERT = 1; P6we(I`"2
public final static int BUBBLE = 2; +*a7GttU
public final static int SELECTION = 3; IJIQ" s
public final static int SHELL = 4; o?dR\cxj
public final static int QUICK = 5; la702)N{
public final static int IMPROVED_QUICK = 6; PP-kz;|
public final static int MERGE = 7; xt))]aH
public final static int IMPROVED_MERGE = 8; kY!C_kFcn
public final static int HEAP = 9; i4VK{G~g"
$e1:Q#den2
public static void sort(int[] data) { V6+Zh>'S
sort(data, IMPROVED_QUICK); w_H2gaQ
} 3{pk5_c
private static String[] name={ x@Vt[}e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (UcFNeo
}; tgW kX
/e<5Np\X
private static Sort[] impl=new Sort[]{ 0||F`24
new InsertSort(), b,Lw7MY}[
new BubbleSort(), kW(Kh0x
new SelectionSort(), A'~#9@l<
new ShellSort(), kaO{#i2-
new QuickSort(), yoW> BX
new ImprovedQuickSort(), 5)*6V&
new MergeSort(), -fPT}v
new ImprovedMergeSort(), e YDUon
new HeapSort() -yA3 RP
}; M[z3 f
xgs@gw7!n0
public static String toString(int algorithm){ yjd(UWE
return name[algorithm-1]; YZ\@)D;
} 0etwz3NuW
nNs .,J)
public static void sort(int[] data, int algorithm) { [`9^QEj
impl[algorithm-1].sort(data); *;X-\6
} `sxN!Jj?
pz @km
public static interface Sort { 1M/$< kQ-N
public void sort(int[] data); tQ[]Rc
} X~zRZ0
x~Cz?ljbn
public static void swap(int[] data, int i, int j) { Um'Ro4
int temp = data; q_pmwJ:UL
data = data[j]; 0Jg+sUs{
data[j] = temp; .FJj
} !l"tI#?6W%
} f?5A"-NS