[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; s}z,{Y$-t
} X!2|_
int i1=l; E?9_i :IX
int i2=mid+1; 1MahFeQ[
for(int cur=l;cur<=r;cur++){ vq5I 2
if(i1==mid+1) xrX("ili
data[cur]=temp[i2++]; O4E2)N
else if(i2>r) |@ldXuYb
data[cur]=temp[i1++]; ]@8=e'V
else if(temp[i1] data[cur]=temp[i1++]; hYWWvJ)S
else T=R94
data[cur]=temp[i2++]; I^ >zr.zA
} -+PPz?0
} c''O+,L1+
CqX%V":2
} aZ0H)
d.}rn"(z
改进后的归并排序: 8U(a&G6gn
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package org.rut.util.algorithm.support; unX^MPpw
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import org.rut.util.algorithm.SortUtil; hT]p8m aRZ
M^[jA](a
/** qt:->yiq+
* @author treeroot Wey\GQ`"8
* @since 2006-2-2 _$cBI_eA7
* @version 1.0 HkV/+ {;S~
*/ KJ#c(yb9zR
public class ImprovedMergeSort implements SortUtil.Sort { 8n:D#`K
5Y&@ :Y
private static final int THRESHOLD = 10; xeH#)QJt
l|fd,
/* A+}4N%kh
* (non-Javadoc) *FE<'+%
* [ho'Pc3A<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XM 7zA^-
*/ WcJ{}V9
public void sort(int[] data) { tV,zz;* Oe
int[] temp=new int[data.length]; /<2_K4(-{4
mergeSort(data,temp,0,data.length-1); 0iB1_)~
} tQ|I$5jNJ
mzw*6e2T
private void mergeSort(int[] data, int[] temp, int l, int r) { 6\Z^L1973
int i, j, k; n^%u9H
int mid = (l + r) / 2; vJ'ho
if (l == r) ~k%\ LZ3s
return; b7,qzh
if ((mid - l) >= THRESHOLD) 0IdD
mergeSort(data, temp, l, mid); {Eb6.
else Iymz2
insertSort(data, l, mid - l + 1); evR=Z\ _
if ((r - mid) > THRESHOLD) W6iIL:sp
mergeSort(data, temp, mid + 1, r); GkC88l9z
else S-H3UND"
insertSort(data, mid + 1, r - mid); W!(Q_B
Xm-63U`w5
for (i = l; i <= mid; i++) { zKutx6=aj
temp = data; hf-S6PEsM
} ,]Ma,2
for (j = 1; j <= r - mid; j++) { dkLR Q
temp[r - j + 1] = data[j + mid]; *,pqpD>
} h`Mf;'P
int a = temp[l]; xVe!
int b = temp[r]; CP'-CQ\Q
for (i = l, j = r, k = l; k <= r; k++) { 7.t$#fzi
if (a < b) { wf4Q}l2,d
data[k] = temp[i++]; F)IP~BE-k
a = temp; Uoe?5Of(*
} else { A^7!+1*K+
data[k] = temp[j--]; 6{~I7!m"
b = temp[j]; f1{ckHAY55
} DIRCP=5
} <f6Oj`{f4
} O`=Uq0Vv
FdqUv%(Em
/** k?#6j1pn
* @param data ]5\vYk
* @param l ;:4puv+]
* @param i GND[f}
*/ g;h&Xkp
private void insertSort(int[] data, int start, int len) { 9T1G/0k-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0d2%CsMS"D
} tFQFpbI
} $3ILVT
} 1:t>}[Y
} Bz{ g4!ku
/b|sv$BN
堆排序： xpk|?/6
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package org.rut.util.algorithm.support; i&$uG[&P
#o RUH8
import org.rut.util.algorithm.SortUtil; Sf8d|R@O
E(8g(?4
/** 1 W u
* @author treeroot SMyg=B\x?7
* @since 2006-2-2 1dcy+ !>
* @version 1.0 MlZ`g,{
*/ cOQy|v`KD,
public class HeapSort implements SortUtil.Sort{ 9?8`"v
3^Zi/r
/* (non-Javadoc) ?q P}=nJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dq(x@&J
*/ H.L@]~AyL
public void sort(int[] data) { `{Jb{L@f
MaxHeap h=new MaxHeap(); 0FOf *Lz
h.init(data); ?MH4<7?"
for(int i=0;i h.remove(); )YFs
System.arraycopy(h.queue,1,data,0,data.length); 1GdD
} Q Y'-]
I,eyL$x
private static class MaxHeap{ DtZm|~)a
q1y4B`
void init(int[] data){ "ivqh{ ,
this.queue=new int[data.length+1]; l+6(|"md
for(int i=0;i queue[++size]=data; 0pFHE>
fixUp(size); +mQSlEo
} pQNFH)=nw
} o__q)"^~-
L ~w=O!
private int size=0; 6{'6_4;Fv(
2XHk}M|
private int[] queue; ja/[PHq"
?=kswf
public int get() { *-_Npu6
return queue[1]; Qx;A; n!lw
} 7o. 'F
3U)8P6Fz
public void remove() { "tM/`:Qp
SortUtil.swap(queue,1,size--); Be+:-t)
fixDown(1); \0h/~3
} dI-5%Um
file://fixdown YkX=n{^
private void fixDown(int k) { zwtsw[.
int j; ]B4mm__
while ((j = k << 1) <= size) { w>uZ$/
if (j < size %26amp;%26amp; queue[j] j++; >{a,]q*
if (queue[k]>queue[j]) file://不用交换 p( *3U[1
break; Q8?D}h
SortUtil.swap(queue,j,k); cqx1NWlY
k = j; }=a4uCE
} `Ny8u")=
} 1 1CJT
private void fixUp(int k) { s?k[_|)!
while (k > 1) { "44?n <1
int j = k >> 1; &J$5+"/;X
if (queue[j]>queue[k]) Wi^rnr'Ss
break; I?>T"nV +'
SortUtil.swap(queue,j,k); )\vHIXnfJ1
k = j; {R;M`EU>
} yU,xcq~l
} p'~5[JR:
31& .Lnq
} u9w&q^0dqG
Kdu\`c-lB
} 8F`
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SortUtil： P*`xiTA
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package org.rut.util.algorithm; .E#Sm?gK
5Q`n6x|
import org.rut.util.algorithm.support.BubbleSort; (JW?azU
import org.rut.util.algorithm.support.HeapSort; -P>=WZu
import org.rut.util.algorithm.support.ImprovedMergeSort; :-La $I>
import org.rut.util.algorithm.support.ImprovedQuickSort; fhKiG%i'l
import org.rut.util.algorithm.support.InsertSort; .To:tN#
import org.rut.util.algorithm.support.MergeSort; <C;>$kX
import org.rut.util.algorithm.support.QuickSort; sdYj'e:N
import org.rut.util.algorithm.support.SelectionSort; e oSM@Isu
import org.rut.util.algorithm.support.ShellSort; :)95 b fa.
mwH!:f
/** x9l0UD*+g
* @author treeroot mo[<4Uks
* @since 2006-2-2 2F@)nh
* @version 1.0 xc.D!Iav
*/ 9ox|.68q
public class SortUtil { Wxau]uix
public final static int INSERT = 1; [P=[hj;
public final static int BUBBLE = 2; o!`O i5
public final static int SELECTION = 3; ><Z3<7K9
public final static int SHELL = 4; n~u3
public final static int QUICK = 5; J+jmSK%z
public final static int IMPROVED_QUICK = 6; Cfo 8gX*
public final static int MERGE = 7; Lo5@zNt%W
public final static int IMPROVED_MERGE = 8; y[6&46r7D
public final static int HEAP = 9; 1Dp@n
_G #"B{7
public static void sort(int[] data) { ;+34g6
sort(data, IMPROVED_QUICK); ^z}lGu
} ~49N
private static String[] name={ /I'u/{KB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S?\hbM]V-o
}; Y{vwOs
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private static Sort[] impl=new Sort[]{ r/hyW6e_
new InsertSort(), cO+Xzd;838
new BubbleSort(), V<ApHb
new SelectionSort(), fGf-fh;s
new ShellSort(), ikN!ut
new QuickSort(), 8<g#$(a_E
new ImprovedQuickSort(), exO#>th1
new MergeSort(), [[]SkLZHg
new ImprovedMergeSort(), G].__]
new HeapSort() gT&'i(c
}; #z!Hb&Qi\
RB7AI!'a?
public static String toString(int algorithm){ 4bev*[k
return name[algorithm-1]; $KWYe{#
} kgapTv>q
z<%g #bo
public static void sort(int[] data, int algorithm) { w&yGYHg
impl[algorithm-1].sort(data); :q64K?X
} rp @
RF~Ofi
public static interface Sort { ^qGA!_
public void sort(int[] data); X";ZUp
} E<Dh_K
bLEATT[
public static void swap(int[] data, int i, int j) { _gm?FxV:
int temp = data; n<<=sj$\!
data = data[j]; )w2K&Zr0
data[j] = temp; +6hl@Fm(
} .^~l_LkA
} u}}9j&^Xa