[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; > :IWRc2
} NOuG#P
int i1=l; D**GC
int i2=mid+1; 7P7OTN
for(int cur=l;cur<=r;cur++){ EP 4]#]5
if(i1==mid+1) {@^;Nw%J
data[cur]=temp[i2++]; B+j]C$8}
else if(i2>r) Z(T{K\)uN
data[cur]=temp[i1++]; RHg-Cg`
else if(temp[i1] data[cur]=temp[i1++]; . \"k49M`
else `(sb
data[cur]=temp[i2++]; R<Lf>p>_
} `daqzn
} wOl?(w=|
WXl+w7jr
} )&Oc7\J,
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改进后的归并排序: >w@+cUto
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package org.rut.util.algorithm.support; t82'K@sq
lGl'A}]#$
import org.rut.util.algorithm.SortUtil; OegeZV
~0a5
/** 6(Pan%
* @author treeroot i(^U<DW$
* @since 2006-2-2 b.&WW
* @version 1.0 rtRbr_
*/ S3E,0%yo+)
public class ImprovedMergeSort implements SortUtil.Sort { Z[oEW>_A
7{L4a\JzT
private static final int THRESHOLD = 10; T)rE#"_]{
DPTk5o[
/* .$%p0Yx+
* (non-Javadoc) ,erf{"Nh
* 0jf6 z-4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \ ;npdFy
*/ :oP LluW*
public void sort(int[] data) { :TH cI;PG8
int[] temp=new int[data.length]; 2}r=DAe0
mergeSort(data,temp,0,data.length-1); <EpL<K%
} rp||#v0l!w
50W+!'
private void mergeSort(int[] data, int[] temp, int l, int r) { ["Ltqgx
int i, j, k; 2T~cOH;T
int mid = (l + r) / 2; ?pTX4a&>
if (l == r) $zMshLT
return; mll:rWC)
if ((mid - l) >= THRESHOLD) sjr,)|#[
mergeSort(data, temp, l, mid); ;uUFgDi
else :8A+2ra&
insertSort(data, l, mid - l + 1); Ey&H?OFiP
if ((r - mid) > THRESHOLD) elOeXYO0
mergeSort(data, temp, mid + 1, r); G%<}TI1}
else Nr~$i%[
insertSort(data, mid + 1, r - mid); N{;!xIv
;sZG=y@
for (i = l; i <= mid; i++) { Gt9$hB7
temp = data; 2 |s ohF
} (^d7K:-'
for (j = 1; j <= r - mid; j++) { Je1d|1!3
temp[r - j + 1] = data[j + mid]; bbK};u
} @ _Ey"k<
int a = temp[l]; <'a~Y3B"o
int b = temp[r]; ,,'jyqD
for (i = l, j = r, k = l; k <= r; k++) { H}^'
if (a < b) { +I3jI <
data[k] = temp[i++]; :v&[!
a = temp; \<4N'|:
} else { e1m?g&[
data[k] = temp[j--]; cO~<iy
b = temp[j]; Z!1D4`w
} 1-KNXGb'
} KA5)]UF`l
} 9DxHdpOk
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/** CLR1CGnn7
* @param data O VV@
* @param l Rh!UbEPjC
* @param i Ms{";qiG
*/ (vs<Fo|]
private void insertSort(int[] data, int start, int len) { N:1aDr;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Kg[OUBv
} 'wND
} %tCv-aX4
} RgJ@J/p"
} [XfR`@
U v2.Jo/Q
堆排序： -+#%]P8l
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package org.rut.util.algorithm.support; Gm=qn]c
ZZw`8 E
import org.rut.util.algorithm.SortUtil; -Zt!H%U
{Su?*M2y
/** N9e'jM>Oos
* @author treeroot "TV'}HH
* @since 2006-2-2 &`"DG$N(
* @version 1.0 $*yYmF
*/ diq}\'f
public class HeapSort implements SortUtil.Sort{ D'" T'@
51#*8u+L
/* (non-Javadoc) $ V^gFes
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SK<Rk
*/ n ~t{]if"
public void sort(int[] data) { t un}rdb
MaxHeap h=new MaxHeap(); Ot=jwvw
h.init(data); #@XBHJD\#
for(int i=0;i h.remove(); l& :EKh
System.arraycopy(h.queue,1,data,0,data.length); tcD7OC:"6
} ;FPx
DJP6Z
private static class MaxHeap{ i]JTKL{\q
]P4WfV d
void init(int[] data){ Kb.qv)6i*
this.queue=new int[data.length+1]; D!<F^mtl
for(int i=0;i queue[++size]=data; wu41Mz7
fixUp(size); vwCQvt
} L.Y3/H_
} 8Sbz)X
[);oj<
private int size=0; DiCz%'N
H?$dnwR
private int[] queue; xEb>6+-F@
B=_w9iVN
public int get() { o`U}uqrO
return queue[1]; ZlT }cA/n
} pu-HEv}]a|
eV;r /4
public void remove() { th?+TNb^
SortUtil.swap(queue,1,size--); 9^gYy&+>6]
fixDown(1); E C?}iP
} BZq#OAp
file://fixdown ^QK`z@B
private void fixDown(int k) { twT/uBQ4a
int j; -'rdN i
while ((j = k << 1) <= size) { X+hHEkJ
if (j < size %26amp;%26amp; queue[j] j++; Z%t_1t
if (queue[k]>queue[j]) file://不用交换 6FUW^dt
break; YEL0h0gn
SortUtil.swap(queue,j,k); })g<I+]Hf9
k = j; W5*ldXXk
} 5{c;I<0
} %xt9k9=vZ
private void fixUp(int k) { "TZq")-
while (k > 1) { (lk9](;L
int j = k >> 1; TCr4-"`r-{
if (queue[j]>queue[k]) fr17|#L+s
break; ( }-*irSsj
SortUtil.swap(queue,j,k); HiCh:IP7>/
k = j; _&<n'fK[
} ]#tB[G
} L9GLjRp-
GkGiQf4hh
} F%OP,>zl
Y(Q 0m|3P
} >O'\ jp}$l
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SortUtil： d&AG~,&d|
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package org.rut.util.algorithm; *PJH&g#Ge
ZU4=&K
import org.rut.util.algorithm.support.BubbleSort; bA;OphO(
import org.rut.util.algorithm.support.HeapSort; X! d-"[
import org.rut.util.algorithm.support.ImprovedMergeSort; Gh;\"Qx
import org.rut.util.algorithm.support.ImprovedQuickSort; l;?:}\sI=
import org.rut.util.algorithm.support.InsertSort; pUIN`ya[[
import org.rut.util.algorithm.support.MergeSort; Q(|@&83].
import org.rut.util.algorithm.support.QuickSort; A8{jEJ=)P
import org.rut.util.algorithm.support.SelectionSort; ZmA}i`
import org.rut.util.algorithm.support.ShellSort; 1w,_D.1'
c<lp<{;
/** RS5<] dy
* @author treeroot f:o.[4p2
* @since 2006-2-2 ~_THvx1
* @version 1.0 M2$/x`\-~
*/ u$ts>Q;5
public class SortUtil { aLk3Yg@X
public final static int INSERT = 1; b<h((]Q>^
public final static int BUBBLE = 2; 4:/]Y=)x
public final static int SELECTION = 3; V!}I$JiJ
public final static int SHELL = 4; Y}~sTuWU
public final static int QUICK = 5; >xWS>
public final static int IMPROVED_QUICK = 6; -@v^. @[Z&
public final static int MERGE = 7; iZGbNN
public final static int IMPROVED_MERGE = 8; u 3WU0Z`
public final static int HEAP = 9; {X!vb
eG=d)`.JaV
public static void sort(int[] data) { P,v7twc0M
sort(data, IMPROVED_QUICK); r!r08yf
} xfk -Ezv
private static String[] name={ Yuv(4a<M%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tXE/aY*I
}; dOjly,!
pF;.nt)
private static Sort[] impl=new Sort[]{ b 74!Zw
new InsertSort(), ;-db/$O
new BubbleSort(), U[]yN.J
new SelectionSort(), x]^d'o:cDP
new ShellSort(), /s?%ft#-9o
new QuickSort(), 7@ym:6Y+]
new ImprovedQuickSort(), @iz Onc:
new MergeSort(), fu7x,b0p
new ImprovedMergeSort(), 7nt(Rtbsu
new HeapSort() I|X`9
}; `bP`.Wm
<ZC.9
public static String toString(int algorithm){ Kz'GAm\
return name[algorithm-1]; ?QP>rm
} YwVA].p@TI
Xo PJ?63
public static void sort(int[] data, int algorithm) { vo/x`F'ib
impl[algorithm-1].sort(data); pY&6p~\p
} 3u@,OE
#}A"yo
public static interface Sort { ~WrpJjI[
public void sort(int[] data); pte\1q[N
} q<}IO
h#1:ypA6l
public static void swap(int[] data, int i, int j) { [^"}jbn/
int temp = data; =?]`Xo,v~
data = data[j]; ,Yag! i>;
data[j] = temp; RDps{),E;d
} k>i88^kPV
} Fe8X@63