[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; O=m_P}K
} p)2 !_0
int i1=l; *9Ta0e*
int i2=mid+1; qw?#~"Ca.
for(int cur=l;cur<=r;cur++){ Ya~*e;CW2
if(i1==mid+1) t~_vzG
data[cur]=temp[i2++]; n@%Q 2_
else if(i2>r) Uao8#<CkvJ
data[cur]=temp[i1++]; X?'ShXI
else if(temp[i1] data[cur]=temp[i1++]; 8G3CQ]G
else K!~j}z*
data[cur]=temp[i2++]; ]6s7?07m4
} 8k[=$Ro
} 5\!t!FL_
"- 2HKs
} 8`g@ )]Iy
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改进后的归并排序: -%f$$7
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package org.rut.util.algorithm.support; ]cQYSN7!SY
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import org.rut.util.algorithm.SortUtil; py|ORVN(Z
X 8/9x-E_
/** ??5y0I6+
* @author treeroot a%nksuP3
* @since 2006-2-2 dlv1liSXL5
* @version 1.0 Q' b@5o
*/ )\aCeY8o
public class ImprovedMergeSort implements SortUtil.Sort { 6&9}M Oc
E^s<5BC;
private static final int THRESHOLD = 10; Kx4_`;>
OkNBP0e}
/* U~CG(9
* (non-Javadoc) mv,p*0
* jK(]eiR$S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]#NJ[IZb
*/ p[LPi5
public void sort(int[] data) { !#[B#DZc(
int[] temp=new int[data.length]; I@/s&$H`l
mergeSort(data,temp,0,data.length-1); f[ 'uka.U
} |7#S0Ca@
q 3nF\Me0
private void mergeSort(int[] data, int[] temp, int l, int r) { C<B+!16
int i, j, k; w. c]
int mid = (l + r) / 2; ?y/LMja
if (l == r) DS|HN
return; [,a2A
if ((mid - l) >= THRESHOLD) R3bHX%T
mergeSort(data, temp, l, mid); q?##S'
else bC h
insertSort(data, l, mid - l + 1); <rn26Gfr
if ((r - mid) > THRESHOLD) CT0 ~
mergeSort(data, temp, mid + 1, r); vT=?UTq
else KD=W(\
insertSort(data, mid + 1, r - mid); /^pPT6
.,*68S0k7
for (i = l; i <= mid; i++) { S x0QPX
temp = data; qP5'&!s&!
} &;2@*#,
for (j = 1; j <= r - mid; j++) { yx\I&\i
temp[r - j + 1] = data[j + mid]; y#iQ
} elDt!9Pu
int a = temp[l]; b haYbiX?
int b = temp[r]; 78UE?) X"
for (i = l, j = r, k = l; k <= r; k++) { @b3jO
if (a < b) { b[Qe} `W
data[k] = temp[i++]; %] #XIr
a = temp; o,gH*
} else { |r<#>~*
data[k] = temp[j--]; G$oi>zt3
b = temp[j]; }UzRFIcv
} \r`><d
} vrX@T?>
} &|YJ?},
cVf}8qf)
/** HP(dhsd<c
* @param data hM "6-60
* @param l zI{~;`tzN
* @param i E(-@F%Q
*/ UAEu.AT
private void insertSort(int[] data, int start, int len) { Ba#wW E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :lE_hY
} VdOcKP.
} hF^y4v|5
} BN%;AQV
} l|j}Ggen
%U?1Gf e
堆排序： @;t6Slc"~
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package org.rut.util.algorithm.support; 0WI@BSHnM
(~N[j;W,_W
import org.rut.util.algorithm.SortUtil; W|CZA
C @nA*
/** ^_c6Op<F
* @author treeroot yvIzgwN%s!
* @since 2006-2-2 UUR+PfY
* @version 1.0 wCgi@\
*/ +x]3 -s
public class HeapSort implements SortUtil.Sort{ .D{He9
o2rL&
/* (non-Javadoc) d#1yVdqRl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sd&^lpH
*/ KdXqW0nm
public void sort(int[] data) { N~|Z@pU"
MaxHeap h=new MaxHeap(); {1;R&
h.init(data); `6xr:s
for(int i=0;i h.remove(); G\(cnqHk
System.arraycopy(h.queue,1,data,0,data.length); BcxALRWE
} b_Dd$NC
e+<'=_x {
private static class MaxHeap{ <j}A=SDZ)
W<u,S
void init(int[] data){ d1';d6.u\
this.queue=new int[data.length+1]; YkSHJ{>
for(int i=0;i queue[++size]=data; Q<>b3X>O
fixUp(size); l i) 5o
} 5m2f\^U
} W1_.wN$,5
Zo<j"FG
private int size=0; xmi@ XL@t
4'5|YGQj
private int[] queue; <,*3Av
Z;y(D_;_
public int get() { $38)_{
return queue[1]; L;-V Yo#
} qLV3Y?S!L
IU;a$
public void remove() { G8&/Ic
SortUtil.swap(queue,1,size--); s_}`TejK
fixDown(1); ' eh }t
} .(99f#2M:
file://fixdown qTSe_Re
private void fixDown(int k) { {H*
int j; tb4^+&.GS
while ((j = k << 1) <= size) { [2PPa9F
if (j < size %26amp;%26amp; queue[j] j++; Ab6R?mUM
if (queue[k]>queue[j]) file://不用交换 82iFk`)T
break; U$46=F|
SortUtil.swap(queue,j,k); E=Vp%08(
k = j; [RF6mWQ
} k [LV^oEg
} 7,zE?KG /
private void fixUp(int k) { ~=Q^]y,
while (k > 1) { [ ebk u_
int j = k >> 1; 2u$rloc$b
if (queue[j]>queue[k]) &M:o(T
break; aS``fE;O
SortUtil.swap(queue,j,k); ~1{ppc+
k = j; 7"F29\
} 3W%j^nM
} w+wtr[;wwL
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} fW[ .Q0
!ewT#afyu(
} 5+Ao.3Xn
0*_E'0L8e
SortUtil： )KEW`BC5T
&isKU8n
package org.rut.util.algorithm; ,Ha<lU2K
f!#+cM
import org.rut.util.algorithm.support.BubbleSort; :yRv:`r3Lt
import org.rut.util.algorithm.support.HeapSort; =^SxZ Bn
import org.rut.util.algorithm.support.ImprovedMergeSort; S+#|j
import org.rut.util.algorithm.support.ImprovedQuickSort; (k8}9[3G
import org.rut.util.algorithm.support.InsertSort; Z #T
import org.rut.util.algorithm.support.MergeSort; 3)OQgeKU
import org.rut.util.algorithm.support.QuickSort; ]x{.qTtw
import org.rut.util.algorithm.support.SelectionSort; ({Pjz;xM
import org.rut.util.algorithm.support.ShellSort; <#RVA{
x FWhr#5,
/** Svb>s|D
* @author treeroot gq"d$Xh$x7
* @since 2006-2-2 #y[U2s Se
* @version 1.0 !-.GfI:q
*/ {0j_.XZ
public class SortUtil { O=;jDWE
public final static int INSERT = 1; @Ns[qn;9
public final static int BUBBLE = 2; Zazff@O *
public final static int SELECTION = 3; 7YR|6{@
public final static int SHELL = 4; n_3R Q6
public final static int QUICK = 5; DzQ
public final static int IMPROVED_QUICK = 6; &w#!
public final static int MERGE = 7; o<G#%9j
public final static int IMPROVED_MERGE = 8; 4l+!Z,b
public final static int HEAP = 9; NcP/W>lN
'3Lu_]I-
public static void sort(int[] data) { 5nUJ9sqA
sort(data, IMPROVED_QUICK); >mai v;
} h693TS_N
private static String[] name={ Qr9;CVW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6,aH[>W
}; xH xTL>,?
fEX=csZ86
private static Sort[] impl=new Sort[]{ ])o{!}QUl\
new InsertSort(), aL( hWE
new BubbleSort(), QYboX~g~p
new SelectionSort(), 0z8?6~M;<
new ShellSort(), w y|^=#k
new QuickSort(), 8HQ.MXKP
new ImprovedQuickSort(), PDuc;RG
new MergeSort(), )63 $,y-;$
new ImprovedMergeSort(), t/\
new HeapSort() @M]_],
}; 80Dn!9j*
MQQm3VaKS
public static String toString(int algorithm){ Lr:Qc#2
return name[algorithm-1]; yGdX>h
} h6Z:+
MLu!8dgI
public static void sort(int[] data, int algorithm) { G aV&y
impl[algorithm-1].sort(data); ;:fW]5"R
} -GAF>
(-21h0N[V
public static interface Sort { TI4Hu,rc
public void sort(int[] data); x#J9GP.
} #$I@V4O;#
->8Kd1^F
public static void swap(int[] data, int i, int j) { P.'.KZJ:WD
int temp = data; mb1mlsE
data = data[j]; GtVT^u_
data[j] = temp; m&:&z7^p
} Aqmpo3P[+
} v;x0=I&%