[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; @gbW:
} IV!`~\@
int i1=l; Wcc4/:`Hu
int i2=mid+1; OQfFS+6
for(int cur=l;cur<=r;cur++){ T8Mqu`$r
if(i1==mid+1) c*7|>7C$i
data[cur]=temp[i2++]; G=[<KtWa
else if(i2>r) n=4
data[cur]=temp[i1++]; pTi7Xy!Cw
else if(temp[i1] data[cur]=temp[i1++]; 9tv,,I;iU
else bwhH2^ !
data[cur]=temp[i2++]; "[P3b"=gW
} MG=8`J-`
} O'IU1sU
0sU*3r?
} :8eI_X
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改进后的归并排序: B(1-u!pz
O6/ vFEB
package org.rut.util.algorithm.support; E"VFBKB
rxX4Cw]\"y
import org.rut.util.algorithm.SortUtil; hsrf2Xw[
^?H|RAp
/** >w<w*pC
* @author treeroot U!-Nx9
* @since 2006-2-2 E\DA3lq
* @version 1.0 :0B 7lDw
*/ )aGSZ1`/
public class ImprovedMergeSort implements SortUtil.Sort { wHs1ge(
ws9IO ?|&G
private static final int THRESHOLD = 10; X uE: dL?
1|4,jm$
/* 3%5YUG@
* (non-Javadoc) (eU4{X7
* xE@/8h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) So!=uYX
*/ 2`riI*fQ
public void sort(int[] data) { TMMJ5\t2
int[] temp=new int[data.length]; N8pL2y:R[P
mergeSort(data,temp,0,data.length-1); \mh #MMp
} :p}8#rb
8 5ET$YV
private void mergeSort(int[] data, int[] temp, int l, int r) { tXtNK2-1
int i, j, k; ?110} [jw
int mid = (l + r) / 2; f0SrPc v
if (l == r) bD,X.
return; Jf?6y~X>Y
if ((mid - l) >= THRESHOLD) O%kUj&h^
mergeSort(data, temp, l, mid); J6s]vV q"
else -ymDRoi
insertSort(data, l, mid - l + 1); -MS#YcsV
if ((r - mid) > THRESHOLD) ]87BP%G
mergeSort(data, temp, mid + 1, r); =W3 K6w
else rWL;pM<
insertSort(data, mid + 1, r - mid); MBg[hu%
!5lV#w!vb
for (i = l; i <= mid; i++) { M]r?m@)
temp = data; =w+8q1!o
} :K^J bQ
for (j = 1; j <= r - mid; j++) { V2}\]x'1
temp[r - j + 1] = data[j + mid]; PhC3F4
} HQm_ K0$
int a = temp[l]; ?MRY*[$
int b = temp[r]; p}JOiiHa
for (i = l, j = r, k = l; k <= r; k++) { I<940PZ
if (a < b) { Su,:f_If,
data[k] = temp[i++]; PX|@D_%Y=
a = temp; @p*)^D6E\
} else { <v0`r2^S{-
data[k] = temp[j--]; RX>P-vp
b = temp[j]; 0uDDaFS
} #gV n7wq
} I2*rtVAP'j
} * HKu%g
%nY\"
/** Pt"H_SW~k
* @param data 'M>m$cCMZ
* @param l aq$ hE-{28
* @param i :/|"db&`
*/ RA[j=RxK
private void insertSort(int[] data, int start, int len) { swF{}S"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t6nRg
} P'U2hCif
} 5&n{QE?Um
} !}TsFa
} kh0cJE\_^
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堆排序： EpAgKzVpJ
Z71m(//*}
package org.rut.util.algorithm.support; e7U\gtZ.
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import org.rut.util.algorithm.SortUtil; qazA,|L!
7_i8'(``
/** Kb?{^\FiU
* @author treeroot ~'_cBJ 'XD
* @since 2006-2-2 ;yJ:W8U]+;
* @version 1.0 uMg\s\Z
*/ d5m-f/
public class HeapSort implements SortUtil.Sort{ k|)fl l
?A3L8^tR
/* (non-Javadoc) %rptI$^*X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _f[Q\gK
*/ XH!#_jy
public void sort(int[] data) { Q|AZv>'!
MaxHeap h=new MaxHeap(); ~(d {j}M>
h.init(data); kMQ /9~
for(int i=0;i h.remove(); d<a|dwAeh
System.arraycopy(h.queue,1,data,0,data.length); 2 kDsIEA
} `}PYltW
7s(tAbPdB
private static class MaxHeap{ 92DM1~ *
ss)x fG
void init(int[] data){ f4f2xe7\Q
this.queue=new int[data.length+1]; R_PF*q2 '
for(int i=0;i queue[++size]=data; 5Kg'&B (
fixUp(size); @oAz
} SB\%"nnV
} jn2=)KBa_
A"V mxP
private int size=0; >7>I1
y+(\:;y$7
private int[] queue; k]@]a
A;TP~xq\
public int get() { Nwi|>'\C
return queue[1]; yn62NyK
} lgOAc,
_>- D*l
public void remove() { (9'^T.J
SortUtil.swap(queue,1,size--); 7{|QkTgC
fixDown(1); So aqmY;+
} Op'a=4x]
file://fixdown H-kX-7C
private void fixDown(int k) { $`F9e5}G
int j; UPh#YV 0/,
while ((j = k << 1) <= size) { bU! v
if (j < size %26amp;%26amp; queue[j] j++; cl~Yx4
if (queue[k]>queue[j]) file://不用交换 n"(!v7YNp
break; UD.bb
SortUtil.swap(queue,j,k); )j_El ]?
k = j; c2npma]DZ
} \fA{sehdL
} +<7Oj s>o
private void fixUp(int k) { ^po@U"
while (k > 1) { WTvUz.Et
int j = k >> 1; wX,V:QE
if (queue[j]>queue[k]) "7B}hZ^)W
break; g$nS6w|5H
SortUtil.swap(queue,j,k); bNea5u##
k = j; |YJ83nSO~
} A lU^,X
} Y %JQ
Wc3z7xK1@
} Gt`7i(
m@4Dz|
} y?$DDD
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SortUtil： y0* rY
b^1QyX^?:
package org.rut.util.algorithm; d ]P~
D|;O9iks#
import org.rut.util.algorithm.support.BubbleSort; 2{OR#v~
import org.rut.util.algorithm.support.HeapSort; f9De!"*&
import org.rut.util.algorithm.support.ImprovedMergeSort; u!_l/'\
import org.rut.util.algorithm.support.ImprovedQuickSort; ]{>AU^=U
import org.rut.util.algorithm.support.InsertSort; V`V\/sgj
import org.rut.util.algorithm.support.MergeSort; xUo6~9s7
import org.rut.util.algorithm.support.QuickSort; gAqK)@8-
import org.rut.util.algorithm.support.SelectionSort; a"8[,A3
import org.rut.util.algorithm.support.ShellSort; 'sNZFB#
u8e_Lqx?
/** GkIE;7#2kX
* @author treeroot n,la<N]
* @since 2006-2-2 So:X!ljN(e
* @version 1.0 <hT\xBb:
*/ \-<BUG]=
public class SortUtil { t [QD#;
public final static int INSERT = 1; [oWkd_dK
public final static int BUBBLE = 2; q76POytV|
public final static int SELECTION = 3; ;*K4{wvG
public final static int SHELL = 4; 1Pf(.&/9_
public final static int QUICK = 5; "kg`TJf=
public final static int IMPROVED_QUICK = 6; O*yxOb*
public final static int MERGE = 7; V\~.
public final static int IMPROVED_MERGE = 8; yNu_>!Cp5
public final static int HEAP = 9; yMs!6c*
h8rW"8Th
public static void sort(int[] data) { n:j'0WW
sort(data, IMPROVED_QUICK); 5/H,UL
} |rmelQ-
private static String[] name={ E-LkP;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JJ.8V72;!Z
}; k.T=&0J_1
37AVk`a
private static Sort[] impl=new Sort[]{ 8\"<t/_ W
new InsertSort(), UK`A:N2[
new BubbleSort(), #h5:b`fDF
new SelectionSort(), 7WJ\nK
new ShellSort(), H`EhsYYK
new QuickSort(), rTD+7 )E
new ImprovedQuickSort(), ~ELY$G.xl
new MergeSort(), 6W1GvM\e
new ImprovedMergeSort(), \0$+*ejz
new HeapSort() 8-$t7bV5
}; P8 X07IK
,GbmL8P7Y
public static String toString(int algorithm){ &|>@K#V8-;
return name[algorithm-1]; c{#2;k Q,
} =]5tYIU
=bKDD<(
public static void sort(int[] data, int algorithm) { PK\ZRl
impl[algorithm-1].sort(data); f@*69a8
} d\z6Ob"t
5Rqdo\vE
public static interface Sort { |}"YUk^
public void sort(int[] data); K;K0D@>]HR
} gF6> /
^z,3#gK
public static void swap(int[] data, int i, int j) { 0cG'37[
int temp = data; ]ua3I}_B6v
data = data[j]; Szo'[/ [R
data[j] = temp; j#HXuV6
} F>;Wbk&[|
} U)}]Z@I-