[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; Fj8z
} v|_K/|
int i1=l; q"CVcLi9
int i2=mid+1; c)6m$5]
for(int cur=l;cur<=r;cur++){ ]NQfX[
if(i1==mid+1) .ljnDL/
data[cur]=temp[i2++]; pGP7nw_g
else if(i2>r) RtkEGxw*^
data[cur]=temp[i1++]; Y#ap*
else if(temp[i1] data[cur]=temp[i1++]; > ym,{EHK
else dK$XNi13.5
data[cur]=temp[i2++]; 6##_%PO<m
} ;0]aq0_#(
} xk9%F?)
L81ZbNU?$
} */5d>04
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改进后的归并排序: 4B8oO
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package org.rut.util.algorithm.support; 59 T8r
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import org.rut.util.algorithm.SortUtil; 1W c=5!
nK1Slg#U
/** >mbHy<<
* @author treeroot a Yg6H2Un
* @since 2006-2-2 1sy[@Q2b
* @version 1.0 G{As,`{
*/ ih-#5M@
public class ImprovedMergeSort implements SortUtil.Sort { gMi0FO'
>jDDQ@
private static final int THRESHOLD = 10; ozyX$tp
<`8n^m*
/* gmUz9P(
* (non-Javadoc) P1.[
* rK8lBy:<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nmee 'oEw
*/ |"q5sym8Y_
public void sort(int[] data) { W<h)HhyG
int[] temp=new int[data.length]; k&M;,e3v6
mergeSort(data,temp,0,data.length-1); {r,.!;mHu
} f=+mIZ
ydEoC$?0
private void mergeSort(int[] data, int[] temp, int l, int r) { xWH.^o,"
int i, j, k; ?.m bK
int mid = (l + r) / 2; rET\n(AJ
if (l == r) x;O[c3I
return; q^@Q"J =v
if ((mid - l) >= THRESHOLD) 7(1|xYCx$
mergeSort(data, temp, l, mid); lf`{zc r:
else (q/e1L-S
insertSort(data, l, mid - l + 1); dohA0
if ((r - mid) > THRESHOLD) #H&|*lr
mergeSort(data, temp, mid + 1, r); xJpA0_xfG
else ?d\N(s9F
insertSort(data, mid + 1, r - mid); \{_q.;}
RT4x\&q
for (i = l; i <= mid; i++) { w?PkO p
temp = data; Qab>|eSm
} +uF>2b6'
for (j = 1; j <= r - mid; j++) { f#>,1,S
temp[r - j + 1] = data[j + mid]; djl*H
} #Qw0&kM7I
int a = temp[l]; u=*FI
int b = temp[r]; c1(RuP:S
for (i = l, j = r, k = l; k <= r; k++) { .|KyNBn
if (a < b) { 1/B>XkCJ
data[k] = temp[i++]; (Bb5?fw
a = temp; EmWn%eMN
} else { AG nxYV"p
data[k] = temp[j--]; f3l&3hC
b = temp[j]; fivw~z|[@
} zy?|ODM
} V;VHv=9`o
} 3Y4?CM&0v
94`7a<&ZNL
/** ](]i 'fE>
* @param data [-1^-bb
* @param l @}u*|P*
* @param i h%na>G
*/ AEI>\Y
private void insertSort(int[] data, int start, int len) { x M/+L:_<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ys9[5@7
} caR<Kb:;*
} ,$L4dF3
} sjHE/qmq-Z
} aH(J,XY
,Q$q=E;X
堆排序： ah$b[\#C
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package org.rut.util.algorithm.support; & bm 1Fz
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import org.rut.util.algorithm.SortUtil; IZ-1c1
w>&aEv/f
/** !<8W {LT
* @author treeroot ' ,wFTV&
* @since 2006-2-2 \[i1JG
* @version 1.0 `,*3[
*/ A/$QaB,x
public class HeapSort implements SortUtil.Sort{ ;W )Y OT
ij`w} V
/* (non-Javadoc) MTh<|$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A0s ZOCky
*/ ~8Fk(E_
public void sort(int[] data) { =!A_^;NQf
MaxHeap h=new MaxHeap(); %g$o/A$
h.init(data); ^$jb7HMObI
for(int i=0;i h.remove(); {%5eMyF#
System.arraycopy(h.queue,1,data,0,data.length); ?3`UbN:
} :K,i\
T@B/xAq5!
private static class MaxHeap{ /N10
x_Y!5yg E
void init(int[] data){ H [\o RId
this.queue=new int[data.length+1]; oG?Xk%7&\
for(int i=0;i queue[++size]=data; 3BUSv#w{i
fixUp(size); 9wUkh}s
} <?.&^|kS
} rl;~pO5R9
yjX9oxhtL
private int size=0; K&]G3W%V
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private int[] queue; .p3,O6y2(F
3BJ0S.TF
public int get() { Xza(k
return queue[1]; >Eto( y"q
} &-6Gc;f8
2 c{34:
public void remove() { 9ULQrq$?
SortUtil.swap(queue,1,size--); Np9<:GF1
fixDown(1); zrgk]n;Pq
} N/2T[s_&
file://fixdown dt]-,Y
private void fixDown(int k) { R4cM%l_#W
int j; nPl?K:(
while ((j = k << 1) <= size) { _4So{~Gf1
if (j < size %26amp;%26amp; queue[j] j++; &i6mW8l
if (queue[k]>queue[j]) file://不用交换 n0 {i&[I~+
break; 9wwqcx)3(
SortUtil.swap(queue,j,k); OX!tsARC@
k = j; 19)i*\+
} I;|B.j
} sY Qk
private void fixUp(int k) { _S1>j7RQo
while (k > 1) { j{A y\n(
int j = k >> 1; "Ac-tzhE
if (queue[j]>queue[k]) DV-d(@`K
break; %s|Ely)
SortUtil.swap(queue,j,k); X`>i&I]
k = j; E6ElNgL
} cp7=epho
} t\,PB{P:J
m}t`FsB.
} WX?IYQ+
k$R-#f;
} KwSqKI7]0
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SortUtil： $a"Oc
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package org.rut.util.algorithm; 1};Stai'
\&3+D8H>n
import org.rut.util.algorithm.support.BubbleSort; zP8lN(LA
import org.rut.util.algorithm.support.HeapSort; 5x4yyb'
import org.rut.util.algorithm.support.ImprovedMergeSort; Id .nu/
import org.rut.util.algorithm.support.ImprovedQuickSort; pJ"qu,w
import org.rut.util.algorithm.support.InsertSort; IueFx u
import org.rut.util.algorithm.support.MergeSort; P@Oo$ o
import org.rut.util.algorithm.support.QuickSort; W+?4jwqw
import org.rut.util.algorithm.support.SelectionSort; Ckuh:bs
import org.rut.util.algorithm.support.ShellSort; <uw9DU7G
7'V@+5
/** ZDYJ\}=
* @author treeroot EgCAsSx(
* @since 2006-2-2 K`zdc`/
* @version 1.0 m@v\(rT.
*/ k"zv~`i'
public class SortUtil { )U:m:cr<
public final static int INSERT = 1; l4YJ c
public final static int BUBBLE = 2; {@{']Y
public final static int SELECTION = 3; Vaw+.sG`AP
public final static int SHELL = 4; mnX2a
public final static int QUICK = 5; 9F;>W ET
public final static int IMPROVED_QUICK = 6; 6}Ci>_i4#
public final static int MERGE = 7; 37.S\gO]
public final static int IMPROVED_MERGE = 8; K;H&n1
public final static int HEAP = 9; YfKdR"i+.
WO>nIo5Y
public static void sort(int[] data) { &Q#66ev
sort(data, IMPROVED_QUICK); h]}wp;Z
} #gs`#6 ,'
private static String[] name={ 29] G^f>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 08\,<9
}; eJX9_6m-
_|I#{jK
private static Sort[] impl=new Sort[]{ zL0pw'4
new InsertSort(), {ROVvs`
new BubbleSort(), Vv=. -&'
new SelectionSort(), |3"KK
new ShellSort(), PB*&aYLU
new QuickSort(), ~P**O~
new ImprovedQuickSort(), #r\4sVg
new MergeSort(), .|fHy
new ImprovedMergeSort(), 4!yzsPJL
new HeapSort() `mJ6K&t$<
}; j>"@,B g*
J<h$ wM
public static String toString(int algorithm){ `l[c_%Bm
return name[algorithm-1]; D'DfJwA
} v^*K:#<Q!
;$wVu|&
public static void sort(int[] data, int algorithm) { !?h;wR
impl[algorithm-1].sort(data); ^k">A:E2
} #h ]g?*}OJ
K Z91-
public static interface Sort { n 0L^e
public void sort(int[] data); S|N_o
} })Vi
YPk fx
public static void swap(int[] data, int i, int j) { _A9AEi'.
int temp = data; @K!T,U
data = data[j]; QlU8uI[dk
data[j] = temp; &B1WtW
} bK&+5t&
} GGs}i1m