[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; HL*jRl
} dIMs{!
int i1=l; aY8>#t?
int i2=mid+1; Rnun() plJ
for(int cur=l;cur<=r;cur++){ %xkqiI3Ff
if(i1==mid+1) v5 $"v?PT
data[cur]=temp[i2++]; 0Tg/R4dI
else if(i2>r) #%B1,.A
data[cur]=temp[i1++]; +-`Q}~s+
else if(temp[i1] data[cur]=temp[i1++]; L@0DT&5
else j{S\X'?
data[cur]=temp[i2++]; p}O@%*p.
} )7[>/2aGd
} ]-["sw
nA5v+d-<T
} q'd6\G0}
lOcvRF
改进后的归并排序: NCl$vc;,
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package org.rut.util.algorithm.support; O. @_2
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import org.rut.util.algorithm.SortUtil; cM.q^{d`
^cBA8 1
/** BX2&tQSp
* @author treeroot X62z>mM
* @since 2006-2-2 4|7L26,]5
* @version 1.0 {_KuztJGA
*/ 1,9RfYV
public class ImprovedMergeSort implements SortUtil.Sort { J1P82=$,
nEyPNm)
private static final int THRESHOLD = 10; hjaI&?w
pA"pt~6
/* jpT!di
* (non-Javadoc) _N0x&9S$
* 2mVH*\D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q(E$;@
*/ 1K4LEga`
public void sort(int[] data) { cSoZq4
int[] temp=new int[data.length]; `:?padZG
mergeSort(data,temp,0,data.length-1); !\RR UH*
} **dGK_^T0
hFs0qPVY
private void mergeSort(int[] data, int[] temp, int l, int r) { : :e=6i
int i, j, k; +!'6:F
int mid = (l + r) / 2; ^7~=+0cF]
if (l == r) -GH#nF3G
return; <@(HQuL#
if ((mid - l) >= THRESHOLD) :G$NQ*(z
mergeSort(data, temp, l, mid); C[_{ $j(J
else m-7^$
insertSort(data, l, mid - l + 1); X}h{xl
if ((r - mid) > THRESHOLD) L)HuQVc g
mergeSort(data, temp, mid + 1, r); %pe7[/
else GDZe6*
insertSort(data, mid + 1, r - mid); nLJ]tpw^DH
nu4GK}xI
for (i = l; i <= mid; i++) { _av%`bb&z9
temp = data; h&;\
} 6pxj9@X+
for (j = 1; j <= r - mid; j++) { o_X"+s
temp[r - j + 1] = data[j + mid]; 3,S5>~R=
} m9.QGX\]
int a = temp[l]; 80c\O-{
int b = temp[r]; \Vr(P>
for (i = l, j = r, k = l; k <= r; k++) { Z!^iPB0~D
if (a < b) { eWW\m[k]}
data[k] = temp[i++]; W(a=ev2sa
a = temp; kc1 *@<L6
} else { X 4;+`
data[k] = temp[j--]; ZWh:&e(
b = temp[j]; }7wQFKME
} b?h"a<7
} 4$1sBY/
} d+ql@e]
"((6)U#
/** Q0Dw2>~_K
* @param data ^mkplp a
* @param l f\2'/g}6a
* @param i .lOEQLt
*/ "a>%tsl$K
private void insertSort(int[] data, int start, int len) { %(,JBa:G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Go+f0aig
} r#d~($[93
} "&77`R
} C4#'`8E
} .2Y"=|NdA
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堆排序： Vdh5s292h
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package org.rut.util.algorithm.support; W5HC7o\4
. p<*n6E
import org.rut.util.algorithm.SortUtil; !E4YUEY6
Ym2![FC1
/** 7o'kdYJzo
* @author treeroot X<vv:
* @since 2006-2-2 mst-:F[h
* @version 1.0 S^a")U4
*/ Kw"7M~
public class HeapSort implements SortUtil.Sort{ bTb|@
cOxF.(L
/* (non-Javadoc) [Xg?sdQCI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rcY[jF
*/ doW_vu
public void sort(int[] data) { Rm&i"
MaxHeap h=new MaxHeap(); @'7'3+ c
h.init(data); @m<xpel
for(int i=0;i h.remove(); v0apEjT
System.arraycopy(h.queue,1,data,0,data.length); TO-[6Pq#
} ")i4w{_y
[(F.x6z)
private static class MaxHeap{ rMdOE&5G
&Plc
void init(int[] data){ G ZDyw9
this.queue=new int[data.length+1]; |Q@4F&k
for(int i=0;i queue[++size]=data; '[I?G6
fixUp(size); L^Fni~
} R]/3`X9!d>
} p>Qzz`@e
l*e*jA_>:7
private int size=0; f)Z$,&
u$X[=
private int[] queue; a{GPAzO+
hV)D,oN3
public int get() { C-V,3}=*2
return queue[1]; .-awl1 W
} Tuo`>ZA
F;kY5+a7~e
public void remove() { sC(IeGbX
SortUtil.swap(queue,1,size--); !9_HZ(W&
fixDown(1); X3-pj<JLY
} ^KM' O8
file://fixdown wqkD
private void fixDown(int k) { >7V96jL$Y
int j; iP]KV.e'/C
while ((j = k << 1) <= size) { =\"88e;b2
if (j < size %26amp;%26amp; queue[j] j++; ;:4&nJ*qG
if (queue[k]>queue[j]) file://不用交换 PzMJ^H{
break; ="Zr.g~8
SortUtil.swap(queue,j,k); iyKAw
k = j; HkVnTC
} {p[{5k 0
} ?x1sm"]p'
private void fixUp(int k) { eyUguA<lK\
while (k > 1) { zkt`7Pg;J
int j = k >> 1; AJ}QS?p8s
if (queue[j]>queue[k]) ?<)4_
break; 1LYz X;H1
SortUtil.swap(queue,j,k); )S@e&a|
k = j; X'Q?Mh
} 3qujz)o
} >HNBTc=~t
VwvL
} M15Ce)oB1(
-FpZZ8=,M2
} @6h,#8#
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SortUtil： ,.DTJ7H+
`yF6-F
package org.rut.util.algorithm; u_H=Xm)9
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import org.rut.util.algorithm.support.BubbleSort; -w'
import org.rut.util.algorithm.support.HeapSort; JYbsta
import org.rut.util.algorithm.support.ImprovedMergeSort; -UY5T@as
import org.rut.util.algorithm.support.ImprovedQuickSort; _E'F
import org.rut.util.algorithm.support.InsertSort; $~7uDq
import org.rut.util.algorithm.support.MergeSort; `(tVwX4
import org.rut.util.algorithm.support.QuickSort; K|L&mL&8
import org.rut.util.algorithm.support.SelectionSort; YYNh| 2
import org.rut.util.algorithm.support.ShellSort; E$SYXe[,
Y*VF1M,2_
/** k_;g-r,
* @author treeroot lCafsIB
* @since 2006-2-2 )qSjI_qt5
* @version 1.0 gy5^JL
*/ 1Hl-|n
public class SortUtil { .`p,pt;
public final static int INSERT = 1; W(5XcP(
public final static int BUBBLE = 2; /cHUqn30a
public final static int SELECTION = 3; |\.:h":!0~
public final static int SHELL = 4; >0F)^W?
public final static int QUICK = 5; O06 2c)vIY
public final static int IMPROVED_QUICK = 6; ej91)3AO
public final static int MERGE = 7; 21k,{FB'?
public final static int IMPROVED_MERGE = 8; 8c`EB-y
public final static int HEAP = 9; 5Ve`j,`=<
n(uzqd
public static void sort(int[] data) { i?wEd!=w
sort(data, IMPROVED_QUICK); Mi~x(W@}3
} /a,"b8
private static String[] name={ <)$&V*\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B4@1WZn<8
}; `T\_Wje(
&x?m5%^l
private static Sort[] impl=new Sort[]{ ^[x6p}$
new InsertSort(), }~NM\rm
new BubbleSort(), gmqA 5W~y
new SelectionSort(), k"3@G?JY
new ShellSort(), B>}B{qi|
new QuickSort(), Ec9%RAxl
new ImprovedQuickSort(), vpq"mpfkh
new MergeSort(), |.*nq
new ImprovedMergeSort(), ^jbjHI&
new HeapSort() Mfn^v:Q#
}; 2c*w{\X
>,x&L[3
public static String toString(int algorithm){ E-jJ!>&K
return name[algorithm-1]; `+h+X9
} L35]'Jua
s6F0&L;N&
public static void sort(int[] data, int algorithm) { IG.!M@_
impl[algorithm-1].sort(data); H Y~[/H+:
} 1B#iJZ}
gy1R.SN
public static interface Sort { (gRTSd T?
public void sort(int[] data); }<qZXb1
} *ESi~7;#
X2|&\G9c
public static void swap(int[] data, int i, int j) { @;G%7&ps
int temp = data; wRdN(`;v
data = data[j]; x4i&;SP0
data[j] = temp; n-9a0_{k
} XRmE
} Y[N@ )E_G