[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; qP ,EBE
} '"Nr,vQo
int i1=l; ~ri5zb20
int i2=mid+1; naNghGQ
for(int cur=l;cur<=r;cur++){ !@sUj
if(i1==mid+1) 2<6UwF
data[cur]=temp[i2++]; p7~!z.)o
else if(i2>r) +[ZY:ZQ
data[cur]=temp[i1++]; #9s,# }
else if(temp[i1] data[cur]=temp[i1++]; (k P9hcV
else (m$Y<{)2
data[cur]=temp[i2++]; e+|sSpA
} p<%d2@lp
} _0I@xQj-
\U0'P;em
} @VI@fN
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改进后的归并排序: SrJE_~i
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package org.rut.util.algorithm.support; -g<oS9
n+p }\msH
import org.rut.util.algorithm.SortUtil; &&%H%9
A}^mdw9
/** {{1G`;|v9
* @author treeroot =MWHJ'3-/
* @since 2006-2-2 3c%caK
* @version 1.0 g2]Qv@nxw
*/ _v:SP LU
public class ImprovedMergeSort implements SortUtil.Sort { `@%LzeGz
` %}RNC
private static final int THRESHOLD = 10; ]###w;
4e
/* y>LBl]
* (non-Javadoc) 06jQE2z2R
* tX[WH\(xI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bd`P0f?
*/ F[MFx^sT{
public void sort(int[] data) { T4F/w|Q
int[] temp=new int[data.length]; SfR%s8c`
mergeSort(data,temp,0,data.length-1); _dU\JD
} Xc.`-J~Il
sRfcF`7
private void mergeSort(int[] data, int[] temp, int l, int r) { zeRyL3fnmb
int i, j, k; }a/Cro.~4
int mid = (l + r) / 2; @]0%L0u
if (l == r) (%9$!v{3
return; 0{mex4
if ((mid - l) >= THRESHOLD) k=^xVQuI
mergeSort(data, temp, l, mid); ?cZlN!
else [Qr"cR^
insertSort(data, l, mid - l + 1); !m$jk2<
if ((r - mid) > THRESHOLD) ,,TnIouy
mergeSort(data, temp, mid + 1, r); $Q0n
else 31)&vf[[
insertSort(data, mid + 1, r - mid); ]'S^]
6B-16
for (i = l; i <= mid; i++) { t,'<gI
temp = data; h];I{crh
} cCX*D_kCB
for (j = 1; j <= r - mid; j++) { (sj,[
temp[r - j + 1] = data[j + mid]; [-&Zl(9&
} ]^]wP]R_
int a = temp[l]; kVL.PY\K
int b = temp[r]; `X8F`5&U\f
for (i = l, j = r, k = l; k <= r; k++) { p[cX O=
if (a < b) { WhDJ7{D
data[k] = temp[i++]; %)wjR/o
a = temp; D{!IW!w
} else { v0y(58Rz.
data[k] = temp[j--]; e(yh[7p=
b = temp[j]; ;d?R:Uw8
} _4f;<FL
} hOeRd#AQK
} 8ipez/
,0k;!YK
/** snJ129}A
* @param data g78^9Y*1
* @param l uq{beC
* @param i uw7zWJ n
*/ _G0x3
private void insertSort(int[] data, int start, int len) { s@C}P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `{Ul!
} \Cj B1]I
} 8_F1AU? u
} )X!,3Ca{43
} A=4OWV?
j#6.Gq
堆排序： 0aAoV0fMDz
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package org.rut.util.algorithm.support; cu6Opq9
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import org.rut.util.algorithm.SortUtil; [gB+C84%%
[!z,lY>
/** u4j5w
* @author treeroot XilS!,
* @since 2006-2-2 ix$bRdl
* @version 1.0 _j3fAr(V
*/ M`>E|"<
public class HeapSort implements SortUtil.Sort{ 1"g<0 W
rGO8!X 3d
/* (non-Javadoc) :-'qC8C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]{iQ21`a-
*/ #*}+J3/
public void sort(int[] data) { "}!G!k:
MaxHeap h=new MaxHeap(); #`IN`m|
h.init(data); MJvp6n
for(int i=0;i h.remove(); Vc2`b3"Br
System.arraycopy(h.queue,1,data,0,data.length); Jb(H %NJ
} nwWJ7M,A
3u;oQ5<(v
private static class MaxHeap{ =}*0-\QG
<qSC#[xu
void init(int[] data){ Dj+f]~
this.queue=new int[data.length+1]; 3Y &d=
for(int i=0;i queue[++size]=data; 1qch]1 ^G
fixUp(size); 0mnw{fE8_
} ]! dTG
} / +\9S
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private int size=0; (?c-iKGc
OH88n69
private int[] queue; G9lUxmS<
7"mc+QOp
public int get() { Zh,71Umz
return queue[1]; g ?k=^C
} IU[ [H#
#jk_5W
public void remove() { >bxS3FCX
SortUtil.swap(queue,1,size--); `g,..Ns-r
fixDown(1); NgwbQ7)
} WM{=CD
file://fixdown R@0R`Zs
private void fixDown(int k) { p[-O( 3Y
int j; G"6 !{4g
while ((j = k << 1) <= size) { rZF*q2?
if (j < size %26amp;%26amp; queue[j] j++; :t[_:3@
if (queue[k]>queue[j]) file://不用交换 KP"+e:a%
break; Rv=YFo[B
SortUtil.swap(queue,j,k); Vj-h;rB0z
k = j; Th%zn2R B
} >V937
} 0erNc'e
private void fixUp(int k) { IcEdG(
while (k > 1) { j [a(#V{
int j = k >> 1; ZoeD:xnh[
if (queue[j]>queue[k]) TV:9bn?r)
break; Mhu*[a=;x
SortUtil.swap(queue,j,k); XuTD\g3)
k = j; O8o3O 6[Y
} p'k0#R$
} (mOtU8e
dveiQ
} 5\v3;;A[
CAe!7HiR
} &L:!VL{I
GVz6-T~\>
SortUtil： Zc yc*{DS
*_e3 @g
package org.rut.util.algorithm; N;R^h? '
q| 7(
import org.rut.util.algorithm.support.BubbleSort; 43w}qY1
import org.rut.util.algorithm.support.HeapSort; lMt=|66
import org.rut.util.algorithm.support.ImprovedMergeSort; O2+6st
import org.rut.util.algorithm.support.ImprovedQuickSort; edD)TpmE,
import org.rut.util.algorithm.support.InsertSort; No$3"4wk
import org.rut.util.algorithm.support.MergeSort; .d*8C,
import org.rut.util.algorithm.support.QuickSort; FsPw1A$y
import org.rut.util.algorithm.support.SelectionSort; :DNjhZ
import org.rut.util.algorithm.support.ShellSort; RNL9>7xV
D=$)n_F
/** #z(]xI)"
* @author treeroot ;|RTx
* @since 2006-2-2 Q/?$x*\>
* @version 1.0 [KQi.u
*/ {_}I!`opr$
public class SortUtil { 8(De^H lO
public final static int INSERT = 1; df=f62
public final static int BUBBLE = 2; ~~.}ah/_d
public final static int SELECTION = 3; ta0|^KAA
public final static int SHELL = 4; xG 1nGO
public final static int QUICK = 5; [WJ+h~~ o
public final static int IMPROVED_QUICK = 6; Ni>[D"|
public final static int MERGE = 7; Smh,zCc>s
public final static int IMPROVED_MERGE = 8; vI?, 47Hj+
public final static int HEAP = 9; [7-?7mp!B
h;Qk@F
public static void sort(int[] data) { sT.ss$HY9,
sort(data, IMPROVED_QUICK); TvM~y\s
} 2eogY#
private static String[] name={ q)GdD==
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" maZ)cW?
}; y7{?Ip4[
IBGrt^$M
private static Sort[] impl=new Sort[]{ "MsIjSu
new InsertSort(), l]vm=7:
new BubbleSort(), _aphkeqd
new SelectionSort(), xk5]^yDp
new ShellSort(), _{>vTBU4F
new QuickSort(), wL1MENzp*z
new ImprovedQuickSort(), 4| f*eO
new MergeSort(), Y2TtY;
new ImprovedMergeSort(), ,6/V"kqIP
new HeapSort() u +hX
}; s.rm7r@#
b>W%t
public static String toString(int algorithm){ km(Po}
return name[algorithm-1]; Wqnc{oq|$
} x;S @bY
PnTu
public static void sort(int[] data, int algorithm) { +q4O D$}
impl[algorithm-1].sort(data); [^)g%|W
} OI*H,Z"
wkq 66?
public static interface Sort { y-k.U%
public void sort(int[] data); [0of1eCSl
} v19-./H^ j
4*L_)z&4;
public static void swap(int[] data, int i, int j) { x2EUr,7
int temp = data; F [M,]?
data = data[j]; +vH4MwG$.&
data[j] = temp; J,hCvm
} mw!F{pw
} PCvWS.{