[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; AR5)Uws
} <~35tOpv
int i1=l; )r:gDd#/X
int i2=mid+1; t$b{zv9C
for(int cur=l;cur<=r;cur++){ OT}^dPQe
if(i1==mid+1) 0`"DYJ}d
data[cur]=temp[i2++]; RV, cQ K
else if(i2>r) OJPi*i5*
data[cur]=temp[i1++]; c:_dW;MJ0
else if(temp[i1] data[cur]=temp[i1++]; ;F\sMf{
else Pxe7 \e
data[cur]=temp[i2++]; gYvT'72
} kaZ_ra;<
} >Mk#19j[/
3Vb/Mn!k
} ??=su.b
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改进后的归并排序: 5:X^Q.f;
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package org.rut.util.algorithm.support; &3bhK5P
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import org.rut.util.algorithm.SortUtil; khfWU
oD~q/04!
/** =FXq=x%9+
* @author treeroot t{Gc,S!]5
* @since 2006-2-2 \xexl1_;
* @version 1.0 XFWo"%}w
*/ mA0|W#NB
public class ImprovedMergeSort implements SortUtil.Sort { Gque@u
</)QCl'd
private static final int THRESHOLD = 10; wVtBH_>
wxo{gBq
/* ueV,p?Wo
* (non-Javadoc) 3\&I7o3V
* g2W ZW#a)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7?"-NrW~
*/ S]}W+BF3
public void sort(int[] data) { 2U`g[1
int[] temp=new int[data.length]; H0Ck%5
mergeSort(data,temp,0,data.length-1); ^ lM.lS>)
} w.R2' WR
bKP@-<:]
private void mergeSort(int[] data, int[] temp, int l, int r) { X16r$~Pb
int i, j, k; p#tbN5i[{7
int mid = (l + r) / 2; 2qfKDZ9f^
if (l == r) DjQgF=;
return; RS /*Dp^
if ((mid - l) >= THRESHOLD) =!P$[pN2
mergeSort(data, temp, l, mid); @1iH4RE*
else \6K1Z!*;
insertSort(data, l, mid - l + 1); L|K^w *\C
if ((r - mid) > THRESHOLD) u13v@<HGc
mergeSort(data, temp, mid + 1, r); _$BH.I
else Ej/P:nB
insertSort(data, mid + 1, r - mid); *K2fp=Ns
Bu,VLIba
for (i = l; i <= mid; i++) { nTxN>?l2E
temp = data; jK-usn
} @sLB _f
for (j = 1; j <= r - mid; j++) { DyPb]Udb:
temp[r - j + 1] = data[j + mid]; QN OA66
} K{[N.dX(
int a = temp[l]; Q804_F F#
int b = temp[r]; !:9s>0';N
for (i = l, j = r, k = l; k <= r; k++) { Q[UYNQ0w
if (a < b) { 8PwPI%Pb
data[k] = temp[i++]; 2)47$eu
a = temp; C&-]RffA
} else { Cy'! >
data[k] = temp[j--]; G.sf>.[
b = temp[j]; RL~]mI!U
} -q}I; cH
} :dj=kuUTbu
} gtw?u b
gaxxB]8
/** &<oDl_^
* @param data #i0f}&
* @param l QsH?qI&2jp
* @param i eCXw8
*/ 2RC@Fu~zaU
private void insertSort(int[] data, int start, int len) { dn|OY.`|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NGOyd1$7N
} j`ybzG^
} tboc7Hor4
} =y WHm
} 1i:Q %E F
n`2LGc[rP
堆排序： `]4bH,%~
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package org.rut.util.algorithm.support; AN 'L- E
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import org.rut.util.algorithm.SortUtil; =>,X)+O
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/** %6HJM| {H
* @author treeroot k9 NPC"
* @since 2006-2-2 g RBbL1
* @version 1.0 Tl`HFZQ1
*/ f4r)g2Zb[
public class HeapSort implements SortUtil.Sort{ h^=9R6im
+DA,|~k_
/* (non-Javadoc) $7'KcG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GP;UuQz
*/ &1$|KbmV4
public void sort(int[] data) { a7wc>@9Q,
MaxHeap h=new MaxHeap(); U# 7K^(E9
h.init(data); XD$;K$_7
for(int i=0;i h.remove(); ?N(opggiD
System.arraycopy(h.queue,1,data,0,data.length); _omz74
} Ul%D}(,
'(!U5j
private static class MaxHeap{ ;iTZzmB
19 <Lgr
void init(int[] data){ +N:=|u.g
this.queue=new int[data.length+1]; eL{6;.C
for(int i=0;i queue[++size]=data; LQ3J$N
fixUp(size); ^muPjM+D
} |tqYRWn0
} dPCn6
bbxo!K m"
private int size=0; J\c\Ar:
gzeTBlXg
private int[] queue; Lm"zW>v
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public int get() { Xgyi}~AoaU
return queue[1]; z]bcg$m
} Gfy9?sa
c},wW@SF2W
public void remove() { 6P U]I+
SortUtil.swap(queue,1,size--); ^F4h:
fixDown(1); bA8RoC
} JPGEE1!B{b
file://fixdown t'im\_$F
private void fixDown(int k) { d+Au`'{>
int j; rugR>&mea
while ((j = k << 1) <= size) { FvT;8ik:3
if (j < size %26amp;%26amp; queue[j] j++; :Wl`8p4]
if (queue[k]>queue[j]) file://不用交换 \+Pk"M
break; n>aH7
SortUtil.swap(queue,j,k); HlC[Nu^6U
k = j; v JPX`T|
} x>m=n_
} ?fmW'vs
private void fixUp(int k) { Ze-MB0w
while (k > 1) { B96"|v$
int j = k >> 1; ] R-<v&O
if (queue[j]>queue[k]) mqk tM6
break; Gn}^BJN
SortUtil.swap(queue,j,k); B[B(=4EzMP
k = j; mdy+ >e<
} 0$\ j
} I4\ c+f9
fNaboNj[
} E{W(5.kb;i
]?A-D,!(
} +L\bg|;
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SortUtil： Mv#\+|p 1x
tX 3y{W10"
package org.rut.util.algorithm; wS}Rl}#Oh?
=?s0.(;
import org.rut.util.algorithm.support.BubbleSort; ^{R.X:a
import org.rut.util.algorithm.support.HeapSort; w6FVSU]sY
import org.rut.util.algorithm.support.ImprovedMergeSort; tX7TP(
import org.rut.util.algorithm.support.ImprovedQuickSort; _l||69|.
import org.rut.util.algorithm.support.InsertSort; !y syb
import org.rut.util.algorithm.support.MergeSort; {H[3[
import org.rut.util.algorithm.support.QuickSort; WuUT>omH
import org.rut.util.algorithm.support.SelectionSort; sad[(|
import org.rut.util.algorithm.support.ShellSort; :Co+haW
)3A%Un#B
/** 6Z7J<0
* @author treeroot VH2/
* @since 2006-2-2 =]<JkWSk
* @version 1.0 L$4nbOu\~
*/ m0_B[dw
public class SortUtil { 3P[u>xE
public final static int INSERT = 1; cu#s}*Ip
public final static int BUBBLE = 2; Ye"#tCOEG
public final static int SELECTION = 3; 71inHg
public final static int SHELL = 4; "R9^X3;
public final static int QUICK = 5; {u_2L_
public final static int IMPROVED_QUICK = 6; 19#A7
public final static int MERGE = 7; HC\\w-`<
public final static int IMPROVED_MERGE = 8; k}$k6Sr"
public final static int HEAP = 9; l5fF.A7TT
nk^-+olm
public static void sort(int[] data) { n,.t~
sort(data, IMPROVED_QUICK); k%fy
} ^#)M,.G^
private static String[] name={ }}MZgm~U)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ct-;L' a
}; U7@)RJ
QQIU5
private static Sort[] impl=new Sort[]{ ?QfomTT
new InsertSort(), !|`vW{v
new BubbleSort(), ;OD+6@Sr
new SelectionSort(), SF?s^
new ShellSort(), 3&ES?MyB#
new QuickSort(), ]`GDZw`
new ImprovedQuickSort(), *, RxOz2=
new MergeSort(), **L3T3$)
new ImprovedMergeSort(), Imm|5-qJ
new HeapSort() [[8.Xb
}; sksop4gu5
k<cv80lhK
public static String toString(int algorithm){ aB+B1YdY"
return name[algorithm-1]; Z4aK
} <rAk"R^
jFThW N
public static void sort(int[] data, int algorithm) { iz pFl@WS
impl[algorithm-1].sort(data); j~:N8(=
} ajMI7j^G
PquATAzQA
public static interface Sort { @E5}v
public void sort(int[] data); 1ps_zn(
} h<ULp&g
WA&&*ae5`
public static void swap(int[] data, int i, int j) { \NI0rL
int temp = data; 8`S6BkfC|
data = data[j]; PS${B
data[j] = temp; 0&k!=gj:>Z
} @mu2,%
} 1[Ffl^\ARp