[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; u5f+%!p
} + *YGsM`E9
int i1=l; $z7[RLu0!
int i2=mid+1; pai>6p
for(int cur=l;cur<=r;cur++){ (8!#<$
if(i1==mid+1) z.H*"r
data[cur]=temp[i2++]; fwy-M:
else if(i2>r) zS Yh ?NB5
data[cur]=temp[i1++]; O<R6^0B42
else if(temp[i1] data[cur]=temp[i1++]; ,w.`(?I/
else 0Fw0#eE
data[cur]=temp[i2++]; jafq(t
} TQ?D*&
} 9T47U; _)
r9Ux=W\
} UarU.~Uqi
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改进后的归并排序: U*ZP>Vv
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package org.rut.util.algorithm.support; JM{S49Lx
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import org.rut.util.algorithm.SortUtil; hFw\uETu
Sti)YCXH
/** khl(9R4a
* @author treeroot {xw*H<"f<
* @since 2006-2-2 k]<
* @version 1.0 EXDtVa Ot
*/ -ob_]CKtJ~
public class ImprovedMergeSort implements SortUtil.Sort { %3e}YQe)
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private static final int THRESHOLD = 10; 4BG6C'`%
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/* ND\&#
* (non-Javadoc) ?lv{;4BC
* y D.S"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J/j1Yf'9
*/ 5y! 4ny_
public void sort(int[] data) { buo_H@@p{s
int[] temp=new int[data.length]; B&0^3iKFi
mergeSort(data,temp,0,data.length-1); - Z"w
} eL9RrSXz
*=L3bBu?
private void mergeSort(int[] data, int[] temp, int l, int r) { PY: l
int i, j, k; :g3n [7wR
int mid = (l + r) / 2; (veGztt
if (l == r) -zg,pK$+
return; #Nxk3He]8
if ((mid - l) >= THRESHOLD) `rC9i5:
mergeSort(data, temp, l, mid); e#K =SV!H
else !v|j C
insertSort(data, l, mid - l + 1); )((Jnm D
if ((r - mid) > THRESHOLD) 9|dgmEd
mergeSort(data, temp, mid + 1, r); ~oI7TP
else W-%oj.BMA
insertSort(data, mid + 1, r - mid); IC+Z C
#M6@{R2_
for (i = l; i <= mid; i++) { $j^Jj
temp = data; /Dj6Bj }
} \`o+Le+%
for (j = 1; j <= r - mid; j++) { .MuS"R{y
temp[r - j + 1] = data[j + mid]; aksyr$d0V<
} oD_je~b)
int a = temp[l]; au2ieZZ[
int b = temp[r]; 9@Yk8
for (i = l, j = r, k = l; k <= r; k++) { "<0BCJJ
if (a < b) { $<2r;'?0D
data[k] = temp[i++]; 9 )u*IGj
a = temp; T F&xiL^
} else { 8 s!0Z1Roc
data[k] = temp[j--]; O^hWG ~o
b = temp[j]; LF <fp&C)h
} aOfL;I
} T5NO}bz
} }kI-UEn$EP
-_.)~)P
/** 7+JQaYO`"
* @param data E#r6e+e1Q%
* @param l 0Psp/H%
* @param i ),0_ C\
*/ `GS!$9j
private void insertSort(int[] data, int start, int len) { B#AAG*Ai8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G!k&'{2
} Lv+lLK
} LYNd^}
} 64>E|w
} x)l}d3
CL|t!+wU/
堆排序： 5j1}?0v_
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package org.rut.util.algorithm.support; UvRa7[<y%%
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import org.rut.util.algorithm.SortUtil; }UZ$<81=
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/** G!T)V2y
* @author treeroot S9}P5;u
* @since 2006-2-2 :.f =>s]
* @version 1.0 o!^':mll
*/ G*uy@s:
public class HeapSort implements SortUtil.Sort{ :XEr{X
Um]>B`."wK
/* (non-Javadoc) mza1Q~<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JYOyz+wNd
*/ /ZHuT=j1
public void sort(int[] data) { ,,S5 8\x
MaxHeap h=new MaxHeap(); [[P?T^KT
h.init(data); }MW*xtGV
for(int i=0;i h.remove(); ~{iBm"4
System.arraycopy(h.queue,1,data,0,data.length); B2:6=8<
} 55MsF}p
)(TaVHJR
private static class MaxHeap{ ]S<eO6z
RoSh|$JF
void init(int[] data){ #P=rP=
this.queue=new int[data.length+1]; U(]a(k<r
for(int i=0;i queue[++size]=data; BusD}9QqB
fixUp(size); Q ,30
} |`_qmk[:R
} p;`jmF
dX{|-;6vm
private int size=0; xOP%SF
xCFk1%qf
private int[] queue; E ;65kZ
F7gipCc1We
public int get() { TKj8a(R_
return queue[1]; f305yo
} DZ5%-
I>o+INb:
public void remove() { m5Q,RwJ!xK
SortUtil.swap(queue,1,size--); H!Z=}>TN
fixDown(1); 8o#*0d|
} mv|eEz)r
file://fixdown Ke '?
private void fixDown(int k) { eU'DQp*
int j; "_]n_[t2C
while ((j = k << 1) <= size) { iM+K&\{_h
if (j < size %26amp;%26amp; queue[j] j++; 1OK,r`
if (queue[k]>queue[j]) file://不用交换 !c[(#g
break; \c3zK|^
SortUtil.swap(queue,j,k); }UJS*mR
k = j; S%<RV6{aiM
} <h:>:%#k
} jm0J)Z_"nr
private void fixUp(int k) { n#t{3qzpD
while (k > 1) { Q1 ?O~ao
int j = k >> 1; < gB>j\:
if (queue[j]>queue[k]) {2G9>'
break; sE@t$'=
SortUtil.swap(queue,j,k); :L#t?~
k = j; QEK,mc3
} Nq6~6Rr
} Fj}|uiOQUS
sc'QNhrW
} ;cd{+0
BV,P;T0"D
} qOYCQ
LWE[]1=
SortUtil： bg;NBoZd
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package org.rut.util.algorithm; E;$)Oz
p>4$&-
import org.rut.util.algorithm.support.BubbleSort; c=]qUhnH
import org.rut.util.algorithm.support.HeapSort; T.O^40y
import org.rut.util.algorithm.support.ImprovedMergeSort; P5/K?I~/So
import org.rut.util.algorithm.support.ImprovedQuickSort; d!kiWmw,
import org.rut.util.algorithm.support.InsertSort; D|m6gP;P
import org.rut.util.algorithm.support.MergeSort; So; ;
import org.rut.util.algorithm.support.QuickSort; | n5F_RL
import org.rut.util.algorithm.support.SelectionSort; 6z v+Av:
import org.rut.util.algorithm.support.ShellSort; meunAEe
v(D{_
/** 1;cV [&3
* @author treeroot }rf_:
* @since 2006-2-2 U;Z6o1G
* @version 1.0 s\QhCS
*/ N"MK 0k
public class SortUtil { 4]9+
public final static int INSERT = 1; <![tn#_
public final static int BUBBLE = 2; AY4ZU CqI
public final static int SELECTION = 3; p'UYHt
public final static int SHELL = 4; A5-y+
public final static int QUICK = 5; (\m4o
public final static int IMPROVED_QUICK = 6; `$oGgz6ZT
public final static int MERGE = 7; "3o{@TdU
public final static int IMPROVED_MERGE = 8; #g[jwl'
public final static int HEAP = 9; (7BG~T
&.z: i5&o!
public static void sort(int[] data) { f`'?2
sort(data, IMPROVED_QUICK); ry9%Y3
} %7=B?c|
private static String[] name={ >Ia{ZbQV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cF!ygz//
}; vmdu9"H
)W9W8>Cc5_
private static Sort[] impl=new Sort[]{ ?dMyhU}
new InsertSort(), +c4]}9f!
new BubbleSort(), pQ%~u3
new SelectionSort(), e! V`cg0
new ShellSort(), C9zQ{G
new QuickSort(), &LM@_P"T
new ImprovedQuickSort(), #4S">u
new MergeSort(), M{I8b<hY
new ImprovedMergeSort(), am,UUJ+h>
new HeapSort() -w nlJi1f
}; 0'y9HE'e
; (I(TG
public static String toString(int algorithm){ `Wq4k>J}*
return name[algorithm-1]; D?;8bI%"
} |uo<<-\jTO
fp!Ba
public static void sort(int[] data, int algorithm) { <)n8lIK
impl[algorithm-1].sort(data); J.'}R2gT1
} ?K,xxH
=^ur@E
public static interface Sort { ,{wA%Oy,
public void sort(int[] data); h+EG) <
} .ko8`J%%M
9x;CJhX
public static void swap(int[] data, int i, int j) { W,&z:z>
int temp = data; 1haH2F^q3
data = data[j]; 0}:- t^P
data[j] = temp; L3[r7 b
} V,t&jgG*
} !ceT>i90h