[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; C'C'@?]
} SRq0y,d
int i1=l; OM!CP'u#{
int i2=mid+1; L^:+8g
for(int cur=l;cur<=r;cur++){ eR.ucTji
if(i1==mid+1) m|<j9.iJ
data[cur]=temp[i2++]; "|{O%X
else if(i2>r) pqPhtWi%PJ
data[cur]=temp[i1++]; xXl^\?HC
else if(temp[i1] data[cur]=temp[i1++]; CybHr#LBc
else K9co_n_L
data[cur]=temp[i2++]; gTRm
} 5?),6o);
} yW.s?3X
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} $\>GQ~k
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改进后的归并排序: S/CT;M@W
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package org.rut.util.algorithm.support; ;+XiDEX0}
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import org.rut.util.algorithm.SortUtil; HVzG }r(J
L 0kK'n?
/** x0wy3+GZc
* @author treeroot 2ul!f7#E
* @since 2006-2-2 mT\!LpX
* @version 1.0 b]hP;QK`U$
*/ (v*$ExF
public class ImprovedMergeSort implements SortUtil.Sort { ot P7;l
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private static final int THRESHOLD = 10; AZcWf8
/7X:=~m
/* I3o6ym-i
* (non-Javadoc) HgY"nrogt$
* N?0T3-/K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c,;-[sn
*/ 'Syq!=,
public void sort(int[] data) { 6&7#?/Lq
int[] temp=new int[data.length]; dL5u-<y&
mergeSort(data,temp,0,data.length-1); <\@JbL*
} I0oM\~#
vsg"!y@v
private void mergeSort(int[] data, int[] temp, int l, int r) { G@b|{!
int i, j, k; 1{R1:`
int mid = (l + r) / 2; :N5R.@9
if (l == r) */ZrZ^?o
return; <T JUKznO
if ((mid - l) >= THRESHOLD) t>><|~wp
mergeSort(data, temp, l, mid); ?cf9q@eAH
else RVtb0FL
insertSort(data, l, mid - l + 1); c*ac9Y'o
if ((r - mid) > THRESHOLD) WP7*Q:5
mergeSort(data, temp, mid + 1, r); A?'Tigi
else .0;Z:x_3
insertSort(data, mid + 1, r - mid); DU#6%8~
"<x%kD
for (i = l; i <= mid; i++) { jI!}}K)d
temp = data; K"-.K]O8E%
} gy/z;fB
for (j = 1; j <= r - mid; j++) { WjtmV2b<7
temp[r - j + 1] = data[j + mid]; 0t?:
} UOy9N
int a = temp[l]; _n(O?M&x
int b = temp[r]; ,Hn{nVU1R=
for (i = l, j = r, k = l; k <= r; k++) { zl\mBSBx"
if (a < b) { Hrm^@3
data[k] = temp[i++]; F?xbVN
a = temp; _v:t$k#sN
} else { Q1? !,a
data[k] = temp[j--]; <rV3(qb#]J
b = temp[j]; ]Sg4>tp
} 8R}CvzI
} 'v iF8?_
} sui3(wb
IY2caXu
/** G4][`C]8c
* @param data -t2bHhG
* @param l HM ;9%rtO
* @param i ^w'y>uFM
*/ u*0Ck*pZ
private void insertSort(int[] data, int start, int len) { `''\FPhh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^%tmHDNL.
} :G\f(2@
} kKwb)i
} 8TIc;'bRM
} 6jT+kq)
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堆排序： JJ_77i
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package org.rut.util.algorithm.support; U{Xg#UN
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import org.rut.util.algorithm.SortUtil; @*'$QD,
0w[#`
/** ,tBb$T)7<
* @author treeroot uaN0X"
* @since 2006-2-2 v.Wkz9 w}
* @version 1.0 GqB]^snh
*/ _Eo$V&
public class HeapSort implements SortUtil.Sort{ Fy_D[g
e7rD,`NiV
/* (non-Javadoc) &0A^_Z .nA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) . Z 93S|q
*/ X}Heaqn
public void sort(int[] data) { HX\^ecZ#E
MaxHeap h=new MaxHeap(); c!n\?lB
h.init(data); 3Q'Q %2
for(int i=0;i h.remove(); 08*bYJu
System.arraycopy(h.queue,1,data,0,data.length); 8{QN$Qkn
} F2jZ3[P
4 XSEN]F
private static class MaxHeap{ JRfG]u6GU
Fo K!JX*
void init(int[] data){ ro:B[XE
this.queue=new int[data.length+1]; 7mG/f
for(int i=0;i queue[++size]=data; 4O}ZnE1[
fixUp(size); c8'a<<sj
} P_Rh& gkuK
} \C<|yD
Wx~N1+
private int size=0; @ Gxnrh6
@APv?>$)
private int[] queue; J0xV\O !e
-qv*%O@
public int get() { <UI^~Azc#
return queue[1]; N$cm;G=]
} IY$v%%2WZ
~MuD`a7#G
public void remove() { }.+{M.[}
SortUtil.swap(queue,1,size--); tb#9TF
fixDown(1); @D$^- S6
} #j!RbW
file://fixdown &~9'7 n!
private void fixDown(int k) { 'IVNqfC)u
int j; Yz"B
while ((j = k << 1) <= size) { dXwfOC\\
if (j < size %26amp;%26amp; queue[j] j++; X*4iNyIs_
if (queue[k]>queue[j]) file://不用交换 Xaz`L
break; v@_^h}h/,=
SortUtil.swap(queue,j,k); FBDRbJ su
k = j; yiourR)H<
} Gcu[G]D
} hrT!S
private void fixUp(int k) { 1W@ C]n4
while (k > 1) { "e)C.#3
int j = k >> 1; b-'T>1V
if (queue[j]>queue[k]) k&oq6!ix
break; o p{DPUO0
SortUtil.swap(queue,j,k); }vx+/J
k = j; fLGZ@-qA0
} pv LA:LW2
} ^v5v7\!
P|0dZHpT
} WR5@S&fU`
k4@$vxy0
} yaDK_fk
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SortUtil： <in#_Of{E
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package org.rut.util.algorithm; (L{>la!
)R~l@QBN
import org.rut.util.algorithm.support.BubbleSort; 7IEG%FY T
import org.rut.util.algorithm.support.HeapSort; [.ya&E)x
import org.rut.util.algorithm.support.ImprovedMergeSort; \my5E\
import org.rut.util.algorithm.support.ImprovedQuickSort; moop.}O<
import org.rut.util.algorithm.support.InsertSort; H{tG:KH
import org.rut.util.algorithm.support.MergeSort; Bsr;MVD
import org.rut.util.algorithm.support.QuickSort; "#ctT-g`6
import org.rut.util.algorithm.support.SelectionSort; `]u!4pP"
import org.rut.util.algorithm.support.ShellSort; /"q wC
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/** lla?;^,
* @author treeroot LtJl\m.th
* @since 2006-2-2 bi01]
* @version 1.0 #L3heb&9
*/ obRYU|T
public class SortUtil { W{)RJ1
public final static int INSERT = 1; =qg;K'M5
public final static int BUBBLE = 2; s|cL mL[
public final static int SELECTION = 3; k'(d$;Jgr
public final static int SHELL = 4; &"_5?7_N
public final static int QUICK = 5; w#-J ?/m
public final static int IMPROVED_QUICK = 6; @.D1_A
public final static int MERGE = 7; f3[/zcm;
public final static int IMPROVED_MERGE = 8; -g5o+RT@
public final static int HEAP = 9; xE{PsN1 X;
per$%;5E"
public static void sort(int[] data) { L\GjG&Y5
sort(data, IMPROVED_QUICK); mi`jY0e2
} `]T#uP<u
private static String[] name={ zyHHz\{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vq?aFX9F
}; P5$L(x%~
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private static Sort[] impl=new Sort[]{ yJ0q)x sS
new InsertSort(), J*%XtRio
new BubbleSort(), 8.Z9 i
new SelectionSort(), ;z Qrree#
new ShellSort(), o@5zf{-
new QuickSort(), btG+Ak+K*
new ImprovedQuickSort(), $FJf8u`
new MergeSort(), << XWL:
new ImprovedMergeSort(), 9ZYT#h
new HeapSort() ntZl(]l
}; g)L?C'BG
ZcQ@%XY3~
public static String toString(int algorithm){ *)8!~Hs
return name[algorithm-1]; 4?u<i=i
} uOv0ut\\G
:(?F(Q^
public static void sort(int[] data, int algorithm) { Y!1x,"O'H
impl[algorithm-1].sort(data); =Z(_lLNmh
} R=co2 5
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public static interface Sort { \LEUreTn
public void sort(int[] data); g><*qd?t
} izvwXC
O8mmS!
public static void swap(int[] data, int i, int j) { O]1aez[
int temp = data; -Uj3?W
data = data[j]; .7`c(9<
data[j] = temp; S^zt>
} p~evPTHnrX
} \46 'j.