[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; a[cH@7W.#
} E=*Q\3G~
int i1=l; wEc5{ b5M
int i2=mid+1; 7CMgvH)O
for(int cur=l;cur<=r;cur++){ cH-Zj
if(i1==mid+1) n4&j<zAV{
data[cur]=temp[i2++]; ']Xx#U N
else if(i2>r) (g:W|hS
data[cur]=temp[i1++]; <\~#\A=;
else if(temp[i1] data[cur]=temp[i1++]; B@vH1T
else ,:4w$!;
data[cur]=temp[i2++]; }UdqX1jz
} E d/O\v@
} _NnOmwK7
H 7F~+Q-}
} o5XUDDi
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改进后的归并排序: 0_pwY=P
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package org.rut.util.algorithm.support; R.`J"J0/~
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import org.rut.util.algorithm.SortUtil; c qyh#uWe
[ =2In;
/** 7Ej#7\TB]
* @author treeroot L5uI31
* @since 2006-2-2 x2wWp-Z
* @version 1.0 '|?r&-5 h
*/ D?F5o^e"h<
public class ImprovedMergeSort implements SortUtil.Sort { 2`U&,,-Mf
V\hct$ 7Vm
private static final int THRESHOLD = 10; j5GZ;d?
M%^laf
/* 6lAo`S\)eX
* (non-Javadoc) )9Ojvp=#r:
* :uDB3jN[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N,Bs% p#1
*/ qM !q,Q
public void sort(int[] data) { U7eQ-r
int[] temp=new int[data.length]; G.e\#_RR?
mergeSort(data,temp,0,data.length-1); .Awq(
} !I/kz }N@
N|vJrye
private void mergeSort(int[] data, int[] temp, int l, int r) { FRk_xxe"K
int i, j, k; Tic9ri
int mid = (l + r) / 2; 6&0a?Xu
if (l == r) /k"P4\P`+Q
return; ADz|Y~V!
if ((mid - l) >= THRESHOLD) bQjHQ"G
mergeSort(data, temp, l, mid); 3*JybMo"
else >G~;2K[
insertSort(data, l, mid - l + 1); MA6%g} o
if ((r - mid) > THRESHOLD) &>fd:16
mergeSort(data, temp, mid + 1, r); [KJL%u|8/
else :C6rN}_k
insertSort(data, mid + 1, r - mid); Z5-'|h$|
t O>qd#I
for (i = l; i <= mid; i++) { Lpf=VyqC
temp = data; v72 dE
} 7Z3qaXPH
for (j = 1; j <= r - mid; j++) { :|3C-+[
temp[r - j + 1] = data[j + mid]; c?",kzo
} }TvAjLIS6
int a = temp[l]; o2jB~}VMl
int b = temp[r]; '=* 5C{
for (i = l, j = r, k = l; k <= r; k++) { Ft!~w#&-
if (a < b) { 59 Y=VS
data[k] = temp[i++]; ;gV8f{X{Z
a = temp; )^sfEYoA
} else { u;g}N'"
data[k] = temp[j--]; [rsAY&.
b = temp[j]; cA2]VL.r>C
} Sn&%epi
} Y|nTc.A
} eqCB2u"Jq
R"([Y#>m
/** }2oJ
* @param data O9)8a]
* @param l ^%JWc 3jZ
* @param i tH(#nx8
*/ ,-kZ5&r
private void insertSort(int[] data, int start, int len) { i(HhL&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^O m]B;
} %b6wo?%*
} \_bX2Lg
} Njjeg9f
} S:QEHd_C
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堆排序： Y,~]ecI
<~w#sIh
package org.rut.util.algorithm.support; 7RJW
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import org.rut.util.algorithm.SortUtil; LL+rdxJO^
u*`GIRfWT
/** 9t1_"{'N1
* @author treeroot 74#@F{w
* @since 2006-2-2 Lp=B? H
* @version 1.0 Qpq0j^\
*/ {*9i}w|2
public class HeapSort implements SortUtil.Sort{ 8<!9mgh
UUq9UV-h
/* (non-Javadoc) yr'`~[oSCy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kq-RM#Dj:
*/ E@KK\m \e
public void sort(int[] data) { iI0'z=J
MaxHeap h=new MaxHeap(); \-yi#N
h.init(data); 6I0MJpLW
for(int i=0;i h.remove(); g*M3;G
System.arraycopy(h.queue,1,data,0,data.length); O~VUViS6$
} %BKTN@;7
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private static class MaxHeap{ |0-L08DW
$49tV?q5
void init(int[] data){ } _z~:{Y
this.queue=new int[data.length+1]; 6:pN?|=6X
for(int i=0;i queue[++size]=data; Y~!@
fixUp(size); v%^H9aK_
} LlJvuQ 28
} d+'+z %s%
}kDrUnBk
private int size=0; sx\7Z#|
^*OA%wg3=h
private int[] queue; o++Hdvai
C7PiuL?
public int get() { C2v7(
return queue[1]; H<"j3qt
} i1C'
<0m;|Ai'W
public void remove() { R?Qou!*]
SortUtil.swap(queue,1,size--); J:a^''
fixDown(1); psVRdluS
} ~-/AKaK}
file://fixdown {Xj%JE[V
private void fixDown(int k) { T9A5L"-6T
int j; 9'M_tMm5
while ((j = k << 1) <= size) { d?n~9_9e
if (j < size %26amp;%26amp; queue[j] j++; L z
if (queue[k]>queue[j]) file://不用交换 VbYapPu4b!
break; _?"J.i
SortUtil.swap(queue,j,k); ( 9l|^w["
k = j; K]l)z* I
} plq\D.C
} 14R))Dz"
private void fixUp(int k) { r[~$
while (k > 1) { .B*)A.
int j = k >> 1; qz&)|~,\C
if (queue[j]>queue[k]) 0% /M& N
break; "oQ@.]-#
SortUtil.swap(queue,j,k); KVCS(oN
k = j; N.?Wev{
} ~08v]j q
} *bx cq
n|.;g!QDA
} "`k[4C
YS*t7
} OsXQWSkj~
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SortUtil： __M}50^
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package org.rut.util.algorithm; [g? NU]
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import org.rut.util.algorithm.support.BubbleSort; @WmB0cc_
import org.rut.util.algorithm.support.HeapSort; Evc 9k
import org.rut.util.algorithm.support.ImprovedMergeSort; &}r932
import org.rut.util.algorithm.support.ImprovedQuickSort; KB^IGF
import org.rut.util.algorithm.support.InsertSort; 5eYCnc9
import org.rut.util.algorithm.support.MergeSort; 0U<9=[~q7@
import org.rut.util.algorithm.support.QuickSort; uD"Voh|]=
import org.rut.util.algorithm.support.SelectionSort; =ZQIpc
import org.rut.util.algorithm.support.ShellSort; e#wn;wo?
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/** bpzA ' g>
* @author treeroot <bH>\@p7}
* @since 2006-2-2 Z&%61jGK
* @version 1.0 waC%o%fD
*/ VYBl0!t
public class SortUtil { cmTZ))m
public final static int INSERT = 1; D+V^nCcx%
public final static int BUBBLE = 2; 8Y9mB#X
public final static int SELECTION = 3; 7"NUof?i
public final static int SHELL = 4; 7j Q`i;L}Y
public final static int QUICK = 5; l},%g%}iMU
public final static int IMPROVED_QUICK = 6; p82qFzq#
public final static int MERGE = 7; i=ba=-"Mt
public final static int IMPROVED_MERGE = 8; ]O[f#lG
public final static int HEAP = 9; o|+tRl
F~B8XUa3
public static void sort(int[] data) { Ah,Zm4:
sort(data, IMPROVED_QUICK); nT>?}/S
} Oj:`r*z43
private static String[] name={ Lv_>cFJ}[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SG~R!kN}Q
}; fKfi
,O2F}5|;
private static Sort[] impl=new Sort[]{ ;23F8M%wH
new InsertSort(), (w.B_9#
new BubbleSort(), Pw")|85
new SelectionSort(), l6&R g-
new ShellSort(), U5klVl
new QuickSort(), R1nctA:
new ImprovedQuickSort(), 8wBns)wy@
new MergeSort(), |^1eL I
new ImprovedMergeSort(), jkbz8.K
new HeapSort() * .e^s3q$
}; dG| iA]
=X`/.:%|[
public static String toString(int algorithm){ /<})+=>6f
return name[algorithm-1]; Zy'bX* s|
} 7 MfpZgC
u$0>K,f
public static void sort(int[] data, int algorithm) { 8S0)_L#S
impl[algorithm-1].sort(data); w4OVfTlN
} 'j.{o
Rk'Dd4"m,
public static interface Sort { P=h2Z,2
public void sort(int[] data); a7+BAma<
} MG~^>
O:#to
public static void swap(int[] data, int i, int j) { m,pDjf
int temp = data; $oNkE
data = data[j]; NmeTp?)m
data[j] = temp; A >x{\
} M4QMD;Ez
} C}Khh`8@5.