[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; _)q,:g~fu
} OUY65K
int i1=l; PvzB, 2":
int i2=mid+1; 8ODrW!o
for(int cur=l;cur<=r;cur++){ MQR@(>TZy
if(i1==mid+1) SwESDo)
data[cur]=temp[i2++]; kaxAIk8l
else if(i2>r) pN+lC[C
data[cur]=temp[i1++]; iJg3`1@j
else if(temp[i1] data[cur]=temp[i1++]; z6tH2Wxf
else ' LT6%<|
data[cur]=temp[i2++]; s=lkK/ [
} *KP 60T
} RlU=
ni#!Gxw
} :@6,|2be=
~eH+*U|\|M
改进后的归并排序: ;!(.hCHvr
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package org.rut.util.algorithm.support; ?XVJ$nzW
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import org.rut.util.algorithm.SortUtil; /? n 9c;w
Ak!l}d
/** gt3;Xi
* @author treeroot djVE x}
* @since 2006-2-2 fu/v1Nhm
* @version 1.0 pU`4bT(w%
*/ K (yuL[p`
public class ImprovedMergeSort implements SortUtil.Sort { %2=nS<kC
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private static final int THRESHOLD = 10; DCfV
PgZ~of&
/* fL7ym,?
* (non-Javadoc) ^Bihm] Aq
* >= Hcw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %=J<WA6\
*/ wVD-}n1"
public void sort(int[] data) { Qc2_B\K^
int[] temp=new int[data.length]; `, ?T;JRc
mergeSort(data,temp,0,data.length-1); C[:Q?LE
} 7kM_Ijd$
FJ3Xeos4|
private void mergeSort(int[] data, int[] temp, int l, int r) { pmAir:
int i, j, k; :0Nd4hA
int mid = (l + r) / 2; -b-Pvw4
if (l == r) v2 [ l$
return; STp}?Cb
if ((mid - l) >= THRESHOLD) 7SE=otZ>
mergeSort(data, temp, l, mid); Y418k
else w/s{{X<bF
insertSort(data, l, mid - l + 1); j r6)K;:.
if ((r - mid) > THRESHOLD) |MvCEp
mergeSort(data, temp, mid + 1, r); 5EDM?G
else WF<0QH
insertSort(data, mid + 1, r - mid); { hUbK+dKZ
krm&.J
for (i = l; i <= mid; i++) { -\yaP8V
temp = data; .H+`]qLkL
} P-ma~g>I
for (j = 1; j <= r - mid; j++) { @AL,@P/9=
temp[r - j + 1] = data[j + mid]; }9e4?7
} 0q"&AxNsP
int a = temp[l]; ?lCKZm.,(-
int b = temp[r]; !8ub3oj)
for (i = l, j = r, k = l; k <= r; k++) { mfLS</A
if (a < b) { ,dKcxp~[
data[k] = temp[i++]; :h1itn
a = temp; CDei+ q
} else { >:5/V0;,
data[k] = temp[j--]; ciI;U/V
b = temp[j]; vBQ|h
} xtN%v0ZZ
} 4`)B@<
} 5#+!|S[PK
swuW6p
/** R@t?!`f!+
* @param data F?e_$\M
* @param l dkJ+*L5
* @param i {[o=df/
*/ Z6SM7?d
private void insertSort(int[] data, int start, int len) { %v:9_nwO)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -uenCWF\#
} @v_ )(
} hT9fqH
} L~SM#?z:ue
} TIlcdpwXf
>f4H<V-
堆排序： e?3 S0}
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package org.rut.util.algorithm.support; ~c,HE] B
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import org.rut.util.algorithm.SortUtil; "'-f?kZ
5E?{>1
/** 2Q,e1'=
* @author treeroot qYZX, x
* @since 2006-2-2 ?8fa/e
* @version 1.0 Xa\{WM==;
*/ ]wWN~G)2lV
public class HeapSort implements SortUtil.Sort{ "zJ1vIZY
wqJ^tA!
/* (non-Javadoc) G+[hE|L~y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D`,W1Z#
*/ xq-R5(k
public void sort(int[] data) { i5w
MaxHeap h=new MaxHeap(); a,x-akZWf
h.init(data); TB\#frG
for(int i=0;i h.remove(); -("sp
System.arraycopy(h.queue,1,data,0,data.length); IQf:aX
} 2G<\Wz
1|l'oTAA
private static class MaxHeap{ u;H SX
8-3]Bm!
void init(int[] data){ F\F_">5
this.queue=new int[data.length+1]; }p$>V,u
for(int i=0;i queue[++size]=data; "C&l7K;bp
fixUp(size); QI'ule
} d}j%.JJK
} sxinA8
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private int size=0; C;];4[XR
W0J d2*]
private int[] queue; {DJ!T
"bZ%1)+
public int get() { X*hY?'Rp
return queue[1]; |N/Grk4
} | s%--W
C?m2R(RF
public void remove() { uMKO^D
SortUtil.swap(queue,1,size--); jI%v[]V
fixDown(1); "7}bU_":s
} o|O730"2F
file://fixdown #{KYsDtvx
private void fixDown(int k) { ,r^zDlS<q
int j; W6J%x[>Z
while ((j = k << 1) <= size) { 1=:=zyEEo
if (j < size %26amp;%26amp; queue[j] j++; $X<O\Kna
if (queue[k]>queue[j]) file://不用交换 Ro3C(aRx
break; F3+ ;2GG2
SortUtil.swap(queue,j,k); Yw @)0%G
k = j; g<U\7Vp\1
} ;]c@%LX
} N$]B$vv
private void fixUp(int k) { " E+V>V+
while (k > 1) { 8p D$/
int j = k >> 1; OBY^J1St
if (queue[j]>queue[k]) X)7_@,7
break; vDI$ QUMD6
SortUtil.swap(queue,j,k); X<G"GaL
k = j; "?9rJx$
} tSibzl~
} x6yYx_
DR]=\HQ
} (~S=DFsP
kIl!n
} FK;3atrz
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SortUtil： "06t"u<%
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package org.rut.util.algorithm; 7)Cn 4{B6
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import org.rut.util.algorithm.support.BubbleSort; H@,h$$
import org.rut.util.algorithm.support.HeapSort; }ejZk bP
import org.rut.util.algorithm.support.ImprovedMergeSort; W*2d!/;7>
import org.rut.util.algorithm.support.ImprovedQuickSort; \-?0ab3Z
import org.rut.util.algorithm.support.InsertSort; p~Wy`g-
import org.rut.util.algorithm.support.MergeSort; KBC?SxJSJc
import org.rut.util.algorithm.support.QuickSort; WwDd62g
import org.rut.util.algorithm.support.SelectionSort; #jj+/>ZOi
import org.rut.util.algorithm.support.ShellSort; i}Q"'?
lcVZ 32MQ
/** S:(YZ%#
* @author treeroot wK]p`:3
* @since 2006-2-2 gwGw
* @version 1.0 X 0vcBHh
*/ G!T_X*^q2U
public class SortUtil { %6.WGuO
public final static int INSERT = 1; ;kDUQw
public final static int BUBBLE = 2; 2A=q{7s
public final static int SELECTION = 3; I+{2DY/}
public final static int SHELL = 4; q0C%">>1#
public final static int QUICK = 5; emSky-{$u
public final static int IMPROVED_QUICK = 6; Z% DJ{!Hnh
public final static int MERGE = 7; xyD2<?dGUb
public final static int IMPROVED_MERGE = 8; j:2TicHDC
public final static int HEAP = 9; vf5q8/a
[H[L};%=j
public static void sort(int[] data) { xx@[ecW
sort(data, IMPROVED_QUICK); =Y-.=}jp;
} \,xa_zeO
private static String[] name={ h! Bg}B~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e9RH[:
}; B*(BsXQLY
?9;CC]D
private static Sort[] impl=new Sort[]{ VOJ/I Dl 4
new InsertSort(), jF@BWPtF=
new BubbleSort(), -UM|u_
new SelectionSort(), I_m3|VCa|t
new ShellSort(), %8H$62w]
new QuickSort(), *_Vv(H&
new ImprovedQuickSort(), _7z]zy@PC5
new MergeSort(), q3vv^~
new ImprovedMergeSort(), "}"/d(
new HeapSort() *c\XQy
}; 2!6E~<~HC
,5V6=pr$
public static String toString(int algorithm){ ^TD%l8o6
return name[algorithm-1]; NLra"Z
} J'ZC5Xr
=w* 8
public static void sort(int[] data, int algorithm) { H|_@9V
impl[algorithm-1].sort(data); wz)s
} gW<6dP'v
;Xf1BG r
public static interface Sort { ] s^7c
public void sort(int[] data); Y0Tad?iC
} tz8fZ*n
Qd~z<U l
public static void swap(int[] data, int i, int j) { `#'j3,\6
int temp = data; 'pT13RFD
data = data[j]; Yj'9|4%+|
data[j] = temp; /* qx5$~
} ">G*hS
} oN[}i6^,e