[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; ?o2L
} t2>Vj>U
int i1=l; wNn6".S
int i2=mid+1; ral0@\T
for(int cur=l;cur<=r;cur++){ P69S[aqW
if(i1==mid+1) "Mth<%i
data[cur]=temp[i2++]; O:4.xe
else if(i2>r) I/c* ?
data[cur]=temp[i1++]; |,o!O39}>
else if(temp[i1] data[cur]=temp[i1++]; ~%cbp&s*/q
else JHcC}+H[
data[cur]=temp[i2++]; N G4wtDa
} xRb-m$B}L
} UPH:$Fk&
>#SQDVFf
} l78zS'
|VIBSty2d
改进后的归并排序: k@^)>J^
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package org.rut.util.algorithm.support; {JMFCc[
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import org.rut.util.algorithm.SortUtil; {A{=RPL
C;_10Rb2ut
/** C]82Mt
* @author treeroot 0EOpK%{
* @since 2006-2-2 t68h$u
* @version 1.0 aB.`'d)V
*/ dF"Sz4DY#
public class ImprovedMergeSort implements SortUtil.Sort { q*8^938
V#zDYrp
private static final int THRESHOLD = 10; VB\oK\F5z
;a2TONW
/* :Fm)<VN"
* (non-Javadoc) 7i`8 c =.
* y8VLFe;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x,pzX(
*/ >J+hu;I5
public void sort(int[] data) { 1-4W4"#
int[] temp=new int[data.length]; =JY9K0S~
mergeSort(data,temp,0,data.length-1); 6s@'z<Ct
} w`q):yXX
lUbQ@7a<'
private void mergeSort(int[] data, int[] temp, int l, int r) { &^92z:?
int i, j, k; /aP4'U8ov
int mid = (l + r) / 2; X0O@,
if (l == r) g^/
return; C[z5& x2
if ((mid - l) >= THRESHOLD) @Pb!:HeJE
mergeSort(data, temp, l, mid); 1*,f
else LNPwb1)
insertSort(data, l, mid - l + 1); y ~7]9?T
if ((r - mid) > THRESHOLD) 0x*L"HD
mergeSort(data, temp, mid + 1, r); eJlTCXeZ|
else ]X%T^3%G
insertSort(data, mid + 1, r - mid); x8+W9i0[1
i{vM NI{
for (i = l; i <= mid; i++) { bVaydJ*
temp = data; )5Mf,
} e@|/, W
for (j = 1; j <= r - mid; j++) { S2T~7-
temp[r - j + 1] = data[j + mid]; nO.RB#I$F
} [oqb@J2
int a = temp[l]; (pJ-_w'G
int b = temp[r]; {a;my"ly
for (i = l, j = r, k = l; k <= r; k++) { RsU!mYs:H
if (a < b) { pCb3^# &o
data[k] = temp[i++]; N{w)}me[YY
a = temp; &]~Vft l
} else { OiAP%7i9
data[k] = temp[j--]; HY|=Z\l"
b = temp[j]; _8]hn[
} IY jt*p5
} {kVhht]X
} jg%HaA<zO
^FJ.C|l(
/** `_M*2(rt
* @param data 2GkJ7cL
* @param l bLSXQStB
* @param i cG{>[Lf
*/ x"7`,W
private void insertSort(int[] data, int start, int len) { <e)5$Aj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OZ2YflT
} AXBf\)[
} Bg3`w__l;
} j6@5"wx
} TX/Ng+v S
~m@v ~=
堆排序： /8](M5X]f
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package org.rut.util.algorithm.support; ZoFQJJK56B
x|3f$ =b
import org.rut.util.algorithm.SortUtil; )3 C~kmN7
=gG_ %]``R
/** s{q)P1x
* @author treeroot BM6 J
* @since 2006-2-2 ,AX7~;hpq
* @version 1.0 ~ 8hAmM
*/ -^a?]`3_v
public class HeapSort implements SortUtil.Sort{ vbXZZ
WcE{1&PXx
/* (non-Javadoc) q>JW$8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \*24NB
*/ gtizgUS7
public void sort(int[] data) { 7*D*nY4+
MaxHeap h=new MaxHeap(); RfM uWo:
h.init(data); `F)Q=
for(int i=0;i h.remove(); ">?ocJ\9
System.arraycopy(h.queue,1,data,0,data.length); +1`Zu$|
} >=<qAkk
^Md]e<WAp
private static class MaxHeap{ ~}B6E)
86.LkwlqoH
void init(int[] data){ D'dE!CAUs
this.queue=new int[data.length+1]; fevLu[,
for(int i=0;i queue[++size]=data; hX?rIx
fixUp(size); 3M/iuu
} >O7ITy
} ,}9G|$
\M@9#bd
private int size=0; ?2#!63[Kg
<ZF,3~v?
private int[] queue; q(N2#di
5P?7xRA
public int get() { u9d4zR
return queue[1]; ;H%&Jht
} 1-HL#y*7$
vY+{zGF
public void remove() { =N_7DT
SortUtil.swap(queue,1,size--); gnAM}
fixDown(1); 1pT v6
} BE&P/~(C
file://fixdown t>W^^'=E
private void fixDown(int k) { P>*g'OK^!G
int j; 5IK -V)
while ((j = k << 1) <= size) { |*~=w J_
if (j < size %26amp;%26amp; queue[j] j++; /3MTutM|<X
if (queue[k]>queue[j]) file://不用交换 ^LA.Y)4C2%
break; 50s)5G#
SortUtil.swap(queue,j,k); 6usy0g D
k = j; c&A;0**K,
} R.(cGZS
} 3YtFO;-
private void fixUp(int k) { ?DN4j!/$
while (k > 1) { cfb8kNn~+
int j = k >> 1; auV'`PR
if (queue[j]>queue[k]) 2u0dn?9\
break; ~2R3MF.C
SortUtil.swap(queue,j,k); .JR"|;M}
k = j; X>i`z
} oD5VE
} gq$]jWtCD
k\:f2%!!
} ##%R|P3
U}c[oA
} x]({Po4
Tk9/1C{8
SortUtil： ,n')3r
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package org.rut.util.algorithm; 0baq696<F
Z;/"-.i
import org.rut.util.algorithm.support.BubbleSort; qO5.NIs
import org.rut.util.algorithm.support.HeapSort; Ov vM)?^#
import org.rut.util.algorithm.support.ImprovedMergeSort; ?0Xt|
import org.rut.util.algorithm.support.ImprovedQuickSort; NXAP=y3
import org.rut.util.algorithm.support.InsertSort; P,S$qD*4
import org.rut.util.algorithm.support.MergeSort; #8N9@
import org.rut.util.algorithm.support.QuickSort; ^k&T?uU
import org.rut.util.algorithm.support.SelectionSort; dHU#Y,v
import org.rut.util.algorithm.support.ShellSort; Vt_NvPB`
1dhp/Qh
/** ]jWe']T
* @author treeroot T=8>0D^v5
* @since 2006-2-2 0:(`t~
* @version 1.0 gnS0$kCJ:
*/ a8?Zb^
public class SortUtil { #S[:Q.0 ;
public final static int INSERT = 1; (-\,t
public final static int BUBBLE = 2; E'p5
public final static int SELECTION = 3; []K5l%
public final static int SHELL = 4; AT^?PD_
public final static int QUICK = 5; (7nWv43
public final static int IMPROVED_QUICK = 6; aX=
public final static int MERGE = 7; 6gS<h\h0
public final static int IMPROVED_MERGE = 8; -I1Ne^DZn4
public final static int HEAP = 9; Sr_]R<?
P;>8S:8
public static void sort(int[] data) { NpRT\cx3
sort(data, IMPROVED_QUICK); a;p3Me7
} +p =n-
private static String[] name={ ]R^?Pa1Te4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;4nz'9+
}; ?i*kwEj=
=K#D^c~
private static Sort[] impl=new Sort[]{ RdlcJxM
new InsertSort(), M%f96XUM
new BubbleSort(), Y_&D W4
new SelectionSort(), wK@k}d
new ShellSort(), }Vw"7
new QuickSort(), &?(r#T
new ImprovedQuickSort(), Q7`}4c)
new MergeSort(), dBY,&=T4p
new ImprovedMergeSort(), #RoGyrLo
new HeapSort() 4oLrCQZ\
}; (3C6'Wt
kUAjQ>
public static String toString(int algorithm){ SP9_s7LL
return name[algorithm-1]; 1btQ[a6j
} >\hu1C|W
n~\"W
public static void sort(int[] data, int algorithm) { qp>O#tj[
impl[algorithm-1].sort(data); > TG:}H(J
} ;5 cg<~t
h^ ex?
public static interface Sort { vj<HthC.k
public void sort(int[] data); tWVbD%u^
} Z^9;sb,x
epi{Ayb
public static void swap(int[] data, int i, int j) { %fMK^H8{
int temp = data; fB[I1Z
data = data[j]; >6 [{\uPK
data[j] = temp; g$eb@0$
} ~a&s5E {
} -Cv:lJj