[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; "9IYB)Js
} '$G"[ljr
int i1=l; 7Vu?
int i2=mid+1; }lP;U$
for(int cur=l;cur<=r;cur++){ BecPT
if(i1==mid+1) DZ$` 4;C[
data[cur]=temp[i2++]; Ml?~ |_
else if(i2>r) ,E;;wdIt
data[cur]=temp[i1++]; !8 -oR6/$%
else if(temp[i1] data[cur]=temp[i1++]; b>\?yL/%+?
else Aw5pd7qKL
data[cur]=temp[i2++]; v>Lm;q(
} 7j$Pt8$
} ~YP Jez
5O<>mCF
} l[Q:}y
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改进后的归并排序: :s={[KBP
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package org.rut.util.algorithm.support; @%/]Q<<q
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import org.rut.util.algorithm.SortUtil; m8R9{LC
Z[Qza13lo
/** "9!d]2.-Vk
* @author treeroot =<}<Ny
* @since 2006-2-2 ^n1%OzGK#
* @version 1.0 =,y |00l
*/ j.e0;! (L}
public class ImprovedMergeSort implements SortUtil.Sort { ~y HU^5D
wh6yPVVF/
private static final int THRESHOLD = 10; ]rehW}
xu5ia|gYz7
/* lot%N(mB`
* (non-Javadoc) =m89z}Ot
* &;yH@@Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vhbDb)J
*/ aNcd` $0
public void sort(int[] data) { -l~Z0U>^
int[] temp=new int[data.length]; Vd^g9
mergeSort(data,temp,0,data.length-1); x8Loyt_C
} Q;11N7+
2H71~~ c
private void mergeSort(int[] data, int[] temp, int l, int r) { k.<]4iS
int i, j, k; "Z Htr<+
int mid = (l + r) / 2; %^sTU4D5
if (l == r) o#) {1<0vg
return; ,}oM-B
if ((mid - l) >= THRESHOLD) *B`Zq)
mergeSort(data, temp, l, mid); O[tvR:Nh
else P-F)%T[
insertSort(data, l, mid - l + 1); ^b:(jI*l
if ((r - mid) > THRESHOLD) C~fjWz' V
mergeSort(data, temp, mid + 1, r); +$4(zPs@
else 8n1'x;
insertSort(data, mid + 1, r - mid); =qN2Xg/
SJD@&m%?[
for (i = l; i <= mid; i++) { P96pm6H_;
temp = data; zvABU+{jD
} DZzN>9<)^
for (j = 1; j <= r - mid; j++) { :0Z^uuk`gq
temp[r - j + 1] = data[j + mid]; (c0A.L)
} h(WrL
int a = temp[l]; NM ]bgpP
int b = temp[r]; [MuEoWrq(}
for (i = l, j = r, k = l; k <= r; k++) { ^N8)]F,
if (a < b) { U(~+o
data[k] = temp[i++]; !9 fz(9
a = temp; P[s8JDqu
} else { G)?9.t_Lj-
data[k] = temp[j--]; xsWur(>]
b = temp[j]; j ";2o(
} ECv)v
} j*~T1i
} [M+f-kl
^CwR!I.D}4
/** MZmb`%BZ
* @param data oK 6(HF'&
* @param l sz9L8f2
* @param i NcY608C
*/ @?h/B=56
private void insertSort(int[] data, int start, int len) { 1q;#VS/D;H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /x3/Ubmz~x
} Nk {XdrY
} 6e7{Iy
} 'Ei;^Y 1e
} &=4(l|wcg
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堆排序： ?yh}/T\qp
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package org.rut.util.algorithm.support; P./VmY'
#-h\.#s
import org.rut.util.algorithm.SortUtil; znJ'iVf
/lafve~
/** O]qU[y+
* @author treeroot LzYO$Ir:g
* @since 2006-2-2 ,^S@EDq
* @version 1.0 q4V7
*/ &N3Y|2
public class HeapSort implements SortUtil.Sort{ `9 {mr<
n-DVT;y
/* (non-Javadoc) RQMEBsI}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j;+?HbL
*/ |{,KRO0P
public void sort(int[] data) { bGorH=pb5R
MaxHeap h=new MaxHeap(); t=xOQ8
h.init(data); ^Idle*+
for(int i=0;i h.remove(); RxQh2<?
System.arraycopy(h.queue,1,data,0,data.length); YBnA+l*
} `)QCn<
Q);n<Z:X~
private static class MaxHeap{ &7_Qd4=08w
E#s)52z=B
void init(int[] data){ +}-@@,
this.queue=new int[data.length+1]; d[;.r
for(int i=0;i queue[++size]=data; +&["HoKg}&
fixUp(size); B*E2.\~
} x|{IwA9
} n#=o?!_4
san,|yrMn
private int size=0; +d|mR9^([
qgDRu]ba
private int[] queue; u!:z.RH8n
WQHd[2Z#e
public int get() { :\=CRaA
return queue[1]; It75R}B
} ;}'D16`j
M|] "W
public void remove() { 'KPASfC
SortUtil.swap(queue,1,size--); M5x U9]B
fixDown(1); (< =}]v
} ?)\a_Tn
file://fixdown ]TaN{"
private void fixDown(int k) { r0m*5rd1
int j; H}:LQ~_2
while ((j = k << 1) <= size) { qL94SW;
if (j < size %26amp;%26amp; queue[j] j++; G-T0f
if (queue[k]>queue[j]) file://不用交换 1J'3g
break; VAXT{s&4>
SortUtil.swap(queue,j,k); yOvm`9
k = j; \Y}3cE
} J sEa23
} X*L;.@xA
private void fixUp(int k) { B*gdgM*`
while (k > 1) { p7H3J?`w1+
int j = k >> 1; Xo*DvD
if (queue[j]>queue[k]) Uw4>v:
break; IMk'#)
SortUtil.swap(queue,j,k); WlYs~(=9
k = j; YA&g$!
} 7G)H.L)$m"
} Rml2"9"`
7w1wr)qSB
} DvM5 k
,y%3mR_~
} o:6@Kw^
0D8K=h&e
SortUtil： 0 &GRPu27
-)~SM&
package org.rut.util.algorithm; 3R&lqxhg
;us%/kOR
import org.rut.util.algorithm.support.BubbleSort; rcGb[=Bf
import org.rut.util.algorithm.support.HeapSort; %_Yx<wR%
import org.rut.util.algorithm.support.ImprovedMergeSort; a5G/[[cwTV
import org.rut.util.algorithm.support.ImprovedQuickSort; P4Th_B7
import org.rut.util.algorithm.support.InsertSort; t^ZV|s 1
import org.rut.util.algorithm.support.MergeSort; h!m_PgRSs
import org.rut.util.algorithm.support.QuickSort; +x1eJug4
import org.rut.util.algorithm.support.SelectionSort; sN("+ sZ.n
import org.rut.util.algorithm.support.ShellSort; 3<F </
*|_"W+JC
/** a {ab*tM
* @author treeroot {-A^g!jT&
* @since 2006-2-2 /\)a
* @version 1.0 iKas/8
*/ ]x&u`$F
public class SortUtil { 76vy5R(.
public final static int INSERT = 1; (5Sivw*mP
public final static int BUBBLE = 2; Ys!>+nL|
public final static int SELECTION = 3; X w.p
public final static int SHELL = 4; .Gcy>Av
public final static int QUICK = 5; 45&8weXO:'
public final static int IMPROVED_QUICK = 6; *.&HD6Qr
public final static int MERGE = 7; E\u#t$
public final static int IMPROVED_MERGE = 8; +-B^Z On
public final static int HEAP = 9; .ZMW>U>
i55x`>]&sb
public static void sort(int[] data) { LB/C-n.`
sort(data, IMPROVED_QUICK); dSCzx .c
} >*$;
private static String[] name={ bJ_cId8+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d^(1TNS
}; Db"DG(
y&_m4Zw"
private static Sort[] impl=new Sort[]{ i*eAdIi
new InsertSort(), >]=j'+]
new BubbleSort(), BGr.yEy
new SelectionSort(), {7MjP+\
new ShellSort(), A?Wk wf
new QuickSort(), ,i.%nZw\
new ImprovedQuickSort(), 7DlOW1|
new MergeSort(), vKoP|z=m
new ImprovedMergeSort(), ?GBkqQ
new HeapSort() D7"p}PD>~
}; Gs2p5nL<
H.G!A6bd
public static String toString(int algorithm){ %PJhy2
return name[algorithm-1]; 2u?zO7W)-L
} 1nPZ<^A&@
*V(Fn-6(
public static void sort(int[] data, int algorithm) { Q:6VYONN
impl[algorithm-1].sort(data); !G_jGc=v
} X5 ITF)&
F^!mI7Z|(2
public static interface Sort { 0uCT+-
public void sort(int[] data); YxJD_R
} buk=p-oi
2=ztKfsBhE
public static void swap(int[] data, int i, int j) { kcB+_
int temp = data; DG;y6#|p
data = data[j]; W4YE~
data[j] = temp; T@^]i&
} (bn Zy0
} FbACTeB