[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; =PY{Elf
} T16gq-h'
int i1=l; ;_SSR8uHv
int i2=mid+1; ]e),#_M
for(int cur=l;cur<=r;cur++){ "p3<-06
if(i1==mid+1) %y9sC1T
data[cur]=temp[i2++]; g_{N^wS
else if(i2>r) 6)0.q|Q
data[cur]=temp[i1++]; '*L6@e#U
else if(temp[i1] data[cur]=temp[i1++]; M.,DXEZT
else l'q%bi=f
data[cur]=temp[i2++]; sgP{A}4 W
} hDTC~~J/
} .]h/M,xg
W/\VpD) ?;
} Z8Ig,
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改进后的归并排序: @@^iN~uf
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package org.rut.util.algorithm.support; pTi7Xy!Cw
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import org.rut.util.algorithm.SortUtil; ~n@rX=Y)]0
z H-a%$5
/** 'WhJ}Uo\
* @author treeroot O'IU1sU
* @since 2006-2-2 Q<u?BA/
* @version 1.0 :8eI_X
*/ sM MtU@<x
public class ImprovedMergeSort implements SortUtil.Sort { x5MS#c!7
zMA;1Na
private static final int THRESHOLD = 10; e`b#,=
E"VFBKB
/* J;Z2<x/H
* (non-Javadoc) O<Q8%Az
* &kzysv-_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M1WD^?tKQ.
*/ z]rr Q=dAA
public void sort(int[] data) { .B<Bqr@?8
int[] temp=new int[data.length]; +@^);b6
mergeSort(data,temp,0,data.length-1); l3p :}A
} ~Z/,o)
Q;VuoHj!
private void mergeSort(int[] data, int[] temp, int l, int r) { o/7u7BQl2
int i, j, k; +'c+X^_
int mid = (l + r) / 2; >Y8\f:KQ
if (l == r) uarfH]T{
return; xE@/8h
if ((mid - l) >= THRESHOLD) So!=uYX
mergeSort(data, temp, l, mid); gZ^Qt.6Z
else QPB,B>Z
insertSort(data, l, mid - l + 1); u#EcR}=]
if ((r - mid) > THRESHOLD) XEA5A.uc
mergeSort(data, temp, mid + 1, r); cQhr{W,Un
else B%uY/Mwz$
insertSort(data, mid + 1, r - mid); k*)sz
YhV<.2^k
for (i = l; i <= mid; i++) { "g5{NjimY
temp = data; F<b'{qf"
} ':;k<(<-
for (j = 1; j <= r - mid; j++) { tgG*k$8z
temp[r - j + 1] = data[j + mid]; m=l'9j"D
} K [DpH&
int a = temp[l]; $4xSI"+M%
int b = temp[r]; aA#79LS
for (i = l, j = r, k = l; k <= r; k++) { {,sqUq (
if (a < b) { AcuF0KWw/
data[k] = temp[i++]; tjFX(;^[
a = temp; V>T?'GbS
} else { ~C%I'z'
data[k] = temp[j--]; nI]EfHU
b = temp[j]; <7Pp98si,u
} \fTQNF
} !\4B.
} ?nW>'z
T#-;>@a}
/** la+Cra&xL
* @param data h97#(_wV>
* @param l 6qZ\^ U
* @param i A811VL^
*/ ErNYiYLi]
private void insertSort(int[] data, int start, int len) { Tp;W4]'a*:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A_9^S!
} ]S&ki}i&
} Su,:f_If,
} !-7n69:G
} iWD|F-
Z,#H\1v3lB
堆排序： 0i_:J
klJ21j0Bb2
package org.rut.util.algorithm.support; rT[qh+KWe
2.z-&lFBZ
import org.rut.util.algorithm.SortUtil; qMJJBl
viAAb
/** yV8J-YdsG
* @author treeroot vO1; ;
* @since 2006-2-2 6`CRT TJ7
* @version 1.0 EWD^=VITL
*/ _F%`7j
public class HeapSort implements SortUtil.Sort{ 4c< s"2F
#3qeRl
/* (non-Javadoc) nFn!6,>E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z;S-Q,
*/ 3>1^$0iq
public void sort(int[] data) { Y/.C+wW2
MaxHeap h=new MaxHeap(); p?Azn>qBa
h.init(data); lNL=Yu2p_
for(int i=0;i h.remove(); AVpg
System.arraycopy(h.queue,1,data,0,data.length); \Vf:/9^
} g&FTX>wX
g.Xk6"kO
private static class MaxHeap{ %)r ~GCd
r+FEgSDa]
void init(int[] data){ Gc|)4c
this.queue=new int[data.length+1]; mtv8Bm=<
for(int i=0;i queue[++size]=data; @[3c1B6K
fixUp(size); tNTSy=
} YGyv)\
} ps 3)d
k|)fl l
private int size=0; ?A3L8^tR
%rptI$^*X
private int[] queue; _f[Q\gK
XH!#_jy
public int get() { KRaL+A
return queue[1]; .ImaM
} cFL~< [>_
ZkbE&7Z
public void remove() { 8v;^jo>ug
SortUtil.swap(queue,1,size--); |Ghk8 WA
fixDown(1); Q6Gw!!Z5EA
} zi-_l
file://fixdown `}PYltW
private void fixDown(int k) { 7s(tAbPdB
int j; /WTEz\k
while ((j = k << 1) <= size) { O]u'7nO{{
if (j < size %26amp;%26amp; queue[j] j++; "Q.*
if (queue[k]>queue[j]) file://不用交换 O_:l;D#i
break; X.t4;
SortUtil.swap(queue,j,k); q?(] Y*
k = j; Yb+A{`
} OT{"C"%5t
} *1dDs^D#|
private void fixUp(int k) { ~skp}g]
while (k > 1) { v=N?(6T
int j = k >> 1; GDxv2^4
if (queue[j]>queue[k]) A8Ju+
break; glMHT,
SortUtil.swap(queue,j,k); Ha@;Sz<R
k = j; T`EV uRJ
} iQ/~?'PB
} I'uwJy_I\
Z4] n<~o
} 5}#wp4U
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} \Rny*px
(&:gD4.
SortUtil： dVQ[@u1,
X06Lr!-%
package org.rut.util.algorithm; I_J&>}V'
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import org.rut.util.algorithm.support.BubbleSort; BR2Gb~#T
import org.rut.util.algorithm.support.HeapSort; po*G`b;v
import org.rut.util.algorithm.support.ImprovedMergeSort; I^?tF'E
import org.rut.util.algorithm.support.ImprovedQuickSort; kU<t~+
import org.rut.util.algorithm.support.InsertSort; l[}4 X/
import org.rut.util.algorithm.support.MergeSort; c2npma]DZ
import org.rut.util.algorithm.support.QuickSort; tq3_az ~1
import org.rut.util.algorithm.support.SelectionSort; ;m(iKwDt
import org.rut.util.algorithm.support.ShellSort; sl]<A[jR
E#k{<LYI
/** MYAt4cHc2
* @author treeroot w_(3{P[Iz
* @since 2006-2-2 wX,V:QE
* @version 1.0 YFO{i-*q
*/ YT\@fgBt
public class SortUtil { g$nS6w|5H
public final static int INSERT = 1; ?E([Nc0T
public final static int BUBBLE = 2; P\jGySj
public final static int SELECTION = 3; JVE\{ e)
public final static int SHELL = 4; & LE5'.s
public final static int QUICK = 5; &R94xh%@(
public final static int IMPROVED_QUICK = 6; &|hK79D
public final static int MERGE = 7; :?t~|7O:
public final static int IMPROVED_MERGE = 8; 2c9?,Le/;
public final static int HEAP = 9; ]b4WfIu
*M.xVUPr
public static void sort(int[] data) { 4%(Ji
sort(data, IMPROVED_QUICK); fj_23{,/"g
} {7NGfzwp;6
private static String[] name={ wcGK*sWG-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S#/%#k103
}; *pKTJP
P49\A^5S!
private static Sort[] impl=new Sort[]{ @+u>rS|IB
new InsertSort(), d ]P~
new BubbleSort(), &k}f"TX2
new SelectionSort(), "s+4!,k
new ShellSort(), r"7n2
new QuickSort(), 4DA34m(
new ImprovedQuickSort(), b9.M'P\
new MergeSort(), 5~*)3z^V
new ImprovedMergeSort(), pCIzpEsRs
new HeapSort() %$!3Pbui
}; COrk (V
Rr)+M3'
public static String toString(int algorithm){ Jz@~$L
return name[algorithm-1]; ?8b19DMK6
} !|cg=
GtA`0B
public static void sort(int[] data, int algorithm) { P?54"$b
impl[algorithm-1].sort(data); +EETo):
} FcDS*ZEk!
8t-GsjHb
public static interface Sort { ',+yD9 @
public void sort(int[] data); BrV{X&>[i
} Z~5) )5Ye;
xUo6~9s7
public static void swap(int[] data, int i, int j) { m~=~DMj
int temp = data; $<}c[Nm
data = data[j]; #~u0R>=
data[j] = temp; LFp "Waiv
} ks'>?Dw
} (Fv tL*