[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; _T.T[%-&=
} ;9;jUQ]MyG
int i1=l; bLsN?_jy
int i2=mid+1; ':d9FzGKa
for(int cur=l;cur<=r;cur++){ cGM?r}zJ
if(i1==mid+1) YZy%]i=1
data[cur]=temp[i2++]; ;q33t%j
else if(i2>r) Sa9p#OQ
data[cur]=temp[i1++]; FY9nVnIoI
else if(temp[i1] data[cur]=temp[i1++]; kXN8hU}iq
else R ~?9+
data[cur]=temp[i2++]; yvCX is
} w6
} dZkj|Ua~
uskJ(!
} g3| 62uDF
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改进后的归并排序: X:JU#sI
@[v4[yq-
package org.rut.util.algorithm.support; *J3Z.fq%:i
%~I%*=o[
import org.rut.util.algorithm.SortUtil; 2l}H=DZV
Oj1B @QE
/** 9j>LU<Z
* @author treeroot G%MdZg&i
* @since 2006-2-2 Z8I0v$LjR
* @version 1.0 =rN_8&
*/ ih=O#f|
public class ImprovedMergeSort implements SortUtil.Sort { 3H`r|R
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private static final int THRESHOLD = 10; m\f}?t
Ksff]##H
/* q0*d*j F0u
* (non-Javadoc) F;8Uvj
* x31Jl{x8\?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .23Yqr'zT
*/ J+uz{
public void sort(int[] data) { gaU(ebsE
int[] temp=new int[data.length]; n{"e8vQx
mergeSort(data,temp,0,data.length-1); u>*d^[zS
} %9OVw#P
ZC97Z sE
private void mergeSort(int[] data, int[] temp, int l, int r) { cD'|zH]
int i, j, k; [5-3PuT&9
int mid = (l + r) / 2; $T7(AohR
if (l == r) mvu$
return; y4%[^g~-
if ((mid - l) >= THRESHOLD) ,56objaE
mergeSort(data, temp, l, mid); M7.H;.?
else ~j yl
insertSort(data, l, mid - l + 1); \hDjZ
if ((r - mid) > THRESHOLD) xM_+vN*(
mergeSort(data, temp, mid + 1, r); Yan,Bt{YJ
else vw*,_f
insertSort(data, mid + 1, r - mid); -r%k)4_
h3Y|0-D
for (i = l; i <= mid; i++) { {ewo-dva
temp = data; \t ^9UN
} jJ3dZ<#
for (j = 1; j <= r - mid; j++) { ' 1D1y'
temp[r - j + 1] = data[j + mid]; 7e=s`j
} rLE5fl5W
int a = temp[l]; fjLS_Q ;h
int b = temp[r]; C/ENJ&
for (i = l, j = r, k = l; k <= r; k++) { $q g/8G
if (a < b) { %b>Ee>rdD
data[k] = temp[i++]; ]SL0Mn g8
a = temp; ys9'1+9
} else { n{=Nf|=
data[k] = temp[j--]; >{eGSSG0
b = temp[j]; "qhQJql
} 78kT}kgW
} >dfk2.6e
} #;hYJ Y
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/** [&+5E1%L
* @param data _)MbvF
* @param l vt(cC))
* @param i EttQ<z_T
*/ ;mwU>l,4
private void insertSort(int[] data, int start, int len) { -J^t#R^$`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (3N;-
} LfX[(FP
} >#|%y>g .o
} PvW~EJ
} cm`x;[e6l
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堆排序： &6^QFqqW`-
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package org.rut.util.algorithm.support; %Wa. 2s
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import org.rut.util.algorithm.SortUtil; XX'mM v
`J-&Y2_/k
/** \s_`ZEB
* @author treeroot G$E+qk nJL
* @since 2006-2-2 }5=tUfh)]'
* @version 1.0 li&&[=6A
*/ )BmO[AiOM
public class HeapSort implements SortUtil.Sort{ p* tAwl
3?s1Yw>?
/* (non-Javadoc) WoWmmZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &5Huv?^a'
*/ t{Z:N']H
public void sort(int[] data) { F1NYpCR
MaxHeap h=new MaxHeap(); O_^;wey0}?
h.init(data); frUO+
for(int i=0;i h.remove(); nE=,=K~
System.arraycopy(h.queue,1,data,0,data.length); A;gU@8m
} Mcqym8,q|3
:NXM.@jJ="
private static class MaxHeap{ ,_I#+XiXY
i7foZ\btFc
void init(int[] data){ 2Z7r ZjXW
this.queue=new int[data.length+1]; T*qSk!
for(int i=0;i queue[++size]=data; BL H~`N3U
fixUp(size); wD5fm5r=
} |WsB0R
} tQIa6c4|
h.)o4(bO
private int size=0; W5R /
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private int[] queue; rfYFS96
a G\
public int get() { 2)(ynrCe
return queue[1]; Y *n[*N
} +K7oyZg
52q<|MW%
public void remove() { D0LoT?$N
SortUtil.swap(queue,1,size--); tlcNGPa
fixDown(1); 5'S~PQka*
} {!NXu
file://fixdown [6f(3|"
private void fixDown(int k) { .a7!*I#g
int j; j S<."a/n
while ((j = k << 1) <= size) { WbGN 5?9Q
if (j < size %26amp;%26amp; queue[j] j++; @q+X:K5b
if (queue[k]>queue[j]) file://不用交换 1[40\sM
break; h4tAaPcS+
SortUtil.swap(queue,j,k); LuvRxmQ`
k = j; ';3#t(J;
} !b8.XGo
} /eY}0q%
private void fixUp(int k) { :bu]gj4e
while (k > 1) { ><H*T{ Pg
int j = k >> 1; UflS`
if (queue[j]>queue[k]) 1XJLGMW,
break; Wph@LRB]
SortUtil.swap(queue,j,k); mH/9J
k = j; Z&Xp9"j,@;
} KYR64[1
} ##BfI`FJ
Z Z9D6+R
} 9;R'Xo=y
`}S;_g!
} H,0Io
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SortUtil： 1s6L]&B
XxLauJP K
package org.rut.util.algorithm; uO5y{O2W
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import org.rut.util.algorithm.support.BubbleSort; kn&>4/')
import org.rut.util.algorithm.support.HeapSort; T1i}D"H %
import org.rut.util.algorithm.support.ImprovedMergeSort; oyq9XW~ D
import org.rut.util.algorithm.support.ImprovedQuickSort; I8Q!`KJ
import org.rut.util.algorithm.support.InsertSort; oe,yCdPs
import org.rut.util.algorithm.support.MergeSort; Xhp={p;
import org.rut.util.algorithm.support.QuickSort; ^~7ouA
import org.rut.util.algorithm.support.SelectionSort; lky5%H
import org.rut.util.algorithm.support.ShellSort; ]4eIhj?
Eh&-b6:
/** T':} p2}w+
* @author treeroot PIM4c
* @since 2006-2-2 % 9} ?*U
* @version 1.0 AI#.G7'O
*/ }fh<LCwTi
public class SortUtil { q6EZ?bo{
public final static int INSERT = 1; FgnPh%[u
public final static int BUBBLE = 2; "-R19SpJKh
public final static int SELECTION = 3; GGez!?E%
public final static int SHELL = 4; @@d6,=
public final static int QUICK = 5; &*#Obv
public final static int IMPROVED_QUICK = 6; bDjm:G
public final static int MERGE = 7; 1h#e-Oyff
public final static int IMPROVED_MERGE = 8; L)X[$:
public final static int HEAP = 9; 7~!F3WT{
v/x~L$[
public static void sort(int[] data) { <g1=jG:7k
sort(data, IMPROVED_QUICK); OQiyAyX
} DdCNCXU
private static String[] name={ )Y:C'*.r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .qS(-7<
}; 8 DPn5E#M1
qyL!>kZr@
private static Sort[] impl=new Sort[]{ 1C+d&U
new InsertSort(), Z7dyPR
new BubbleSort(), U# U*^#
new SelectionSort(), OCEhwB0
new ShellSort(), U?=-V8#M|
new QuickSort(), JS^!XB'!
new ImprovedQuickSort(), 3GPGwzX |
new MergeSort(), k\Z7Dg$\D
new ImprovedMergeSort(), 8c%_R23
new HeapSort() nd~O*-uYg
}; S#*aB2ZS
M`p[ Zq
public static String toString(int algorithm){ w\y)
return name[algorithm-1]; "Pa y2
} b=XXp`h~a
r<5i
public static void sort(int[] data, int algorithm) { Y|cj&<o
impl[algorithm-1].sort(data); Mb=j'H<N@
} 47!k!cHa
uU/'oZ?
public static interface Sort { Ogu";p(
public void sort(int[] data); %r]V:d+
} W~j>&PK,?
pvhN.z
public static void swap(int[] data, int i, int j) { 2?@Ozr2Uh
int temp = data; Xx1eSX
data = data[j]; _K3;$2d|R
data[j] = temp; GTke<R
} #=,c8"O
} 5Kl;(0B9