[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; !%s&GD8&l
} VwxLElV
int i1=l; '2BE"e
int i2=mid+1; iF1E 5{dH
for(int cur=l;cur<=r;cur++){ :*MqYny&
if(i1==mid+1) ^wm>\o;
data[cur]=temp[i2++]; "o.g}Pv
else if(i2>r) R#0Z
data[cur]=temp[i1++]; ,Kw]V %xOb
else if(temp[i1] data[cur]=temp[i1++]; N! N>/9
else 6~_TXy/
data[cur]=temp[i2++]; P&0o~@`cL
} N akSIGm
} N 2\lBi
?rG>SA>o
} 7@*l2edXm+
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改进后的归并排序: =Pu;wx9
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package org.rut.util.algorithm.support; |q:p^;x
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import org.rut.util.algorithm.SortUtil; D#I^;Xg0h
CMI V"-
/** Xi~%,~
* @author treeroot [~[)C]-=
* @since 2006-2-2 /\0rRT
* @version 1.0 8UahoNrSt
*/ ^UEExjf
public class ImprovedMergeSort implements SortUtil.Sort { dvl'Sq<
g} /efE
private static final int THRESHOLD = 10; L~u@n24
)=vQrMyB
/* f*ICZM
* (non-Javadoc) )*wM DM5q
* c6@7>PM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &eqeQD6
*/ +nj 2
public void sort(int[] data) { ;`f14Fb
int[] temp=new int[data.length]; TOe=6Z5h
mergeSort(data,temp,0,data.length-1); bz1+AJG
} &# ?2zbZ
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private void mergeSort(int[] data, int[] temp, int l, int r) { 3iI 4yg
int i, j, k; Ac2,A>
int mid = (l + r) / 2; ,@#))2<RK
if (l == r) ruKm_j#J
return; (1pR=
if ((mid - l) >= THRESHOLD) ,_N+t:*#0
mergeSort(data, temp, l, mid); nN]GO}
else rEF0A&5
insertSort(data, l, mid - l + 1); ]"2;x
if ((r - mid) > THRESHOLD) s6k@WT?"^
mergeSort(data, temp, mid + 1, r); 5C|Y-G
else 5!b+^UR;z
insertSort(data, mid + 1, r - mid); djk?;^8
ye-EJDZN
for (i = l; i <= mid; i++) { p";5J+?(
temp = data; 4*D'zJsJ
} `+\6;nM
for (j = 1; j <= r - mid; j++) { ~v$1@DQ}
temp[r - j + 1] = data[j + mid]; c&mLK1A6
} wigs1
int a = temp[l]; g5OKhL0u
int b = temp[r]; 2&,jO+BqE@
for (i = l, j = r, k = l; k <= r; k++) { (\8~W*ej"
if (a < b) { ~\oF}7l$
data[k] = temp[i++]; wqnHaWd*
a = temp; d:X@zUR*)
} else { C$+z1z.!
data[k] = temp[j--]; Mjon++>Z
b = temp[j]; <3)k M&.B
} %A$5mi^
} +v.<Fw2k#
} vH?rln
li37*
/** mp:xR^5c
* @param data Img$D*BM
* @param l #>ob1b|
* @param i +L,V_z
*/ 4aGVIQ
private void insertSort(int[] data, int start, int len) { ;xl0J*r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); RD|DHio%
} _yRD*2 !;
} cFZcBiw
} qN"Q3mU^h*
} ^7SE2Zi
LG+2?+tE"
堆排序： 0g`$Dap
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package org.rut.util.algorithm.support; sxn{uRF
^?8/9o
import org.rut.util.algorithm.SortUtil; r,HIoeAKP
*N&~Uq^
/** sR4B/1'E
* @author treeroot 6Qk[TL)t
* @since 2006-2-2 ^m/7TwD
* @version 1.0 agkGUK/
*/ QnA~,z/.w
public class HeapSort implements SortUtil.Sort{ <Ej`zGhWz
x']Fe7nv
/* (non-Javadoc) z*UgRLKZD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pft-.1py
*/ +# 3e<+!F
public void sort(int[] data) { RcC5_@W
MaxHeap h=new MaxHeap(); @h9QfJ_f
h.init(data); L|L;<
for(int i=0;i h.remove(); s1]m^,
System.arraycopy(h.queue,1,data,0,data.length); PX*}.L *x
} v5\5:b{/
T#<Q[h=
private static class MaxHeap{ !nsx!M
wF9L<<&B
void init(int[] data){ jU-aa+
this.queue=new int[data.length+1]; edo+ o{^
for(int i=0;i queue[++size]=data; PthgxB^
fixUp(size); uBl&{$<
} guG&3{&\s
} =I aWf
-xG6J.S
private int size=0; &1Cs'
&f}w&k2yj
private int[] queue; U\u07^h[
T 5F)
public int get() { <F8e?xy
return queue[1]; o*Xfgc
} n.rn+nuwv
VEpcCK
public void remove() { T(qTipq0
SortUtil.swap(queue,1,size--); QWnGolN
fixDown(1); q|:wzdmNZ
} $H)QUFyC
file://fixdown *NG\3%}%|@
private void fixDown(int k) { 2e-`V5{)b
int j; v$D U q+
while ((j = k << 1) <= size) { ?%[~J
if (j < size %26amp;%26amp; queue[j] j++; }h=PW'M{
if (queue[k]>queue[j]) file://不用交换 *`rfD*
break; =7JSJ98
SortUtil.swap(queue,j,k); m^0vux
k = j; ] j8bv3
} -pIz-*
} haY]gmC
private void fixUp(int k) { Aj|->Y
while (k > 1) { |iI dm
int j = k >> 1; l -xc*lC
if (queue[j]>queue[k]) t,Ka] /I
break; "p*'HQ
SortUtil.swap(queue,j,k); @ ?M\[qeF@
k = j; 8}m J)9<7
} tsJR:~
} SAdE9L =d
,f2oO?L}
} jLVG=rOn
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} tc0;Ake-&
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SortUtil： W-l+%T!
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package org.rut.util.algorithm; ZX` \so,&,
uQKQC?w
import org.rut.util.algorithm.support.BubbleSort; 5, ,~k=
import org.rut.util.algorithm.support.HeapSort; mLqqo2u
import org.rut.util.algorithm.support.ImprovedMergeSort; P*A+k"DU1
import org.rut.util.algorithm.support.ImprovedQuickSort; Lo%vG{yTr
import org.rut.util.algorithm.support.InsertSort; U8Zb&6
import org.rut.util.algorithm.support.MergeSort; Vf&U`K
import org.rut.util.algorithm.support.QuickSort; Jgv Mx
import org.rut.util.algorithm.support.SelectionSort; ;ND$4$
import org.rut.util.algorithm.support.ShellSort; ~c35Y9-5
j*<J&/luYZ
/** *,4rYb7I w
* @author treeroot 7h}gIm7e"
* @since 2006-2-2 q* p
* @version 1.0 NgDhdOB
*/ B=TUZ)
public class SortUtil { M5ZH6X@5
public final static int INSERT = 1; q4[}b-fF
public final static int BUBBLE = 2; |${4sUR
public final static int SELECTION = 3; Uv(R^50>
public final static int SHELL = 4; S-S%IdL
public final static int QUICK = 5; e'.BTt58Y
public final static int IMPROVED_QUICK = 6; b^$`2m-?@f
public final static int MERGE = 7; %xlpOR4
public final static int IMPROVED_MERGE = 8; reN\|?0{
public final static int HEAP = 9; Gk*u^J(
K<e #y!
public static void sort(int[] data) { R%WY!I8C
sort(data, IMPROVED_QUICK); {Nl?
} o'#& =h$_
private static String[] name={ R.rch2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <R]m(
}; ojy^A
<?KPyg2
private static Sort[] impl=new Sort[]{ OJcS%-~
new InsertSort(), Ic2?1<IZA
new BubbleSort(), 1%+-}yo<
new SelectionSort(), ']1n?K=A
new ShellSort(), mH$tG $
new QuickSort(), ['IH*gi
new ImprovedQuickSort(), 1,wcf,
new MergeSort(), @ b!]Jw
new ImprovedMergeSort(), !q2zuxq!R
new HeapSort() \ASt&'E
}; OT 0c5x
L]kBY2c
public static String toString(int algorithm){ Z\nDR|3
return name[algorithm-1]; 9r?Z'~,Za
} VmqJMU>.
.g8*K "
public static void sort(int[] data, int algorithm) { 1B4Qj`:+0
impl[algorithm-1].sort(data); hTtn /j
} #d@wjQ0DW
FH=2,"A
public static interface Sort { Hh%!4_AMw
public void sort(int[] data); {XOl &
} \V>5)Rn
}p~2lOI
public static void swap(int[] data, int i, int j) { NIs7v
int temp = data; t8*Jdd^3Z/
data = data[j]; e(t}$Q=
data[j] = temp; }^&S^N7
} aD: #AmbJ
} RrMEDMhk6