[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; rpT{0>5
} 9v<Sng
int i1=l; Rl"" aZ
int i2=mid+1; 21BlLz
for(int cur=l;cur<=r;cur++){ 5CsJghTw
if(i1==mid+1) IlcFW
data[cur]=temp[i2++]; k98}Jx7J)"
else if(i2>r) VoJelyzh
data[cur]=temp[i1++]; P2Ja*!K]
else if(temp[i1] data[cur]=temp[i1++]; 1=t\|Th-
else ,JcQp=g
data[cur]=temp[i2++]; I!;#Nk>
} e1RtoNF^
} o2ndnIL
-R;.Md_
} O$%C(n(
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改进后的归并排序: .#;;pu7W
Tdr^~dcQ
package org.rut.util.algorithm.support; RkJ\?
u= K?K
import org.rut.util.algorithm.SortUtil; ;6} *0V_!k
M,Px.@tw.
/** 8P3EQY-
* @author treeroot 9 0[gXj
* @since 2006-2-2 1b'1vp
* @version 1.0 {=,?]Z+
*/ XRI1/2YA
public class ImprovedMergeSort implements SortUtil.Sort { 0=8.8LnN(
&:-`3J-
private static final int THRESHOLD = 10; )(&g\
gTR:9E:B
/* |Js96>B:
* (non-Javadoc) Y1 i!
* ,FJ9C3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~`MGXd"o
*/ 0rT-8iJp4P
public void sort(int[] data) { w<awCp
int[] temp=new int[data.length]; cmu5KeH
mergeSort(data,temp,0,data.length-1); %&^F.JTt\
} t9PS5O ;
~"5WQK`@
private void mergeSort(int[] data, int[] temp, int l, int r) { S&V5zB""n
int i, j, k; CD^_>sya
int mid = (l + r) / 2; ^n<p#0)+a
if (l == r) QH4nb h4
return; 7fl'nCo\"
if ((mid - l) >= THRESHOLD) mB#`{|1[
mergeSort(data, temp, l, mid); u:N/aaU=
else xGqe )M>8?
insertSort(data, l, mid - l + 1); /+J?Ep(_
if ((r - mid) > THRESHOLD) P!m~tu}B
mergeSort(data, temp, mid + 1, r); y6;'?.Y1
else 7BF't!-2F
insertSort(data, mid + 1, r - mid); )j@k[}R#g
gzP(LfI5
for (i = l; i <= mid; i++) { gW6lMyiLb
temp = data; qrNW\ME
} T{|'<KT
for (j = 1; j <= r - mid; j++) { T_,LK7D
temp[r - j + 1] = data[j + mid]; mxQS9y
} ix]3t^
int a = temp[l]; X<(h)&E
int b = temp[r]; ZH`6>:
for (i = l, j = r, k = l; k <= r; k++) { dp2".
if (a < b) { t_,iV9NrZ
data[k] = temp[i++]; _>A])B ^
a = temp; f<WnPoV
} else { F)_Rs5V:(
data[k] = temp[j--]; PKfxL}:"8
b = temp[j]; pLBp[GQ
} xvjHGgWSxc
} %o#D"
} !V@Y \M d
Gr?"okaA
/** klUxt?-
* @param data ozkN&0
* @param l 9|Jmj @9
* @param i 9T|7edl
*/ F^T7u?^)
private void insertSort(int[] data, int start, int len) { n1uJQt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >}u?{_s *0
} Zu\#;O
} tmK@Veb*a'
} 7x-k-F3
} yKOf]m>#
qJ"dkT*
堆排序： *-_` xe
{ j&|Em]
package org.rut.util.algorithm.support; #B`"B
+#1WOQfAD
import org.rut.util.algorithm.SortUtil; N.xmHvPk
I^M3>}p
/** 0gO2^m)W
* @author treeroot N##3k-0Ao
* @since 2006-2-2 yW|yZ(7
* @version 1.0 pVt-7AgW
*/ )5d&K8@
public class HeapSort implements SortUtil.Sort{ ;n7k_K#0z!
Q`AJR$L
/* (non-Javadoc) 8dIgw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A>7'W\R
*/ #5G!lbH
public void sort(int[] data) { ,UWO+B]
MaxHeap h=new MaxHeap(); uA:;OM}
h.init(data); LL9Mty,
for(int i=0;i h.remove(); Ez<J+#)t
System.arraycopy(h.queue,1,data,0,data.length); =kZPd>&L
} U G^6I5
b0LQ$XM>8
private static class MaxHeap{ OYG8%L
Ha)w*1&w"
void init(int[] data){ S:rW}rJ
this.queue=new int[data.length+1]; kc~Z1
for(int i=0;i queue[++size]=data; `U(A 5
fixUp(size); ttZ!P:H2
} `j4ukOnG
} <po(7XB
YaSwn3i/@S
private int size=0; |4X:>Ut]
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private int[] queue; rCYNdfdpp
$vGlZ<3g
public int get() { KMoRMCT
return queue[1]; *|euC"5c
} t4h05i
7:M%w'oR
public void remove() { d<7xSRC
SortUtil.swap(queue,1,size--); rU.ew~
fixDown(1); Z?"Pkc.Ei
} tBrd+}e2*
file://fixdown jn)~@~c
private void fixDown(int k) { bB)EJCPq>
int j; n2(~r 'r)
while ((j = k << 1) <= size) { ]7dm`XV
if (j < size %26amp;%26amp; queue[j] j++; ^U~YG=!ww
if (queue[k]>queue[j]) file://不用交换 2{+\\.4Evk
break; <-}6X
SortUtil.swap(queue,j,k); ut-UTW
k = j; y3;G<9K2c]
} 4^AE;= Q
} Q CfA3*
private void fixUp(int k) { TO( =4;U
while (k > 1) { >-y'N.l^
int j = k >> 1; 7|,5;
if (queue[j]>queue[k]) <FGNV+?%e
break; E@t~juF!
SortUtil.swap(queue,j,k); A`X$jpAn&
k = j; T!v%NZj3
} ?"qU.}kGL
} H~||]_q|
5G\vV]RR&
} m:p1O3[R
d['BtVJ
} 8@b@y|#]X
eW7;yH
SortUtil： ^P&y9dC.
=C<_rBY
package org.rut.util.algorithm; 93o}vy->
:j?Lil%R
import org.rut.util.algorithm.support.BubbleSort; =P0~=UP
import org.rut.util.algorithm.support.HeapSort; 5^0W\
import org.rut.util.algorithm.support.ImprovedMergeSort; G.T}^xHmL
import org.rut.util.algorithm.support.ImprovedQuickSort; Q3z-v&^E9
import org.rut.util.algorithm.support.InsertSort; T-|z18|!
import org.rut.util.algorithm.support.MergeSort; q\mVZyj
import org.rut.util.algorithm.support.QuickSort; BS+N
import org.rut.util.algorithm.support.SelectionSort; oEKLuy
import org.rut.util.algorithm.support.ShellSort; ?N$
/o8h1L=
/** ]_F%{8|
* @author treeroot Xv=n+uo
* @since 2006-2-2 <A"}Krq?
* @version 1.0 WI}P(!h\J
*/ ;uDH&3W
public class SortUtil { Et`z7Q*e
public final static int INSERT = 1; =AZ>2P
public final static int BUBBLE = 2; f4`=yj*
public final static int SELECTION = 3; }1d 6d3b
public final static int SHELL = 4; P) GBuW
public final static int QUICK = 5; _j<46^
public final static int IMPROVED_QUICK = 6; t[iE >
public final static int MERGE = 7; z#bOFVg#
public final static int IMPROVED_MERGE = 8; >KM<P[BRd
public final static int HEAP = 9; F!'b_gmz
Ngh9+b6[
public static void sort(int[] data) { HtmJIH:
sort(data, IMPROVED_QUICK); -br/
} !*+~R2&b
private static String[] name={ k gWF@"_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r-&4<=C/N
}; LuR.;TiW
5XA6IL|/l
private static Sort[] impl=new Sort[]{ y=5s~7]
new InsertSort(), &``;1/J*W
new BubbleSort(), s{`r$:!
new SelectionSort(), S-'iOJ1]
new ShellSort(), q=UKL`;C}U
new QuickSort(), ~A [ Ju%R
new ImprovedQuickSort(), gWgYZX
new MergeSort(), xr)kHJ:v
new ImprovedMergeSort(), im4V6 f;%
new HeapSort() }T4"#'`
}; dl(cYP8L
WR gAc%
public static String toString(int algorithm){ 2/qfK+a
return name[algorithm-1]; $*L@ym
} ak0KrVF
r?[PIf
public static void sort(int[] data, int algorithm) { C03ehjT<
impl[algorithm-1].sort(data); )uZ<?bkQ
} "2N3L8?k
"7Zb)Ocb
public static interface Sort { GkaIqBS
public void sort(int[] data); 6hAeLlU1
} 8O("o7~"
Wi hQj
public static void swap(int[] data, int i, int j) { iV(B0z
int temp = data; P0k|33;7L
data = data[j]; l J;wl|9
data[j] = temp; o^d(mJZ.F~
} F+*: >@3
} X.%Xi'H