[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; >k*QkIyq
} |^C?~g
int i1=l; M:6H%6eT
int i2=mid+1; "w=p@/C
for(int cur=l;cur<=r;cur++){ >pO[S[
if(i1==mid+1) j\q1b:pE
data[cur]=temp[i2++]; _a8^AG
else if(i2>r) EK_NN<So#
data[cur]=temp[i1++]; TgJx%
else if(temp[i1] data[cur]=temp[i1++]; 1%^U=[#2`
else o DPs xw
data[cur]=temp[i2++]; X&MO}
} Lg|j0-"N
} `x~k}
p*_g0_^
} HGfYL')Z
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改进后的归并排序: z 4Qz9#*"^
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package org.rut.util.algorithm.support; Df||#u=n
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import org.rut.util.algorithm.SortUtil; qc|;qPj
`5<
/** UY*Hc
* @author treeroot y7wy9+>l
* @since 2006-2-2 i|Lir{vW
* @version 1.0 rl'YyO}2
*/ :IV4]`
public class ImprovedMergeSort implements SortUtil.Sort { e%`gD*8
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private static final int THRESHOLD = 10; KArf:d
yx3M0Qo
/* )J<Li!3
* (non-Javadoc) "'94E,W
* aWm0*W"(@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .^I,C!O#
*/ u]@``Zb|
public void sort(int[] data) { JMuUj_^}7
int[] temp=new int[data.length]; /XEcA5C<
mergeSort(data,temp,0,data.length-1); eg~$WB;1
} vlw2dY@^
Ooc,R(
private void mergeSort(int[] data, int[] temp, int l, int r) { Zla5$GM
int i, j, k; i cQsA
int mid = (l + r) / 2; p+snBaAo}
if (l == r) J;+tQ8,AP
return; =R:3J"ly0
if ((mid - l) >= THRESHOLD) '1~mnmiP
mergeSort(data, temp, l, mid); P-K\)65{Y
else !O@qqg(>
insertSort(data, l, mid - l + 1); yrR<F5xge
if ((r - mid) > THRESHOLD) RQy|W}d_
mergeSort(data, temp, mid + 1, r); ?CAP8_
else SLSJn))@!
insertSort(data, mid + 1, r - mid); #E5Sc\,
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for (i = l; i <= mid; i++) { ;Y?7|G97*S
temp = data; {(o\G"\<XY
} R)WvU4+U
for (j = 1; j <= r - mid; j++) { Dgj`_yd
temp[r - j + 1] = data[j + mid]; }%| (G[
} yb*SD!
int a = temp[l]; 7 '2E-#^
int b = temp[r]; 0h^upB#p
for (i = l, j = r, k = l; k <= r; k++) { w?Nvm?_]
if (a < b) { qXt2m
data[k] = temp[i++]; cm%QV?
a = temp; Q {3"&
} else { @'?<92A
data[k] = temp[j--]; +NxEx/{
b = temp[j]; ?%{bMqYJD{
} igOjlg_Q
} L=Dd`
} 5Jp@n .
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/** .oO_x>
* @param data =9i:R!,W
* @param l x/~V ZO
* @param i 1oFU4+{ 4
*/ #PVgx9T=_
private void insertSort(int[] data, int start, int len) { IJD'0/R'c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Axk p
} nrUrMnlg
} 9^4^EY#
} Sl:Qq!
} N1\u~%AT"
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堆排序： d5T0#ue/e
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package org.rut.util.algorithm.support; @8DBLn w
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import org.rut.util.algorithm.SortUtil; #h/-
Rr^<Q:#"<|
/** r}WV"/]p
* @author treeroot 8niQG']
* @since 2006-2-2 }z,4IHNn
* @version 1.0 B:n9*<v(
*/ Wgq*|teW
public class HeapSort implements SortUtil.Sort{ "}\z7^.W>
-[~{c]/c
/* (non-Javadoc) pA!+;Y!ZB<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |5F]y"Nb
*/ []1VD#
public void sort(int[] data) { RA+Y./*h
MaxHeap h=new MaxHeap(); /]>&OSV
h.init(data); hnvn&{|
for(int i=0;i h.remove(); ]QtdT8~
System.arraycopy(h.queue,1,data,0,data.length); 5[al^'y
} x|U]x
ti`z:8n7
private static class MaxHeap{ m589C+7
/!eC;qp;[
void init(int[] data){ {3$ge
this.queue=new int[data.length+1]; C&NoEtL>s
for(int i=0;i queue[++size]=data; 59$mfW o>
fixUp(size); R{8nR00|1
} 3`n5[RV
} 3+{hO@O
}Da8S|)H
private int size=0; 9gn_\!Mp
CYEqH2"3
private int[] queue; UQPd@IVu6
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public int get() { $$A{|4,aI
return queue[1]; rP2^D[uM.
} MGX,JW>L
(+@3Dr5o0}
public void remove() { UrH^T;#
SortUtil.swap(queue,1,size--); *B)>5r
fixDown(1); &%fy
} g5V9fnb!d
file://fixdown ;g^QHr
private void fixDown(int k) { ?.v!RdM+
int j; S%Pk@n`z]
while ((j = k << 1) <= size) { 6%U1%;
if (j < size %26amp;%26amp; queue[j] j++; Gw~^6(Qu
if (queue[k]>queue[j]) file://不用交换 J^ P/2a#a
break; cP$b>3O
SortUtil.swap(queue,j,k); >`5iq.v
k = j; n2Dnpe:
} =XQ3sk6U
} 8$v17 3
private void fixUp(int k) { F!|Z_6\tv:
while (k > 1) { AjAmV hq
int j = k >> 1; zST#X}
if (queue[j]>queue[k]) &ad9VB7
break; me1ac\
SortUtil.swap(queue,j,k); p % 3B^
k = j; %ghQ#dZ]&
} ^5 F-7R8Q
} <H}"xp)j0
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} #n{wK+lz
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} 7Q0M3m
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SortUtil： .Z8 x!!Q*
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package org.rut.util.algorithm; un W{ZfEC
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import org.rut.util.algorithm.support.BubbleSort; @]H&(bw
import org.rut.util.algorithm.support.HeapSort; a}M7"v9
import org.rut.util.algorithm.support.ImprovedMergeSort; bk2HAG
import org.rut.util.algorithm.support.ImprovedQuickSort; GQ2&D}zh
import org.rut.util.algorithm.support.InsertSort; Ea!}r|~]0
import org.rut.util.algorithm.support.MergeSort; #8;^ys1f
import org.rut.util.algorithm.support.QuickSort; tI*u"%#t
import org.rut.util.algorithm.support.SelectionSort; >|6[uKrO
import org.rut.util.algorithm.support.ShellSort; +]I;C
ujmW {()
/** ^zsCF0
* @author treeroot `r_qvrC
* @since 2006-2-2 wh|[ "U('
* @version 1.0 C0i:*1
*/ S &s7]
public class SortUtil { lH:TE=|4
public final static int INSERT = 1; Z:O24{ro5
public final static int BUBBLE = 2; BB--UM{7
public final static int SELECTION = 3; %lv2;-
public final static int SHELL = 4; 6}C4 SZ
public final static int QUICK = 5; U+@yx>!
public final static int IMPROVED_QUICK = 6; 8Dhq_R'r
public final static int MERGE = 7; eJ'2CM6
public final static int IMPROVED_MERGE = 8; Jc`LUJT
public final static int HEAP = 9; Ip.5I!h[Xb
7Ar4:iNvX
public static void sort(int[] data) { *: e^yi
sort(data, IMPROVED_QUICK); |oSyyDYWP
} eK/[jxNO
private static String[] name={ U QXT&w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .X_k[l9
}; .g(yTA
bxkp9o
private static Sort[] impl=new Sort[]{ FxM`$n~K
new InsertSort(), HY5g>wv@
new BubbleSort(), (}4tj4d
new SelectionSort(), \dIIZSN
new ShellSort(), @,M!&l
new QuickSort(), P8DJv-f`
new ImprovedQuickSort(), {* >$aI
new MergeSort(), ^5=}Y>EJO
new ImprovedMergeSort(), 0J@)?,V-.
new HeapSort() k W/3 Aq7r
}; ORcl=Eo>
tq<7BO<6
public static String toString(int algorithm){ W>wE8? _,
return name[algorithm-1]; ?h1]s&^|2
} hP3I_I[qF}
5{,/m"-
public static void sort(int[] data, int algorithm) { UgSSZ05Lq
impl[algorithm-1].sort(data); W qci51y>#
} )P:TVe9`
u6t.$a!5
public static interface Sort { pL-p
public void sort(int[] data); xzW]D0o0
} B wtD!de$
COJqVC(#
public static void swap(int[] data, int i, int j) { -HZvz[u
int temp = data; O:xRUjpL
data = data[j]; HxU.kcf
data[j] = temp; sb4r\[?
} !rTh+F*
} $Jb+}mlT