[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; v5[gFY(?
} Vn#}f=u\
int i1=l; Ed=/w6<
int i2=mid+1; \K$\-]N+
for(int cur=l;cur<=r;cur++){ ;\pr05
if(i1==mid+1) 8m+~HSIR
data[cur]=temp[i2++]; gj^)T_E_
else if(i2>r) F_@B ` ,
data[cur]=temp[i1++]; e{x>u(
else if(temp[i1] data[cur]=temp[i1++]; nCYz];".
else =xk>yw!O)
data[cur]=temp[i2++]; FGVw=G{r
} G&oD;NY@/
} m` 1dB%;?
b7.7@Ly y
} o/-RGLzAo
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改进后的归并排序: Snkb^Kt
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package org.rut.util.algorithm.support; _7!ZnJrR
P'KA-4!
import org.rut.util.algorithm.SortUtil; 6ALjM-t=V
B- @bU@H
/** ag'hHFV
* @author treeroot AXbb-GK
* @since 2006-2-2 tddwnpnSw
* @version 1.0 Z_GGH2u
*/ ]xRR/S4
public class ImprovedMergeSort implements SortUtil.Sort { i!YfR]"}
_hY6NMw
private static final int THRESHOLD = 10; \GEz.Vb
:!Ci#[g
/* OU{c|O
* (non-Javadoc) Kw-<o!~
* Ta[2uv>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) It3k#A0
*/ YP,,vcut
public void sort(int[] data) { a;[\nCK
int[] temp=new int[data.length]; EjfQF C
mergeSort(data,temp,0,data.length-1); EV6R[2kl
} B EwaQvQ!
2/3yW.C
private void mergeSort(int[] data, int[] temp, int l, int r) { GvtK=A$b
int i, j, k; `,AOxJ:$
int mid = (l + r) / 2; tav@a)
if (l == r) 5WI bnV@
return; d>[i*u,]/
if ((mid - l) >= THRESHOLD) b36{vcs~
mergeSort(data, temp, l, mid); 2)IM<rf'^
else #?)6^uTW
insertSort(data, l, mid - l + 1); j \rGU){
if ((r - mid) > THRESHOLD) b_sasZo
mergeSort(data, temp, mid + 1, r); SY Bp-o
else t,YRM$P
insertSort(data, mid + 1, r - mid); 6aB]&WO1@
e6p3!)@P1
for (i = l; i <= mid; i++) { sqhMnDn[
temp = data; M"*NV(".g
} d'(n/9K
for (j = 1; j <= r - mid; j++) { WWSycH ?[
temp[r - j + 1] = data[j + mid]; tQ@7cjq8bA
} _#\Nw0{
int a = temp[l]; lL zR5445)
int b = temp[r]; < }K9 50
for (i = l, j = r, k = l; k <= r; k++) { ]sEuh~F
if (a < b) { ;BuMzG:tmZ
data[k] = temp[i++]; &en2t=a
a = temp; eFsl
} else { 8s22VL
data[k] = temp[j--]; )VQ[}iT
b = temp[j]; UXji$|ET6
} DOu^
} igL5nE=n
} zuNm!$
SE*;6&yL
/** cq>J]35
* @param data y)KIz
* @param l u.q3~~[=
* @param i }h`z2%5o
*/ %3dc_YPS
private void insertSort(int[] data, int start, int len) { $-/-%=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n ^9?(a4u
} ZC2aIJ
} z?13~e[D
} dWzf C@]
} }t#|+T2f
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堆排序： yl?LXc[)
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package org.rut.util.algorithm.support; > 3x^jh
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import org.rut.util.algorithm.SortUtil; d7BpmM
(}F@0WYT^O
/** SN)Czi#7
* @author treeroot GTOA>RB2
* @since 2006-2-2 mNC?kp
* @version 1.0 wmV=GV8 d
*/ MMk9rBf
public class HeapSort implements SortUtil.Sort{ 2Bi]t%<{
i-w<5pGnf
/* (non-Javadoc) @|;[ ;:h@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L+ew/I>:
*/ {8mJ<b>VA
public void sort(int[] data) { }WJXQ@
MaxHeap h=new MaxHeap(); T$mT;k
h.init(data); N@_y<7#C
for(int i=0;i h.remove(); &LI q?
System.arraycopy(h.queue,1,data,0,data.length); n<|8Onw
} gna!Q
q=e;P;u
private static class MaxHeap{ =P,mix|
q2|x$5
void init(int[] data){ t ^>07#z
this.queue=new int[data.length+1]; xuHP4$<h3
for(int i=0;i queue[++size]=data; >"UXY)
fixUp(size); -N/n|{+F
} DNj<:Pdd)
} $'}|/D
Q65M(x+oy
private int size=0; 7h(
)+v5H
private int[] queue; %@(+`CCA
_!|$i
public int get() { t{UWb~"
return queue[1]; |H=5Am
} n[y=DdiKGS
?lqqu#;8
public void remove() { Q,9KLi3
SortUtil.swap(queue,1,size--); T-n>+G{
fixDown(1); ~YNzSkz
} Tq*<J~-
file://fixdown JoB-&r}\V*
private void fixDown(int k) { | #a{1Z)
int j; 3v$n}.
while ((j = k << 1) <= size) { 9FC_B+7
if (j < size %26amp;%26amp; queue[j] j++; ?!F<xi:
if (queue[k]>queue[j]) file://不用交换 +?t& 7={~
break; zxs)o}8icO
SortUtil.swap(queue,j,k); `r&Ui%fk;0
k = j; ~eTp( XG
} x!85P\sm
} *kf%?T.
private void fixUp(int k) { wmK;0 )|H
while (k > 1) { zI"&g]TV5
int j = k >> 1; (j:[<U
if (queue[j]>queue[k]) P\[K)N/1
break; gzK/l:
SortUtil.swap(queue,j,k); Gn6\n'r0
k = j; .@r{Tq,%q8
} H[g i`{c
} EQ"_kJ>81Y
)2Q0NbDn
} 6_8yQ
N1E9w:T`
} i< imE#
>f9Q&c$R
SortUtil： Ac*)z#H
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package org.rut.util.algorithm; _;BNWH
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import org.rut.util.algorithm.support.BubbleSort; R/B/|x
import org.rut.util.algorithm.support.HeapSort; }#g &l*P
import org.rut.util.algorithm.support.ImprovedMergeSort; #mM9^LJ
import org.rut.util.algorithm.support.ImprovedQuickSort; ~yngH0S$[b
import org.rut.util.algorithm.support.InsertSort; x`p908S^
import org.rut.util.algorithm.support.MergeSort; -NzOX"V]3
import org.rut.util.algorithm.support.QuickSort; ^755LW
import org.rut.util.algorithm.support.SelectionSort; @VND}{j
import org.rut.util.algorithm.support.ShellSort; 1*#hIuoj'
mWoN\Rwj
/** &f A1kG%
* @author treeroot lZ"C~B}9:I
* @since 2006-2-2 '&|%^9O/"
* @version 1.0 &B+_#V=X@
*/ *c.w:DkfB
public class SortUtil { /gaC
public final static int INSERT = 1; o{2B^@+Vb
public final static int BUBBLE = 2; x `%x f
public final static int SELECTION = 3; /ml+b8@
public final static int SHELL = 4; K)Ya%%6[U#
public final static int QUICK = 5; 55y}t%5
public final static int IMPROVED_QUICK = 6; $Zi{1w
public final static int MERGE = 7; >Ir?)h
public final static int IMPROVED_MERGE = 8; (t"|XSF
public final static int HEAP = 9; Vw.4;Zy(
FAGi`X<L
public static void sort(int[] data) { &"1_n]JO
sort(data, IMPROVED_QUICK); ls "Z4v(L6
} sV%=z}n=
private static String[] name={ frQ=BV5%6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EN>a^B+!
}; 4dz Ym+vJm
(:+Wc^0
private static Sort[] impl=new Sort[]{ m*e8j[w#
new InsertSort(), qIy9{LF
new BubbleSort(), 925T#%y
new SelectionSort(), 5}]gL
new ShellSort(), `]&'yt
new QuickSort(), "|WKK}
new ImprovedQuickSort(), d.>O`.Mu)}
new MergeSort(), 8M['-
new ImprovedMergeSort(), !*wd d8
new HeapSort() +,ld;NM{
}; ye {y[$#3
d| {<SRAI
public static String toString(int algorithm){ }6__E;h#J
return name[algorithm-1]; 6il+hz2&lH
} #LYx;[D6
i&}LuF8
public static void sort(int[] data, int algorithm) { g1UQ6Oa
impl[algorithm-1].sort(data); ?a?] LIE8
} 0KZsWlD:L
s BuXwa
public static interface Sort { NUi&x+
public void sort(int[] data); .p~.S&)
} X-"0Zc
-zH-9N*c
public static void swap(int[] data, int i, int j) { TU| 0I
int temp = data; Pj^Ccd'>=
data = data[j]; >LU !Z
data[j] = temp; Nc(A5*
} +jGUp\h%9;
} Vx n-