[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; =j w?*
} d+h~4'ebv
int i1=l; +`S_Gy
int i2=mid+1; GRj [2I7:
for(int cur=l;cur<=r;cur++){ ]n1#8T&<*z
if(i1==mid+1) 3&[d.,/
data[cur]=temp[i2++]; _W Hi<,-
else if(i2>r) ;O>zA]Z8r
data[cur]=temp[i1++]; V@z/%=PJ
else if(temp[i1] data[cur]=temp[i1++]; 9. FXbNYg
else eGKvzu
data[cur]=temp[i2++]; kG4])qxC'
} j/wQ2"@a
} \ D>!&
x^`P[>
} LCIe1P2
USgO`l\}4
改进后的归并排序: p+nB@fN/
B;iJ$gt]
package org.rut.util.algorithm.support; l:~ >P[
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import org.rut.util.algorithm.SortUtil; jv29,46K
bB/fU7<{)u
/** 66WJ=?JV
* @author treeroot BUL<FTg
* @since 2006-2-2 Cvt/ot-J?
* @version 1.0 F`gK6;zp
*/ A]'XC"lS
public class ImprovedMergeSort implements SortUtil.Sort { .db:mSrL
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private static final int THRESHOLD = 10; ^8ilUu
#8vl2qWbi
/* -idbR[1{?
* (non-Javadoc) #="Lr4T
* >Wd=+$!I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *g'%5i1ed
*/ oO &%&;[/A
public void sort(int[] data) { %t.\J:WN;
int[] temp=new int[data.length]; N-<,wUxf
mergeSort(data,temp,0,data.length-1); ?6\A$?
} 9,>c;7s X
QUXr#!rPY|
private void mergeSort(int[] data, int[] temp, int l, int r) { XGnC8Be{4
int i, j, k; R6GlQ G
int mid = (l + r) / 2; hR[_1vuIu
if (l == r) ey>tUmt6?
return; >"]t4]GVf
if ((mid - l) >= THRESHOLD) cE,,9M@^
mergeSort(data, temp, l, mid); 1X&scVw
else "Q.C1#W}.
insertSort(data, l, mid - l + 1); xJ\sm8
if ((r - mid) > THRESHOLD) CF_2ez1u0y
mergeSort(data, temp, mid + 1, r); bM W}.v!
else *$t=Lh
insertSort(data, mid + 1, r - mid); 7W/55ZTmJ
1OK~*=/4
for (i = l; i <= mid; i++) { y>J6)F =
temp = data; !r*JGv=
} .,p@ee$q
for (j = 1; j <= r - mid; j++) { 'A/{7*,
temp[r - j + 1] = data[j + mid]; Co<F<eXe
} B]#iZ,Tp
int a = temp[l]; #@M'*X_%}K
int b = temp[r]; 51s3hX$
for (i = l, j = r, k = l; k <= r; k++) { dlV HyCW
if (a < b) { TPKm>5g
data[k] = temp[i++]; _(@ezX.p
a = temp; b]Lp_t
} else { :7qJ[k{g
data[k] = temp[j--]; >hotkMX `3
b = temp[j]; }"^d<dvuz
} ~X) 1!Sr
} K;g6V!U
} w^ 8^0i-
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/** gEq";B%?
* @param data Xr|e%]!**
* @param l h4>q~&Pd
* @param i Y-"7R>^I
*/ q+67Wc=
private void insertSort(int[] data, int start, int len) { g.Kyfs4`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .uo:fxbd2
} 9aKCO4
} _ba.oIc
} 4':U rJ+
} EhIa31>X
Ymcc|u6$"
堆排序： .Dyxul
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package org.rut.util.algorithm.support; Zdu8axK:
`hl1R3nBM
import org.rut.util.algorithm.SortUtil; Wl>$<D4mO[
9>L{K
/** KSl@V>!_
* @author treeroot \v.YP19
* @since 2006-2-2 .t%`"C
* @version 1.0 ^ G>/;mZ
*/ =/^{Pn
public class HeapSort implements SortUtil.Sort{ EK^["_*A
u6p nO
/* (non-Javadoc) V34]5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EDGAaN*Q
*/ p~t5PU*(
public void sort(int[] data) { +JBYGYN&K
MaxHeap h=new MaxHeap(); b@N*W]
h.init(data); bdyE9t
for(int i=0;i h.remove(); HNL;s5gq
System.arraycopy(h.queue,1,data,0,data.length); P/~kX_
} mr#XN&e
zJtB?<
private static class MaxHeap{ ~VO?PfxZ
:eTzjW=
void init(int[] data){ 'ul~f$ V
this.queue=new int[data.length+1]; 7`t[|o
for(int i=0;i queue[++size]=data; k3B]u.Lo
fixUp(size); PqwoZo0j
} %-, -:e
} =M/($PA
8` f=Eh
private int size=0; P'CDV3+
.Vb\f
private int[] queue; ! ^U!T\qDi
`n`aA)|<
public int get() { ef(OhIX
return queue[1]; @D&}ZV=J
} ePwoza
08 aZU
public void remove() { wWUt44:0O
SortUtil.swap(queue,1,size--); ;Quk%6;[N
fixDown(1); y@Ga9bI7
} YumHECej
file://fixdown hj-#pL-t
private void fixDown(int k) { 3SWO_
int j; [n;GP@A]R
while ((j = k << 1) <= size) { /N(Ol WEp
if (j < size %26amp;%26amp; queue[j] j++; .UJjB}4$f
if (queue[k]>queue[j]) file://不用交换 Wfyap)y
break; M8' GbF=1
SortUtil.swap(queue,j,k); sAU!u
k = j; 0hx EI
} niP/i
} Sg}]5Mn`
private void fixUp(int k) { aJ}Cqk
while (k > 1) { h;8^vB y
int j = k >> 1; )o@-h85";
if (queue[j]>queue[k]) :%vD hMHa
break; ZAcW@xfb
SortUtil.swap(queue,j,k); By-A1|4Cp`
k = j; !9JK95;
} Oe*+pReSD
} 2OJ=Xb1
_;].
} ^qlfdf
|LNAd:0
} j?rq%rQd
~%o?J"y
SortUtil： $Sfx0?'
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package org.rut.util.algorithm; h q&2o
?sBbe@OC?
import org.rut.util.algorithm.support.BubbleSort; #4<Rs|K
import org.rut.util.algorithm.support.HeapSort; *w;=o}`
import org.rut.util.algorithm.support.ImprovedMergeSort; 89{@2TXR
import org.rut.util.algorithm.support.ImprovedQuickSort; _~b$6Nf!83
import org.rut.util.algorithm.support.InsertSort; ,| EaW& 2
import org.rut.util.algorithm.support.MergeSort; =W~K_jE5lo
import org.rut.util.algorithm.support.QuickSort; w %sHA
import org.rut.util.algorithm.support.SelectionSort; tag~SG`ov
import org.rut.util.algorithm.support.ShellSort; }TS4D={1
+WP
/** m!-,K8
* @author treeroot D.\s mk
* @since 2006-2-2 :{Crc
* @version 1.0 J3B]JttU
*/ ;0f?-W?1
public class SortUtil { 'YcoF;&[C
public final static int INSERT = 1; gqf*;Z eU
public final static int BUBBLE = 2; T]tG,W1>i
public final static int SELECTION = 3; [:!D.@h|
public final static int SHELL = 4; g^EkRBU
public final static int QUICK = 5; ^KK6 d
public final static int IMPROVED_QUICK = 6; a:(.{z?nM
public final static int MERGE = 7; s1eGItx[w
public final static int IMPROVED_MERGE = 8; g :me:M
public final static int HEAP = 9; m pWmExQ
K8UgP?c;0
public static void sort(int[] data) { elBmF#,j7
sort(data, IMPROVED_QUICK); _g(4-\
} &_EjP hZ
private static String[] name={ T]%:+_,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" phA^ kdW
}; $m;rOKVU
KF[P /cFI
private static Sort[] impl=new Sort[]{ MH>CCT
new InsertSort(), /J"U`/ {4
new BubbleSort(), [z1[4
new SelectionSort(), T53|*~u
new ShellSort(), .D`""up|{
new QuickSort(), G3&l|@5
new ImprovedQuickSort(), P'4jz&4
new MergeSort(), mqg[2VTRP
new ImprovedMergeSort(), [o=v"s't)
new HeapSort() ^sNj[%I R
}; \666{.a
j<LDJi>O
public static String toString(int algorithm){ |\OG9{q
return name[algorithm-1]; OBY
} Q( C\X
prC1<rm
public static void sort(int[] data, int algorithm) { }!-K)j.
impl[algorithm-1].sort(data); C>vp oCA
} :Sx!jx>W
)PU?`yLTr
public static interface Sort { #UcqKq
public void sort(int[] data); K0i[D"
} D4x~Vk%H
x*A_1_A
public static void swap(int[] data, int i, int j) { Ifm|_
int temp = data; 8tM40/U$
data = data[j]; 0!c^pOq6
data[j] = temp; qe!\ oh
} S'jH
} u*ZRU 4U