[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; 6^]Y])
} BQol>VRu
int i1=l; t6u01r{~`
int i2=mid+1; }!-K)j.
for(int cur=l;cur<=r;cur++){ C>vp oCA
if(i1==mid+1) :Sx!jx>W
data[cur]=temp[i2++]; )PU?`yLTr
else if(i2>r) #UcqKq
data[cur]=temp[i1++]; K0i[D"
else if(temp[i1] data[cur]=temp[i1++]; D4x~Vk%H
else x*A_1_A
data[cur]=temp[i2++]; $~V,.RD
} 'ju{j`b
} 0!c^pOq6
>!vb;a!
} B!=JRfT
u*ZRU 4U
改进后的归并排序: *jps}uk<
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package org.rut.util.algorithm.support; etEm#3
{:VUu?5-t;
import org.rut.util.algorithm.SortUtil; S[bFS7[
j#TtY|Po
/** +K3SAGm
* @author treeroot /=zzym~<>
* @since 2006-2-2 S?bG U8R5
* @version 1.0 Zjz< Q-
*/ do2~LmeW
public class ImprovedMergeSort implements SortUtil.Sort { N|v3a>;*l
e>Vr#a4
private static final int THRESHOLD = 10; /N`l z>^~
TS9=A1J#
/* (Z YGfX
* (non-Javadoc) H}OOkzwrA
* 5Mfs)a4j.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cC_L4
*/ D2`tWRm0
public void sort(int[] data) { ic}M)S FD;
int[] temp=new int[data.length]; rRN7HL+b
mergeSort(data,temp,0,data.length-1); NM0[yh
} 8#gS{
L--
private void mergeSort(int[] data, int[] temp, int l, int r) { f&w8o5=|I
int i, j, k; \4RVJ[2
int mid = (l + r) / 2; qV%t[>
if (l == r) #OKzJ"g
return; nwk66o:|
if ((mid - l) >= THRESHOLD) >9o(84AxIH
mergeSort(data, temp, l, mid); :wJ=t/ho
else $td=h)S^`
insertSort(data, l, mid - l + 1); KWVEAHIn
if ((r - mid) > THRESHOLD) un4q,Ac~0
mergeSort(data, temp, mid + 1, r); %rpJZ t
else F)we^'X
insertSort(data, mid + 1, r - mid); 6t0!a@t
%-y%Q.;k?
for (i = l; i <= mid; i++) { %ec9`0^4S
temp = data; (o/HLmr@Y
} S~QL x
for (j = 1; j <= r - mid; j++) { =X(8[ e
temp[r - j + 1] = data[j + mid]; =v4;t'_^
} WKf->W
int a = temp[l]; K|-?1)Um
int b = temp[r]; pSQ)DqW
for (i = l, j = r, k = l; k <= r; k++) { y9?~^pTx
if (a < b) { ffuV158a&
data[k] = temp[i++]; PQ`p:=~>:i
a = temp; 7Vf2Qx1_
} else { "T/ vE
data[k] = temp[j--]; 289@O-
b = temp[j]; jXEuK:exQ
} Lw 7,[?,Z
} &u62@ug#}
} y$VYWcFE
+~O0e-d
/** m>C}T
* @param data 8SvPDGu`]
* @param l _zG9.?'b3
* @param i $MF U9<O
*/ =9UR~-`d\
private void insertSort(int[] data, int start, int len) { cTO\Vhg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8Wn;U!qT
} wN[mU
} ;2||g8'
} -c-#1_X5
} C WJGr:}&
{Mc^[}9
堆排序： :` >|N|i
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package org.rut.util.algorithm.support; s)#8>s-
{{b&l!
import org.rut.util.algorithm.SortUtil; RbUhLcG5
0n25{N
/** 0f.rjd
* @author treeroot d\Xi1&&
* @since 2006-2-2 rlEp&"+|M
* @version 1.0 " gB.
*/ ?@U7tNI
public class HeapSort implements SortUtil.Sort{ ].f28bY
G3{t{XkV
/* (non-Javadoc) TqbDj|7`R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \\80c65-
*/ jd9GueV*(
public void sort(int[] data) { f\sxx!kt
MaxHeap h=new MaxHeap(); 7\sJ=*
h.init(data); `=A*ei5
for(int i=0;i h.remove(); c+l1#[Dnc
System.arraycopy(h.queue,1,data,0,data.length); DPuz'e*
} (VYY-%N`
zGrUl|j
private static class MaxHeap{ hLyD#XCFA
6Q<^,`/T
void init(int[] data){ [AzQP!gi
this.queue=new int[data.length+1]; i{8T 8
for(int i=0;i queue[++size]=data; r<]Db&k
fixUp(size); M)Iu'
} aRBTuLa)fo
} }`g:)gJ
?{s!.U[T@
private int size=0; xOCHP|?
OhmKjY/}
private int[] queue; % AqUVt9}
"mbcZ5_
public int get() { x{Y}1+Y4
return queue[1]; shbPy
} Nz`4q%+
AV0m31b
public void remove() { nQuiRTU<
SortUtil.swap(queue,1,size--); b#U nE
fixDown(1); 8spoDb.S
} YQ}xr^VA
file://fixdown (Dr g
private void fixDown(int k) { IUco 8
int j; kTG4h@w
while ((j = k << 1) <= size) { -TKS`,#
if (j < size %26amp;%26amp; queue[j] j++; 70p1&Y7or
if (queue[k]>queue[j]) file://不用交换 8X=cGYC#
break; TRwlUC3hQ
SortUtil.swap(queue,j,k); B .p&,K
k = j; f,9jK9/$
} (~F{c0\C
} O5HK2Xg,C
private void fixUp(int k) { V5y8VT=I
while (k > 1) { hC ^|
int j = k >> 1; p<1z!`!P
if (queue[j]>queue[k]) _@CY_`a
break; ;Ee!vqD2
SortUtil.swap(queue,j,k); u.( WW(/N
k = j; QFOmnbJg
} ea3;1-b:
} Ju3-ZFUS4
-lHSojq~H
} RXa&*Jtr -
ZD{%0uh
} +]|aACt]
hzIP ?0^E
SortUtil： -x~h.s,
m9bR %j
package org.rut.util.algorithm; &jCT-dj
* z|i{=W F
import org.rut.util.algorithm.support.BubbleSort; Wx#((T
import org.rut.util.algorithm.support.HeapSort; < aeBhg%
import org.rut.util.algorithm.support.ImprovedMergeSort; \F]X!#&+
import org.rut.util.algorithm.support.ImprovedQuickSort; )(~s-x^\z@
import org.rut.util.algorithm.support.InsertSort; oJC-?
import org.rut.util.algorithm.support.MergeSort; OgJd^
import org.rut.util.algorithm.support.QuickSort; su]CaHU
import org.rut.util.algorithm.support.SelectionSort; lqFDX d
import org.rut.util.algorithm.support.ShellSort; ;cQhs7m(9
v3|-eWet^
/** HRkO.230
* @author treeroot ^)ouL25Z*2
* @since 2006-2-2 E"!I[
* @version 1.0 yM$@*od
*/ &7* |rshZ
public class SortUtil { )i8Hdtn
public final static int INSERT = 1; V4cCu~(3;~
public final static int BUBBLE = 2; S,Q!Xb@
public final static int SELECTION = 3; K#bdb
public final static int SHELL = 4; T^LpoN/T
public final static int QUICK = 5; }gL:"C"~
public final static int IMPROVED_QUICK = 6; QC7Ceeh]4
public final static int MERGE = 7; xU$A/!oK
public final static int IMPROVED_MERGE = 8; Wbo{v r[2+
public final static int HEAP = 9; ySP1,xq
L/Cp\|~ O
public static void sort(int[] data) { L[\m{gN
sort(data, IMPROVED_QUICK); n1OxT"tD
} .kpL?_
private static String[] name={ l`9<mL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SS?^-BI
}; &phers
/BB(riG
private static Sort[] impl=new Sort[]{ ^VsX9
new InsertSort(), ~!( (?8"
new BubbleSort(), +2%ih!
new SelectionSort(), lSv?!2
new ShellSort(), P" +!mSe^~
new QuickSort(), 61|uvTX
new ImprovedQuickSort(), Kx.'^y
new MergeSort(), ]h4^3
new ImprovedMergeSort(), :;[pl|}tM
new HeapSort() yZup4#>8
}; ZH8O%>!
V<~.:G$3H
public static String toString(int algorithm){ <<#-IsT
return name[algorithm-1]; _'9("m V
} [fF0Qa-
=O= 0 D
public static void sort(int[] data, int algorithm) { :s8^nEK
impl[algorithm-1].sort(data); K)z{R n
} 6"@+Jz
r*#ApM"L
public static interface Sort { .!uXhF'
public void sort(int[] data); ~R7F[R
} Oax*3TD
7_Yxz$m
public static void swap(int[] data, int i, int j) { >TSPEvWc
int temp = data; eF]`?AeWQ
data = data[j]; l*^J}oY
data[j] = temp; W[trsFP1?
} @tQu3Rq@
} 3vx5dUgl,