[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; bsv!z\}
} %`\=qSf*
int i1=l; '#NDR:J"
int i2=mid+1; JmF:8Q3H
for(int cur=l;cur<=r;cur++){ IN?6~O p
if(i1==mid+1) ~nRbb;M
data[cur]=temp[i2++]; i;fU],aK!
else if(i2>r) E~ +g6YlT
data[cur]=temp[i1++]; ub9,Wd"^
else if(temp[i1] data[cur]=temp[i1++]; T;sF@?
else :=?od 0]W
data[cur]=temp[i2++]; 9s&dN
} MeDlsO
} N?v}\PU
MnTqWC90
} tQ,3nI!|xF
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改进后的归并排序: tvcM< e20
y`a]##1j$M
package org.rut.util.algorithm.support; mGh8/Xt
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import org.rut.util.algorithm.SortUtil; s[Whg!2~
*]*0uo
/** eOZ"kw"uHu
* @author treeroot _j2q
* @since 2006-2-2 JYrOE"!h
* @version 1.0 ,m[#<}xXA
*/ j7yUya&
public class ImprovedMergeSort implements SortUtil.Sort { Bmv5yc+;
|h-e+Wh1
private static final int THRESHOLD = 10; @+yjt'B
hxkwT
/* ( 9(NP_s
* (non-Javadoc) IVso/!
* $fAZ^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?X@uR5?{
*/ k-I U}|Xz
public void sort(int[] data) { \[<8AV"E-'
int[] temp=new int[data.length]; n'83P%x
mergeSort(data,temp,0,data.length-1); h3j`X'
} GP0}I@>?
^_t7{z%sA[
private void mergeSort(int[] data, int[] temp, int l, int r) { jIjW +D`
int i, j, k; +[7 DRT:
int mid = (l + r) / 2; K>_~|ZN1C8
if (l == r) TJUYd9O4[
return; PQXCT|iJ
if ((mid - l) >= THRESHOLD) U*\1d
mergeSort(data, temp, l, mid); Zp+orc7
else 6ag0c&k
insertSort(data, l, mid - l + 1); "10.,QK
if ((r - mid) > THRESHOLD) 'o|=_0-7W
mergeSort(data, temp, mid + 1, r); qPn!.m$/
else _-z;
insertSort(data, mid + 1, r - mid); WO=P~F<
C ett*jm_
for (i = l; i <= mid; i++) { og`g]Z<I
temp = data; T/P
} bA07zI2
for (j = 1; j <= r - mid; j++) { Da ]zbz%%
temp[r - j + 1] = data[j + mid]; ;R7+6
} /X;! F>
int a = temp[l]; ^&\<[\
int b = temp[r]; m%U$37A1
for (i = l, j = r, k = l; k <= r; k++) { / !aVv
if (a < b) { GpXU&A'r
data[k] = temp[i++]; zU";\);
a = temp; :nS p
} else { ~j[mME}
data[k] = temp[j--]; /! M%9gu
b = temp[j]; uOJso2Mx
} @5{h+^
} D 4<,YBvV
} 9s#*~[E*
3w8v.J8q
/** 6\RZ[gA?
* @param data dG)}H_
* @param l &{S@v9~IT
* @param i b q8nV
*/ ,"Nb;Yhg
private void insertSort(int[] data, int start, int len) { wLKC6@ W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QJ,~K&?
} U]"6KS
} t:%u4\nZ;
} dC?l%,W
} 9PG3cCr?
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堆排序： f<vZ4 IU
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package org.rut.util.algorithm.support; Lv@'v4.({
4YA1~7R
import org.rut.util.algorithm.SortUtil; !-tVt D
K}QZdN']
/** @gi / 1cq
* @author treeroot E+P-)bRa
* @since 2006-2-2 QLb!e"C
* @version 1.0 95*=&d
*/ 7upN:7D-
public class HeapSort implements SortUtil.Sort{ M<xF4L3]
'h>CgR^NM1
/* (non-Javadoc) ?zK\!r{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }VqCyJu&{
*/ +GT"n$)+
public void sort(int[] data) { ?S'Wd=
MaxHeap h=new MaxHeap(); .x_F4#Ka
h.init(data); ?-=<7 ~$
for(int i=0;i h.remove(); v\-7sgZR
System.arraycopy(h.queue,1,data,0,data.length); KA elq*
} VujIKc#4
m">2XGCn
private static class MaxHeap{ i)@H
`Gh#2U
void init(int[] data){ ]QKKtvN
this.queue=new int[data.length+1]; ^`fqK4<
for(int i=0;i queue[++size]=data; ~\u?Nf~L
fixUp(size); CUx[LZR7m
} -|GX]jx(Y
} CzI/Z+\
sK7b4gmK
private int size=0; ,R=)^Gh{
5)i+x-
private int[] queue; qTV.DCP
QoS]QY'bZ
public int get() { zRgl`zREr
return queue[1]; Z(BZGO<
} aA-s{af
LuWY}ste
public void remove() { BCt>P?,UO
SortUtil.swap(queue,1,size--); -fDW>]_
fixDown(1); <,Fj}T-
} !gj_9"<
file://fixdown $`_xP1bUT
private void fixDown(int k) { d>Ky(wS
int j; B+[L/C}=;
while ((j = k << 1) <= size) { v8\pOI}c
if (j < size %26amp;%26amp; queue[j] j++; uOb}R
if (queue[k]>queue[j]) file://不用交换 *u!l"0'\
break; =/bC0bb{i
SortUtil.swap(queue,j,k); &+df@U6i
k = j; m,r>E%;Cj
} Q;=3vUN
} xn}HB
private void fixUp(int k) { 3H`ES_JL
while (k > 1) { J:0`*7
int j = k >> 1; U8n=Ro
if (queue[j]>queue[k]) Ns.{$'ll
break; h`:B8+k
SortUtil.swap(queue,j,k); c4M]q4]F
k = j; kjj?X|Un
} <'vtnz
} **F-#",
<4%PT2R
} goc"+K
NQ,2pM<*-
} cL:hjr"
3jw4#GW
SortUtil： yi,Xs|%.
bqRO-\vO
package org.rut.util.algorithm; '|nAGkA
F*=}}H/
import org.rut.util.algorithm.support.BubbleSort; 8s>OO&
import org.rut.util.algorithm.support.HeapSort; fi'\{!!3m^
import org.rut.util.algorithm.support.ImprovedMergeSort; VX e7b
import org.rut.util.algorithm.support.ImprovedQuickSort; qnnP*15`
import org.rut.util.algorithm.support.InsertSort; P*kC>lvSv
import org.rut.util.algorithm.support.MergeSort; eKL3Y_5p@
import org.rut.util.algorithm.support.QuickSort; )`}4rD^b
import org.rut.util.algorithm.support.SelectionSort; }c'T]h\S
import org.rut.util.algorithm.support.ShellSort; zX&wfE8T
iH)-8Q
/** 1p(9hVA
* @author treeroot n@9R|biO
* @since 2006-2-2 z`Xc] cPi
* @version 1.0 XVYj X
*/ @O)1Hnm
public class SortUtil { TFtD>q X
public final static int INSERT = 1; R^Y_i
public final static int BUBBLE = 2; |4F'Zu}g>
public final static int SELECTION = 3; Z)G@ahOQ
public final static int SHELL = 4; y-o54e$4Cq
public final static int QUICK = 5; M$2lK^2L
public final static int IMPROVED_QUICK = 6; @T~~aQFk
public final static int MERGE = 7; r8Z} mvLM
public final static int IMPROVED_MERGE = 8; n hGh5,
public final static int HEAP = 9; y-)5d
5Pd^Sew
public static void sort(int[] data) { #LfoG?k1K
sort(data, IMPROVED_QUICK); 3=IY0Q>/(
} J;Veza
private static String[] name={ W4:#=.m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wE#z)2?`\
}; M(<.f}yZQ
n4/Jx*
private static Sort[] impl=new Sort[]{ hmJa1fw=
new InsertSort(), }M~[8f ]
new BubbleSort(), >\Ml\CyL
new SelectionSort(), A(wuRXnVWK
new ShellSort(), !k8j8v&
new QuickSort(), M[?0 ^ FBx
new ImprovedQuickSort(), dU#}Tk
new MergeSort(), ,5P tB]8&3
new ImprovedMergeSort(), ^(1S`z$
new HeapSort() 7aeyddpM
}; B#[.c$
BS+=*3J
public static String toString(int algorithm){ "ac$S9@~
return name[algorithm-1]; @fI2ZWN|
} QP!0I01
E,7b=t
public static void sort(int[] data, int algorithm) { NSQ#\:3:S
impl[algorithm-1].sort(data); GqD_6cdh
} X5c)T}pyv
3zo:)N\K
public static interface Sort { !Q5NV4gd+
public void sort(int[] data); n^%",*8gD*
} _:VIlg U
}vt>}%%
public static void swap(int[] data, int i, int j) { 7kh(WtUz
int temp = data; 'klYGp
data = data[j]; sjwD x0(7=
data[j] = temp; |Q*{yvfEo
} |]j2T8_=
} CG[04y