[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; "TJu<O"2
} tRdf:F\X
int i1=l; .U0Gm_c0
int i2=mid+1; hi[nUG(OI
for(int cur=l;cur<=r;cur++){ '|SO7}`;Q
if(i1==mid+1) =Pl@+RgK+
data[cur]=temp[i2++]; 2nkA%^tR
else if(i2>r) =8T!ldVxES
data[cur]=temp[i1++]; nv:Qd\UM
else if(temp[i1] data[cur]=temp[i1++]; v]V N'Hs?
else k\#;
data[cur]=temp[i2++]; cpjwc@UMe
} H:c5 q0O^x
} bXnUz?1!d
UUV5uDe>i
} F<I*?${[
ki'$P.v{$w
改进后的归并排序: Xk4wU$1F
4$KDf;m@
package org.rut.util.algorithm.support; tS2&S 6u
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import org.rut.util.algorithm.SortUtil; w[-)c6JyE
wN!\$i@E:
/** %1Q:{m
* @author treeroot 0A)0Zw
* @since 2006-2-2 py'vD3Q
* @version 1.0 Gw<D'b)!
*/ AabQ)23R2
public class ImprovedMergeSort implements SortUtil.Sort { =PRQ3/?5
z^QrIl/<c2
private static final int THRESHOLD = 10; n?@zp<
Rs<q^w]
/* Qfn:5B]tI
* (non-Javadoc) #<*.{"T
* eG,x\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C(XV YND3
*/ dBXiLrEbs
public void sort(int[] data) { [~{F(Le
int[] temp=new int[data.length]; S1|u@d'
mergeSort(data,temp,0,data.length-1); `yv?PlKL
} eyMn! a
2&4nf/sE
private void mergeSort(int[] data, int[] temp, int l, int r) { ;l*%IMB
int i, j, k; +\T8`iCFB
int mid = (l + r) / 2; o`S``?`^)^
if (l == r) PeIx41. +s
return; r W`7<3
if ((mid - l) >= THRESHOLD) 5b}w
mergeSort(data, temp, l, mid); S&!(h {O
else jKml:)k
insertSort(data, l, mid - l + 1); Y#9W]78He
if ((r - mid) > THRESHOLD) n|{K_! f
mergeSort(data, temp, mid + 1, r); +LRKS
else 0/)2RmF
insertSort(data, mid + 1, r - mid); -iR2UE@M
dC({B3#e{
for (i = l; i <= mid; i++) { qf x*a88
temp = data; sGu.G
} xT+_JT65
for (j = 1; j <= r - mid; j++) { O6G\0o
temp[r - j + 1] = data[j + mid]; KHAc!4lA
} ~!Nj DDk
int a = temp[l]; fmuh9Z
int b = temp[r]; Q-oDmjU
for (i = l, j = r, k = l; k <= r; k++) { '.bf88D
if (a < b) { TTVmm{6
data[k] = temp[i++]; L(;$(k-/(
a = temp; O{l4 f:51
} else { zTa5N
data[k] = temp[j--]; So&gDR;b
b = temp[j]; /"Vd( K2Z
} XjN4EDi+E
} B"_O!
} 2GptK"MrD
V;%ug'j
/** _;k<=ns(=
* @param data ,H{9`a#+:
* @param l 'SFAJ
* @param i ,'s}g,L
*/ ?62Im^1/
private void insertSort(int[] data, int start, int len) { qLCNANWnd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9`*ST(0/
} `D77CC]vU
} 5pJe`}O4
} v#Rh:#7O%U
} LaQ7A,]
h+W$\T)
堆排序： 'f6H#V*C
@[g7\d
package org.rut.util.algorithm.support; uY.Ns ?8
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import org.rut.util.algorithm.SortUtil; G(7%*@SX
iO$87!
/** 9G/!18 X?f
* @author treeroot w0~%,S
* @since 2006-2-2 @R5^J{T
* @version 1.0 e\V -L_
*/ 2Xe1qzvo
public class HeapSort implements SortUtil.Sort{ BH0m[9nU;
i.t%a{gL
/* (non-Javadoc) G!6b )4L-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5sT3|yq
*/ to?!qxn
public void sort(int[] data) { 1sHjM%
MaxHeap h=new MaxHeap(); mXz*Gi
h.init(data); `6~0W5
for(int i=0;i h.remove(); :K6JrS
System.arraycopy(h.queue,1,data,0,data.length); zr|DC] 3
} I>;{BYPV
yJI~{VmU7
private static class MaxHeap{ 3=d%WPgQ
+4:eb)e
void init(int[] data){ e#*3X4<\K
this.queue=new int[data.length+1]; (xb2H~WrN
for(int i=0;i queue[++size]=data; _f^6F<!
fixUp(size); lEHx/#qt9
} UH MJ(.Wa-
} PuJ3#H T
VW\S>=O99
private int size=0; b$b;^nly
bA)nWWSg=
private int[] queue; J1G}l5N
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public int get() { %D4)Bqr
return queue[1]; &G"s!:
} i%FC lMF
;5ki$)v"
public void remove() { N-K/jY
SortUtil.swap(queue,1,size--); r!&174DSR1
fixDown(1); B@(d5i{h
} #4Z e2T|
file://fixdown 1b~21n
private void fixDown(int k) { #+ch
int j; #NFB=oJI
while ((j = k << 1) <= size) { 94w)Yln
if (j < size %26amp;%26amp; queue[j] j++; Q$U5[TZm
if (queue[k]>queue[j]) file://不用交换 D3C7f'
break; fQ5v?(
SortUtil.swap(queue,j,k); rn|]-^ku/
k = j; ?>B?*IK!
} -~]H5er`
} Mc,|C)
private void fixUp(int k) { O.+J%],
while (k > 1) { ZPH_s^
int j = k >> 1; 2p&$bft
if (queue[j]>queue[k]) @*y4uI6&
break; [`@M!G.
SortUtil.swap(queue,j,k); 7su2A>Ix
k = j; qTJ0}F
} M#gxiN
} "%Ok3Rvv
." xP{
} m8L *LB
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} ,1{qZ(l1
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SortUtil： t)&U'^
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package org.rut.util.algorithm; ?+Gt?-! 5q
&b|RoPV
import org.rut.util.algorithm.support.BubbleSort; vQ}ZfP
import org.rut.util.algorithm.support.HeapSort; x#`p.sfVo
import org.rut.util.algorithm.support.ImprovedMergeSort; :xr^E]
import org.rut.util.algorithm.support.ImprovedQuickSort; 7GO9z<m)
import org.rut.util.algorithm.support.InsertSort; _|u}^MLO
import org.rut.util.algorithm.support.MergeSort; &za }THm
import org.rut.util.algorithm.support.QuickSort; <J<"`xKL
import org.rut.util.algorithm.support.SelectionSort; K80f_iT5
import org.rut.util.algorithm.support.ShellSort; ,,uhEoH
;8^k=8
/** H1c8]}
* @author treeroot R$awo/'^
* @since 2006-2-2 i3eF_
* @version 1.0 _-C/sp^
*/ G*4I;'6
public class SortUtil { c K\
public final static int INSERT = 1; xeFx!$3
public final static int BUBBLE = 2; U,WMP<5&
public final static int SELECTION = 3; ^UKAD'_#%O
public final static int SHELL = 4; 1gV?}'jq
public final static int QUICK = 5; hV(^Y)f
public final static int IMPROVED_QUICK = 6; Z;G*wM"
public final static int MERGE = 7; F- -g?Q^
public final static int IMPROVED_MERGE = 8; D>y5&`
public final static int HEAP = 9; @/^<9
8r(awp
public static void sort(int[] data) { \oWpyT _
sort(data, IMPROVED_QUICK); `D(V_WZ
} u:APGR^
private static String[] name={ Zp7Pw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5a/A?9?,
}; HDV-qYD|O~
R5ra*!|L)
private static Sort[] impl=new Sort[]{ ~2k.x*$
new InsertSort(), z0rYzn?MR
new BubbleSort(), cjN)3L{
new SelectionSort(), F\r"Y)|b=
new ShellSort(), "d)YqQ
new QuickSort(), #ELeW3 S}
new ImprovedQuickSort(), b\0>uU
new MergeSort(), B2kZ_4rB
new ImprovedMergeSort(), u9 &$`N_G
new HeapSort() QQW}.>N
}; :6(\:
)G)6D"5,+G
public static String toString(int algorithm){ RyK~"CWT
return name[algorithm-1]; |p/*OFC6
} /p<9C?
`o#(YEu
public static void sort(int[] data, int algorithm) { inU5eronuj
impl[algorithm-1].sort(data); LVg#E*J
} /[_aK0U3
]t)N3n6Bc
public static interface Sort { 5! );4+
public void sort(int[] data); =;-C;gn:w
} =Smd/'`_
{j$2=0Cec
public static void swap(int[] data, int i, int j) { i975)_X(
int temp = data; y!1X3X,V
data = data[j]; Jpduk&u
data[j] = temp; b3%x&H<j
} MZ}0.KmaZ
} T*/I4"