[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; xULcS :Q
} AnW72|=A(
int i1=l; BXxl-x
int i2=mid+1; [$]Kp9YD
for(int cur=l;cur<=r;cur++){ 7,!$lT#
if(i1==mid+1) LvcGh
data[cur]=temp[i2++]; 1=^edQ+
else if(i2>r) RLE6=#4
data[cur]=temp[i1++]; Eo@b)h
else if(temp[i1] data[cur]=temp[i1++]; +]*hzWbe
else 9`| ^cL*6
data[cur]=temp[i2++]; sI% =G3o=
} ){M)0,:
} (\A~SKEX
IS[&V&.n
} .8~zgpK
J.g4I|{
改进后的归并排序: F8En)#
O@)D%*;v
package org.rut.util.algorithm.support; 7zWr5U.
w"/RI#7.
import org.rut.util.algorithm.SortUtil; +H `FC
]*\m@lWu
/** ;qwNM~
* @author treeroot fo5+3iu^
* @since 2006-2-2 [KT1.5M[
* @version 1.0 n1;y"`gHk
*/ 3B6"T;_
public class ImprovedMergeSort implements SortUtil.Sort { .`5BgX7W
p(`?y:.3
private static final int THRESHOLD = 10; W4V !7_
|j>fsk~
/* "U6:z M
* (non-Javadoc) *(*3/P4D
* NUjo5.7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0X: :<N@
*/ u''~nSR3&
public void sort(int[] data) { Smjg[
int[] temp=new int[data.length]; %J?"ZSh
mergeSort(data,temp,0,data.length-1); |d0,54!
} Q?7:XbN
0oU;Cmw.
private void mergeSort(int[] data, int[] temp, int l, int r) { e/nc[
int i, j, k; _=d X01
int mid = (l + r) / 2; 1}>uY
if (l == r) c=Y8R/G<
return; hq[RU&\
if ((mid - l) >= THRESHOLD) mok%TK
mergeSort(data, temp, l, mid); =3= $F%
else ^V5g[XL2
insertSort(data, l, mid - l + 1); gXThdNU4G
if ((r - mid) > THRESHOLD) Qk_`IlSd
mergeSort(data, temp, mid + 1, r); cV+x.)a.
else .dStV6
insertSort(data, mid + 1, r - mid); SGUu\yS&s
V {H/>>k7
for (i = l; i <= mid; i++) { BMlu>,
temp = data; ;;cPt44s
} cy+EJq I
for (j = 1; j <= r - mid; j++) { <z+b88D
temp[r - j + 1] = data[j + mid]; g\O&gNq<)-
} |4tnG&=
int a = temp[l]; SF#Rc>v
int b = temp[r]; e_{!8u.+
for (i = l, j = r, k = l; k <= r; k++) { &GetRDr
if (a < b) { 8fI&-uP{g
data[k] = temp[i++]; Pu-/*Fx
a = temp; nL[zXl
} else { v!b 8_0~u6
data[k] = temp[j--]; wWU5]v
b = temp[j]; `4N{x.N
} |loo^!I
} !"e~HZmr
} c'8a)j$$+
*gxo!F}
/** ^& R H]q
* @param data _a e&@s1
* @param l 6QC=:_M;
* @param i `T \"B%
*/ :1O1I2L0
private void insertSort(int[] data, int start, int len) { w`?Rd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |0jmOcZF
} P4~=_Hh
} G L> u3K
} W6>SYa
} p@se 5~
s?2DLXv}!
堆排序： ~^GY(J'
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package org.rut.util.algorithm.support; s, 8a1o
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import org.rut.util.algorithm.SortUtil; jW G=k#WN
Y^(Sc4 W
/** 3w B03\P
* @author treeroot K[XFJ9
* @since 2006-2-2 vj23j[!|
* @version 1.0 Po:)b
*/ JvZNr?_w%
public class HeapSort implements SortUtil.Sort{ P=j89-e
WLTraB[?
/* (non-Javadoc) a V4p0s6ZZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rU{E}
*/ DjX*2O
public void sort(int[] data) { 8jnz;;|
MaxHeap h=new MaxHeap(); +cw;a]o^>
h.init(data); x-e?94}^
for(int i=0;i h.remove(); C98 Ks
System.arraycopy(h.queue,1,data,0,data.length); t1I` n(]n
} aFj)s?$4]K
`Xbk2KD p
private static class MaxHeap{ Dw@0P
]/p)XHKo
void init(int[] data){ 3xJ_%AD\'
this.queue=new int[data.length+1]; c==` r C
for(int i=0;i queue[++size]=data; !U@?Va~Zn
fixUp(size); \y-Lt!}
} z'G~b[kG4n
} +N9(o+UrU
r`Qzn" H
private int size=0; mv1_vF:
ZjE!? '(ef
private int[] queue; K,>D%mJ
X:*Ut3"
public int get() { v;9VX
return queue[1]; 0.^9)v*i
} EcA@bZ0
rf%E+bh4
public void remove() { );^] is~
SortUtil.swap(queue,1,size--); a;a2x .<
fixDown(1); ~$0Qvyb>
} V4RtH
file://fixdown HS|X//]
private void fixDown(int k) { iB Ld*B|#K
int j; *{]9e\DF
while ((j = k << 1) <= size) { DcN s`2
if (j < size %26amp;%26amp; queue[j] j++; c1IK9X*
if (queue[k]>queue[j]) file://不用交换 8 0>qqz
break; kq[*q-:"x
SortUtil.swap(queue,j,k); Z=sCYLm
k = j; F<y5zqGy@
} U$J l5[`F^
} BfLh%XC
private void fixUp(int k) { #'Q_eBX
while (k > 1) { )fz)Rrr
int j = k >> 1; H)$-T1Wx4
if (queue[j]>queue[k]) 4#?OxvH
break; =kq!e
SortUtil.swap(queue,j,k); &v+8RY^F=
k = j; eUYd0L!
} fiSc\C~
} &p1Et
EPCu
} <_@ S@t)
3F ;+D
} N(v<*jn
7d?'~}j
SortUtil： lHwQ'/r
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package org.rut.util.algorithm; U}7a;4?
(!Q^.C_m
import org.rut.util.algorithm.support.BubbleSort; 1}mIzrY
import org.rut.util.algorithm.support.HeapSort; :]Jwcp
import org.rut.util.algorithm.support.ImprovedMergeSort; *5iNw_&
import org.rut.util.algorithm.support.ImprovedQuickSort; zqg4@" p
import org.rut.util.algorithm.support.InsertSort; _f%Wk>A4
import org.rut.util.algorithm.support.MergeSort; mh>)N"
import org.rut.util.algorithm.support.QuickSort; xI}h{AF7
import org.rut.util.algorithm.support.SelectionSort; N^A&DrMF
import org.rut.util.algorithm.support.ShellSort; %N@454enH
[G^ir
/** _"%ef"oPh
* @author treeroot b>AFhj:
* @since 2006-2-2 Mt)`hR+2
* @version 1.0 [)|P-x-<
*/ .,[zI@9
public class SortUtil { _>B0q|]j4'
public final static int INSERT = 1; +Gi~VW.
public final static int BUBBLE = 2; 3Xaw
public final static int SELECTION = 3; ;JMd(\+-
public final static int SHELL = 4; Ob2H7!
public final static int QUICK = 5; pPm[<^\#S
public final static int IMPROVED_QUICK = 6; Esw#D90q
public final static int MERGE = 7; #*;(%\q}
public final static int IMPROVED_MERGE = 8; >}h/$bU
public final static int HEAP = 9; P]-d(N}/H
dhpEBJ
public static void sort(int[] data) { pc<")9U%/
sort(data, IMPROVED_QUICK); >I AwNr
} iy Zs:4jkc
private static String[] name={ Fku9hB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9VdVom|e
}; d paZ6g
GEXT8f(7
private static Sort[] impl=new Sort[]{ x(h(a#,r
new InsertSort(), Ce}wgKzr
new BubbleSort(), lq=|=
new SelectionSort(), 8 ZD1}58U4
new ShellSort(), .P.TqT@)r
new QuickSort(), gbM#jhQ
new ImprovedQuickSort(), "TA r\;[
new MergeSort(), :<4:h.gO8
new ImprovedMergeSort(), QN:gSS{30
new HeapSort() Ha9A5Ao}0
}; [_Y\TdR
#bgW{&_y
public static String toString(int algorithm){ 'F^nW_ryW
return name[algorithm-1]; n!~mdI&
} {X<mr~
ao>bnRXR
public static void sort(int[] data, int algorithm) { Dp!3uR']p
impl[algorithm-1].sort(data); *`[dC,+`.
} |ZW%+AQ|
'$*d:1
public static interface Sort { {@1.2AWg
public void sort(int[] data); x&7%U
} TDXLxoC?
>lQ&^9EI%
public static void swap(int[] data, int i, int j) { EL$"MT}p
int temp = data; T1m'+^?"
data = data[j]; 3/mVdU?U
data[j] = temp; ^:W.R7|
} q/~U[.C
} oomB/"Z