[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; UpL?6)
} C|5eV=f)P
int i1=l; R!0O[i
int i2=mid+1; Qv(}*iq]
for(int cur=l;cur<=r;cur++){ 0V`s 3,k
if(i1==mid+1) s+YQ :>F
data[cur]=temp[i2++]; /zMiy?
else if(i2>r) mk~&>\
data[cur]=temp[i1++]; G4{ zt3{
else if(temp[i1] data[cur]=temp[i1++]; PCF!Y(l
else B4bC6$Lg
data[cur]=temp[i2++]; Bf~
} U=\ZeYK.
} x[U/ 8#f&
G&)A7WaC
} H{ p
;| ##~Y.9
改进后的归并排序: S75wtz)e
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package org.rut.util.algorithm.support; 9F845M
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import org.rut.util.algorithm.SortUtil; \< <u
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/** d@#!,P5`
* @author treeroot bccJVwXv
* @since 2006-2-2 <f%JZ4p*
* @version 1.0 xPWzm hF
*/ !*HH5qh6
public class ImprovedMergeSort implements SortUtil.Sort { w&jyijk(
!(~eeE}|lM
private static final int THRESHOLD = 10; W(Z_ac^e[
+[:"$?J
/* Qz2Yw `
* (non-Javadoc) Gu}|CFL\
* Qu,W3d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3?iRf6;n
*/ ~KHGh29
public void sort(int[] data) { ,#hS#?t
int[] temp=new int[data.length]; ZgQ4~s
mergeSort(data,temp,0,data.length-1); +kP)T(6
} t}>6"^}U
td%]l1
private void mergeSort(int[] data, int[] temp, int l, int r) { JV(qTb W
int i, j, k; De%WT:v
int mid = (l + r) / 2; `[3Iz$K=
if (l == r) 3`uv/O2~i
return; secD `]
if ((mid - l) >= THRESHOLD) U\a.'K50F
mergeSort(data, temp, l, mid); jq:FDyOAW
else 3B!lE(r%J
insertSort(data, l, mid - l + 1); Cx2s5vJX4p
if ((r - mid) > THRESHOLD) wi^zXcVj
mergeSort(data, temp, mid + 1, r); eQ`TW'[9_6
else 0O<g)%Vz>
insertSort(data, mid + 1, r - mid); xpCzx=n3.m
+EjH9;gx
for (i = l; i <= mid; i++) { =cI -<0QSn
temp = data; 0h/gqlTK1
} T;K@3]FbX
for (j = 1; j <= r - mid; j++) { E/2kX3}
temp[r - j + 1] = data[j + mid]; O32p8AxEz
} F^.w:ad9<
int a = temp[l]; Dg3Sn|!f
int b = temp[r]; o7 ^t- L
for (i = l, j = r, k = l; k <= r; k++) { OD7tM0Wn
if (a < b) { iU"jV*P]
data[k] = temp[i++]; d2`m0U
a = temp; Aq674
} else { K>iM6Uv
data[k] = temp[j--]; :tU&d(8
b = temp[j]; -9TNU7^
} aNLRUdc.
} H_RV#BW&
} l/0"'o_0v#
xO?w8*d
/** 8oiO:lyLSt
* @param data p vone,y2
* @param l _^K)>
* @param i IaMZPl
*/ XgL-t~_
private void insertSort(int[] data, int start, int len) { jkCa2!WQ'i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C^9G \s'
} c-3-,pyM_T
} Ks'msSMC
} reseu*5
} h&@A'om~
jo-jPYH T
堆排序： 0?OTa<c
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package org.rut.util.algorithm.support; :cU6W2EV
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import org.rut.util.algorithm.SortUtil; "2}{lu
<%w)EQf4m
/** qd$Y"~Mco
* @author treeroot [Q+8Ku
* @since 2006-2-2 iR}3 [
* @version 1.0 _`3'D`s
*/ !~sgFR8W
public class HeapSort implements SortUtil.Sort{ b!(ew`Y;
rq#8}T>
/* (non-Javadoc) ]rwHr;.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4I"%GN[tA
*/ z"7I5N
public void sort(int[] data) { BhAWIH8@C
MaxHeap h=new MaxHeap(); M$Sq3m`{!
h.init(data); k OYF]^uJ
for(int i=0;i h.remove(); 8&[Lr o9
System.arraycopy(h.queue,1,data,0,data.length); I^}q;L![\
} ++>HU{
<jt_<p +
private static class MaxHeap{ KMs[/|HX\
#kGgzO
void init(int[] data){ #eRrVjbo
this.queue=new int[data.length+1]; |l\!
for(int i=0;i queue[++size]=data; WG~|sLg
fixUp(size); hY*ylzr83
} qKt*<KGeY
} *??!~RE
qg7qTF&
private int size=0; 'YQVf]4P
{@1;kG
private int[] queue; sR~D3-
pFB^l|\ ]
public int get() { cy_'QS$W
return queue[1]; j 3/ I=
} s&Bk@a8
^nO0/nqz]
public void remove() { xi+bBqg<.K
SortUtil.swap(queue,1,size--); ;)nkY6-
fixDown(1); <@F.qMl
} bQ%6z}r
file://fixdown ig-V^P
private void fixDown(int k) { Uz4!O
int j; ;`")3~M3*
while ((j = k << 1) <= size) { u& 4i=K'x8
if (j < size %26amp;%26amp; queue[j] j++; vJ +sdG
if (queue[k]>queue[j]) file://不用交换 8-JOfq}s
break; ^l,(~03_
SortUtil.swap(queue,j,k); yT$CImP73
k = j; T<o^f n,H
} EWb'#+BP
} k<&zVV'
private void fixUp(int k) { XY_hTHJ
while (k > 1) { <w,NMu"
int j = k >> 1; %yyvB5Y^
if (queue[j]>queue[k]) RZY[DoF8u
break; @Sr{6g*I
SortUtil.swap(queue,j,k); {th=MldJ?
k = j; 54lU~ "
} kT@m*Etr{
} DPWt=IFU
l1M %
} c*m7'\
mp'Z.4
} Yg<L pjq5X
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SortUtil： #oYPe:8|m
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package org.rut.util.algorithm; B5A/Iv)2
w$)NW57[|
import org.rut.util.algorithm.support.BubbleSort; C{*' p+f
import org.rut.util.algorithm.support.HeapSort; 3BZa}Q_
import org.rut.util.algorithm.support.ImprovedMergeSort; 7I$~E
import org.rut.util.algorithm.support.ImprovedQuickSort; '!hA!eo>J
import org.rut.util.algorithm.support.InsertSort; yjF;%A/0
import org.rut.util.algorithm.support.MergeSort; "^froQ{"T
import org.rut.util.algorithm.support.QuickSort; ia9=&Hy])
import org.rut.util.algorithm.support.SelectionSort; z [|:HS&
import org.rut.util.algorithm.support.ShellSort; wB(X(nr
mi';96
/** LJ8 t@ui
* @author treeroot gh?3[q6
* @since 2006-2-2 ;_K3/:
* @version 1.0 XfYbWR
*/ )K}-z+$)k
public class SortUtil { mfW}^mu
public final static int INSERT = 1; >iV2>o_
public final static int BUBBLE = 2; b)[2t^zG
public final static int SELECTION = 3; mG*ER^Y@D
public final static int SHELL = 4; ez-jVi-Fi
public final static int QUICK = 5; q\$k'(k>35
public final static int IMPROVED_QUICK = 6; m ?e::W
public final static int MERGE = 7; C>:,\=y%
public final static int IMPROVED_MERGE = 8; tH)fu%:p
public final static int HEAP = 9; J+(B]8aj
Pf:;iXH?
public static void sort(int[] data) { w paI}H#
sort(data, IMPROVED_QUICK); sU$<v( `"
} #iiXJnG
private static String[] name={ M*-]<!))7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <-h[I&."
}; {y%|Io`P
1a]P+-@u[
private static Sort[] impl=new Sort[]{ J*Q+$Ai~
new InsertSort(), %Q080Ltet
new BubbleSort(), ?8/T#ox
new SelectionSort(), hh[@q*C
new ShellSort(), !{+a2wi
new QuickSort(), 1\X_B`xwD
new ImprovedQuickSort(), . #FJM2Xk
new MergeSort(), Y2TXWl,Jk
new ImprovedMergeSort(), H[Q3M~_E
new HeapSort() cakwGs_{
}; *%ta5a
LTTMxiq[*
public static String toString(int algorithm){ iBt<EM]U/
return name[algorithm-1]; ]~@uStHn
} 7PW7&]-WQ
RxA:>yOPn
public static void sort(int[] data, int algorithm) { v&)G~cz
impl[algorithm-1].sort(data); 0t?g!
} @s|G18@
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public static interface Sort { GboZ T68
public void sort(int[] data); B;^1W{%J
} vNQ|tmn
.O&[9`"'
public static void swap(int[] data, int i, int j) { xdgbs-a)
int temp = data; '!"rE1e
data = data[j]; 2w;Cw~<=d
data[j] = temp; H1d2WNr[
} 9]^q!~u
} C({r1l4[D