[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; f'Mop= .
} ,_ 2x{0w:>
int i1=l; N_gD>6I
int i2=mid+1; Bi%x`4Lf
for(int cur=l;cur<=r;cur++){ &#{dWObh
if(i1==mid+1) r6.d s^
data[cur]=temp[i2++]; ~/#1G.H
else if(i2>r) vGd1w%J-
data[cur]=temp[i1++]; &, a3@i
else if(temp[i1] data[cur]=temp[i1++]; Fke//- R
else 7<\C?`q"
data[cur]=temp[i2++]; C(?blv-vM0
} V-yUJ#f8[
} tT%/r,
^s:y/Kd
} >l5$9wO
6<'K~1do:
改进后的归并排序: &2.u%[gO[q
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package org.rut.util.algorithm.support; 2t#L:vY
'DbMF?<.
import org.rut.util.algorithm.SortUtil; wIvo"|%
Vm1-C<V9
/** A<MtKb
* @author treeroot `)$_YZq|SR
* @since 2006-2-2 0#p/A^\#7M
* @version 1.0 e]8,:Gd(
*/ Am4lEvb
public class ImprovedMergeSort implements SortUtil.Sort { $&I'o
5g5'@vMN
private static final int THRESHOLD = 10; fz_nsVD
ZI>km?w
/* Q;/a F`
* (non-Javadoc) KA s1(oG
* \3YO<E!t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (g!p>m!Z
*/ UK[v6".^h
public void sort(int[] data) { J5M+FwZq
int[] temp=new int[data.length]; [1G^/K"
mergeSort(data,temp,0,data.length-1); >!6JKL~=
} kSncZ0K{
R!\EKH
private void mergeSort(int[] data, int[] temp, int l, int r) { i'/m4 !>h
int i, j, k; 2h=%K/hhY
int mid = (l + r) / 2; HfNDD|Zz
if (l == r) `TLzVB-j3
return; W6c]-pc
if ((mid - l) >= THRESHOLD) +K",^6%1
mergeSort(data, temp, l, mid); /+K?
else ^C)n$L>C0
insertSort(data, l, mid - l + 1); '-$XX%TOAc
if ((r - mid) > THRESHOLD) Rqipkx
mergeSort(data, temp, mid + 1, r); tfO#vw,@
else YPDf Y<?v
insertSort(data, mid + 1, r - mid); v6(E3)J7
256LHY|6
for (i = l; i <= mid; i++) { y2L#:[8
temp = data; }ut]\]b
} <U Zd;e@
for (j = 1; j <= r - mid; j++) { 7L5P%zLtB
temp[r - j + 1] = data[j + mid]; D=f7NVc>Q
} : esg(
int a = temp[l]; z,SYw &S
int b = temp[r]; Aj>[z8!,
for (i = l, j = r, k = l; k <= r; k++) { }GwVKAjP
if (a < b) { Ka!I`Yf
data[k] = temp[i++]; I<oL}f
a = temp; >`RRP}u=u
} else { Ut@RGg+f8
data[k] = temp[j--]; >H][.@LyR
b = temp[j]; eU+ {*YJg
} 4vnUN
} I,@r5tKo
} F0Jx(
ChrY"
/** OTWkUB{
* @param data d50Vtm\
* @param l XKOUQc4!R
* @param i vT^Sk;E
*/ Sb2v_o
private void insertSort(int[] data, int start, int len) { +xv!$gJEj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z`Wt%tL(
} :fcM:w&
} dIweg=x
} t:~t@4j}
} UKd'+R]
2.uA|~qH
堆排序： 1k8x%5p
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package org.rut.util.algorithm.support; IE~%=/|
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import org.rut.util.algorithm.SortUtil; unl1*4e+
K]oM8H1
/** ^y.nDs%ZT7
* @author treeroot C2U~=q>>
* @since 2006-2-2 rt-\g1x
* @version 1.0 &$FvWFRh#
*/ nv0@xnbz
public class HeapSort implements SortUtil.Sort{ q(o/yx{bm
5FKBv e@
/* (non-Javadoc) JNI>VP[c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?WI3/>:<
*/ I_)*)d44_
public void sort(int[] data) { fN%jJ-[d
MaxHeap h=new MaxHeap(); +Lm4kA+aE5
h.init(data); 'Ye v}QM
for(int i=0;i h.remove(); `|O yRU"EK
System.arraycopy(h.queue,1,data,0,data.length); 3k$[r$+"
} 2/P"7A=<
Et2JxbD
private static class MaxHeap{ kTIYD o
:t$aN|>y
void init(int[] data){ ihe(F7\U
this.queue=new int[data.length+1]; 9v)%dO.
for(int i=0;i queue[++size]=data; bKVj[r8D~
fixUp(size); u+9<&)X0
} u^W2UE\
} _,AzJ^
v5ur&egVs
private int size=0; []W;t\h
l3o#@sz:
private int[] queue; #G]!%
zJlQ_U-!
public int get() { 7^TV~E#
return queue[1]; Tpp&
} ?^#lWx q
's x\P[a
public void remove() { qOV[TP,
SortUtil.swap(queue,1,size--); CG]Sj*SA~
fixDown(1); :,pSWfK H
} @ez Tbc3
file://fixdown K ?$#ntp
private void fixDown(int k) { !<@J6??a}s
int j; ^nK7i[yF.k
while ((j = k << 1) <= size) { gYop--\14]
if (j < size %26amp;%26amp; queue[j] j++; ybdd;t}&1
if (queue[k]>queue[j]) file://不用交换 xG&SX#[2
break; +#J,BKul
SortUtil.swap(queue,j,k); \$*$='6"
k = j; t=euE{c
} Kr`]_m
} +V862R4,o
private void fixUp(int k) { q~K(]Ya/
while (k > 1) { @JkK99\(>9
int j = k >> 1; qF)<H
if (queue[j]>queue[k]) 7Du1RuxP
break; nxm$}!Df
SortUtil.swap(queue,j,k); R5_i15<
k = j; 8[%Ao/m
} qa >Ay|92e
} [&S}dQ"
Oeya%C5'
} \a^,sV
th5g\h%j*
} Wo$%9!W
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SortUtil： cTZ.}eLh
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package org.rut.util.algorithm; \[2lvft!
$gle8Z-
import org.rut.util.algorithm.support.BubbleSort; n_D8JF
import org.rut.util.algorithm.support.HeapSort; VzS&`d.h
import org.rut.util.algorithm.support.ImprovedMergeSort; @gGRm
import org.rut.util.algorithm.support.ImprovedQuickSort; L];y}]:F*
import org.rut.util.algorithm.support.InsertSort; 'WyTI^K9
import org.rut.util.algorithm.support.MergeSort; ?wpB`
import org.rut.util.algorithm.support.QuickSort; VxO%rq3
import org.rut.util.algorithm.support.SelectionSort; M.}7pJ7f
import org.rut.util.algorithm.support.ShellSort; #b0{#^S:
_1Z=q.sC
/** lt'I,Xt
* @author treeroot Eu<1Bse;
* @since 2006-2-2 Mq%,lJA\
* @version 1.0 7YWNd^FI V
*/ HHk)ZfWRo
public class SortUtil { Y]aW)u
public final static int INSERT = 1; `:{B(+6
public final static int BUBBLE = 2; }*U[>Z-eO
public final static int SELECTION = 3; 2Nc>6
public final static int SHELL = 4; -5G)?J/*
public final static int QUICK = 5; 96Wp!]*
public final static int IMPROVED_QUICK = 6; =;~I_)Pg1
public final static int MERGE = 7; 1{"llD
public final static int IMPROVED_MERGE = 8; ?z-}>$I;
public final static int HEAP = 9; ^>4o$}
JMBK{JK>
public static void sort(int[] data) { 5wtTP ;P
sort(data, IMPROVED_QUICK); ']6VB,c`
} JHn*->m
private static String[] name={ }]P4-KqI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q!'rz
}; Z@D*1\TG=
iGXI6`F"
private static Sort[] impl=new Sort[]{ `xS{0P{uj
new InsertSort(), t-%Q`V=[
new BubbleSort(), [V#r7a
new SelectionSort(), ^S)TO}e
new ShellSort(), [(LV
new QuickSort(), p 5u_1U0
new ImprovedQuickSort(), BF|(!8S$U
new MergeSort(), m8]?hJY3l
new ImprovedMergeSort(), {-zMHVw=}
new HeapSort() :Gqy>)CxX
}; Tn-C>=tR~%
DdV'c@rq+
public static String toString(int algorithm){ V% TH7@y
return name[algorithm-1]; %n0;[sD0A
} ;bu#8,
T0HuqJty
public static void sort(int[] data, int algorithm) { $e%2t^ i.g
impl[algorithm-1].sort(data); 3Q}$fQ&S
} JEn3`B!*
rWtZj}A
public static interface Sort { =#5D(0Ab
public void sort(int[] data); <T?oKOD ]
} OqhD7 +
@pV5}N[]
public static void swap(int[] data, int i, int j) { z(RL<N%
int temp = data; ~K_Uq*dCE
data = data[j]; <{(/E0~V/<
data[j] = temp; &6 -k#r
} 4tA_YIv
} Die-@z|Y