[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; T-F8[dd^/
} :d1Kq _\K
int i1=l; Y>2oU`ly,
int i2=mid+1; QCJf
for(int cur=l;cur<=r;cur++){ h^v+d*R N
if(i1==mid+1) E3V_qT8
data[cur]=temp[i2++]; 'i:S=E F
else if(i2>r) f]NaQ!. 7
data[cur]=temp[i1++]; xey?.2K1A
else if(temp[i1] data[cur]=temp[i1++]; * `3+x
else Owz>g4l r
data[cur]=temp[i2++]; |33_="
} ?>Bt|[p:s)
} ]|QA`5=$
O:j=L{,d^
} q|_Cj]{
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改进后的归并排序: +2#pP
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package org.rut.util.algorithm.support; SoHw9FtS
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import org.rut.util.algorithm.SortUtil; ra F+Bt`
3ih:t'N-
/** t vp kc;
* @author treeroot 8vx#QU8E/
* @since 2006-2-2 xf3;:soC
* @version 1.0 F;ELsg
*/ Bq~?!~\?.
public class ImprovedMergeSort implements SortUtil.Sort { CqLAtS X7
!-Uq#Ea0/
private static final int THRESHOLD = 10; H2{&da@D5
zB8J|uG
/* .Fx-$Yqy
* (non-Javadoc) ~.Er
* \iH\N/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^Sc48iDc
*/ ? @- t.N
public void sort(int[] data) { ]Wn=Oc{F
int[] temp=new int[data.length]; 2,rjy|R`
mergeSort(data,temp,0,data.length-1); xJ^pqb
} %'MR;hQsd8
]RuH6d2d|
private void mergeSort(int[] data, int[] temp, int l, int r) { yK>s]65&
int i, j, k; >mMmc!u>G
int mid = (l + r) / 2; V9;O1
if (l == r) &4m;9<8\
return; MtG~O;?8
if ((mid - l) >= THRESHOLD) rsD? ;XzH
mergeSort(data, temp, l, mid); JqK-vvI
else }g"K\x:Z
insertSort(data, l, mid - l + 1); G(hzW%P
if ((r - mid) > THRESHOLD) ]#\/1!W
mergeSort(data, temp, mid + 1, r); 3J[ 5^
else Uc0Sb
insertSort(data, mid + 1, r - mid); ]GiDfYs7%
gmCB4MO
for (i = l; i <= mid; i++) { V4. }wz_Y
temp = data; \eCQL(_
} yHmNO*(
for (j = 1; j <= r - mid; j++) { `aM8L
temp[r - j + 1] = data[j + mid]; a;v;%rs
} Es&'c1$^s
int a = temp[l]; $yZ(ws
int b = temp[r]; Q oWjC
for (i = l, j = r, k = l; k <= r; k++) { w/wU~~
if (a < b) { 4EFP*7X
data[k] = temp[i++]; O7xBMqMf
a = temp; xL|4'8
} else { "uU[I,h
data[k] = temp[j--]; q;<Q-jr&O
b = temp[j]; ~2}^ -,
} jO5Wemqf
} {%8=qJ3@
} E#`JH
*cc|(EM
/** 3&Fqd
* @param data pJ_>^i=
* @param l ]Czq A c
* @param i vb2aj!8_?
*/ +zzS
private void insertSort(int[] data, int start, int len) { 8_uh2`+Bvb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PF]Vt
} vW03nt86
} .KxE>lJbqM
} sX#7;,Ft7
} % ^&D,
*Vp$#Rb
堆排序： D}K/5iU]a
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package org.rut.util.algorithm.support; V5]:^=
`bEum3l\6]
import org.rut.util.algorithm.SortUtil; -P$E)5?^
Yd$64d7,h
/** N0&#fXO
* @author treeroot 23gJD8i8
* @since 2006-2-2 ?`Som_vKO
* @version 1.0 J.pe&1
*/ Bk8 '*O/)
public class HeapSort implements SortUtil.Sort{ ;/ao3Q
1a;&&!X
/* (non-Javadoc) zNQ|G1o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wg5i#6y8w
*/ o/p'eY:)
public void sort(int[] data) { Lz;E/a}s
MaxHeap h=new MaxHeap(); "6P-0CJ
h.init(data); x^JjoI2vf
for(int i=0;i h.remove(); }NETiJ"6
System.arraycopy(h.queue,1,data,0,data.length); 8A|i$#.&
} p> 4bj>Ql
{bPcr hB
private static class MaxHeap{ &Qq4xn+J
dIDs~
void init(int[] data){ XrQS?D`
this.queue=new int[data.length+1]; :Qklbd[9qF
for(int i=0;i queue[++size]=data; (?pn2- Ip
fixUp(size); Y$6W~j
} O7\)C]A
} pI{s )|"
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private int size=0; m#(ve1E
8v']>5S]#
private int[] queue; m7~[f7U
ti9cfv>
public int get() { !YEU<9
return queue[1]; G/C5o=cY
} $;t#pN/`
Ss{
public void remove() { {T[/B"QZG
SortUtil.swap(queue,1,size--); ;t}ux
fixDown(1); 7<%Rx19L*
} LYX\#
file://fixdown 5s2334G
private void fixDown(int k) { \|9KOulr
int j; Zx}.mt#}8
while ((j = k << 1) <= size) { hDs.4MZC`
if (j < size %26amp;%26amp; queue[j] j++; Rd.[8#7VE
if (queue[k]>queue[j]) file://不用交换 G0eJ<*|_ 3
break; Ig6>+Mw
SortUtil.swap(queue,j,k); mLn =SU{#
k = j; ()+;KF8
} ^NTOZ0x~#
} =xX\z\[A
private void fixUp(int k) { 6">jf #pE
while (k > 1) { 'zhw]L;'g
int j = k >> 1; 0yxMIX
if (queue[j]>queue[k]) id.W"5+
break; J8yi#A>+
SortUtil.swap(queue,j,k); Wy%F
k = j; D?_#6i;DJ
} g$*VA} s
} zorTZ #5
/< CjBW:
} ;{~F7:i
'3@WF2a
} 6'6@VB
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SortUtil： jq&$YmWp
L%.GKANM
package org.rut.util.algorithm; l@om2|B
y]`@%V2P
import org.rut.util.algorithm.support.BubbleSort; &xqr&(o
import org.rut.util.algorithm.support.HeapSort; B$)6X
import org.rut.util.algorithm.support.ImprovedMergeSort; -zVa[&
import org.rut.util.algorithm.support.ImprovedQuickSort; [\&Mo]"0
import org.rut.util.algorithm.support.InsertSort; 0|:Ic,
import org.rut.util.algorithm.support.MergeSort; _r|$H_#
import org.rut.util.algorithm.support.QuickSort; M_4g%uHG
import org.rut.util.algorithm.support.SelectionSort; uOrvmb
import org.rut.util.algorithm.support.ShellSort; W+~ w
.SdEhW15)
/** 1W5\
* @author treeroot +mT}};-TS
* @since 2006-2-2 VPTT*a`
* @version 1.0 )Cz^Xp)#
*/ >cD+&h34
public class SortUtil { c])b?dJ*
public final static int INSERT = 1; 5Ffz^;i
public final static int BUBBLE = 2; Al`[Iu&
public final static int SELECTION = 3; 9Yowz]')
public final static int SHELL = 4; `8TM<az-L
public final static int QUICK = 5; gH0B[w ]
public final static int IMPROVED_QUICK = 6; %6"b< MAO
public final static int MERGE = 7; puv*p%E
public final static int IMPROVED_MERGE = 8; ^F~e?^s
public final static int HEAP = 9; [,a O*7N
[lA[wCw
public static void sort(int[] data) { 8P!dk5,,O
sort(data, IMPROVED_QUICK); Sh]x`3 ).
} fwRlqfi
private static String[] name={ bhSpSul
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z[S,hD\w
}; \wNn c"
t{>66jm\R
private static Sort[] impl=new Sort[]{ c+G: bb%p
new InsertSort(), _A)<"z0E
new BubbleSort(), XI\aZ\v
new SelectionSort(), Rhx7eU#&
new ShellSort(), BQBO]<99
new QuickSort(), h ;5 -X7
new ImprovedQuickSort(), +c\s%Gzrh
new MergeSort(), vd /_`l.D
new ImprovedMergeSort(), KX)xCR~
new HeapSort() 4W.;p"S2
}; %`}CbD6
uPV,-rm[F_
public static String toString(int algorithm){ $_Qo
return name[algorithm-1]; A0rdQmrOL
} Ytx+7OLe
ojVpw4y.
public static void sort(int[] data, int algorithm) { BPrA*u}T
impl[algorithm-1].sort(data); 6EK+]0
} 6DJ,/J2F
:<&}/r
public static interface Sort { DcbL$9UI
public void sort(int[] data); Bw*z4qb{yH
} _T5~B"*
oJ8_hk<Va8
public static void swap(int[] data, int i, int j) { 2,&lGyV#
int temp = data; cJ8F#t
data = data[j]; fsjA7)/
data[j] = temp; d=qpTb;(
} OV8b~k4=
} R/^JyL