[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; b\f O8{k
} #x@$lc=k3
int i1=l; eNh39er
int i2=mid+1; ^+ml5m
for(int cur=l;cur<=r;cur++){ WH%g(6w1j
if(i1==mid+1) cs48*+m
data[cur]=temp[i2++]; _r#Z}HK
else if(i2>r) ZT*ydln
data[cur]=temp[i1++]; '(6z. toQ
else if(temp[i1] data[cur]=temp[i1++]; yHYsZ,GE
else `K"L /I9
data[cur]=temp[i2++]; v4<nI;Ux
} \Dm";Ay>
} 3l]lwV
'B$yo]
} SZ7:u895E
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改进后的归并排序: {'flJ5]
P.se'z)E
package org.rut.util.algorithm.support; rE7G{WII
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import org.rut.util.algorithm.SortUtil; h#I>M`|
$V;i '(&7
/** 4IK(7
* @author treeroot fy1|$d{'
* @since 2006-2-2 Mc lkEfn
* @version 1.0 ]2A^1Del
*/ S)(.,x
public class ImprovedMergeSort implements SortUtil.Sort { + /G2fhE
- nm"of\o
private static final int THRESHOLD = 10; 2YL?,uLS
+bxYGD
/* &$BjV{,/zc
* (non-Javadoc) 1y&\5kB
* >dXGee>'M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e)IzQ7Zex
*/ +.8 \p5
public void sort(int[] data) { rw[ph[\X
int[] temp=new int[data.length]; d7^}tM
mergeSort(data,temp,0,data.length-1); b#c:u2
} &N9 a<w8+
zC:ASt
private void mergeSort(int[] data, int[] temp, int l, int r) { b)#hSjWO#
int i, j, k; -:^U_FL8un
int mid = (l + r) / 2; n)/z0n!\
if (l == r) ZmqKQO
return; QpH'PYy
if ((mid - l) >= THRESHOLD) -/B+T>[nTb
mergeSort(data, temp, l, mid); Z3e| UAif
else uh_RGM&
insertSort(data, l, mid - l + 1); *tFHM &a
if ((r - mid) > THRESHOLD) "s-"<&>a(
mergeSort(data, temp, mid + 1, r); a~`eQ_ND
else k8yEdi`
insertSort(data, mid + 1, r - mid); Eh`7X=Z7E
Ufj`euY
for (i = l; i <= mid; i++) { m,28u3@r
temp = data; ;]puq
} o#)C^xlQ
for (j = 1; j <= r - mid; j++) { 'c&Ed
temp[r - j + 1] = data[j + mid]; T.F!+
} hW')Sp
int a = temp[l]; P;y45b
int b = temp[r]; RU{twL.B
for (i = l, j = r, k = l; k <= r; k++) { ? V1*cVD6i
if (a < b) { yu {d! {6
data[k] = temp[i++]; t,Lrfv])
a = temp; udH7}K v
} else { ]]![EHi(\
data[k] = temp[j--]; TprTWod2]t
b = temp[j]; M.D1XX1/
} 1nM #kJ"
} <{p4V|:
} 4KAZ ':
;}WeTA_-[
/** mUC)gA/
* @param data PQt")[
* @param l w(Ovr`o?9t
* @param i SGRp3,1\4%
*/ Jrf=@m\dk
private void insertSort(int[] data, int start, int len) { KkyVSoD\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }Bh8=F3O Q
} :VBV&l` [
} w/<L Ag
} s+Pq&<nV-
} "^[ 'y7i
bP#:Oi0v`
堆排序： 9=M$AB
v"$L702d$\
package org.rut.util.algorithm.support; tT8%yG}
2|y"!JqE1
import org.rut.util.algorithm.SortUtil; +/7?HGf
u#fM_>ML
/** yzn%<H~
* @author treeroot GVr1`l
* @since 2006-2-2 TqQB@-!
* @version 1.0 /HEw-M9z
*/ s[*rzoA
public class HeapSort implements SortUtil.Sort{ .sW|Id )
ODN/G%l
/* (non-Javadoc) Paq4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2qNt,;DQ
*/ @;4zrzQi7
public void sort(int[] data) { <}Vrl`?h
MaxHeap h=new MaxHeap(); 7+cO_3AB
h.init(data); s^TZXCyF o
for(int i=0;i h.remove(); %0?KMRr
System.arraycopy(h.queue,1,data,0,data.length); *Q.>-J<S
} CW K7wZM
uZYF(Yu
private static class MaxHeap{ }tuC}
Q*cf(
void init(int[] data){ <=&`ZH
this.queue=new int[data.length+1]; gg/-k;@ Rf
for(int i=0;i queue[++size]=data; iVr JQ
fixUp(size); ^CH=O|8j
} 8d{0rqwNE
} J{<X7uB
Hio0HL-
private int size=0; S+6.ZZ9c
,THw"bm
private int[] queue; {uFO/
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public int get() { V &T~zh1
return queue[1]; MJ)RvNF
} D)P._?
3M`M
public void remove() { v/plpNVp>
SortUtil.swap(queue,1,size--); >6-`}G+|
fixDown(1); hfB%`x#akQ
} }v{LRRi
file://fixdown 3\,4 ]l|
private void fixDown(int k) { 7EEl+;wK
int j; LOYk9m
while ((j = k << 1) <= size) { G!##X: 6'
if (j < size %26amp;%26amp; queue[j] j++; C.P*#_R
if (queue[k]>queue[j]) file://不用交换 MjRHA^b
break; $HzBD.CF|x
SortUtil.swap(queue,j,k); =XQ%t @z0
k = j; ?j.,Nw4FC
} {YC@T(
} ]/6z; ~3U
private void fixUp(int k) { e`s ~.ZF
while (k > 1) { >R_&Ouh:
int j = k >> 1; G_JA-@i%
if (queue[j]>queue[k]) 372rbY
break; u#~RkY7s
SortUtil.swap(queue,j,k); (WJRi:NP?
k = j; Jpq~
} t?gic9 q
} T!{w~'=F
fOrH$?
} kZ:ZtE
f~[7t:WD*
} t@;p
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SortUtil： Z{d^-
ajT*/L!0_
package org.rut.util.algorithm; I{2hfKUe`
C) s5D
import org.rut.util.algorithm.support.BubbleSort; 0+ '&`Q!u
import org.rut.util.algorithm.support.HeapSort; }<r)~{UV
import org.rut.util.algorithm.support.ImprovedMergeSort; $PPi5f}HD
import org.rut.util.algorithm.support.ImprovedQuickSort; Zi i
import org.rut.util.algorithm.support.InsertSort; Q&;9x?e
import org.rut.util.algorithm.support.MergeSort; ?V=ZIGj
import org.rut.util.algorithm.support.QuickSort; ru%y
import org.rut.util.algorithm.support.SelectionSort; EZGIf/ 3
import org.rut.util.algorithm.support.ShellSort; *^4"5X@
eByz-,{P
/** e*C(q~PQ
* @author treeroot JQI: sj
* @since 2006-2-2 q;CiV
* @version 1.0 A)!*]o>U
*/ x,-75
public class SortUtil { ioCsV
public final static int INSERT = 1; "S]TP$O D
public final static int BUBBLE = 2; 3 i0_hZ
public final static int SELECTION = 3; BWrxunHO
public final static int SHELL = 4; BU_nh+dF
public final static int QUICK = 5; AT3Mlz~7#
public final static int IMPROVED_QUICK = 6; _{KG 4+5\X
public final static int MERGE = 7; ND;#7/$>
public final static int IMPROVED_MERGE = 8; %> eiAB_b
public final static int HEAP = 9; p2](_}PK
Kc-W&?~y#1
public static void sort(int[] data) { LRA8p<Rs
sort(data, IMPROVED_QUICK); n84|{l581
} SnfYT)Ph
private static String[] name={ 4VSU8tK|N]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Sm|6 %3
}; VA5xp]
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private static Sort[] impl=new Sort[]{ Hn"RH1Zy
new InsertSort(), u6agoK|^9
new BubbleSort(), n>YKa)|W`
new SelectionSort(), NLqzi%s
new ShellSort(), da(<K}
new QuickSort(), T5h H
new ImprovedQuickSort(), 4[eXe$
new MergeSort(), cwg"c4V
new ImprovedMergeSort(), z:*|a+cy
new HeapSort() Z9|P'R(l
}; _DtV
/4Gt{ygSr
public static String toString(int algorithm){ 5j(k:a+!H
return name[algorithm-1]; ~>|ziHx
} 8Z~EwY*
iBaA9
public static void sort(int[] data, int algorithm) { $&td=OK
impl[algorithm-1].sort(data); e"<OELA
} VPo".BvG6
,zjv7$L
public static interface Sort { ":ue-=&M
public void sort(int[] data); 0l6.<-f{
} (<9u-HF#
8A#;WG
public static void swap(int[] data, int i, int j) { 4hj|cCrO
int temp = data; =^?/+p8k
data = data[j]; 4pvMd
data[j] = temp; hgq;`_;1,
} 0=YI@@n)
} qE"OB